Potential Impacts by Tropical Storm Nate this Weekend

Tropical Storm Nate, which developed as a depression yesterday, made landfall in Nicaragua this morning and is moving over eastern Nicaragua and Honduras this evening. Very heavy rainfall and flash flooding has already resulted in 22 deaths in Nicaragua and Costa Rica.

Heavy showers and thunderstorms producing heavy rain over portions of Central America from Tropical Storm Nate this evening and into tonight. (image valid at 5:15 pm CDT).

Nate is progressing generally northward and will emerge over the Northwest Caribbean Sea late tonight where it will have an opportunity to reorganize. The waters over that region are running in the range of 84-86 degrees F (29-30 degrees C), more than sufficient for re-intensification. With that said, the inner core will likely be badly “gutted” by the mountainous terrain of Nicaragua and Honduras and with a second landfall possible Friday evening, time will likely be limited for more robust intensification. With that said, minimal hurricane strength is possible, with a lower chance that the storm may get stronger if it’s inner core can re-organize quickly Friday.

National Hurricane Center forecast (issued 5 pm EDT Thursday) showing a likely landfall on the Yucatan Peninsula of Mexico Friday evening and likely US impacts on the northern Gulf Coast beginning Saturday evening.

A Hurricane Watch and Tropical Storm Warning is in effect for much of the coastal Yucatan Peninsula. Again, the major threats will be from water…heavy rain and freshwater flooding and also modest (although still hazardous) storm surge and high wave action.

Potential Impacts for Central Gulf Coast of US-

While many details are still in need of being honed in for the Central Gulf Coast…it is highly likely a tropical storm or minimal hurricane will approach the region Saturday evening with landfall early morning Sunday. The biggest threats will be from water (flooding/surge) with wind producing damage from falling trees and power outages.

NWS Weather Prediction Center 5 day accumulative rainfall forecast (valid beginning 7 pm CDT Thursday) showing heavy rainfall along the track of Nate and its remnants expected, particularly Saturday afternoon into early next week. Very heavy rainfall possible in Greater New Orleans area which is prone to freshwater flooding.

Sea surface temperatures are slightly cooler along the northern Gulf Coast north of the Loop Current (82-84 degrees F/28-29 degrees C). Still more than warm enough for intensification if the system can remain over the current (a slightly farther west track may leave it over slightly cooler waters longer).

Analysis of Sea Surface Temperatures and the Loop Current. Nate will track along the Loop Current much of its track over water, providing with fuel to re-intensify. (Analysis by Earth Nullschool).

Also, given the shear currently over the Central Gulf will relax over the next couple of days (as an area of upper-level high pressure over Texas shifts westward and weakens), Nate will have an opportunity to re-intensify over the Gulf after leaving the Yucatan Peninsula. Computer models have some variability in timing of an upper trough which will move over the US Central Plains during the day Saturday. This will ultimately influence the exact track of the center of Nate. However both deterministic and ensemble members of the various models depict a likely landfall of the center somewhere from Southeast Louisiana to coastal Mississippi/Alabama. Regardless, widespread heavy rain (particularly near and east of the center), moderate storm surge flooding and high wind conditions will be likely over the coastal areas of these states by Saturday afternoon, spreading inland Saturday night and Sunday. Tropical storm force winds (sustained 39 mph+) will likely arrive on the LA Coast Saturday evening.


Earliest Reasonable Arrival Time for Tropical Storm-Force (issued 5 pm EDT). Folks along the Central Gulf Coast should have preparations for stormy conditions completed by Saturday afternoon.

Tropical cyclone watches will likely be issued for portions of Louisiana, Mississippi and Alabama late tonight or early tomorrow morning.

Climatology Update-

The Atlantic Hurricane Season is currently running above normal (1966-2010 norms in parenthesis): 14 named storms (9), 8 hurricanes (6) and 5 major hurricanes (2). In terms of Accumulated Cyclone Energy (a function of maximum sustained winds over time), 2017 ranks (as of this post) as the 6th most active season on record for the North Atlantic Basin. The average temperature of the North Atlantic Main Development region (open tropics west of Africa) exceeded 83 degrees F (~28 degrees C) for the 9th time since 2002 (had never done so in the record prior going back to 1981). The MDR is the 3rd warmest on record overall.



Start of October Drought and Climate Update

Nearly 14% of the Continental US is in at least moderate drought conditions right now. The most highly afflicted areas are over the northern tier states west of the Mississippi River…the Dakotas, Montana, Idaho, Washington and Oregon.


There are scattered areas of drought and abnormally dry conditions across other parts of the country. However, an isolated area of severe to extreme drought has been hitting south-central Iowa for much of the summer and there are also areas of moderate drought developing over the the Desert Southwest and eastern Maine.

The level of dryness, particularly over Western North America has promoted a significant fire season, which continues at this time. British Columbia is having its worst fire season on record and the Western US is having an unexpectedly destructive fire season. This even after much of the region had a wet winter, showing that a significant period of dryness following well-grown fuels from a wet season can still lead to a major fire season. As of October 4, 2017, nearly record 8.5 million acres have been burned in the United States in 2017.* While below the 2015 record of 10.12 acres, it should be noted that anthropogenic climate change is increasing the risk of fire seasons in the US over 3 million acres and there has been a significant increase in fire seasons of 3 million acres or more since the turn of the century. 2017 may rank in the Top 3 for fire seasons (along with 2015 and 2012). Temperatures across the West were well-above normal or record levels over the summer. Various records for heat (as well as persistence of warmth and dryness) were broken in places such as Western WA/OR, central and southern CA as well as the portions of the Interior West.

Drought Outlook for October 2017. Drought is expected to dissipate in Western WA from the incoming wet season, and improve somewhat in northeast MT. However, much of the drought in the US will persist and in fact additional areas may develop over the central Midwest and Mid-Atlantic states.
The Probabilistic Precipitation Outlook valid Oct 10-16, 2017. This suggest by mid-month, the atmospheric pattern will be favorable for drier than normal conditions over the center of the nation with near normal or wetter than normal conditions over the coastal regions. The Climate Prediction Center also shows above normal temperatures likely over the Southwest US and Eastern third of the country. Dryness will maintain or promote further development of drought conditions in portions of the nation’s interior.

As of today, the NWS Climate Prediction Center indicates a 55-60% chance that a La Nina climate pattern will develop late in the Northern Hemisphere Fall and into the Northern Hemisphere winter. This is characterized by an intensified Walker Circulation (the east-west tropical Pacific wind circulation) and intensified cold water upwelling along and offshore the coast of South America.

Weather patterns common during La Nina events include abnormally wet, cool conditions in the western Pacific Northwest and TN/OH valleys, but abnormally dry and warm conditions across the southern tier of the United States. This is partially incorporated into the monthly and seasonal drought and temperature/precipitation outlooks.


For those curious, the climate models are showing the US having a more than likely above normal winter throughout (including AK) with the La Nina-like distribution of precipitation (likely above normal Northwest, below normal Southeast). More on winter as we get closer.

*-I incorrectly stated that total acres burned in the US was around 3 million acres. (10/4/17)

Global Climate Change and its Potential Connection to Hurricane Activity (cited research)

Because of recent North Atlantic Hurricane Season activity…many people have questioned whether hurricanes are becoming stronger and more numerous because of climate change. In the social media universe, I’ve seen many opinionated debates within the general public, as well as meteorologists and perhaps a few sprinkling of climatologist opinions here and there. Not to mention, interesting statements from non-climate scientists. What I have not seen much, however, is any discussion of peer-reviewed research on the topic. There’s so much knowledge being gathered every year by scientists trying to answer important questions about our past, present and future. How climate change will impact regional weather and climates is one of the most important questions because of potential impacts to people, agriculture and natural resources.

I decided to do a (very brief) search of literature on science’s current understanding of climate change as it relates to tropical cyclones. I looked into both the potential connection of global warming to these events in the current climate (attribution), as well as projections for these events based on the “business-as-usual” scenario for carbon dioxide emissions, which is a high emissions scenario and steady increase in CO2 concentration. Research cited are just a sampling of what’s out there and what I looked over. Here are some themes I found interesting (takeaway statements at the end):

Climate models* appear to show a signal toward more intense (Category 4-5 Saffir-Simpson) tropical cyclones overall in the world by the latter half of the 21st century. However, there is also a potential for a downward trend in cyclone numbers in many basins (see #1-4).

The decrease in overall cyclone numbers by the second half of the century is thought to be a product of increasing vertical wind shear over tropical oceans limiting weaker storms. However, many researchers expect there to be a significant upward trend in more intense storms (Category 4-5) as the oceans continue to warm and tropical cyclone formation and track density moves poleward. So formerly less favorable sub-regions of basins may see an overall increase in cyclone activity (with more storms which will be stronger than before in those regions) and in the increasingly less hospitable regions (over the long term), storms which do form when conditions are favorable on short time scales may see cyclones which are also more intense than in years past.

As for historical conditions leading to the present…there does not appear to be a conclusive signature by global warming on tropical cyclone intensity outside of natural variability on a global scale (3-4). However, some regional signals related to frequency changes are being actively studied. 

There is some suggestion (4) based on modeling past climate change to the present time that warming (which would enhance the potential intensity for hurricanes) has been muted by the industrial production of aerosols (particulates like sulfates and nitrates), which actually reflect sunlight from reaching Earth’s surface. However, as warming continues into mid-century, its effect of trapping heat will begin to significantly exceed aerosol cooling effects leading to the more pronounced impacts on cyclone intensity stated earlier (unless CO2 emissions are significantly reduced soon). So while global warming is happening in the background, hurricane potential intensity as we currently witness it is likely still being dominated by natural cycles. (For more on climate change research into tropical cyclones, you can also see this webinar done by climate change researcher Dr. Kerry Emanuel for Climate Central).

With that said, some researchers see signs of a global warming signature associated with recent increased tropical cyclone *frequency* in sub-regions of basins. These include the far eastern portion of the North Atlantic Basin (4), close to the East Asian Coast (5), and a portion of the North-Central Pacific Basin (6). Research is still ongoing on global warming’s past and future influence on activity in individual tropical cyclone basins.

Meanwhile, there is evidence of other impacts related to tropical cyclones (and other significant weather phenomena) and climate change. These include higher rainfall rates (7) and higher storm surge related to sea-level rise from the melting polar ice sheets and thermal expansion of the oceans (8). In addition, there is some scientific evidence that tropical cyclones in recent decades have begun to intensify more rapidly because of increased ocean warming (9). And while not completely clear yet whether it is fully tied to climate change, it is known that the observed North Atlantic Power Dissipation Index (PDI) has increased significantly since the mid-1970s (10; positively correlated to sea surface temperatures) and globally, the strongest tropical cyclones in respective basins have grown stronger since 1981 (Elsner et al, 2008…not included here). Note that scientific critics point out the use of observational data with differences in quality – satellite intensity estimates and reconnaissance flights (or lack of them) – over recent decades could put some uncertainty in these results.

My thoughts? Although inconclusive, possible intensity signals may be a hint of the projected effects of climate change as PDI and high-end cyclone intensity are highly correlated to sea surface temperatures. SSTs are increasing from global warming and this would connect with what climate models suggest of future tropical cyclone activity, if these historical trends are, in fact partially related to climate change.

The Takeaways:

  1. Tropical cyclone intensity at the highest end of the scale appears likely to increase through the 21st century because of climate change, especially if human civilization does not significantly reduce greenhouse gas emissions soon.
  2. While a current climate change signal to intensity is difficult to detect and still a matter of debate, storms in recent decades appear to be intensifying faster, are capable of producing more extreme precipitation events and higher storm surges because of rising sea levels caused by ice sheet melting and thermal ocean expansion. There also appears to be some detectable changes in frequency of storms within individual basins which may locally enhance risk.
  3. Regardless of the exact changes in frequency and intensity of tropical cyclones, the risks to individuals and society because of climate change will increase into the coming decades. It will be important for people and governments to make decisions (beyond greenhouse gas emissions) related to property, coastal land use and emergency management policy to mitigate increasing tropical cyclone hazards, particularly from water (storm surge/inland flooding).

Note: It is of EXTREME importance that those with a desire to communicate climate change issues try to inform our fellow citizens to the best of our ability. Climate change is one of the important issues facing our world (the impact on the global food supply and human health may be actually of greatest importance, but rarely discussed as those aren’t “sexy” topics…). People have their thoughts on the issue based on experiences, politics, religious/spiritual beliefs, etc. However, at the end of the day, we must inform and connect what we know to people’s concerns and allow people to decide as they may. Without censorship (“We can’t discuss climate change right now!”) or nonsensical exaggerations (“So many hurricanes, it’s a new era of superstorms!”). Stay informed (give informed opinions) and tell people why they should care as it relates to their lives. Like everything else we should communicate to the concerns of people. Considering most Americans are now, in fact, concerned about climate change, there’s really NO excuse not to discuss the issue in a serious, informed manner if we have the interest to discuss it at all. 

Additional Note: *-Climate models are not weather forecast models. They do not forecast the atmosphere using initial conditions, but take a climate state (for example, our current climate) and adjust “forcings” on the climate system (carbon dioxide emissions for example). The effect of these changes to “boundary conditions” over time are interpreted for land, sea, the cryosphere and (for Earth System models), the biosphere. Global climate is based on thermodynamic and hydrologic balances which will look for equilibrium when changes to a part of the system are applied. (For more on climate models you can see this webinar by Research Meteorologist Keith Dixon of NOAA’s Geophysical Fluid Dynamics Laboratory for Climate Central).

References (links are PDFs):

#1 – Bell et al. (2013)

#2 – Murakami et al. (2011)

#3 – Wang and Wu. (2013)

#4 –  Sobel et al. (2016)

#5 – Cheng-lin et al. (2016)

#6 – Murakami et al. (2015)

#7 – Knutson et al. (2013)

#8 – Jevrejeva et al. (2016)

#9 – Kishtawal et al. (2012)

#10 – Emanual (2005)

—Meteorologist Nick Humphrey

Update on Hurricane Maria (9:25 am EDT). Catastrophic flash flood/violent wind event ongoing.

Maria made landfall as a powerful Category 4 storm near Yabucoa, PR with maximum sustained winds of 155 mph and minimum central pressure of 917 millibars (at 6:35 am EDT). The hurricane continues to move across the island delivering destructive hurricane force winds and torrential amounts of rain leading to massive flash flooding (including 5-7 inch/hr rainfall rates).

The storm currently has max winds of 145 mph. 

River gauges across PR are rising incredibly fast from the high rainfall rates:

Radar near time of landfall (currently offline):

Hurricane Maria continues to intensify this evening as it makes approach to USVI and Puerto Rico

Hurricane Maria…after devastating the island nation of Dominica with maximum sustained winds of 165 mph and gusts over 190 mph…is now threatening the highly populated US territory of Puerto Rico and also the US Virgin Islands as a Category 5 hurricane. Maximum sustained winds are near 175 mph at 8 pm EDT and the hurricane continues to intensify. It is now the 9th most intense hurricane on record by minimum central pressure (906 millibars as extrapolated by the USAF Reserve Hurricane Hunters; more than 100 mb lower than Earth’s average sea level pressure). For comparison, the most intense hurricane on record in the North Atlantic was 2005 Hurricane Wilma (882 mb) and 2005 Hurricane Katrina by comparison had a minimum central Pressure of 902 mb at its peak with winds of 175 mph (ranked 7th by pressure). There are signs the hurricane is continuing to intensify. The next hurricane hunter plane will arrive in the storm by 10:30 pm EDT.

Mid-level water vapor imagery by the GOES 16 satellite (non-operational, in testing). It shows the very powerful circulation of Maria and the very dry/warm eye in the center (image at 8:27 pm EDT).

As of now, there is absolutely NOTHING to stop the power of the storm, except internal, inner core processes (like an eyewall replacement cycle). The waters under Maria are 1-1.5 degrees C (~2-3 degrees F) above normal and the oceanic heat content (includes warmth with depth) and resulting tropical cyclone heat potential is MUCH above normal along the track.

5-day Track forecast for Maria (NHC).

The eye will pass near or over the island of Saint Croix late tonight and make landfall in Eastern Puerto Rico tomorrow morning. Both landfalls are expected at Category 5 intensity with gusts over 185 mph in the inner core (particularly northern eyewall). In addition to the violent winds, rainfall of 12-18+ inches are possible over the USVI and Puerto Rico, along with landslides in the mountainous terrain, where winds may also be even more violent than near sea-level.

Needless to say, this is a truly horrific situation evolving for a territory of 3.5 million people; and a territory still recovering from much weaker hurricane impacts from Irma two weeks ago. USVI such significant damage from Irma as well.

I will an update on Maria later this evening as new data comes in.

–Meteorologist Nick Humphrey

Violent Hurricane Irma direct threat to Florida Sunday

Violent Hurricane #Irma direct threat to #Florida Sunday. #FLwx

The following is an analysis of the situation related to the potential landfall of Hurricane Irma this weekend in the United States. Let’s take a look at things currently (as of 5 pm CDT Thursday)-

Hurricane Irma is a violent Category 5 hurricane with maximum sustained winds at 175 mph (150 knots). Numerical models have been struggling on the exact path of the hurricane, but the general scenario is clear; there appears to be high confidence that the hurricane will make landfall in South Florida early-Sunday morning. The National Hurricane Center has the hurricane intensity forecast as a high-end Category 4 hurricane near landfall (max winds 150-155 mph with gusts up to 180-190 mph). This is after the hurricane impacts the southern Bahamas and the north Coast of Cuba with hurricane-force winds Friday-Saturday. After landfall either near or just north or south of Miami (this has been fluctuating in forecasts), the system is expected to advance northward spreading destructive winds, heavy rain, and (along the coast) damaging surf/surge northward up the Peninsula of Florida.

Track forecast and current wind extent for Hurricane Irma by the National Hurricane Center as of 5 pm EDT Thursday.
rbtop-animated (2)
Category 5 Hurricane Irma plowing its way through the Turks and Caicos Islands at this time. Maximum sustained winds up to 175 mph with gusts to 210 mph in the inner eye wall surrounding the eye.
Close up view of eyewall of Hurricane Irma impacting the Turks and Caicos Islands this afternoon.

I will not sugar coat this. This is most one of the most serious hurricanes Florida has faced in a very long time. Certainly since Charley in 2004 (Category 4) and perhaps since Andrew in 1992 (Category 5). Enhanced locally by issues such as sea-level rise (climate change) and especially land use changes and urban population growth and land cover changes (geographic changes). In addition sea-surface temperatures (SSTs) were the 3rd highest on record globally for the month of August behind 2016 and 2015 (extraordinary considering no El-Nino in the tropical Pacific…much of the Atlantic basin is running above normal; in the long term trend, SSTs are warming because of climate change, however, shorter term climate variability, including the continued shorter multi-decadal cycle for enhanced SSTs and hurricane activity in the Atlantic contributing). The enhanced SSTs and deep warm waters (oceanic heat content) are leading to Irma having ample fuel to remain extremely powerful for a very long period of time. In fact, it became the longest tropical cyclone ever observed in the satellite era (since 1966) to have a strength of 160 knots (185 mph for 37 hrs straight). It has been a category 5 storm operationally since 8 am EDT Tuesday Sept 5th (now third longest streak on record in the Atlantic Basin as of this post, being out 2004 Hurricane Ivan). All this is from warm SSTs, low wind shear not sufficient to disrupt the circulation and low land interaction with the terrain of Hispaniola, which it managed to largely avoid last night (minus minor inflow of drier air off the mountainous terrain to south of the eye, lowering its intensity slightly).

A HURRICANE WATCH has been issued for much of the coastal areas, including the Keys and Lake Okeechobee (see NHC advisories for updates). Hurricane warnings will likely be issued by tomorrow night as the hurricane continues to approach. Evacuations have been called for portions of the Keys and for Miami-Dade County and other areas. If you are in South Florida and in an evacuation area for storm surge and haven’t evacuated, I would highly suggest you do so or call 311 for aid if you are disabled and have difficulty leaving your home. Surge in portions of South Florida from this hurricane could reach 10 ft or more. This is simply not survivable if you’re along the open ocean coast. It is twice as high as my height (I am 5′ 6″ tall). Surge is dependent upon the track and strength of the storm as well as the tidal heights…and if you stay, you basically put your life in the hands of a lifeless beast…

NHC storm surge guidance (with intertidal layer included to neglect surge flooding in those areas). Based on current forecast track and subject to change (see NHC for updates).

In addition, I do have serious concern Irma could make landfall in South Florida stronger than forecast. The system currently has much going for it. Thus far, the hurricane has exhibited INCREDIBLE resilience. It’s been unable to be significantly impacted by outside forces (weak vertical wind shear which would hamper weaker systems) or internal fluctuations in the inner core region surrounding the eye where the strongest winds are located. This is why Irma has remain so powerful for so long. In addition, beginning basically tonight into tomorrow, it will be entering a region of increasing sea surface temperatures and oceanic heat content (increasing heat with greater depth) and at the same time, the relatively modest vertical wind shear which has attempted to disrupt (largely unsuccessfully) the “inertially stable” inner core will remain modest or even weaken. This means, unless the system moves farther west than forecast and hits Cuba (which would be a catastrophe for them) before turning north, it would will likely (in my opinion) be a Category 5 hurricane as it approaches South Florida last Saturday night-early Sunday. So at least 160 mph sustained with gusts perhaps over 175 mph within the inner eyewall. The surge would be higher than currently forecast and as a result more lethal along the coast, extending farther inland. The winds would also be more destructive at landfall and with greater extent farther inland.

Sea Surface Temperature Analysis for Sept. 6th showing waters of 29-30 degrees C (84-86 degrees F) under Irma currently and waters of 30-31 degrees C (86-88 degrees F) in its path between Cuba and the Bahamas. (NOAA/AOML)
Tropical Cyclone Heat Potential showing oceanic heat of 70-90 kilojoules per sq cm under Irma. It increases up to 100-120 kJ/sq cm between Cuba and the Bahamas.
Shear Analysis showing favorable conditions for vertical wind shear for Irma as it is forecast to move between Cuba and the Bahamas Friday. (CIMSS)

With that said, regardless, of Category 4 or 5, the south-to-north track up the peninsula as a violent hurricane moving at a relative speedy clip (over 15 mph) is a worst-case scenario at it exposes many significant populations to hurricane-force high wind event. A category 4 hurricane at landfall is a catastrophic storm for all hazards as well. Obviously if you are inland and far from the potential surge areas, be ready for days of outages with the necessary supplies and gas (which is quickly running low in many areas!).

If you are in parts of Georgia and South Carolina…keep track of Irma’s track…while there was some talk of it actually making its first landfall in those states, it appears the Florida chances of first landfall are increasing. However, damaging wind gusts (as well as very heavy rain and inland flooding) associated with the landfalling hurricane may spread northward into these states Sunday night-Monday. Track the latest forecasts and be ready for deteriorating weather conditions by the end of the weekend.

I will continue to have frequent updates on things on Twitter and Facebook. I’ll see about more extensive updates on the blog in the coming few days. Hopefully all this writing is wrong and this system misses Florida completely. There has already been incredible damage in Barbuda, Anguilla, the British Virgin Islands, as well as extensive impacts in the US Virgin Islands and Puerto Rico. The Turks and Caicos Island are suffering a direct hit this afternoon/evening. A truly awful storm we can all hope comes to a conclusion soon. But unfortunately the US may be the last on the list of targets folks in the path must be prepared to action to protect life and property.


–Meteorologist Nick Humphrey

EDIT at 7:50 pm CDT: Excuse the typo in the shear analysis graphic. That should say “Hurricane Irma”.

2016 State of the Climate: The Sobering Data

Today The American Meteorological Society, in collaboration with the National Oceanic and Atmospheric Administration released their yearly peer-reviewed “State of the Climate” report detailing the state of the global climate. It is…not positive at all.

You can see the full report HERE. But here are the bullet points:

-The report confirms, via independent datasets that 2016 was the warmest year on record for human observations (most world observations go back to mid-1800s). Not only for Earth’s atmosphere but for the Earth’s oceans.




-The Earth’s surface averaged 1.06-1.21 degrees C above pre-industrial levels (depending on datasets available). It is the second year in a row the global land and ocean temperature averaged over 1 degree C. The “danger” zone for destructive impacts on human society and ecosystems around the world according to climate scientists is 2 degrees C or higher. Even 1.5 C would begin to have very hazardous impacts.


-Global carbon dioxide concentration in Earth’s atmosphere (the main greenhouse gas being added by human activity) exceeded 400 part per million on average for the first time ever in human history. Not only that…This is the highest level in Earth’s atmosphere in at least 800,000 years based on data taken from ice cores.¬†For comparison, pre-industrial levels of carbon dioxide concentration was approximately 280 ppm (only 150 yrs ago).

-The increase in the yearly average of carbon dioxide by 3.5 ppm from 2015 to 2016 is the largest increase observed in the 58 year history of observations.


-2016 featured significant portions of land areas suffering from “extreme heat”…heat above the 90 percentile compared to the 1961-1990 average temperature for the location.



-2016 was the warmest year on record for the ocean, causing major stresses for ocean ecosystems, including coral reefs. Over 90% of global warming heating goes into the oceans (100+ zetajoules (1 x 10^23 joules) since 1993…it takes ~4 joules of heat to warm 1 gram of water by 1 degree C…it takes A LOT of energy to raise the temperature of water).



-Sea levels are rising nearly everywhere, at different rates. Added water and thermal expansion by the heating of water are both factors. This is the 6th consecutive year of increase.


-Severe drought impacted at least 12% of the planet’s land area each month of 2016 for the first time in history. (Note: The drought conditions in the Amazon Rain Forest in 2015-16 the third “100-year” event since 2005 with previous events in 2005 and 2010).


-Arctic sea ice had its lowest winter maximum on record and second lowest summer minimum on record in 2016. The mass of the Greenland Ice Sheet, which has ice up to 110,000 yrs old and has the ability to contribute to up to 7 meters sea-level rise is at a record low value.


-2016 was the 37th consecutive year of worldwide Alpine glacial retreat.

-Across the Northern Hemisphere, snow cover was the 4th least extensive in the 47-yr record.

-Record high temperatures at 20 meters were observed at depth in permafrost observatories in Alaska and Canada.

-The United States had the 2nd warmest year on record in 2016 and the 20th consecutive warmer than normal year.

It’s interesting that this came out today because I was actually just beginning to write the draft to the next in the series of WxClimoEd “Understanding Global Climate Change“. But then this blew up my Twitter LOL. This pretty much gives me a good addition to what I would’ve discussed anyways. So let’s do just that…

It appears to me that we have crossed in the 2015-2017 period some crucial thresholds in the “era” of anthropogenic climate change. We are continuing to pump more carbon dioxide into the atmosphere than Earth can remove through natural processes. We are essentially heavily polluting our atmosphere with CO2. Earth itself appears to have become a “1 degree C” world in terms of average temperature and major impacts expected to develop as a result. In addition, while our atmosphere is heating up, our oceans are also taking in incredible amounts of energy, slowly heating up and it’s quite literally cooking our marine life, all while the oceans undergo acidification from the CO2 they are taking in which is also causing harm to ecosystems. Coral reefs are facing this head on along with hundreds of thousands of species with depend on them. This is discussed is in the documentary Chasing Coral, which I reviewed HERE.

This year…2017…continues to see further signs of major problems which were predicted to be likely results of climate change.

-The first six months of 2017 (January-June) was the second warmest on record behind 2016. It is also the second warmest on record for the United States.


-July saw record heat for the Western US and Alaska including record July or all-time record maximum monthly temps and sea ice within range of the Arctic Ocean coast. Other cities such as Reno, NV and Salt Lake City had their hottest July’s ever. Miami set an all-time record hottest month ever. Death Valley, CA took its wild heat to another level with an average July temperature of 107.4 degrees F making it the hottest month ever recorded in the United States historical record.


-Arctic sea ice is headed for (yet again) one of its lowest extents in the observational record.


-Boreal forests continue to burn at an unprecedented rate not seen in the past 10,000 yrs. Most notably significant fires have broken out in Canada and in the peat of the Arctic on the border of the ice sheet on Greenland.

I’ll write more about the IMPACTS of climate change…estimates of global and regional effects that I intended on writing about hopefully later this week in my regular post series. But in short…we really have no time to lose on this. Governments and citizens MUST do what they can…from individual efforts to industry…to get carbon emissions down. The more carbon dioxide goes into the atmosphere and higher temperatures rise, the greater the uncertainty as far as resulting phenomena such as climate feedbacks which could either hinder or enhance climate change, the latter of course worsening the situation faster. We as humans, we live our lives and we really have no idea how fragile how our world really is. We must realize how destructive a force we are so we can be constructive to ourselves and our world instead.