December 17, 2025

Weather research is a lifesaving effort. Don't let Trump's team destroy it.


"We're gonna get our airplane washed."

The pilots of Delta Air Lines Flight 191 knew that they were heading into rough weather as they approached Dallas-Fort Worth International Airport on the muggy afternoon of August 2, 1985. 

Approaching the airfield from the north, Flight 191 and its 163 souls aboard entered a heavy thunderstorm. "Tower, Delta 191 Heavy, out here in the rain, feels good," the captain said in one of his last transmissions to air traffic control. 

Rain pelted the aircraft as it made its final approach. Just under 1,000 feet above the ground, a sudden wind shift reduced the flight's forward speed, prompting the flight crew to spool up the engines and attempt a go-around.

The last-minute effort didn't work. Flight 191 came down in a field about a mile short of the runway, skidding across a highway before disintegrating in a fireball in a wreck that killed 135 people.

Regulations are written in blood, the old saying goes. So are safety systems.

Commercial airline safety has advanced to the point where fatal crashes are exceptionally rare. The January 2025 crash of a regional jet into the Potomac River was the United States' first deadly commercial accident in almost 14 years, an unprecedented stretch in aviation history.

Many of the systems and procedures that safely guide nearly 10 million scheduled passenger flights across the United States each year are in place today because of horrible tragedies like Flight 191 back in 1985.

We know now that microbursts are a deadly hazard to aircraft during takeoff and landing. A microburst is a sudden wind that blows downward out of the base of a thunderstorm. Winds in a microburst spread out when they impact the ground to create intense and localized wind shear.

If an airplane flies through a microburst, the sudden wind shift can cause a critical loss of airspeed that may result in a stall and eventual crash. This is what triggered the crash sequence of Flight 191.

Dr. Theodore Fujita, inventor of the eponymous tornado rating scale, didn't limit his studies to tornadoes. After the microburst-induced 1975 crash of Eastern Airlines Flight 66 at New York's JFK Airport, Dr. Fujita teamed up with scientists at the National Centers for Atmospheric Research (NCAR) to intensely study the processes behind microbursts. 

The team's findings directly contributed to the safety of the global airline industry. Airlines initially resisted, but the tragedy in Dallas was the final straw that prompted major changes.

Soon after, scientists and engineers developed onboard radar systems capable of detecting low-level wind shear like the type produced by a microburst. This information can help pilots quickly respond to rapid weather changes and keep the aircraft safe.

Studying microbursts may sound like dry turkey to people who aren't interested in meteorology. But Fujita's endeavor with NCAR has directly saved countless lives, potentially including yours, in the decades since their groundbreaking research. 

NCAR is a driving force behind meteorological research and discovery. Scientists who work for the organization are key in developing the science of meteorology, the study of Earth's climate, and numerous other scientific fields on our planet and beyond.

Just this year, high-level press releases from NCAR touted:
  • studies in advanced weather models to improve forecast accuracy and range
  • the formation of hailstones
  • the mechanisms behind turbulence
  • atmospheric rivers that drench the West Coast
  • the structural impacts of freezing rain
  • rainfall trends that can affect the very crops that feed our country
...and those don't come close to including all the research occurring behind the scenes.

The Trump administration announced this week that they plan to dismantle NCAR, accusing the entity of being a vehicle for "climate alarmism." 

Officials with NCAR released a short, cautious statement regarding the announcement.
NSF NCAR’s research is crucial for building American prosperity by protecting lives and property, supporting the economy, and strengthening national security. Any plans to dismantle NSF NCAR would set back our nation’s ability to predict, prepare for, and respond to severe weather and other natural disasters.

For an overview of how our research benefits the nation, visit our Research Works website
Tuesday's announcement was met with widespread shock and condemnation throughout the weather community, even from traditionally conservative voices who generally support the Trump's administration's slash-and-burn practices.

The administration's desire to fragment and squash weather and climate research was telegraphed long before the president won his second term.

Project 2025, the blueprint off of which Trump's team is working to reshape American society, very clearly outlined its vision for the future of weather forecasting and research [see pages 674 and 675].

The plan explicitly calls to "break up NOAA," going on to state:
NOAA consists of six main offices. [...] Together, these form a colossal operation that has become one of the main drivers of the climate change alarm industry and, as such, is harmful to future U.S. prosperity. This industry’s mission emphasis on prediction and management seems designed around the fatal conceit of planning for the unplannable. That is not to say NOAA is useless, but its current organization corrupts its useful functions. It should be broken up and downsized.
The document also calls for the full and complete privatization of the National Weather Service, handing over its duties to companies such as AccuWeather: 
The NWS provides data the private companies use and should focus on its data-gathering services. Because private companies rely on these data, the NWS should fully commercialize its forecasting operations.
Trump's team has radically transformed the federal government over the past year, from pushing out hundreds of thousands of employees to completely shutting down entire agencies.

But we shouldn't treat the destruction of NCAR as a fait accompli.

This administration has backed down in the face of strong and persistent opposition. Cracks in steadfast support of the White House are also beginning to show among the Republican majorities in Congress, especially as the president's approval ratings sink toward all-time lows

Contact your representatives and senators and urge them to oppose the administration's plan to dismantle NCAR, NOAA, and the National Weather Service. Raise awareness about the issue with your family and friends so they can do the same.

Weather affects us all. We don't know how good we have it compared to just a few generations ago. Advancing the science of meteorology isn't liberal or conservative, it's common sense. Fight for your forecast--and the research that makes it possible.

[Flight 191 wreckage photo via NTSB/Wikimedia Commons] 


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December 10, 2025

A few spots in the U.S. are running ahead of snow averages as we hid mid-December


It's been a strong start to winter for a large chunk of the eastern United States as repeated intrusions of Arctic air dip across the region.

Temperatures for many areas have been running significantly behind normal since around Thanksgiving, providing plenty of opportunities for ample snow when a moisture-laden system develops. 


A quick look at the National Weather Service's seasonal snowfall analysis through this morning (December 10) shows that a significant chunk of the contiguous United States has already seen some accumulating snow so far this season. "Accumulating snow" counts as at least 0.1 inches or more. 

Aside from the West Coast, the Southeast, and random counties on the Plains, the most conspicuous clear spot exists from southern New Jersey up the coast through Cape Cod.

Atlantic City, New York's Central Park, and Boston's Logan Airport have all only reported a "trace" of snow this year, which means that it snowed but didn't stick to the ground. 


We've been seeing the snow come down elsewhere. Persistent bursts of cool air moving over the relatively warm lakes have switched on the lake-effect snow machine for the traditional snowbelt communities downwind from the Great Lakes.

Several major winter storms have also traversed the Midwest and Great Lakes, which have padded seasonal snowfall totals throughout the region.

Chicago's O'Hare Airport has picked up 17.2 inches of snow this season, which far outpaces the 4.2 inches you'd expect to see by December 10th. Detroit has seen 10.9 inches of snow, going above and beyond the 4.1 inches they'd normally pick up through this point in the season.

This year's favorable pattern for snow in the east is due in large part to ridges of high pressure setting up over the western half of North America. We can see this pattern reflected in the region's seasonal snowfall totals.

Colorado Springs has only seen 5.2 inches of snow this year, which is down from their typical 8.4 inches by this point in December. Folks in Boise have only seen a mere dusting of snow when they'd normally have seen 3.5 inches by now.


The latest forecast from the Climate Prediction Center continues to show below-average temperatures favored across the Upper Midwest and the Great Lakes, which could further add to the region's snowfall totals, with above-average temperatures dominating much of the rest of the U.S. through the end of the month.


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November 27, 2025

The Midwest's first widespread winter storm arrives this weekend


Get ready for a hefty blanket of snow across much of the Midwest this weekend as a moisture-rich winter storm develops and sweeps through the region.

We'll see the low-pressure system begin to develop over Colorado late on Friday and move east through the weekend. 

Expect precipitation to begin in places like Iowa and Missouri during the overnight hours Friday into early Saturday. Snowfall will expand east toward the Great Lakes and cover the region through the day Saturday, lasting overnight into early Sunday before tapering off from west to east. 

Forecasters with the National Weather Service anticipate some pretty hefty totals across the region. The latest forecast on Thursday afternoon paints 8 to 10 inches of snow from western Iowa through western Michigan, including the cities of Des Moines, Chicago, and Milwaukee. Much of central/eastern Iowa and northwestern Illinois could see a foot or more of snow by Sunday morning.

Plan ahead if you're travelling this weekend. The timing of this storm is atrocious given that there are so many folks heading back home from their Thanksgiving trips.

Highway travel will be difficult or impossible during the height of the storm throughout the affected areas. Widespread airline delays and cancellations are also likely. Chicago is a major airline hub, so delays and cancellations there will also have a ripple effect to parts of the country not experiencing active weather this weekend. 


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November 12, 2025

Atmospheric river threatens several inches of rain across California


A potent system approaching the West Coast will produce ample rainfall across most of California over the next couple of days, with the highest mountain peaks in the Sierra potentially in line for up to two feet of snow.

Forecasters are watching a sharp trough digging through the eastern Pacific Ocean to end this week. Precipitation will begin washing into northern California and the Bay Area through the first half of Thursday, gradually spreading south and east into the day.

Rain will reach southern California by early Friday morning, with sustained precipitation streaming across the region straight through Saturday and likely into the first half of Sunday.

This system will coat every square inch of California in at least some rainfall, with the bulk of the state's population expecting at least one inch of rain through this weekend. 


Many areas will see much higher totals. 1-2 inches of rain is in the cards for most of the Central Valley, with higher totals in the Sierra foothills. The mountains proper could see up to 5 inches of precipitation, some of which will fall as snow above 8,500 feet or so.

Los Angeles could see 3-4 inches of rain by the end of the weekend. For some context, the weather station in downtown Los Angeles only averages 0.78 inches of rain in a typical November, and the site averages 14.25 inches of rain each year.


Unsurprisingly, there's a widespread risk for flooding. A flash flood watch is in effect from Yosemite Valley down to the San Emigdio Mountains south of Bakersfield, with additional flash flood watches likely throughout southern California in the coming days.

Excessive runoff from heavy rainfall could cause rivers and streams to quickly rise. Flash flooding and landslides are especially possible on and around burn scars.


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October 27, 2025

Hurricane Melissa reaches Category 5 intensity, setting new records


Hurricane Melissa intensified into a scale-topping Category 5 storm just south of Jamaica early Monday morning. Forecasters expect the storm to remain near peak strength as it begins to curve north and makes landfall on the island nation within the next 24-36 hours.

Melissa achieved this rare feat by taking advantage of favorable atmospheric conditions and exceptionally warm water temperatures throughout the northern Caribbean Sea. This is the only storm to track through the Caribbean so far this year.

This is the third Category 5 hurricane this year. Only one other Atlantic season has recorded more than two Category 5 storms—2005, which saw four scale-toppers in Emily, Katrina, Rita, and Wilma.

This is the seventh Category 5 storm we've seen in the past three years, a historic stretch since records began back in 1850.

This is the thirteenth Category 5 storm in the past decade, also a historic stretch since reliable records began.

Melissa is also on track to become the strongest storm to ever strike Jamaica. The previous recordholder is 1988's Hurricane Gilbert, which made landfall near Kingston with 130 mph winds.


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October 26, 2025

Devastating flooding, wind damage expected as Hurricane Melissa targets Jamaica


Hurricane Melissa rapidly intensified from a tropical storm to a Category 4 hurricane in about 24 hours as the system churns over the extremely warm waters of the northern Caribbean Sea.

The storm, which is just south of Jamaica, will slowly move over the island nation over the next couple of days. Widespread and potentially catastrophic flash flooding and mudslides are likely, along with devastating wind damage and a destructive coastal storm surge.

Widespread Damage Likely

Ask any meteorologist their worst-case scenario for a high-end landfalling hurricane and a situation like Hurricane Melissa will probably rank high up on the list. 


Melissa is about as strong as an Atlantic hurricane can get and it's moving at a snail's pace toward Jamaica, a heavily mountainous island that's home to millions of people.

Whether the storm reaches Jamaica as a Category 4 or a Category 5 on Monday and Tuesday, the effects will be devastating for the region.

A constant surge of tropical moisture streaming across the heavily mountainous island will produce rainfall totals of 20-30 inches, with some communities possibly picking up more than 40 inches of rain through Tuesday night. 


This absolute glut of water will lead to widespread and potentially catastrophic flash flooding and mudslides; think about what happened in western North Carolina during Helene last year, and double it several times over. 

Extreme, long-duration winds will destroy many homes and businesses along the path of the eyewall. Utility outages will likely last for months in the hardest-hit areas. Trees will be defoliated and vast swaths of cropland will be destroyed.

The NHC says a storm surge of 9 to 13 feet is possible as Melissa makes landfall, an inundation of seawater that will cause major damage to coastal communities east of where the eye makes landfall.

After crossing Jamaica, the hurricane will pass over eastern Cuba with flash flooding and wind damage. Melissa will begin accelerating to the northeast from there, potentially threatening Bermuda at hurricane strength later this week.

A season of high-end hurricanes


As I wrote last week, this has been a very strange hurricane season. This year's activity has been all-or-nothing, with storms that either struggled mightily or just reached for the stars.

We've had five hurricanes this year:
  • Erin: Category 5, 160 mph peak
  • Gabrielle: Category 4, 140 mph peak
  • Humberto: Category 5, 160 mph peak
  • Imelda: Category 2, 100 mph peak
  • Melissa, Category 4, 140 mph peak (so far)
Since 1850, only one other Atlantic hurricane season has recorded more than two Category 5 storms. (The other was 2005 with Emily, Katrina, Rita, and Wilma.)


Extremely warm waters and favorable atmospheric conditions allowed Melissa to undergo a period of explosive intensification between Saturday and Sunday, growing from a tropical storm to a Category 4 hurricane in just 24 hours. 


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October 21, 2025

Tropical Storm Melissa may threaten the Greater Antilles as a hurricane


Tropical Storm Melissa formed in the Caribbean Sea on Tuesday morning. A weak pattern around the storm will force it to meander toward Haiti and Jamaica over the next few days, where it could pose a major threat for flash flooding and landslides.

Melissa developed from a vigorous tropical wave that took its time traversing the Atlantic Ocean over the past week or so.


It's a disheveled storm this afternoon, with the low-level center of circulation displaced from its thunderstorm activity to the east. This disorganization will prevent it from strengthening much in the short term.

While the storm is facing some disruptive wind shear right now, steering currents around the storm will collapse later this week. As a result, Melissa will slow to a crawl as it approaches the Greater Antilles. This slow and somewhat erratic movement means that the storm's future track is more uncertain than usual. 

A hurricane watch is in effect for Haiti's Tiburon Peninsula (full disclosure: I had to google the name for that), while a tropical storm watch is in effect for all of Jamaica. 

Extensive flash flooding and landslides are possible on top of the gusty winds as the storm slowly moves through the region. 


Water temperatures across the Caribbean are very warm for mid-October. Melissa is the region's first tropical system this year, shutting out the possibility of no tropical systems in the Caribbean for the first time since 1997.

The strong winds of tropical storms and hurricanes churn up the ocean surface and induce upwelling of cold waters. Caribbean waters haven't really had the opportunity to overturn, so to speak, given the lack of tropical systems so far this year.

It's worth noting that a slow-moving storm getting its act together over steamy ocean waters can lead to more strengthening than anticipated.

[Satellite image courtesy of NOAA.]


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October 12, 2025

Checking in on the strange 2025 Atlantic hurricane season


We're more than halfway done with this year's Atlantic hurricane season and...well, it's been a weird one so far.

The ocean basin has produced 11 named storms through Oct. 12. This year's storms have pretty neatly fallen into two groups so far—they've either struggled mightily, or absolutely reached for the stars. 

Out of those 11 named storms, four grew into hurricanes. Erin and Humberto reached category five intensity, Gabrielle was a solid category four, and Imelda reached category two strength.


A favorable atmospheric setup has kept all but one of those storms away from the continental United States. Tropical Storm Chantal made landfall in South Carolina with 60 mph winds during the overnight hours on Sunday, July 6. Otherwise, nine out of the ten remaining storms recurved out into the open Atlantic.

We haven't even seen any tropical systems in the Caribbean by this point in the season, a testament to the strength and placement of ridges of high pressure over the central Atlantic. If these ridges were stronger or farther west, the waves that grew into storms like Erin and Humberto may have travelled farther south into the Caribbean instead.

How does this season stack up compared to normal?


An average Atlantic hurricane season produced 14 named storms, seven hurricanes, and three major hurricanes. We're pretty much on track to see a near-normal season, assuming we see another storm or two over the next couple of weeks. 

Even this year's Accumulated Cyclone Energy (ACE) is near normal. ACE is a metric meteorologists use to gauge the true intensity of a hurricane season, accounting for the strength and longevity of a season's storms. A stronger storm that lasts longer will produce higher ACE values than a weak, short-lived system.

So far this season, we've seen an ACE value of 96.2, which was 92.4% of normal for Oct. 11. Erin, Humberto, and Gabrielle account for more than 80% of that energy, which really throws it back to how every storm this season has either struggled or excelled.

The season isn't over yet. Hurricane season runs through Nov. 30, and we've seen plenty of high-end storms form through the end of October and into November. We'll have to start looking closer to home—in the Caribbean and Gulf of Mexico—for storm formation as we enter these final weeks of the season. 


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