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WEATHERAmerica Newsletter; WEATHER EXTREMES And GLOBAL SATELLITE IMAGERY; Saturday; February 1, 2025

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Larry Cosgrove

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Feb 1, 2025, 10:43:35 PMFeb 1
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TODAY'S FUN LINKS:

Getting to Know You: AMS President David J. Stensrud

The Front Page - 12 January 2025

A professor of meteorology at The Pennsylvania State University, Stensrud took up his post as AMS President this month at the 105th AMS Annual Meeting in New Orleans.

How Climate Change Worsened the Most Destructive Wildfires in L.A. History

(may require subscription)

Los Angeles Times - 16 January 2025

In the mix of conditions that have contributed to the fires, scientists say one significant ingredient is human-caused climate change.

Ocean-Surface Warming Four Times Faster Now than Late 1980s

University of Reading - 28 January 2025

New research finds that ocean temperatures are now increasing at 0.27°C per decade, compared to about 0.06°C per decade in the late 1980s.

Light, Fluffy Flakes or Wet, Weighty Slush: What the Snow Ratio Means for Your Forecast

Weather Underground - 21 January 2025

Determining the snow ratio plays an important role in creating the forecast for a winter storm.

Severe Weather and Major Power Outages Increasingly Coincide across the U.S.

Columbia University - 22 January 2025

An understanding of the relationship between severe weather and power outages in our changing climate will be critical for hazard response plans, according to a new study.

How Climate Change Is Complicating a Beloved Midwest Pastime: Ice Fishing

(may require subscription)

Inside Climate News - 15 January 2025

Wide temperature swings in Wisconsin and Minnesota have delayed the formation of ice thick enough to support anglers and other outdoor recreationists.

"PDS" Warnings Were Made to Grab Attention in Tornadoes, Hurricanes, and Now Wildfires

Associated Press - 13 January 2025

The "Particularly Dangerous Situation" is a rare alert first used to warn of tornado outbreaks in the Midwest.

How a Lack of Rainfall in Arizona Is Forcing Some Ranchers to Adjust

AZFamily - 6 January 2025

A dry start to the new year, following a very dry 2024, is causing issues for businesses relying on the rain.

 

Extreme Supersonic Winds Measured on Planet Outside Our Solar System

European Southern Observatory - 21 January 2025

Reaching speeds up to 33,000 kilometers per hour, the winds pummeling the equator of WASP-127b, a giant exoplanet, make up the fastest jet stream of its kind ever measured on a planet.

Scientists Discover Unique Microbes in Amazonian Peatlands that Could Influence Climate Change

Arizona State University - 23 January 2025

The new research shows that the microbes have a dual role in the carbon cycle and can either stabilize carbon for long-term storage or release it into the atmosphere as greenhouse gases.

 
WEATHER HAZARDS (During The Next 24 Hours)
 
SEVERE WEATHER OUTLOOK
(potential for tornadoes, damaging winds, and large hail within the next 24 hours)
 
Scattered Locations In
MT....WY....ID....SE BC
(Strong Winds; Pressure Gradient Derived; Orographic Influences)
 
HEAVY RAINFALL OUTLOOK
(potential for an inch or more total rainfall within the next 24 hours)
 
Isolated Locations In
N, C CA
(QPF 1 - 2")
 
WINTER WEATHER POTENTIAL
(potential for Moderate Icing, Snow 2 - 4" or more, and/or temperatures below 10 deg F)
 
Scattered Locations In
N AB....N, C MB....W, N ON
(Snow; 4 - 8")

Numerous Locations In
BC....AB....SK....MB....W, N ON....N, C QC....NL
(Intense Cold)

Isolated Locations In
C, E ON....SW QC....N, W NY....NW PA
(Snow; 4 - 8")

Scattered Locations In
S BC....WA....OR....N, C CA....Far N NV....ID....WY....S ND....MT....SW SK....S AB
(Snow; Blizzard; Mostly Above 3000 Feet; 4 - 24")

GLOBAL WEATHER SUMMARY
(a review of important weather features around the world)
 
IODC
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ECMWF; METEOBLUE; EUMETSAT
 
You know, they say it can be a bad thing when a strong, broad subtropical jet stream interacts with a formative cA vortex. They might just be right....

If you look at energy in central Europe digging southeastward, and a vivid southern branch wind field, moisture laden, progressing form the Sahel and central Sahara Desert toward the Middle East, you get an unsettling feeling that some winter weather extremes may occur in the Levant, Persia, and Indus River watershed. The mean storm track at surface will probably be from the Sinai Peninsula into the Persian Gulf, then on into western India. If you look at precipitation maps, the freeze line and snow/ice transition drop very low in latitude (eg. snow may fall south of the Zagros next weekend). The presence of a string blocking high in Siberia is also important, because it will force southward transfer of a shortwave from the Danube Valley into the Caucasus and northern Persia, If the European scheme is correct, it will not warm up  until the last week of February in southwestern Asia.
 
HIMAWARI 8
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METEOBLUE; Kochi University
 
Just to be clear about something, the Madden-Julian Oscillation is not in position or organization to be a constant cold source for North America. If the convective clustering shifts into Phases 6,7, 8, and/or 1, and connects with the polar westerlies, then greater chances for cAk drainage will  happen in both eastern Asia and central/eastern North America.

Very hot and dry conditions are seen in Australia. But the subcontinent is buffeted by tropical cyclone development on its northeast shore and to its west over the Indian Ocean. A frontal structure, meanwhile, has cleared New Zealand.
 
GOES WEST
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NOAA/NESDIS
 
The twin demons of cold and storminess are on view on this image. The storm complex over the Gulf of Alaska will progress through the Pacific Northwest and southern Canada during the next five days. Snow impacts from British Columbia through the Intermountain Region will be tremendous, accompanied by strong winds that will be accented by orographic enhancement and convection as the low pressure slides along just below the International Border. Arctic air associated with a developing cAk vortex will conjoin with the general spread of tundra type air across the Prairie Provinces. This may be a repetitive process that, if the numerical models and analogs with previous years are correct, may prevail through much of February and March along and above the Interstate 80 and 90 corridors.
 
GOES EAST
image.png
NOAA/NESDIS
 
The storm track scenario in North America is from the Pacific Northwest to New England and the Maritime Provinces. Potential for heavy snow and bitter cold will occur along and north of the pathway, while mild to occasionally warm conditions are probable to the south.

Summer in South America features the most intense heat over Chile and Argentina. Further north, over Brazil and especially along the Amazon River watershed, frequent and heavy diurnal thunderstorms are seen. Note also the tropical wave approaching Recife Brazil.
 
METEOSAT
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ECMWF; METEOBLUE; EUMETSAT
 
Europe has fallen into a somewhat segmented pattern with a more amplified upper air pattern that somewhat resembles that of spring. The most defined ridges are likely to be set up in France and Germany. Another anticyclone, a blocking signature, may prove quite durable over the Ural Range in Russia by next weekend. There are small disturbances moving through the Mediterranean countries which may greatly impact Turkey, the Caucasus, and the Middle East by the second week of this month.

Curiously, a vigorous subtropical jet stream is progressing across northern Africa. There is full linkage with equatorial moisture, a rarity in winter. When this dewpoint increase hits one of the storms moving into the Levant around February 8 - 9, risks for heavy precipitation will increase greatly. Much of southern Africa is very hot with high surface relative humidities but no real chance for rainfall.
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