WEATHERAmerica Newsletter, Sunday, June 7, 2026; SHORT And MEDIUM RANGE OUTLOOKS

[Larry Cosgrove]

SHORT RANGE OUTLOOK

(Through The Next 72 Hours)

 

Thunderstorms Slowly Giving Way To Heat Ridges Across the U.S.

METEOBLUE

PivotalWeather.Com (3)

ECMWF

College Of DuPage Weather Laboratory

The large storm and frontal structure over the Mississippi Valley may look impressive on satellite, but most model guidance shows this system lifting and minoring out through the lower Great Lakes and St. Lawrence Valley during the near term. Heat ridging in the Southwest and along the Eastern Seaboard will then expand. The reduction of cloud cover and precipitation threats should mean a jump in temperature, most prominently from Texas and the Great Plains and along the Interstate 95 corridor. High surface relative humidity will be a factor in cooling demand in many locations. The Saharan Air Layer may also edge into the Gulf and Atlantic coastlines, which would act as a deterrent to thunderstorm formation. That also implies that any disturbances over the Strait of Yucatan may not attain a circulation, and probably stall over far western Cuba.

 

MEDIUM RANGE OUTLOOK

(Four To Ten Days From Now)

 

Strong Cold Front Moves From Pacific Northwest To The Great Lakes, Midwest; Major Thunderstorm Event The Likely Result

METEOBLUE

UQAM Meteocentre (4)

WeatherBELL (4)

TrueWx.Com (4)

College Of DuPage Weather Laboratory

Besides the heavy rain threat in western Cuba and possibly the Florida Keys, real problems may result from the cold upper trough that is now moving through the Gulf of Alaska. This feature will almost certainly move over top of the heat ridge taking shape across California. In addition to the trough, a shortwave will follow from British Columbia into Colorado and Nebraska by June 15-16. If so, another round of severe weather and torrential rain is possible through the Missouri Valley, then settling into a prolonged MCS event over KS, OK, AR, and MO at mid-month. There will be a major cooling from the Front Range into the Ozark Plateau, but hot air may hold across Texas, the Deep South and Eastern Seaboard since heat ridging will hold. It may take until the 11-15 day time frame for the cP air mass to reach past the Appalachian Mountains (as the Bermuda High is pushed eastward).