WEATHERAmerica Newsletter, Saturday, April 15, 2023; Near Term Forecast

[Larry Cosgrove]

SHORT RANGE OUTLOOK

(Through The Next 72 Hours)

 

Strengthening Upper Low, Trough Creates Chances For Thunderstorms Over  Eastern Third Of U.S.

METEOBLUE

UQAM Meteocentre (3)

University Of Wisconsin (3)

TwisterData.Com (3)

College Of DuPage Weather Laboratory (2)

Do not think for a minute that the storm which moves through the Great Lakes on Sunday is the last system that the U.S. must deal with this spring. There are more such disturbances and frontal structures waiting in the wings over the Pacific Basin. In fact, the fast approach of the next impulse may set up chances for severe weather in Texas and Oklahoma by the middle of the new week. The current system, meanwhile, is something of a double trouble type, with extensive heavy wet snow from parts of MN and WI into Ontario (wet snow, mind you), while still bringing risks for severe thunderstorms along the Mississippi River and points eastward during the next 48 hours. Because the 500MB cold pool is wrapped up tight with the surface low pressure, there may be strong winds involved. But I doubt that the colder values will reach farther south than the Corn Belt and Northeast. A quick rebound in temperatures seems likely in Texas and across Dixie in coming days.

Warmer West, Cooler East Alignment Likely By Midweek

METEOBLUE

PivotalWeather.Com (3)

ECMWF

With no input of air from above the Arctic Circle, we are settling into a typical pattern in spring where very warm days are followed by cool (not cold) periods. The system that is associated with the thunderstorm event in the Mississippi Valley will provide only minor cases of cold, and most of that would be at night. The snow generated in the cold sector of the cyclone (mostly Minnesota and Ontario) will melt quickly, and may accentuate the start of flooding around the north central states.