US Extended Forecast thru May 1

...A Stormy And Amplified / Blocky Late April Pattern...

...Pattern Overview And Weather Highlights/Threats...

A Major Cooling/Unsettling Mid-Upper Level Rockies/Plains Trough
And Deep Lead Cyclogenesis Sun/Mon Sets The Stage For A Spring
N-Central Rockies/High Plains Snow Threat In A Cooled Airmass
Wrapped Back From The Nrn Half Of The Central And Ern Us.

Spc Also Shows Multi-Day Severe Weather Potential In A Well Defined
Warm Sector Over The S-Central Plains/Ms Valley Into Sun/Mon
Including A Strong Tornado Threat.

The Closed Trough/Low And Well Organized Surface System Should
Subsequently Be Forced Gradually Eastward Across The East-Central
Us Tue-Thu Days 5-7 In A Developing Rex Block Setup As Warming
Ridges Build Strongly Upstream Over The Wrn Us And Overtop Over
S-Central Canada. This Occurs As A Lead Nern Us/Canadian Maritime Closed Low Loses Influence.

Slow/Wrapped System Translation And Increasingly Deep Moisture Influx From The Gulf Of Mexico Then Wrn Atlantic Will Fuel A Widespread Convective And Overrunning Heavy To Excessive Rainfall Threat Spreading Slowly Across The East-Central To Ern Us As Depicted On Recent/Upcoming Wpc Medium Range Days 4-7 Qpf Progs...

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