SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1200 AM CDT Fri Apr 08 2022
Valid 091200Z - 101200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not forecast across the contiguous United
States on Saturday.
...Synopsis and Discussion...
A large-scale upper trough will be present over much of the eastern
CONUS on Saturday. This feature and multiple embedded shortwave
troughs are expected to move generally east-northeastward across the
East Coast and adjacent western Atlantic through the period. A
prior surface cold front passage will shunt appreciable low-level
moisture offshore.
Instability is forecast to remain quite modest ahead of a weak
surface low that should develop from NY across New England and into
Canada. Still, very cold mid-level temperatures (around -30C at 500
mb) may aid in sufficient instability to support isolated lightning
flashes with any thunderstorms that can form over NY during the day
and then spread into parts of New England. Other sporadic lightning
flashes may be noted over WV and vicinity.
Farther west, another upper trough will dig over the Pacific
Northwest and northern/central Rockies through Saturday evening.
Even though low-level moisture will remain scant over WY/CO, enough
mid-level cooling may occur ahead of the approaching upper trough to
support weak instability. High-based convection that initially forms
over the higher terrain may be capable of producing occasional
lightning flashes as it spreads eastward across the adjacent High
Plains through Saturday evening.
..Gleason.. 04/08/2022
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