RSS Mesoscale Discussions from Storm Prediction Center
SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0743 AM CDT Sun Apr 19 2026
Valid 191300Z - 201200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not forecast today.
...Synopsis...
Water-vapor imagery this morning shows a large-scale upper trough
from James Bay southward through the Great Lakes and TN Valley. The
upper trough will continue to move east and reach the Lower Great
Lakes and East Coast by daybreak Monday. In the low levels, a cold
front will push east of the Carolina coast by early afternoon.
Surface high pressure will influence conditions across the central
and eastern states in wake of the cold front. Weak instability will
yield isolated thunderstorms over parts of the south Florida,
eastern North Carolina, and weak elevated storms over south Texas.
..Smith/Thompson.. 04/19/2026
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SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1059 AM CDT Sun Apr 19 2026
Valid 191630Z - 201200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not forecast today.
...Synopsis...
A shortwave trough currently approaching Baja California will
provide increasing large-scale forcing for ascent over Mexico and
south/west TX today. This will lead to scattered thunderstorms
through the period.
Other isolated afternoon thunderstorms are expected ahead of a
frontal band affecting New England and eastern NC, beneath cold air
aloft in the Lower Great Lakes region, and over south FL. In all of
these areas, weak instability and/or limited vertical shear will
preclude a risk of organized severe storms.
..Hart/Bunting.. 04/19/2026
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