RSS Mesoscale Discussions from Storm Prediction Center
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1118 PM CDT Sun Apr 19 2026
Valid 201200Z - 211200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe storms are not expected today.
...Synopsis...
An upper trough will exit the northeastern states today, with
northwest flow aloft extending from the northern Plains to the East
Coast. Upper ridging will occur over the Rockies, while a large
upper trough slowly approaches the West Coast.
At the surface, high pressure will result in relatively stable
conditions for much of the central and eastern CONUS, with centers
over the Mid Atlantic and near the northern Gulf Coast.
In the wake of the eastern trough, winds just off the surface will
maintain a zone of elevated moisture and instability over much of
TX, where scattered showers and storms will be most likely. Weak
instability will preclude any severe storm chances there.
To the west, cooling aloft with the approaching upper trough will
support weak instability into parts of OR and WA, with isolated late
day thunderstorms possible over portions of the Cascades.
Small/non-severe hail cannot be ruled out, along with locally gusty
winds mainly in the 00-03Z time frame.
..Jewell/Chalmers.. 04/20/2026
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