578 

ACUS01 KWNS 201602

SWODY1

SPC AC 201601



Day 1 Convective Outlook  

NWS Storm Prediction Center Norman OK

1101 AM CDT Wed May 20 2026



Valid 201630Z - 211200Z



...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM WEST VIRGINIA

INTO THE MID-ATLANTIC STATES AND SOUTHERN NEW ENGLAND...AND OVER

PORTIONS OF SOUTHWEST TEXAS....



...SUMMARY...

Scattered severe/damaging winds and isolated hail will be possible

with thunderstorms from the central Appalachians into the

Mid-Atlantic and southern New England this afternoon and evening.

Severe thunderstorms with large hail and isolated severe gusts may

also occur today across parts of west/south-central Texas.



...WV to Southern New England...

A broad upper ridge is present today over the southeastern U.S.,

with the southern fringe of stronger westerlies extending from the

OH Valley into the Mid-Atlantic region.  Visible satellite imagery

shows a zone of relatively clear skies from KY/WV into southeast

PA/NJ and southern New England.  Strong heating in this corridor

will lead to moderate CAPE by mid-afternoon.  Scattered thunderstorm

development is expected, with steep low-level lapse rates and

sufficient westerly flow above the boundary-layer supporting a risk

of damaging wind gusts and some hail in the strongest

cores/clusters.



...Southwest TX...

Water vapor imagery shows a southern stream shortwave trough moving

into northwest Mexico, with large scale ascent approaching west TX. 

Considerable cloud cover will persist in this region today, limiting

heating/destabilization.  Easterly low-level upslope flow will aid

in the development of afternoon thunderstorms over the Davis

mountains, with storms spreading slowly eastward through the

evening.  A few severe storms are possible, capable of large hail

and gusty/damaging winds.



..Hart/Dean.. 05/20/2026



$$