Severe Storm Outlook Narrative (AC)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
000
ACUS01 KWNS 250536
SWODY1
SPC AC 250534

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1234 AM CDT Wed Apr 25 2018

Valid 251200Z - 261200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ALONG THE LOWER
RIO GRANDE VALLEY...

...SUMMARY...
Isolated strong/severe thunderstorms may affect the lower/middle Rio
Grande Valley region of south Texas, and perhaps into parts of
central Texas.

...Synopsis and Discussion...
A compact shortwave trough will move from the central Plains toward
the Lower MS Valley, embedded within a larger-scale cyclonic flow
regime across eastern North America. High pressure will build
southward across the High Plains with a leading cold front
approaching the Rio Grand Valley by late afternoon.

A plume of 60s F dewpoints will exist across south Texas, maintained
by light southeasterly low-level winds. Storms are expected to form
during the afternoon across the river into Coahuila, and spread
toward the river valley during the evening. A few storms may cross
into the USA, with hail or wind possible.

To the north and east, other showers and thunderstorms will develop
along the front as it moves across north and central TX and toward
the lower MS Valley overnight. A storm or two may produce marginally
severe hail into central TX where elevated instability will be
maximized. Otherwise, non-severe storms will occur farther east.

..Jewell/Gleason.. 04/25/2018

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.