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
000
ACUS03 KWNS 300826
SWODY3
SPC AC 300824

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0224 AM CST FRI JAN 30 2015

VALID 011200Z - 021200Z

...NO SVR TSTM AREAS FORECAST...

...SUMMARY...
NUMEROUS SHOWERS AND A FEW THUNDERSTORMS WILL LIKELY OCCUR FROM A
PORTION OF SOUTHERN TEXAS THROUGH SOUTHERN PORTIONS OF THE GULF
COAST STATES.

...SYNOPSIS...

A SPLIT FLOW REGIME WILL PERSIST SUNDAY WITH A NRN STREAM TROUGH
EXPECTED TO AMPLIFY THROUGH THE CENTRAL PLAINS TO THE MID MS AND TN
VALLEYS. CONCURRENTLY...A SRN STREAM POSITIVE TILT TROUGH WILL MOVE
SLOWLY SEWD THROUGH THE BAJA AREA AND NORTHERN MEXICO. THE NRN
STREAM UPPER TROUGH WILL BE ACCOMPANIED BY A COLD FRONT THAT WILL
ADVANCE SEWD THROUGH TX AND THE SERN STATES. BY THE END OF THE
PERIOD THIS FRONT SHOULD EXTEND FROM A SFC LOW OVER THE MID-ATLANTIC
AREA SWWD THROUGH THE NRN GULF.

...CNTRL AND SRN TX THROUGH SRN PORTIONS OF THE GULF COAST STATES...


A BROAD FETCH OF SWLY FLOW ALOFT WILL EXIST FROM SRN TX THROUGH THE
SERN STATES AND UPPER WINDS WILL STRENGTHEN IN ASSOCIATION WITH THE
AMPLIFYING NRN STREAM TROUGH. MODIFIED CP AIR WITH UPPER 50S TO 60 F
LOW-LEVEL DEWPOINTS SHOULD ADVECT INLAND THROUGH SERN TX INTO SRN
PORTIONS OF THE GULF COAST STATES. INSTABILITY WILL REMAIN WEAK
OWING TO THE MODEST MOISTURE RETURN...POOR 700-500 MB LAPSE RATES
AND AREAS OF WIDESPREAD CLOUDS. A PLUME OF SUBTROPICAL MOISTURE AND
A SERIES OF IMPULSES EMBEDDED WITHIN THIS BELT OF SWLY WINDS ALOFT
WILL PROMOTE THE DEVELOPMENT OF NUMEROUS SHOWERS AND A FEW
THUNDERSTORMS ALONG AND AHEAD OF THE SEWD ADVANCING COLD FRONT.
WHILE WINDS ALOFT AND VERTICAL SHEAR WILL STRENGTHEN /PARTICULARLY
FROM THE LOWER MS VALLEY INTO THE SERN U.S./ IN ASSOCIATION WITH THE
AMPLIFYING NRN STREAM TROUGH...THE THERMODYNAMIC ENVIRONMENT IS
EXPECTED TO REMAIN TOO MARGINAL FOR A SEVERE STORM THREAT.

..DIAL.. 01/30/2015



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