Severe Storm Outlook Narrative (AC)
Issued by NWS

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ACUS03 KWNS 280724
SWODY3
SPC AC 280723

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0223 AM CDT TUE APR 28 2015

VALID 301200Z - 011200Z

...NO SVR TSTM AREAS FORECAST...

...SUMMARY...
ISOLATED THUNDERSTORMS ARE EXPECTED ACROSS THE CENTRAL APPALACHIAN
REGION AND OVER PARTS OF THE CENTRAL ROCKIES/HIGH PLAINS.

...CENTRAL APPALACHIAN REGION...

SECONDARY MID-LEVEL SPEED MAX WILL DIG SEWD INTO THE TN VALLEY AND
ASSOCIATED LOW WILL SETTLE INTO THE OH VALLEY BY 01/00Z.  NAM IS
FASTER DIGGING THIS SYSTEM THAN THE GFS BUT TIMING APPEARS FAVORABLE
IN BOTH MODELS FOR DIURNAL CONVECTION BENEATH COLD POCKET ALOFT.
WHILE BOUNDARY LAYER MOISTURE WILL BE LIMITED SUFFICIENT BUOYANCY
SHOULD BE PRESENT FOR ISOLATED CONVECTION CAPABLE OF PENETRATING
LEVELS NECESSARY FOR LIGHTNING.

...CENTRAL ROCKIES/HIGH PLAINS...

PROGRESSIVE SHORT-WAVE TROUGH WILL ADVANCE ACROSS THE NRN ROCKIES
THURSDAY AND ASSOCIATED SFC FRONT IS EXPECTED TO AID CONVECTIVE
DEVELOPMENT...ESPECIALLY DURING THE AFTERNOON HOURS.  WEAK BUOYANCY
BUT STEEP LAPSE RATES SHOULD RESULT IN ISOLATED THUNDERSTORMS FROM
NEAR THE BLACK HILLS REGION OF SD...SWWD INTO PARTS OF THE GREAT
BASIN.

..DARROW.. 04/28/2015




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