Severe Weather Outlook for May 4, 2011

This page has information on possible severe weather on Wednesday as provided by the National Weather Service Storm Prediction Center. You can also view outlooks for today and tomorrow. This map and discussion are updated early each morning.

Refer to the text discussion below the map for descriptions of possible severe weather threats.

Hazardous Weather Forecast Maps:

Severe Weather Discussion:

000
ACUS03 KWNS 010701
SWODY3
SPC AC 010700

DAY 3 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
0200 AM CDT SUN MAY 01 2011

VALID 031200Z - 041200Z

...SYNOPSIS/DISCUSSION...
A LOW WAVELENGTH UPPER TROUGH WILL MOVE FROM THE MS VALLEY EWD
ACROSS THE OH/TN VALLEYS DURING THE DAY AND TO THE ATLANTIC COAST BY
12Z WED. AHEAD OF THIS TROUGH...AN UPPER RIDGE AXIS WILL BE SHUNTED
OFFSHORE WHILE A SURFACE LOW PRESSURE TROUGH FORMS OVER CNTRL VA AND
THE CAROLINAS DURING THE AFTERNOON. MODIFIED LOW LEVEL MOISTURE WITH
DEWPOINTS MAINLY IN THE LOWER 60S F SHOULD STREAM NWD AHEAD OF A
COLD FRONT THAT WILL EXTEND ROUGHLY ALONG THE APPALACHIANS AT 00Z.
OVERALL INSTABILITY WILL BE WEAK...WITH MARGINAL DEEP LAYER SHEAR
DURING THE DAY.

OVERNIGHT...AS FORCING WITH THE UPPER TROUGH AND COLD FRONT PROGRESS
EWD...THUNDERSTORMS WILL BECOME MORE NUMEROUS BUT ANY INSTABILITY AT
THIS TIME SHOULD BE PURELY ELEVATED WITH SURFACE COOLING. DEEP LAYER
WINDS FIELDS WILL INCREASE AT THIS TIME BUT WIND POTENTIAL WILL BE
MITIGATED BY WEAK INSTABILITY AND TIME OF DAY. GIVEN THESE
FACTORS...WILL NOT INTRODUCE ANY LOW SEVERE PROBABILITIES AT THIS
TIME.

..JEWELL.. 05/01/2011