SPC Day 2 Thunderstorm Outlook Issued 0830Z 20040121

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ZCZC SPCSWODY2 ALL
ACUS02 KWNS 210745
SPC AC 210745

DAY 2 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
0145 AM CST WED JAN 21 2004

VALID 221200Z - 231200Z

GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM YUM 35 ENE BLH PRC
INW 60 SW GNT 35 NNW TCS 10 SW ELP.

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
A STRONG NRN STREAM SHORTWAVE TROUGH IS MOVING SEWD TOWARD THE UPPER
GREAT LAKES...AND THIS TROUGH WILL CONTINUE EWD OVER NEW ENGLAND BY
LATE TOMORROW. IN THE LOW LEVELS...A CONTINENTAL POLAR AIR MASS
WILL MAINTAIN COOL/DRY CONDITIONS ACROSS THE ERN CONUS.  FARTHER
W...A MID LEVEL TROUGH NOW OVER THE SRN GREAT BASIN/SRN CA WILL
EVOLVE INTO A CLOSED LOW AND DRIFT SWD TO THE NRN GULF OF CA AREA
TOMORROW.  STEEP LOW-MID LEVEL LAPSE RATES WILL ACCOMPANY THE MID
LEVEL COLD POOL...AND DAYTIME HEATING WILL CONTRIBUTE TO WEAK
INSTABILITY OVER SRN AZ AND ADJACENT AREAS OF NW MEXICO.  A FEW
THUNDERSTORMS WILL BE POSSIBLE TOMORROW ACROSS S CENTRAL AND SE AZ
IN THE REGION OF WEAK ASCENT AND RICHEST MID LEVEL MOISTURE N OF THE
MID LEVEL LOW.

A LOW-LEVEL WAA PATTERN WILL ALSO BECOME ESTABLISHED OVER S TX LATE
IN THE PERIOD. WHILE SOME DESTABILIZATION IS EXPECTED IN THE
850-500 MB LAYER...IT APPEARS THAT INSTABILITY WILL BE INSUFFICIENT
FOR ELEVATED THUNDERSTORMS.

..THOMPSON.. 01/21/2004

...NOTICE...
FOR USERS DECODING THE POINTS PARAGRAPH HEREIN...LATITUDE AND
LONGITUDE POINTS FOR THE CATEGORICAL AND PROBABILISTIC OUTLOOK
GRAPHICS ALSO ARE LOCATED IN A SEPARATE PRODUCT UNDER THE WMO
HEADINGS WUUS01 PTSDY1...WUUS02 PTSDY2...AND WUUS03 PTSDY3.  THE
INCLUSION OF POINTS IN THIS PRODUCT WILL EVENTUALLY BE DISCONTINUED.

$$