SPC AC 071257
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0657 AM CST WED JAN 07 2004
VALID 071300Z - 081200Z.
...NO TSTM AREAS FORECAST...
...SW TEXAS...
SFC HIGH PRESSURE WILL BEGIN TO LOSE ITS INFLUENCE ON THE GREAT
PLAINS TODAY AS THE LARGE-UPPER TROUGH SHIFTS EWD AWAY FROM THE
CNTRL US. RETURN FLOW WILL SETUP BY THIS EVENING AS A LEE TROUGH
DEVELOPS ACROSS WEST TEXAS. AS A SHORTWAVE ORGANIZES ACROSS NRN
MEXICO TONIGHT...LIFTED INDICES SHOULD DECREASE TO NEAR ZERO IN THE
DEL RIO AREA. LARGE-SCALE ASCENT WILL ALSO INCREASE ACROSS THE MTNS
OF NRN MEXICO AND ISOLATED THUNDERSTORMS SHOULD DEVELOP AND MOVE EWD
TOWARD THE RIO GRANDE RIVER LATE THIS EVENING. HOWEVER...DUE TO THE
ISOLATED NATURE OF THE CONVECTION AND UNCERTAINTIES REGARDING THE
SYSTEMS SPEED...WILL NOT ISSUE A THUNDER CONTOUR IN THIS AREA ATTM.
...WEST COAST...
ANOTHER AREA OF WEAK INSTABILITY WILL MOVE ONSHORE ACROSS NRN CA AND
ORE. STRONG LIFT AHEAD OF AN UPSTREAM SHORTWAVE WILL RESULT IN
WIDESPREAD PRECIPITATION. A FEW LIGHTNING STRIKES WILL BE POSSIBLE
IN THE HEAVIER RAINFALL BUT ANY THUNDERSTORMS SHOULD REMAIN TOO
ISOLATED FOR A THUNDER CONTOUR IN THIS REGION.
..BROYLES/GUYER.. 01/07/2004
...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.
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 1630Z
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