DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 141930
SWODY1
SPC AC 141928

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0228 PM CDT SAT SEP 14 2013

VALID 142000Z - 151200Z

...NO SVR TSTM AREAS FORECAST...

NO CHANGES TO THE PREVIOUS OUTLOOK.

..JEWELL.. 09/14/2013

.PREV DISCUSSION... /ISSUED 1106 AM CDT SAT SEP 14 2013/

...SYNOPSIS...
MORNING WATER VAPOR IMAGERY SHOWS A LARGE-SCALE UPPER TROUGH OVER
THE ERN SEABOARD AS A MID-LEVEL ANTICYCLONE IS SUBJUGATED OVER THE
ARKLATEX. IN THE LOW LEVELS...EXPANSIVE HIGH PRESSURE CENTERED OVER
THE SRN GREAT LAKES WILL INFLUENCE WEATHER CONDITIONS OVER MUCH OF
THE ERN U.S. AND THUNDERSTORMS WILL BE CONFINED TO PARTS OF THE GULF
AND SERN COASTS. WEAK MID-LEVEL LAPSE RATES WILL LIKELY PROVE
DETRIMENTAL TO CONCENTRATED AREAS OF STRONGER THUNDERSTORM ACTIVITY
OVER THE AFOREMENTIONED REGIONS. FARTHER WEST...A BROAD MID-LEVEL
LOW GENERALLY QUASI-STATIONARY OVER THE ERN GREAT BASIN WILL PROMOTE
THE DEVELOPMENT OF SCATTERED SHOWERS/THUNDERSTORMS DURING THE DAY
OVER A LARGE PORTION OF THE INTERIOR WESTERN U.S. EXTENDING INTO THE
HIGH PLAINS. WEAK BUOYANCY OWING IN PART TO EXTENSIVE CLOUDINESS
WILL TEND TO INHIBIT UPDRAFT STRENGTH AND PRECLUDE LOW SEVERE
PROBABILITIES OVER THE PLAINS AND INTERMOUNTAIN WEST.

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