DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 020603
SWODY2
SPC AC 020601

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0101 AM CDT SUN SEP 02 2012

VALID 031200Z - 041200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF THE CENTRAL
PLAINS...

...SYNOPSIS...
WEAKLY CYCLONIC FLOW ALOFT WILL PREVAIL ACROSS THE NRN U.S. THIS
PERIOD...S OF A CENTRAL CANADA VORTEX. WITH THIS SYSTEM SO FAR
N...THE SURFACE PATTERN ACROSS THE CONUS SHOULD REMAIN GENERALLY
WEAK/DIFFUSE...WITH THE GREATEST SEVERE POTENTIAL LIKELY TO REMAIN
ACROSS THE CENTRAL U.S. INVOF A WEAKENING SURFACE FRONT.

...NEB AND VICINITY...
MODERATELY STRONG WLY FLOW ALOFT IS FORECAST TO SPREAD ACROSS THE
NEB/WRN IA VICINITY DURING THE DAY ATOP LOW-LEVEL SELYS...WHICH WILL
RESULT IN SHEAR SUPPORTIVE OF ORGANIZED STORMS. AS MODEST AFTERNOON
DESTABILIZATION COMMENCES INVOF THE WEAKENING SURFACE BOUNDARY
ACROSS THE NRN KS/WRN NEB VICINITY...AN INCREASE IN
SHOWERS/THUNDERSTORMS IS EXPECTED. AIDED BY THE FAVORABLE SHEAR...A
FEW STRONGER/ROTATING STORMS ARE EXPECTED TO EVOLVE -- AND THUS
POTENTIAL FOR LOCALLY DAMAGING WINDS AND HAIL...ALONG WITH AN
ISOLATED TORNADO OR TWO...REMAINS EVIDENT. STORMS MAY INCREASE IN
COVERAGE OVERNIGHT AS THE LOW-LEVEL JET DEVELOPS...THOUGH SEVERE
POTENTIAL SHOULD BEGIN TO DIMINISH LATER IN THE EVENING.

...UPPER GREAT LAKES REGION...
ONGOING SHOWERS AND STORMS ARE EXPECTED NEAR AND AHEAD OF A
WEAKENING FRONT ACROSS THE UPPER MS VALLEY REGION EARLY IN THE
PERIOD...WITH SOME INCREASE IN CONVECTIVE INTENSITY POSSIBLE DURING
THE AFTERNOON IN CONJUNCTION WITH MODEST DIURNAL DESTABILIZATION.
WITH MODERATE FLOW ALOFT...A FEW STRONGER STORMS COULD
EVOLVE...THOUGH IT APPEARS ATTM THAT MORE ACTIVE CONVECTION SHOULD
GENERALLY REMAIN FARTHER SW. STILL...LOCALLY STRONGER GUSTS AND
MARGINAL HAIL WILL BE POSSIBLE ACROSS THE UPPER MI/WI REGION THROUGH
EARLY EVENING.

...MS/AL VICINITY...
REMNANTS OF ISAAC ARE EXPECTED TO LINGER ACROSS THE MID-SOUTH REGION
THROUGH THE PERIOD...SUPPORTING A CONTINUED ZONE OF WIDESPREAD
SHOWERS AND THUNDERSTORMS. WITH A BELT OF ENHANCED FLOW ALOFT
AROUND PARTICULARLY THE S SIDE OF THE SYSTEM -- I.E. ACROSS THE
MS/AL VICINITY...A FEW ORGANIZED STORMS MAY EVOLVE -- WITH
LIMITED/LOCAL THREAT FOR GUSTY WINDS OR AN ISOLATED TORNADO.

..GOSS.. 09/02/2012

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