Tuesday, September 23, 2008

DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 230802
SWOD48
SPC AC 230801

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0301 AM CDT TUE SEP 23 2008

VALID 261200Z - 011200Z

...DISCUSSION...
BROAD/CLOSED CYCLONE ALOFT...DISCUSSED IN DAY 2 AND 3 OUTLOOKS...IS
EXPECTED TO RETROGRADE INLAND DAY-4. GREAT INCONSISTENCIES ARE
EVIDENT AMONG SPECTRAL/ECMWF/UK PROGS REGARDING SFC REFLECTION OF
THIS SYSTEM DAYS 4-5 BEFORE IT REJOINS NRN STREAM WLYS AND EJECTS
NEWD...AND MOST MREF MEMBERS KEEP PRIMARY SFC LOW OFFSHORE. BY DAYS
6-8/28TH-1ST...GEN MREF CONSENSUS INDICATES PRONOUNCED ERN
TROUGH/WRN RIDGE SYNOPTIC PATTERN ALOFT...THAT CLIMATOLOGICALLY
WOULD TEND TO SUPPRESS ORGANIZED SVR POTENTIAL OVER MOST OR ALL OF
CONUS. ENOUGH SPREAD EXISTS IN SFC SOLUTIONS WITH THESE ERN
LOWS/TROUGHS THAT CONFIDENCE IS LOW IN SUFFICIENT DESTABILIZATION TO
SUPPORT SVR ALONG E COAST.

..EDWARDS.. 09/23/2008

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