SWODY1
SPC AC 180039
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0739 PM CDT WED AUG 17 2011
VALID 180100Z - 181200Z
...THERE IS A SLGT RISK OF SVR TSTMS OVER PORTIONS OF SD/NEB...
...THERE IS A SLGT RISK OF SVR TSTMS OVER SERN CO...
...SD/NEB...
SCATTERED SUPERCELL ACTIVITY THAT HAS EVOLVED ACROSS PORTIONS OF
SCNTRL SD INTO CHERRY COUNTY NEB HAS STRUGGLED TO MAKE A SIGNIFICANT
MOVE EAST THIS EVENING. CONVECTION WILL LIKELY MAINTAIN A SWD
PROPAGATIONAL COMPONENT ATOP LLJ THAT SHOULD INTENSIFY OVER THE NEXT
FEW HOURS. LATEST RADAR DATA STRONGLY SUGGESTS SEVERAL SEVERE
UPDRAFTS WITH VERY LARGE HAIL ACROSS MELLETTE COUNTY SD AND OVER SRN
CHERRY/NRN HOOKER COUNTY NEB. SEVERE THREAT SHOULD CONTINUE FOR THE
NEXT SEVERAL HOURS BEFORE BOUNDARY LAYER DECOUPLES AND UPDRAFTS
GRADUALLY WEAKEN.
...SERN CO...
SEVERE THREAT APPEARS TO BE INCREASING ACROSS A SMALL PART OF THE
CNTRL HIGH PLAINS OVER SERN CO...PERHAPS INTO PORTIONS OF THE WRN OK
PANHANDLE BY 04-05Z. TSTMS HAVE RECENTLY INTENSIFIED ACROSS
PUEBLO/OTERO/KIOWA COUNTIES AND ARE SURGING SEWD AT ROUGHLY 25KT.
THIS CONVECTION IS LIKELY PRODUCING STRONG WINDS AND THE 01Z OUTLOOK
WILL REFLECT THIS SECONDARY SEVERE THREAT WITHIN FAVORABLE UPSLOPE
REGIME. REF LATEST SWOMCD FOR FURTHER INFORMATION
(HTTP://WWW.SPC.NOAA.GOV/PRODUCTS/MD/MD1997.HTML)
..DARROW.. 08/18/2011
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