SWOMCD
SPC MCD 212015
MNZ000-IAZ000-NEZ000-SDZ000-212045-
MESOSCALE DISCUSSION 1240
NWS STORM PREDICTION CENTER NORMAN OK
0315 PM CDT THU JUN 21 2007
AREAS AFFECTED...SERN SD/SWRN MN/FAR NWRN IA
CONCERNING...SEVERE THUNDERSTORM WATCH 433...
VALID 212015Z - 212045Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 433
CONTINUES.
ISOLATED HAIL THREAT IS EXPECTED TO REMAIN POSSIBLE ACROSS SERN SD
INTO SWRN MN/FAR NWRN IA THIS AFTERNOON WITH TSTMS...LIKELY
ELEVATED...THAT DEVELOP ATOP MORE STABLE/CONVECTIVELY OVERTURNED AIR
MASS IN WAKE OF MCS. GIVEN DIMINISHING SEVERE THREAT IN THE SHORT
TERM...WW 433 WILL BE ALLOWED TO EXPIRE AT 21Z.
PARTS OF THIS REGION MAY HAVE AN INCREASED SEVERE THREAT LATER THIS
EVENING WITH ANY ACTIVITY THAT DEVELOPS OVER THE NRN HIGH PLAINS AND
TRACKS TO THE ESE. PLEASE REFER TO SPC DAY 1 CONVECTIVE OUTLOOK FOR
ADDITIONAL INFORMATION ABOUT THE POTENTIAL SEVERE WEATHER THREAT
INTO THE EVENING/OVERNIGHT PERIOD.
.PETERS.. 06/21/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MPX...DMX...FSD...OAX...ABR...LBF...UNR...
44639572 43999491 43089494 42279544 42139630 42699723
42739812 42929961 43739954 44719875
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