SWOMCD
SPC MCD 291032
IAZ000-NEZ000-SDZ000-291230-
MESOSCALE DISCUSSION 1078
NWS STORM PREDICTION CENTER NORMAN OK
0532 AM CDT THU MAY 29 2008
AREAS AFFECTED...ERN NEB...WRN IA...EXTREME SERN SD
CONCERNING...OUTLOOK UPGRADE
VALID 291032Z - 291230Z
MUCH OF ERN NEB...WRN IA...AND EXTREME SERN SD WILL BE UPGRADED TO A
HIGH RISK AT 13Z TODAY.
...PUBLIC SEVERE WEATHER OUTLOOK...
A STRONG UPPER TROUGH IS CURRENTLY MOVING ACROSS PARTS OF
UTAH/ARIZONA...AND WILL TRACK INTO THE CENTRAL PLAINS BY LATE THIS
AFTERNOON. AHEAD OF THIS SYSTEM...STRONG SOUTHERLY LOW LEVEL WINDS
ARE DRAWING A VERY MOIST AND UNSTABLE AIRMASS NORTHWARD INTO THE
CENTRAL PLAINS. THUNDERSTORMS ARE EXPECTED TO DEVELOP AND RAPIDLY
BECOME SEVERE OVER PARTS OF CENTRAL NEBRASKA...NORTH CENTRAL
KANSAS...AND SOUTH CENTRAL SOUTH DAKOTA BY MID/LATE AFTERNOON.
THESE STORMS WILL LIKELY BE SUPERCELLS CAPABLE OF VERY LARGE
HAIL...DAMAGING WINDS...AND TORNADOES. ACTIVITY WILL INCREASE IN
COVERAGE AND INTENSITY THROUGH THE EVENING AS THUNDERSTORMS SPREAD
INTO PARTS OF WESTERN IOWA AND SOUTHWEST MINNESOTA. THE COMBINATION
OF A VERY UNSTABLE AIRMASS AND STRONG VEERING/INCREASING WINDS WITH
HEIGHT INDICATE A RISK OF STRONG TORNADOES OVER THE REGION THIS
AFTERNOON AND EVENING.
..JEWELL/HART.. 05/29/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DMX...FSD...OAX...GID...LBF...
40919863 41769911 42529868 43159769 43379668 43349489
42809455 41919470 40889569 40609670 40529776
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