PREVIOUS POST: The Storm Prediction Center has just issued a Mesoscale Discussion for areas north of the St. Cloud area, saying they expect a Severe Thunderstorm Watch to be issued within the next hour or so. Storms over South Dakota are gradually expanding and growing into North Dakota. These storms will continue to grow and expand in front of the warm front, stretching into parts of central and northwestern Minnesota. The main threats will be large hail and damaging winds with these storms. Will alert if a watch is issued, but currently it does not look like it would be for the STC area.
MESOSCALE DISCUSSION 0667
NWS STORM PREDICTION CENTER NORMAN OK
0821 PM CDT SAT MAY 22 2010
AREAS AFFECTED...ERN ND/CENTRAL AND NWRN MN
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 230121Z - 230245Z
SEVERE THUNDERSTORM WATCH WILL LIKELY BE REQUIRED IN THE NEXT HOUR
OR SO AS THREAT FOR HAIL WITH ELEVATED STORMS INCREASES.
LATEST VAD/PROFILER DATA SHOWS A SLY LOW-LEVEL JET -- AIMED INTO ERN
ND -- NOW BEGINNING TO INCREASE ACROSS THE CENTRAL AND NRN
PLAINS...WITH 50 KT NOW INDICATED AT SEVERAL LOCATIONS. AS THE JET
INCREASES...STORMS ARE ALSO EXPANDING ACROSS SD AND INTO THE SERN
QUARTER OF ND. EXPECT EXPANSION IN CONVECTION TO CONTINUE ACROSS
ERN ND AND INTO NWRN MN...N OF THE WARM FRONT STILL SITUATED INVOF
THE SERN ND/NERN SD BORDER AS ELEVATED THETA-E ADVECTION CONTINUES.
MID-LEVEL FLOW WILL CONTRIBUTE TO SHEAR SUFFICIENT FOR
ORGANIZED/SUPERCELL STORMS...AND THUS HAIL THREAT WILL LIKELY
WARRANT WW ISSUANCE N AND E OF THE EXISTING TORNADO WATCH.
..GOSS.. 05/23/2010
ATTN...WFO...DLH...MPX...FGF...BIS...
LAT...LON 47079927 47879986 48519954 48639812 48299559 46949417
45979521 46069647 47079927
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