MESO: Mesoscale Discussion 0341

ACUS11 KWNS 222351
SWOMCD
SPC MCD 222351
OKZ000-KSZ000-NEZ000-COZ000-NMZ000-230045-

MESOSCALE DISCUSSION 0341
NWS STORM PREDICTION CENTER NORMAN OK
0651 PM CDT THU APR 22 2010

AREAS AFFECTED...ERN CO/WRN KS AND FAR SWRN NEB

CONCERNING...TORNADO WATCH 74...

VALID 222351Z - 230045Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 74 CONTINUES.

AT 2330Z...GREATEST SEVERE WEATHER THREAT OVER ERN CO/WRN KS EXISTS
ALONG AND E OF AN SPD TO LAA TO AKO LINE. AN ADDITIONAL WW MAY BE
NEEDED FOR PORTIONS OF WRN KS AS THE 02Z EXPIRATION OF WW 74
APPROACHES. IN THE MEAN TIME...SHORT TERM THREAT FOR SVR MAY SPREAD
INTO FAR SWRN NEB.

TWO SEPARATE CLUSTERS OF SUPERCELLS...POTENTIALLY TORNADIC...EXIST
NW OF GCK IN WRN KS...AND INVOF ITR IN ERN CO. THIS ACTIVITY IS
GENERALLY MOVING NNE AT AROUND 25 KT...AND WILL BEGIN TO APPROACH
THE NRN EDGE OF INSTABILITY GRADIENT DURING THE NEXT HR OR
TWO...WHICH IS ALIGNED FROM CENTRAL KS NWWD INTO NERN CO AT 23Z.
SHORT TERM MODEL GUIDANCE INDICATES THAT LOW LEVEL MOISTURE
ADVECTION AND ADDITIONAL DESTABILIZATION MAY OCCUR ACROSS WRN INTO
NRN KS DURING THE EVENING/NIGHT. THIS MAY AID IN SUSTAINING SVR
ACTIVITY IN KS PAST SUNSET...WITH NEW DEVELOPMENT POSSIBLY EMANATING
OUT OF THE CENTRAL/SRN HIGH PLAINS AS SECOND UPPER IMPULSE
APPROACHES THE REGION BY 06Z. FORECAST SOUNDINGS INTO THE NIGHT
CONTINUE TO INDICATE THE PRESENCE OF NEAR-SURFACE BASED INSTABILITY
ACROSS WRN KS...WITH SHEAR PROFILES SUPPORTIVE OF SUPERCELLS POSING
A THREAT OF LARGE HAIL/DAMAGING WIND GUSTS AND PERHAPS A FEW
TORNADOES. THUS...PORTIONS OF WRN KS MAY REQUIRE AN ADDITIONAL WW
NEAR 02Z.

.GARNER.. 04/22/2010

..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...OUN...LBF...DDC...GLD...AMA...PUB...BOU...ABQ...

LAT...LON 40360439 40350081 36999964 36980309 40360439

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