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Mesoscale Discussion 241 |
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MESOSCALE DISCUSSION 0241
NWS STORM PREDICTION CENTER NORMAN OK
0545 PM CDT WED APR 08 2015
AREAS AFFECTED...EXTREME ERN KS...CNTRL AND NRN MO THROUGH WRN IL
CONCERNING...SEVERE THUNDERSTORM WATCH 34...35...
VALID 082245Z - 082345Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
34...35...CONTINUES.
SUMMARY...SEVERE THUNDERSTORM WATCH 34 AND 35 ARE SCHEDULED TO
EXPIRE AT 23Z AND 00Z RESPECTIVELY. THESE WATCHES WILL LIKELY BE
REPLACED BY A TORNADO WATCH BEFORE 00Z TO ACCOUNT FOR THE POTENTIAL
DEVELOPMENT OF NEW STORMS THIS EVENING. THESE STORMS MAY EVOLVE INTO
SUPERCELLS AND BECOME CAPABLE OF PRODUCING VERY LARGE HAIL AND A FEW
TORNADOES AS WELL AS DAMAGING WIND GUSTS.
DISCUSSION...EARLY THIS EVENING AN OUTFLOW BOUNDARY EXTENDED ACROSS
CNTRL IL WITH A WARM FRONT FROM NRN MO THROUGH NERN KS. ANOTHER
CONVECTIVE OUTFLOW BOUNDARY WAS INDICATED FROM SERN THROUGH CNTRL
AND NWRN MO. WARM SECTOR IN VICINITY OF AND SOUTH OF THESE
BOUNDARIES REMAIN MODERATELY TO STRONGLY UNSTABLE WITH 2000-3000
J/KG MLCAPE. CLUSTER OF CONVECTION MOVING THROUGH WCNTRL MO DOES NOT
APPEAR TO BE ROOTED IN THE BOUNDARY LAYER WHICH IS STILL CAPPED BY
AT LEAST A MODEST INVERSION. OTHER STORMS DEVELOPING ALONG THE WARM
FRONT NEAR KANSAS CITY APPEAR TO BE SFC BASED. STORMS ARE EXPECTED
TO UNDERGO SOME INCREASE IN COVERAGE THIS EVENING AS THE LLJ
STRENGTHENS TO 40-50 KT WHICH SHOULD AUGMENT ASCENT AND ENLARGE
LOW-LEVEL HODOGRAPHS. THESE STORMS WILL HAVE THE POTENTIAL TO BECOME
ROOTED IN THE BOUNDARY LAYER BEFORE THE SFC LAYER DECOUPLES LATER
THIS EVENING. SUPERCELLS WITH LARGE HAIL AND A FEW TORNADOES WILL BE
POSSIBLE.
..DIAL/THOMPSON.. 04/08/2015
ATTN...WFO...LSX...SGF...EAX...
LAT...LON 37559421 38539504 39909425 39679150 38919068 37799137
37559421
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