SPC MD 405

MD 0405 CONCERNING SEVERE THUNDERSTORM WATCH 85… FOR NORTHEAST CO…NORTHWEST KS…SOUTHWEST NEB


MESOSCALE DISCUSSION 0405
NWS STORM PREDICTION CENTER NORMAN OK
0843 PM CDT MON APR 08 2013

AREAS AFFECTED...NORTHEAST CO...NORTHWEST KS...SOUTHWEST NEB

CONCERNING...SEVERE THUNDERSTORM WATCH 85...

VALID 090143Z - 090245Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 85
CONTINUES.

SUMMARY...STRONG TO SEVERE STORMS CONTINUE ACROSS THE WATCH AREA.
LARGE HAIL IS THE MAIN THREAT...BUT ISOLATED TORNADOES HAVE BEEN
REPORTED.

DISCUSSION...SCATTERED THUNDERSTORMS CONTINUE ACROSS NORTHEAST CO
AND SOUTHWEST KS.  A POWERFUL COLD FRONT IS SURGING SOUTHWARD INTO
THE AREA...NOW EXTENDING FROM DOUGLAS COUNTY NORTHEASTWARD INTO
WASHINGTON COUNTY...WHERE IT INTERSECTS ONE OF THE MORE INTENSE
STORMS.  NUMEROUS THUNDERSTORMS HAVE RECENTLY DEVELOPED BEHIND THE
FRONT TO THE EAST OF DENVER.  THESE STORMS ARE ELEVATED AND SHOULD
PRIMARILY POSE A RISK FOR LARGE HAIL.

FARTHER EAST...SUPERCELLS ARE AFFECTING PARTS OF WASHINGTON COUNTY
CO /IMMEDIATELY ALONG THE COLD FRONT/...PHILLIPS COUNTY CO...AND
CHEYENNE COUNTY KS.  SOUTHEASTERLY LOW LEVEL WINDS CONTINUE TO
RAPIDLY TRANSPORT 50S DEWPOINTS WESTWARD INTO THE REGION...HELPING
TO DESTABILIZE THE AIR MASS AND CONTRIBUTE TO STRONG UPDRAFTS.
LARGE HAIL WILL BE THE MAIN THREAT WITH THESE STORMS...BUT LOW LEVEL
VERTICAL SHEAR PROFILES WILL CONTINUE TO BE SUFFICIENT FOR A FEW
TORNADOES THROUGH 03Z.  A COOLING BOUNDARY LAYER SHOULD STRENGTHEN
THE CAP BY LATE EVENING...LESSENING THE TORNADO THREAT.

SOME CONCERN REMAINS THAT STRONG/SEVERE STORMS COULD DEVELOP
EASTWARD/NORTHEASTWARD INTO CENTRAL NEB IN THE NEXT FEW HOURS.

..HART/DIAL.. 04/09/2013

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

ATTN...WFO...LBF...GLD...BOU...

LAT...LON   39600429 40260418 40980282 40970202 40320131 39620176
            39790273 39650393 39600429

via SPC Forecast Products http://www.spc.noaa.gov/products/md/md0405.html