SWOMCD
SPC MCD 192310
SDZ000-NEZ000-MTZ000-WYZ000-200015-
MESOSCALE DISCUSSION 1481
NWS STORM PREDICTION CENTER NORMAN OK
0610 PM CDT THU JUN 19 2008
AREAS AFFECTED...WY...SD...MT
CONCERNING...SEVERE THUNDERSTORM WATCH 580...
VALID 192310Z - 200015Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 580
CONTINUES.
BROKEN LINE OF STRONG AND OCCASIONALLY SEVERE STORMS WAS NOW
DRIFTING EAST FROM HIGHER TERRAIN ACROSS NERN WY. DEVELOPMENT OF
THIS ACTIVITY...AS WELL AS STORMS ACROSS SERN MT APPEARS LINKED TO
RESIDUAL FRONTAL BOUNDARY THAT BACKED INTO THE REGION EARLIER TODAY.
THIS REMNANT BOUNDARY ALSO INTERSECTS ANOTHER WIND SHIFT LINE/TROUGH
SPREADING SEWD ACROSS ERN MT ATTM. STORMS OVER POWDER RIVER AND
CUSTER COUNTIES MAY BE ENHANCED NEAR THIS BOUNDARY INTERSECTION.
ADDITIONAL STORMS HAVE AGAIN INITIATED ACROSS THE BLACK HILLS THIS
EVENING.
ALL THIS CONVECTION WILL CONTINUE TO DRIFT EWD THIS EVENING WITH
SOME POTENTIAL FOR HAIL AND GUSTY WINDS. LARGE SCALE SUPPORT FROM
PASSING MID/UPPER WAVE MAY MAINTAIN THE RISK FOR A COUPLE OF
STRONGER STORMS INTO THE EVENING. HOWEVER...INSTABILITY AND SHEAR
ACROSS THE REGION ARE NOT QUITE AS POTENT AS PRIOR NIGHTS AND IT IS
POSSIBLE A GRADUAL WEAKENING TREND WILL SET IN IF IT IS NOT
OCCURRING ALREADY.
..CARBIN.. 06/19/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...UNR...CYS...BYZ...RIW...
42450367 42380750 45780711 45730331
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