Mid West.
MESOSCALE DISCUSSION 0725
NWS STORM PREDICTION CENTER NORMAN OK
0606 AM CDT FRI APR 25 2008
AREAS AFFECTED...NRN NEB...ERN SD...FAR WRN MN
CONCERNING...HEAVY SNOW
VALID 251106Z - 251700Z
HEAVY SNOW RATES OF 1 TO 1.5 IN/HR ARE EXPECTED TO MATERIALIZE
THROUGH THE MORNING HOURS FROM NRN NEB SPREADING NEWD INTO SD AND
MN.
DEEP TROPOSPHERIC LOW WILL CONTINUE TO INTENSIFY AS IT MOVES NEWD
ACROSS IA THIS MORNING. AS THIS OCCURS...FRONTOGENETICAL FORCING
WILL INCREASE IN A SW-NE BAND FROM NRN NEB INTO WRN MN...AND WILL
CONCENTRATE AN AREA OF HEAVY WINTER PRECIPITATION. RAIN OVER SERN SD
WILL GRADUALLY CHANGE TO SNOW BY LATE MORNING FROM W TO E. PORTIONS
OF E CNTRL SD AND WRN MN MAY SEE A MIXTURE OF FREEZING RAIN AND
SLEET BEFORE CHANGING TO ALL SNOW LATER TODAY. FORECAST SOUNDINGS
INDICATE JUXTAPOSITION OF VERY STRONG VERTICAL MOTION AND SATURATED
PROFILES WITHIN THE FAVORED DENDRITIC GROWTH ZONE. THUS...HEAVY
BURSTS OF SNOW...EXCEEDING 1 IN/HR...ARE LIKELY.
..JEWELL.. 04/25/2008
No comments:
Post a Comment