|
| Mesoscale Discussion 406 |
|
< Previous MD
Next MD >
|
|
MESOSCALE DISCUSSION 0406
NWS STORM PREDICTION CENTER NORMAN OK
0104 AM CDT MON APR 06 2009
AREAS AFFECTED...SRN LOWER MI...FAR NRN IND...FAR NE IL
CONCERNING...HEAVY SNOW
VALID 060604Z - 061000Z
HEAVY SNOW WILL CONTINUE ACROSS SRN LOWER MI AND FAR NRN IND TONIGHT
FOR THE REMAINDER OF THE NIGHT. SNOWFALL RATES OF 1 INCH PER HOUR
WILL BE COMMON WITH LOCALLY UP TO 2 INCHES PER HOUR POSSIBLE IN
SHORT BURSTS IN THE HEAVIER BANDS.
LATEST SFC ANALYSIS SHOWS A 993 MB SFC LOW OVER SERN OH WITH AN
UPPER-LEVEL TROUGH LOCATED OVER THE LOWER OH VALLEY ACCORDING TO
WATER VAPOR IMAGERY. A WELL-DEFINED COMMA CLOUD IS LOCATED AROUND
THE SFC LOW WITH A PRONOUNCED DRY SLOT ASSOCIATED WITH A IMPRESSIVE
90 TO 100 KT MID-LEVEL JET LOCATED FROM NRN MS NEWD INTO CNTRL OH.
LARGE-SCALE ASCENT IS LIKELY BEING ENHANCED ACROSS THE GREAT LAKES
REGION DUE TO THE LEFT EXIT REGION OF THE MID-LEVEL JET. IN
ADDITION...MODEL FORECASTS MAINTAIN A ZONE OF STRONG ISENTROPIC LIFT
ACROSS THE MCD AREA TONIGHT. THIS SHOULD SUPPORT HEAVY SNOW FOR THE
REST OF THE NIGHT ACROSS LOWER MI AND NRN IND. SFC TEMPS ARE
CURRENTLY NEAR OR JUST ABOVE FREEZING ACROSS MOST OF THE MCD AREA
WHICH SHOULD LESSEN SNOWFALL ACCUMULATIONS UNTIL LATER TONIGHT.
SNOWFALL RATES SHOULD GRADUALLY DECREASE OVER NE IL AS THE SYSTEM
MOVES SLOWLY EWD ACROSS THE OH VALLEY.
..BROYLES.. 04/06/2009
ATTN...WFO...DTX...IWX...GRR...LOT...
LAT...LON 42028311 41418544 40888731 41058789 41568789 42348688
43428431 43468342 43198279 42768252 42028311
|
|
Top/All Mesoscale Discussions/Forecast Products/Home
|
|