|
Mesoscale Discussion 181 |
< Previous MD Next MD >
|
|
MESOSCALE DISCUSSION 0181
NWS STORM PREDICTION CENTER NORMAN OK
0501 PM CDT WED MAR 12 2014
AREAS AFFECTED...NRN NH/VT INTO ME
CONCERNING...HEAVY SNOW
VALID 122201Z - 130400Z
SUMMARY...HEAVY SNOW WILL CONTINUE ACROSS NRN NH/VT AND SRN MAINE
WHILE SHIFTING E/NE ACROSS NRN MAINE THIS EVENING AND TONIGHT. HEAVY
SNOWFALL RATES OF 1 INCH PER HOUR ARE EXPECTED...WITH PERIODS OF 2
INCH PER HOUR RATES NOT UNCOMMON. ADDITIONALLY...BLOWING SNOW WILL
FURTHER REDUCE VISIBILITIES AS WIND SPEEDS INCREASE THIS EVENING TO
AROUND 10-20 MPH WITH GUSTS TO 30 MPH.
DISCUSSION...HEAVY SNOW HAS BEEN OCCURRING THIS AFTERNOON ACROSS NRN
NY/NH/VT AND SRN MAINE IN A BAND OF STRONG ASCENT AND 850 MB
FRONTOGENESIS TO THE NORTH OF THE SURFACE LOW CURRENTLY LOCATED OVER
CENTRAL PA. AS THE LOW CONTINUES TO TRACK E/NE THIS EVENING...HEAVY
SNOW IS EXPECTED TO CONTINUE IN FAVORABLE DEFORMATION ZONE ACROSS
NRN NH/VT AND PIVOTING E/NE INTO CENTRAL AND NRN MAINE. FORECAST
SOUNDINGS INDICATE SOME VERY WEAK MIDLEVEL INSTABILITY /LESS THAN
100 J PER KG MUCAPE/. THIS SHOULD PRECLUDE MUCH IN THE WAY OF
THUNDERSNOW BUT COULD AID IN THE DEVELOPMENT OF CONVECTIVELY
ENHANCED HEAVIER BANDS OF SNOW. WIDESPREAD RATES OF 1 INCH PER HOUR
ARE EXPECTED...BUT 2 INCHES PER HOUR WILL NOT BE UNCOMMON AT TIMES.
INCREASING SFC WINDS ON THE BACK SIDE OF THE LOW WILL SPREAD ACROSS
THE REGION THIS EVENING AND OVERNIGHT..LEADING TO BLOWING AND
DRIFTING SNOW AND LOWERING VISIBILITIES EVEN FURTHER WITH N/NELY
WINDS AROUND 10-20 MPH GUSTING TO 30 MPH.
..LEITMAN.. 03/12/2014
ATTN...WFO...CAR...GYX...BTV...
LAT...LON 46076737 45696749 45326778 44756881 44256988 43727103
43527283 43827339 44597342 45077298 46897026 47686909
47736785 47296727 46076737
|
Top/All Mesoscale Discussions/Forecast Products/Home
|
|