FXUS61 KGYX 151901
AFDGYX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
201 PM EST TUE DEC 15 2009
.SYNOPSIS...
LOW PRESSURE WILL EXIT INTO THE MARITIMES THIS EVENING AND THEN
INTENSIFY OVERNIGHT, CREATING A STRONG NORTHWEST FLOW OVER THE
REGION THROUGH THURSDAY.
&&
.NEAR TERM /UNTIL 7 PM THIS EVENING/...
1007 MILLIBAR LOW WAS OVER BEAUCE IN SOUTHEAST QUEBEC AT 18Z WITH
COLD FRONT TRAILING THROUGH WESTERN NEW ENGLAND. RADAR MOSAIC
INDICATED SCATTERED RAIN AND SNOW SHOWERS ACROSS THE REGION. THIS
ACTIVITY WILL END IN ALL BUT THE HIGHER TERRAIN BY EARLY EVENING
WITH PASSAGE OF THE LOW AND TRAILING FRONT.
&&
.SHORT TERM /7 PM THIS EVENING THROUGH 6 PM WEDNESDAY/...
COLDER AIR DEEPENS BEHIND THE SYSTEM THIS EVENING WITH LINGERING
UPSLOPE PRECIPITATION IN THE FORM OF SNOW ACROSS THE HIGHER
TERRAIN DUMPING AN INCH OR SO OF ACCUMULATION OVERNIGHT.
ELSEWHERE...DOWNSLOPE FLOW SHOULD CLEAR THINGS OUT BEFORE
MIDNIGHT. THE SYSTEM BOMBS OUT ON WEDNESDAY AS UPPER TROUGH GOES
NEGATIVE WITH STRENGTHENING NORTHWEST WINDS FREQUENTLY GUSTING
OVER 30 MPH. EXPECT SOME LINGERING UPSLOPE CLOUDS AND SNOW SHOWERS
ACROSS THE HIGHER TERRAIN WITH SKIES AVERAGING PARTLY CLOUDY
ACROSS THE REMAINDER OF THE AREA. HIGHS STRUGGLE TO REACH THE TEENS
ACROSS THE MOUNTAINS WITH 20S ALONG THE COASTAL PLAIN...BUT WITH WIND
CHILLS A FULL 10 TO 15 DEGREES COLDER.
&&
.LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/...
MOSTLY A COLD AND VARIABLY CLOUDY PERIOD AS LOW PRESSURE TAKES UP
RESIDENCE OVER THE CANADIAN MARITIMES AND KEEPS A COLD NW FLOW
OVER THE REGION. WE START TO SEE SOME OVERUNNING PRECIP AS WARM
AIR WRAPS AROUND THE LOW AND COMES AT US FROM THE NORTH OVER THE
WEEKEND. EARLY NEXT WEEK THERE ARE QUESTIONS AS TO WHAT WILL TAKE
PLACE AS THE 00Z ECMWF FCST LARGE STORM TO MOVE OFF THE MID
ATLANTIC COAST.
&&
.AVIATION /19Z TUESDAY THROUGH SUNDAY/...
SHORT TERM /THROUGH 23Z WEDNESDAY/...LINGERING MVFR AND AREAS OF
IFR IMPROVING TO VFR THIS EVENING. MOUNTAIN CLOUDS AND SNOW
SHOWERS WILL PRODUCE LOCAL MVFR CONDITIONS TONIGHT AND WEDNESDAY.
NORTHWEST WINDS GUSTING BTWN 25 AND 30 KT EXPECTED WEDNESDAY.
LONG TERM...EXPECT VFR BUT WINDY.
&&
.MARINE...
SHORT TERM /THROUGH WEDNESDAY/...NORTHWEST WINDS INCREASE STEADILY
TONIGHT BEHIND THE INTENSIFYING SURFACE LOW OVER THE MARITIMES
WITH GALES LIKELY BY DAWN...THEN CONTINUING FOR THE REMAINDER OF
THE PERIOD.
LONG TERM...WILL LIKELY HAVE TO KEEP GALE WARNING GOING INTO THURS.
&&
.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...GALE WARNING FROM MIDNIGHT TONIGHT TO 7 PM EST THURSDAY FOR
ANZ150>154.
&&
$$
