000
FXUS61 KGYX 200746
AFDGYX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
246 AM EST THU NOV 20 2008
.SYNOPSIS...
COLD HIGH PRESSURE WILL GRADUALLY BUILD EAST THROUGH THE WEEKEND.
BY EARLY NEXT WEEK THE HIGH PRESSURE SYSTEM MOVES OFFSHORE WITH A
DEVELOPING RETURN OF SOUTHERLY WINDS WITH INCREASING MOISTURE...INSTABILITY
AND MODERATING TEMPERATURES. ON TUESDAY A COASTAL LOW MAY DEVELOP
OFF THE COAST AND AFFECT THE AREA WITH UNSETTLED WEATHER.
&&
.NEAR TERM /THROUGH TODAY/...
A COLD CYCLONIC FLOW ALOFT WILL SETTLE OVER THE AREA BUT VERY
LIMITED MOISTURE WILL BE NOTED WITH MOST CLOUDS IN THE MID LEVELS.
A LIGHT DOWNSLOPING WIND WILL ALSO INHIBIT CLOUDS ALONG THE
COASTAL PLAIN. TEMPERATURES WILL ONCE AGAIN BE VERY COLD AS PER
GUIDANCE SUGGESTS AS H85 TEMPS OF -12 TO -15C FCST.
&&
.SHORT TERM /TONIGHT/...
THE COLD CYCLONIC FLOW WILL CONTINUE WITH SOME CLOUDS FROM TIME TO
TIME AND A SLIGHT CHANCE OF SNOW SHOWERS IN THE MTNS. THE VERY
COLD TEMPS WILL CONTINUE WITH LOWS INTO THE SINGLE NUMBERS AND
TEENS.
&&
.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
SEMIPERMANENT UPPER LOW IN QUEBEC DIGS ANOTHER TROUGH TO OUR WEST
DURING FRIDAY AND CLOSES IT OFF BY SATURDAY. AN OFFSHORE LOW WILL
INTENSIFY WELL OFFSHORE AND IS NOT EXPECTED TO PLAY MUCH OF A ROLE
IN OUR WEATHER...EXCEPT TO HELP KEEP A COLD NORTHERLY WIND IN
PLACE. THAT UPPER LOW HEADS NORTHWARD AND ALLOWS HIGH PRESSURE TO
TAKE HOLD FOR A NICE SUNDAY. OVERRUNNING CLOUDS WILL MOVE INTO
SOUTHERN AREAS SUNDAY NIGHT AS ANOTHER CLOSED SYSTEM TAKES SHAPE
IN THE GREAT LAKES. MAINLY LIGHT SNOW FROM THIS...WITH A MIX NEAR
THE COAST. GFS SPINS UP A SECONDARY LOW OFF THE JERSEY COAST
EARLY TUESDAY AND LIFTS IT TO THE GULF OF MAINE LATE TUESDAY.
ENOUGH WARM AIR MAY GET IN TO BRING RAIN OR A MIX TO SOUTHERN
PORTIONS TUESDAY INTO WEDNESDAY...WITH SNOW FOR THE MOUNTAINS.
&&
.AVIATION /07Z THURSDAY THROUGH MONDAY/...
SHORT TERM /THROUGH TONIGHT/...VFR WX EXPECTED THRU THE SHORT
TERM.
LONG TERM...LARGELY VFR CONDITIONS EXPECTED THROUGH SUNDAY.
DETERIORATING CONDITIONS FOR SUNDAY NIGHT AND MONDAY.
&&
.MARINE...
SHORT TERM /TODAY AND TONIGHT/...WINDS HAVE DIMINISHED AND WILL
REMAIN BELOW SCA CRITERIA THRU TONIGHT SO THE SCA HAS BEEN
DISCONTINUED.
LONG TERM...GRADIENT FROM OFFSHORE LOW COULD REQUIRE SMALL CRAFT
FRIDAY NIGHT INTO SATURDAY...AND PERHAPS EVEN GALES. WINDS
STRENGTHEN AGAIN INTO THE SCA CRITERIA FOR MONDAY...THIS TIME OUT
OF THE SOUTH AHEAD OF THE LOW FROM THE WEST.
&&
.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...NONE.
&&
$$
