Area Forecast Discussion
Issued by NWS Portland, ME

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KGYX 210821 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 321 AM EST FRI NOV 21 2014 .SYNOPSIS...
-- Changed Discussion --
A COLD FRONT WILL MOVE THROUGH THE REGION THIS MORNING FOLLOWED BY A BLUSTERY NORTHWEST WIND. HIGH PRESSURE WILL BUILD TO THE SOUTH OF THE AREA TONIGHT AND SATURDAY. A WARM FRONT APPROACHES FROM THE SOUTHWEST MONDAY MORNING AND LIFTS NORTHEAST BY MONDAY NIGHT. A COLD FRONT ATTEMPTS TO MOVE SOUTH MONDAY NIGHT/TUESDAY MORNING. LOW PRESSURE PASSES BY WELL OFFSHORE WEDNESDAY AND THANKSGIVING DAY. WEAK LOW PRESSURE PASSES TO THE NORTH FRIDAY DRAGGING A COLD FRONT THROUGH THE REGION.
-- End Changed Discussion --
&& .NEAR TERM /THROUGH TODAY/...
-- Changed Discussion --
AT 07Z...AN ARCTIC COLD FRONT WAS DRAPED ALONG THE SAINT LAWRENCE VALLEY. THE FRONT WILL RACE SOUTHEAST AND OFFSHORE THIS MORNING. ACROSS THE HIGHER TERRAIN WE`LL SEE CLOUDS AND A FEW SNOW SHOWERS WITH ITS PASSAGE AND A FEW UPSLOPE CLOUDS AND SNOW SHOWERS IN ITS WAKE. HIGHS TODAY WILL RANGE FROM THE TEENS IN THE MOUNTAINS TO LOWER 30S AT THE COAST...BUT THE BLUSTERY NORTHWEST WIND WILL MAKE IT FEEL A GOOD TEN TO FIFTEEN DEGREES COLDER THEN THAT.
-- End Changed Discussion --
&& .SHORT TERM /TONIGHT THROUGH 6 PM SATURDAY/...
-- Changed Discussion --
OUTSIDE OF A FEW CLOUDS ACROSS NORTHERN SECTIONS...IT`LL BE MAINLY CLEAR AND COLD AS SURFACE HIGH PRESSURE BUILDS BY TO OUR SOUTH. LOWS TONIGHT WILL BE IN THE SINGLE NUMBERS AND TEENS...WITH A FEW 20 DEGREE READINGS CONFINED TO THE IMMEDIATE COAST. ON SATURDAY...A SOUTHWEST FLOW DEVELOPS AS THE SURFACE HIGH SHIFTS OFFSHORE WITH CLOUDS GRADUALLY INCREASING IN DEVELOPING WARM AIR ADVECTION PATTERN. EXPECT ANY LATE DAY SNOW SHOWERS TO BE CONFINED TO NORTHERN SECTIONS. HIGHS SHOULD BE MAINLY IN THE 30S.
-- End Changed Discussion --
&& .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
-- Changed Discussion --
SOMEWHAT QUIET BUT CHANGEABLE PERIOD OF WEATHER ON TAP FOR THE EXTENDED INCLUDING THANKSGIVING. OVERALL UPPER LEVEL TROUGHING REMAINS IN PLACE...BUT VARIOUS SHORT WAVES AND A PERIOD OF RIDGING MAKE FOR A FEW DETAILS TO NOTE. WE WILL SEE A NICE WARM UP SUNDAY THROUGH TUESDAY AS THIS MERIDIONAL PATTERN BUCKLES AND RIDGING DEVELOPS OVER THE EASTERN SEABOARD IN RESPONSE TO A DEEPENING TROUGH OVER THE CENTRAL CONUS. PROMINENT SHORT WAVE ROTATING THROUGH THE TROUGH WILL PROMPT A WARM FRONT TO LIFT THROUGH NEW ENGLAND MONDAY SPREADING MOSTLY RAIN ACROSS THE AREA. SOME OF THE COOLER LOCATIONS EARLY SUNDAY MORNING MAY HAVE A WINTRY MIX AT THE ONSET OF PRECIPITATION. LIKEWISE...VERY EARLY MONDAY MORNING FREEZING RAIN MAY BE THE PRECIPITATION TYPE FOR A FEW NORTHERN LOCATIONS AS SURFACE TEMPERATURES DROP BELOW FREEZING. PRECIPITATION BECOMES SHOWERY AS A COLD FRONT MOVES INTO THE REGION...LIKELY CLEARING THE AREA MONDAY NIGHT/TUESDAY MORNING. AS TEMPERATURES DROP LIGHT SNOW SHOWERS WILL DOMINATE IN UPSLOPE AREAS. CLOUDS AND SHOWERS CLEAR OUT ACROSS THE COASTAL PLAIN AS WINDS BECOME NW WEDNESDAY AND THANKSGIVING DAY. OCEAN LOW PRESSURE PASSES WELL OUTSIDE THE BENCHMARK WEDNESDAY NIGHT AND MOVES INTO THE MARITIMES THANKSGIVING DAY. THIS WILL HAVE SOME IMPACT BY KEEPING A SLIGHT CHANCE OF RAIN JUST OFF THE COAST AND TO STRENGTHEN DOWNSLOPE PROCESSES. THANKSGIVING DAY LOOKS COOL WITH TEMPERATURES IN THE LOWER 30S NORTH TO UPPER 30S/LOWER 40S SOUTH AND A SLIGHT CHANCE OF SHOWERS IN THE MOUNTAINS AND OVER THE MIDCOAST.
-- End Changed Discussion --
&& .AVIATION /08Z FRIDAY THROUGH TUESDAY/...
-- Changed Discussion --
SHORT TERM /THROUGH SATURDAY/...HIE WILL SEE MVFR AT TIMES IN SNOW SHOWERS THIS MORNING. ELSEWHERE CEILINGS WILL BE VFR WITH NW WINDS GUSTING TO 25 KT THROUGH THE AFTERNOON. LONG TERM...PERIODS OF MVFR AND IFR LIKELY IN RAIN AND SNOW MONDAY. MOUNTAIN TERMINALS WILL SEE A CHANCE OF MVFR CONDITIONS TUESDAY THROUGH THURSDAY IN INTERMITTENT SNOW SHOWERS.
-- End Changed Discussion --
&& .MARINE...
-- Changed Discussion --
SHORT TERM /THROUGH SATURDAY/...IT`S LIKELY WILL SEE GUSTS TO MINIMAL GALE OUTSIDE THE BAYS TODAY WITH PASSAGE OF THE ARCTIC FRONT...AND A GALE HAS BEEN POSTED FOR AREAS OUTSIDE THE BAYS. OTHERWISE...EXPECT SMALL CRAFT CONDITIONS FOR THE REMAINDER OF THE PERIOD. LONG TERM...SCA NEEDED SATURDAY NIGHT INTO SUNDAY MORNING IN STRONG PRESSURE GRADIENT WINDS...AND AGAIN MONDAY THROUGH WEDNESDAY MORNING IN ASSOCIATION WITH A FRONTAL SYSTEM.
-- End Changed Discussion --
&& .GYX WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 8 PM EST THIS EVENING FOR ANZ151- 153. GALE WARNING UNTIL 8 PM EST THIS EVENING FOR ANZ150-152-154.
-- End Changed Discussion --
&& $$ SCHWIBS/HANES

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.