Area Forecast Discussion
Issued by NWS Portland, ME

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
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 311036 AAA AFDGYX AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE GRAY ME 636 AM EDT TUE MAR 31 2015 .SYNOPSIS... COOL HIGH PRESSURE WILL BUILD IN FROM THE NORTHWEST TODAY AND WEDNESDAY. LOW PRESSURE WILL MOVE EAST TO THE SOUTH OF SOUTHERN NEW ENGLAND TONIGHT. HIGH PRESSURE MOVES TO THE EAST ON THURSDAY WITH A WARMER SOUTHWEST FLOW DEVELOPING. SHOWERY WEATHER IS EXPECTED FRIDAY AND SATURDAY AS A FRONT STALLS NEAR THE REGION. LOW PRESSURE MOVING ALONG THIS FRONT WILL BRING A PERIOD OF RAIN OR SNOW FRIDAY NIGHT INTO SATURDAY. && .NEAR TERM /UNTIL 7 AM THIS MORNING/...
-- Changed Discussion --
UPDATE...MINOR CHANGES TO REFLECT CURRENT OBSERVATIONAL TRENDS. PREVIOUS DISCUSSION...SECONDARY S/WV TROF IS CROSSING THE AREA THIS MORNING. THIS HAS ALLOWED A SMALL SURGE IN UPSLOPE SHSN ACTIVITY AS IT CROSSES THE HIGHER TERRAIN. THRU SUNRISE ANOTHER INCH OR TWO ACCUMULATION IS POSSIBLE IN THE MTNS AND NRN ZONES. AS THE SECONDARY COLD FRONT CROSSES THE AREA TODAY...WE WILL SEE TEMPS NEAR FREEZING IN THE N...WITH HIGHS CLIMBING INTO THE 40S NEAR THE COAST. NW FLOW WILL BE A LITTLE GUSTY IN THE AFTERNOON BEFORE DIMINISHING OVERNIGHT.
-- End Changed Discussion --
&& .SHORT TERM /7 AM THIS MORNING THROUGH 6 PM WEDNESDAY/... TRAILING S/WV TROF CROSSING THE GREAT LAKES WILL DEVELOP A WEAK LOW PRES TONIGHT. THIS WILL CROSS VERY NEAR SRN NEW ENGLAND...BUT EXPECT ANY PRECIP TO REMAIN S OF THE FORECAST AREA. SOME CLOUD COVER MAY WORK INTO SRN ZONES...BEFORE CLEARING LATE. SURFACE RIDGING WILL TRY AND BUILD INTO THE FORECAST AREA LATE...AND MAY ALLOW FOR SOME RADIATIONAL COOLING IN THE FAVORED VALLEYS. WILL BE A CHILLY NIGHT...WITH READINGS SOME 5 TO 10 DEGREES BELOW NORMAL. A NICE CONTINUATION OF THE THEME ESTABLISHED FOR THIS MARCH SO FAR. ON WED THE ONLY FOOLS WILL BE THOSE LOOKING FOR SPRING...AS TEMPS WILL BE WELL BELOW NORMAL YET AGAIN TO START THE NEW MONTH. WITH COOL HIGH PRES IN CONTROL AND LITTLE MIXING...TEMPS WILL ONLY CLIMB INTO THE HIGH 30S NEAR THE COAST AND LOW 30S ACROSS THE NORTH COUNTRY. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... HIGH PRESSURE MOVING OVER THE REGION WEDNESDAY NIGHT WILL BRING BETTER RADIATIONAL COOLING CONDITIONS WITH TEMPERATURES FALLING INTO THE TEENS FOR MOST OF THE AREA AND LOW 20S IN SOUTHEAST NEW HAMPSHIRE. HIGH PRESSURE MOVES EAST ON THURSDAY WITH A SOUTHWEST FLOW BRINGING WARMER TEMPERATURES... MAINLY IN THE 40S. UPPER TROUGH CROSSES THE AREA THURSDAY NIGHT ALLOWING A COLD FRONT TO MOVE THROUGH THE AREA. THE FRONT WILL LIKELY STALL JUST OFFSHORE... KEEPING SHOWERY WEATHER IN THE FORECAST. LOW PRESSURE WILL MOVE NORTHEAST ALONG THE FRONT FRIDAY NIGHT INTO SATURDAY. SOME DISCREPANCY EXISTS AS TO WHETHER THIS LOW WILL TRACK NEAR THE MASSACHUSETTS/NEW HAMPSHIRE LINE OR WHETHER IT WILL TRACK OFF THE SOUTHERN NEW ENGLAND COAST. A FURTHER SOUTH TRACK WOULD ALLOW MORE OF THE PRECIPITATION ASSOCIATED WITH THE LOW TO FALL AS SNOW ACROSS NEW HAMPSHIRE AND MAINE. CURRENTLY EXPECT SNOW TO PRIMARILY BE LIMITED TO NORTHERN AREAS... THOUGH THERE IS A CHANCE THAT PRECIPITATION CHANGES TO SNOW EVEN TO THE COAST BEFORE ENDING ON SATURDAY. && .AVIATION /12Z TUESDAY THROUGH SATURDAY/... SHORT TERM...GENERALLY VFR CONDITIONS EXPECTED IN THRU WED. NW FLOW AND LINGERING MOISTURE IN THE LOW LEVELS IS LEADING TO MVFR CIGS...AND OCCASIONAL IFR VSBYS IN UPSLOPE SHSN FOR AREAS NEAR KHIE. THIS WILL DIMINISH THIS MORNING...AND EVENTUALLY ALL TERMINALS GO VFR THRU WED. GUSTS WITHIN NW FLOW AROUND 17 KTS WILL BE POSSIBLE THIS AFTERNOON AND AGAIN WED. LONG TERM...VFR CONDITIONS EXPECTED THROUGH THURSDAY. THEN SHOWERY WEATHER COULD BRING MVFR OR IFR CONDITIONS. MORE WIDESPREAD PRECIPITATION IS EXPECTED SATURDAY WITH RAIN OR SNOW LEADING TO POTENTIALLY IFR CONDITIONS. && .MARINE... SHORT TERM...SECONDARY COLD FRONT CROSSING THE WATERS EARLY TODAY WILL KEEP WINDS AND SEAS ABOVE SCA THRESHOLDS INTO THE AFTERNOON. WEAK LOW PRES WILL PASS S OF THE AREA TONIGHT...AND WILL HELP TO REINVIGORATE NW FLOW. MARGINAL SCA CONDITIONS MAY LINGER THRU WED. LONG TERM...NORTHWEST FLOW DIMINISHES AS HIGH PRESSURE CROSSES THE GULF OF MAINE THURSDAY MORNING. BUT FLOW QUICKLY SHIFTS TO THE SOUTHWEST AND STRENGTHENS AGAIN LATER ON THURSDAY WITH ADVISORY LEVEL WIND SPEEDS POSSIBLE. A FRONT WILL STALL OVER THE GULF OF MAINE FRIDAY. LOW PRESSURE MOVING ALONG THE FRONT WILL LIKELY LEAD STRENGTHEN WIND SPEEDS A BIT BUT SHOULD STAY BELOW GALE FORCE. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 3 PM EDT THIS AFTERNOON FOR ANZ150>154. && $$ NEAR TERM...LEGRO

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