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 252248 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 648 PM EDT WED MAR 25 2015 .SYNOPSIS... A WARM FRONT WILL APPROACH THE REGION TONIGHT AND MOVE THROUGH THURSDAY MORNING. LOW PRESSURE WILL MOVE NORTHEAST THURSDAY AFTERNOON AND MOVE THROUGH THE REGION THURSDAY NIGHT AND PUSH A COLD FRONT OFF THE COAST FRIDAY. HIGH PRESSURE WILL BUILD IN SATURDAY AFTERNOON AND SUNDAY. A COLD FRONT WILL WILL MOVE THROUGH NORTHERN NEW ENGLAND MONDAY. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
-- Changed Discussion --
645 PM...FORECAST UPDATES INCLUDES TWEAKS TO TIMING OF PRECIP WITH INITIAL WAA AND FOCUSING IT AROUND THIS EVENING. ALSO...BIG T/TD SPREADS SHOULD KEEP PRECIP FROM RACHING THE GROUND INITIALLY AND ALSO WILL WET BULB ENOUGH TO MIX WITH SOME IP/SN IN MOST PLACES...FOR A BRIEF PERIOD ANYWAY...BUT MOST PLACES ON THE COASTAL PLAIN WILL MOVE TO RAIN FARILY QUICKLY. IN THE HILLS AND MTNS COULD SEE A LONGER PERIOD OF SN/IP...BUIT ACCUMS WILL BE CLOSER TO A COATING OUTSIDE OF THE MTNS. IN THE MTNS COULD SEE UP TO AN INCH OF SNOW BEFORE IT MIXES WITH OR CHANGES TO RA...AND MAY EVEN BE A FEW SPOTS HERE WHERE IT WILL END AS A SHORT PERIOD FZRA LATE TONIGHT. PREVIOUSLY...WATER VAPOR AND IR IMAGERY SHOW WARM AIR ADVECTION REGIME IN ASSOCIATION WITH AN APPROACHING FROM THE SW. S FLOW TODAY HAS GONE A LONG WAY IN SATURATING THE COLUMN AND SHOWERS HAVE BEGUN IN NEW YORK STATE ALREADY. TEMPERATURES HAVE WARMED UP NICELY TODAY AND WILL FALL ONLY A FEW DEGREES TONIGHT BEFORE INCREASING AGAIN AS THE WARM FRONT ARRIVES. THE FIRST WAVE OF PRECIPITATION WILL MOSTLY FALL AS RAIN BUT THERE MAY BE SOME SNOW AND SLEET MIXING IN.
-- End Changed Discussion --
&& .SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/... PRECIP DIMINISHES AFTER MIDNIGHT AS DRY AIR WORKS IN FROM THE SW BEHIND THE INITIAL CYCLONE. THURSDAY WILL BE WARM... IN THE 40S AND 50S... AND HUMID AS WELL MAKING IT SEEM EVEN WARMER THAN IT IS. THERE WILL ONLY BE A FEW HOURS IN THE MORNING HOURS WITHOUT PRECIP BEFORE THE NEXT ROUND ARRIVES. THE DEEP TROUGH CURRENTLY POSING A SEVERE WEATHER THREAT IN THE PLAINS TRANSLATES EAST TOWARDS THE GREAT LAKES BY EARLY THURSDAY AFTERNOON. THIS WILL PROMPT SECONDARY CYCLOGENESIS NEAR THE JERSEY COAST. A STRONG SPRINGTIME UPPER LEVEL JET WILL HELP PUSH A COLD FRONT THROUGH THURSDAY NIGHT. THERE IS A HIGHER CHANCE FOR ACCUMULATING SNOW AS PRECIPITATION INTERACTS WITH THE ANAFRONT SET UP...STILL LESS THAN ADVISORY CRITERIA AND MOSTLY CONFINED TO THE MOUNTAINS. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... MODELS ARE IN GOOD AGREEMENT THROUGH THE WEEKEND INTO NEXT WEEK. A COLD FRONT WILL SLIP OFF THE COAST FRIDAY. MODELS SHOW UPPER LEVEL SHORT WAVE HANGING BACK BEHIND THE FRONT WILL MOVE THROUGH SATURDAY SO HAVE INTRODUCED A SLIGHT CHANCE OF RAIN/SNOW SHOWERS FOR SOUTHERN NEW HAMPSHIRE THEN. HIGH PRESSURE BUILDS SATURDAY AFTERNOON AND SUNDAY. NEXT A COLD FRONT APPROACHES MONDAY WITH THE GFS PUSHING A SURFACE LOW THROUGH NORTHERN NEW ENGLAND MONDAY AFTERNOON. THE ECMWF KEEPS MAIN SURFACE LOW TO OUR NORTH IN SOUTHERN CANADA WITH ANOTHER LOW DEVELOPING WELL EAST OF OUR AREA WEDNESDAY. && .AVIATION /00Z THURSDAY THROUGH MONDAY/... SHORT TERM...SCATTERED SHRA/SHSN WILL BRING MVFR CONDITIONS OR LOWER TO THE REGION BEGINNING 00Z TONIGHT. DEEP MOISTURE CONTINUES AND DOES NOT IMPROVE MUCH BEFORE THE NEXT ROUND OF PRECIPITATION THURSDAY AFTERNOON. LONG TERM...EXPECT VFR CONDITIONS FRIDAY THROUGH MONDAY. SOME ISOLATED MVFR POSSIBLE SATURDAY IN SOUTHERN NEW HAMPSHIRE IN RAIN/SNOW SHOWERS. && .MARINE... SHORT TERM...SCA ADVISORY REMAINS IN EFFECT THROUGH TOMORROW MORNING AND WILL LIKELY BE EXTENDED FOR WAVES. LONG TERM...SCA WINDS POSSIBLE SATURDAY. && .HYDROLOGY... WARMER WEATHER AND ONE HALF TO THREE QUARTERS OF AN INCH OF RAIN WILL INDUCE SOME RUNOFF IN SOUTHERN LOCATIONS. WILL LIKELY SEE SOME RISES ON SOUTHERN RIVERS. AT THE CURRENT TIME DONT EXPECT ANY ISSUES. WILL HAVE TO MONITOR FOR ICE MOVEMENT THOUGH. && .GYX WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 8 AM EDT THURSDAY FOR ANZ153. SMALL CRAFT ADVISORY UNTIL NOON EDT THURSDAY FOR ANZ150>152- 154.
-- End Changed Discussion --
&& $$ SYNOPSIS... NEAR TERM...CEMPA SHORT TERM... LONG TERM... AVIATION... MARINE... HYDROLOGY...

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