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. --
334 FXUS61 KGYX 011909 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 309 PM EDT SUN MAY 1 2016 .SYNOPSIS...
-- Changed Discussion --
LOW PRESSURE WILL APPROACH FROM THE SOUTHWEST TONIGHT AND WILL SLOWLY CROSS THE REGION MONDAY THROUGH MONDAY NIGHT. ANOTHER AREA OF WEAK LOW PRESSURE WILL PASS SOUTH OF THE REGION ON TUESDAY. WEATHER WILL REMAIN UNSETTLED WEDNESDAY THROUGH FRIDAY AS ANOTHER AREA OF WEAK LOW PRESSURE MEANDERS OVER THE NORTHEAST.
-- End Changed Discussion --
&& .NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
LOW PRESSURE APPROACHING FROM THE SOUTHWEST WILL KEEP A WEAK OVER-RUNNING PATTERN IN PLACE OVER THE REGION TONIGHT THROUGH MONDAY. 1ST INSTALLMENT OF ASSOCIATED PRECIP ON THE WAY THROUGH THE REGION EARLY THIS AFTERNOON AND WILL CONTINUE TO SHIFT EAST INTO EASTERN PORTIONS OF THE FORECAST AREA THROUGH LATE AFTERNOOON. EXPECT STEADIER PRECIP TO TAPER TO SCATTERED SHOWERS AND AREAS OF DRIZZLE OVERNIGHT...ALTHOUGH THE MOUNTAINS MAY HANG ON TO SHOWERS FOR MUCH OF THE NIGHT IN THE VICINTY OF A STALLED FRONTAL BOUNDARY. LOWS OVERNIGHT WILL RANGE FROM THE MID TO UPPER 30S IN THE NORTH TO NEAR 40 IN THE SOUTH.
-- End Changed Discussion --
&& .SHORT TERM /MONDAY THROUGH MONDAY NIGHT/...
-- Changed Discussion --
FRONTAL BOUNDARY WILL SAG SOUTH INTO SOUTHERN NEW ENGLAND ON MONDAY AS LOW PRESSURE TRACKS NORTHEAST THROUGH THE REGION. EXPECT RAIN FOR MUCH OF THE DAY BEFORE TAPERING OFF MONDAY EVENING. HIGH TEMPS WILL RANGE THROUGH THE 40S TO NEAR 50. FRONTAL BOUNDARY WILL STALL OVER SOUTHERN NEW ENGLAND MONDAY NIGHT AS ANOTHER WAVE TRACKS NORTHEAST ALONG IT. THIS MAY BRING ANOTHER ROUND OF SHOWERS TO SOUTHERN NEW HAMPSHIRE AND COASTAL MAINE TOWARD DAYBREAK ON TUESDAY AS DIPICTED IN THE NEW GFS BUT ECMWF KEEPS THIS PRECIP SOUTH OF THE REGION SO JUST GOING WITH LOW CHANCE POPS FOR AFTER MIDNIGHT MONDAY NIGHT IN SOUTHERN AND COASTAL ZONES. FARTHER NORTH...EXPECT PARTIAL CLEARING OVERNIGHT. LOW TEMPS WILL RANGE FROM THE MID 30S TO MID 40S.
-- End Changed Discussion --
&& .LONG TERM /TUESDAY THROUGH SATURDAY/...
-- Changed Discussion --
SURFACE LOW PRESSURE MOVES EAST OF THE FORECAST AREA TUESDAY WHICH WILL LEAVE A FRONT STATIONARY TO OUR SOUTH. MODELS FORM A SERIES OF LOW PRESSURE CENTERS ON THIS FRONT AND MOVE THEM IS SUCCESSION OFF TO THE NORTHEAST THROUGH THURSDAY. THE IS THE ONLY MODEL TO MOVE PRECIPITATION UP INTO SOUTHERN PORTIONS OF MAINE AND NEW HAMPSHIRE ON TUESDAY WITH OVER A HALF INCH OF RAIN TUESDAY. USED A BLEND OF MODELS TO TONE THIS DOWN TO LESS THAN 30 PERCENT CHANCE. ON THURSDAY A DIGGING TROUGH REACHES THE MID ATLANTIC COAST FRIDAY. THIS WILL BE CUTOFF FROM THE MAIN FLOW WITH MANY SURFACE LOWS. IT IS QUITE IMPOSSIBLE TO TELL WHERE THE MAIN SURFACE LOW WILL DEVELOP AND THE OVERALL TRACK AT THIS TIME. THE MODELS ARE ALL SIMILAR BUT DIFFER IN THE DETAILS. THIS WILL LIKELY CONTINUE FOR THE NEXT SEVERAL RUNS.
-- End Changed Discussion --
&& .AVIATION /18Z SUNDAY THROUGH FRIDAY/...
-- Changed Discussion --
SHORT TERM...IFR/LIFR CEILINGS DEVELOP OVERNIGHT AND PERSIST THROUGH MONDAY. BECOMING VFR MONDAY NIGHT WITH AREAS OF MVFR/IFR CEILINGS IN SOUTHERN ZONES. LONG TERM...EXPECT MVFR IN SOUTHERN AREAS EARLY TUESDAY THEN IMPROVEMENT. EXPECT SOME FOG TO DEVELOP TUESDAY NIGHT WITH MVFR/IFR POSSIBLE. EXPECT MVFR/IFR OFF AND ON THROUGH FRIDAY IN AREAS OF SHOWERS AND FOG.
-- End Changed Discussion --
&& .MARINE...
-- Changed Discussion --
SHORT TERM...NO FLAGS. LONG TERM...WINDS ARE EXPECTED TO REMAIN BELOW SCA CRITERIA... HOWEVER A PERSISTENT EASTERLY TO NORTHEAST FLOW WILL INCREASE SEAS.
-- End Changed Discussion --
&& .FIRE WEATHER...
-- Changed Discussion --
SOME MUCH NEEDED WETTING RAINS EXPECTED TONIGHT THROUGH MONDAY. NO FIRE ISSUES ANTICIPATED.
-- End Changed Discussion --
&& .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$

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