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 241914 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 314 PM EDT MON AUG 24 2015 .SYNOPSIS...
-- Changed Discussion --
HUMID AND UNSETTLED CONDITIONS CONTINUE THROUGH MUCH OF THE WORK WEEK. ON TUESDAY...A COLD FRONT WILL SLOWLY CROSS THE REGION. THIS WILL TRIGGER MORE WIDESPREAD SHOWERS AND THUNDERSTORMS. AN UPPER LEVEL TROUGH WILL CROSS THE REGION WEDNESDAY AND THURSDAY. THIS WILL TRIGGER SCATTERED SHOWERS ONCE AGAIN AND POSSIBLY A THUNDERSTORM. HIGH PRESSURE WILL BUILD OVER NEW ENGLAND ON FRIDAY AND SATURDAY.
-- End Changed Discussion --
&& .NEAR TERM /TONIGHT/...
-- Changed Discussion --
AREAS OF FOG WILL REDEVELOP TONIGHT...ESPECIALLY ALONG AND NEAR THE COASTLINE. THERE WILL BE PATCHY DRIZZLE NEAR THE SHORELINE AS WELL DURING THE OVERNIGHT HOURS. FURTHER INLAND...PATCHY FOG IS EXPECTED...ESPECIALLY ACROSS THE VALLEY LOCATIONS. 12Z MODEL SUITE CONTINUES TO INDICATE A FEW WIDELY SCATTERED SHOWERS OVERNIGHT. HOWEVER...ANY PRECIPITATION SHOULD BE BRIEF.
-- End Changed Discussion --
&& .SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/...
-- Changed Discussion --
A COLD FRONT WILL SLOWLY CROSS NORTHERN NEW ENGLAND ON TUESDAY. SHOWERS AND STRONG THUNDERSTORMS WILL DEVELOP IN AN INCREASINGLY UNSTABLE AIRMASS. LOW LEVEL SHEAR WILL LEAD TO A FEW POSSIBLE SUPERCELLS DURING THE DAY...MAINLY OVER SOUTHERN AND CENTRAL NEW HAMPSHIRE. HAVE ADVERTISED GUSTY WINDS IN STORMS FOR NOW IN THE LATEST GRIDDED PACKAGE...HOWEVER HAIL IS A POSSIBILITY AS WELL. LATEST MESOSCALE MODELS DIFFER ON THE EXACT TIMING OF THE CONVECTION...HOWEVER THIS EVENT MAY DEVELOP DURING THE MID/LATE MORNING HOURS OVER WESTERN NEW HAMPSHIRE. WITH HIGH PRECIPITABLE WATER VALUES AND THE SLOW MOVING NATURE OF THE FRONT DUE TO SOUTHWESTERLY WINDS ALOFT...LOCALLY VERY HEAVY RAINFALL IS POSSIBLE. LOW AND MID LEVEL MOISTURE WILL BE SIGNIFICANT WITH ABNORMALLY HIGH SURFACE DEW POINTS AHEAD OF THE FRONT. FOG WILL REDEVELOP TUESDAY NIGHT ONCE AGAIN...ESPECIALLY NEAR THE COASTLINE AND IN AND AROUND AREAS THAT RECEIVED HEAVY RAINFALL DURING THE DAY.
-- End Changed Discussion --
&& .LONG TERM /WEDNESDAY THROUGH MONDAY/...
-- Changed Discussion --
SURFACE FRONTAL BOUNDARY WILL ONLY MAKE IT TO ABOUT THE MAINE AND NEW HAMPSHIRE BORDER BY WEDNESDAY MORNING... WITH WEAK LOW PRESSURE FORMING ALONG THE FRONT JUST OFFSHORE. THIS WILL AID IN THE TRANSPORT OF MOISTURE NORTHWARD AHEAD OF THE FRONT/LOW PRIMARILY IN THE FORM OF LIGHT RAIN... FOG... AND DRIZZLE. HOWEVER... SOME THUNDERSTORMS ARE ALSO POSSIBLE WITH ELEVATED INSTABILITY AVAILABLE. THE FRONT CONTINUES SLOWLY EAST DURING THE DAY... PUSHING THE SOGGY WEATHER OUT WITH IT. SHOULD SEE DRIER AIR IN PLACE THURSDAY BEHIND THE FRONT. HOWEVER... THE UPPER LEVEL TROUGH REMAINS TO THE WEST AND MAY AID IN THE DEVELOPMENT OF SOME SHOWERS THURSDAY AFTERNOON. HIGH PRESSURE BUILDS IN FROM THE WEST FRIDAY AND SATURDAY. TEMPERATURES WARM INTO THE 80S BY THIS WEEKEND WITH THE JET STREAM SHIFTED NORTHWARD KEEPING ANY PROGRESSIVE SYSTEMS TO THE NORTH.
-- End Changed Discussion --
&& .AVIATION /18Z MONDAY THROUGH SATURDAY/...
-- Changed Discussion --
SHORT TERM...AREAS OF FOG WILL REDEVELOP ALONG THE COAST THIS EVENING...WITH PATCHY DRIZZLE FORMING. THEREFORE LIFR CONDITIONS EXPECTED THROUGH EARLY TOMORROW MORNING. FURTHER INLAND...THE FOG WILL BE MORE PATCHY. CONDITIONS GRADUALLY IMPROVING TO MVFR THEN VFR TOMORROW...BEFORE MORE FOG FORMS TOMORROW NIGHT. LONG TERM...COULD SEE LIFR CONDITIONS IN FOG AND DRIZZLE FROM PORTLAND EASTWARD WEDNESDAY MORNING. THIS SHOULD IMPROVE AS THE DAY GOES ON AND THE MOIST CONDITIONS MOVE EAST. EXPECT GENERALLY VFR CONDITIONS THE REST OF THE WEEK OUTSIDE OF EARLY MORNING FOG AT LEBANON AND WHITEFIELD EACH NIGHT.
-- End Changed Discussion --
&& .MARINE...
-- Changed Discussion --
SHORT TERM...SEAS RUNNING AROUND 4 FEET AS LOW PRESSURE EXITS EAST OF HALIFAX. EXPECT CONDITIONS TO REMAIN JUST BELOW SMALL CRAFT ADVISORY LEVELS. AREAS OF DRIZZLE AND FOG WILL CONTINUE OVER THE COASTAL WATERS. LONG TERM...MOIST AIR MASS AHEAD OF A COLD FRONT WILL CONTINUE TO CONTRIBUTE TO FOG FORMATION THROUGH WEDNESDAY MORNING. THE FRONT WILL BRING DRIER AIR INTO THE GULF OF MAINE.
-- 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.