Area Forecast Discussion
Issued by NWS Portland, ME

Current Version | Previous Version | Text Only | 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
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KGYX 281905 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 305 PM EDT TUE JUL 28 2015 .SYNOPSIS... WARM AND HUMID AIR WILL REMAIN OVER MAINE AND NEW HAMPSHIRE FOR THE NEXT FEW DAYS. SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE MAINLY DURING THE LATE AFTERNOON AND EVENING HOURS TODAY... WITH SOME SEVERE THUNDERSTORMS POSSIBLE. A COLD FRONT WILL CROSS THE REGION ON THURSDAY WITH MORE THUNDERSTORMS POSSIBLE. A WEAK DISTURBANCE MAY BRING A FEW SHOWERS TO THE MOUNTAINS FRIDAY. UPPER LEVEL TROUGH REMAINS IN PLACE THROUGH EARLY NEXT WEEK BRINGING PERIODIC FRONTAL PASSAGES AND UNSETTLED WEATHER. && .NEAR TERM /THROUGH TONIGHT/... SCATTERED CONVECTION WILL CONTINUE INTO THE EVENING HOURS IN VICINITY OF WEAK SURFACE FRONT...ACROSS OUR NORTHERN AND EASTERN FORECAST AREA WITH CELLS OCCASIONALLY PRODUCING DAMAGING WINDS AND MARGINALLY SEVERE HAIL. ELSEWHERE...ACTIVITY SHOULD BE WIDELY SCATTERED. CONVECTION SHOULD END BY LATE EVENING WITH LOSS OF DAYTIME HEATING. OVERNIGHT...EXPECT PARTLY CLOUDY SKIES WITH PATCHY FOG DEVELOPING. && .SHORT TERM /WEDNESDAY THROUGH WEDNESDAY NIGHT/... STALLED FRONTAL BOUNDARY SITUATED FROM NORTHERN NEW HAMPSHIRE EASTWARD TO MID COAST MAINE COULD SERVE AS THE FOCUS FOR WIDELY SCATTERED SHOWERS AND THUNDERSTORMS AGAIN TOMORROW. OTHERWISE...A MOSTLY SUNNY AND HOT DAY WITH HIGHS IN THE 80S AND LOWER 90S...BUT TEMPERED A BIT NEAR THE COAST AS THE FLOW TURNS ONSHORE BY AFTERNOON. ANY CONVECTION SHOULD ONCE AGAIN DIE OFF BY LATE EVENING WITH PARTLY CLOUDY SKIES AND PATCHY FOG DEVELOPING OVERNIGHT. LOW TEMPERATURES SHOULD BE MAINLY IN THE 60S. && .LONG TERM /THURSDAY THROUGH MONDAY/... 500 MB PATTERN BECOMES MORE WEAKLY AMPLIFIED INTO THE WEEKEND AND NEXT WEEK...WITH A TREND BACK TOWARD TOUGHING OVER HUDSON BAY. HOWEVER...THE WEAK AMPLIFICATION WILL TEND TO KEEP THE COOLER AIR NORTH OF THE BORDER AND ALLOW WARM AIR TO REMAIN IN PLACE OVER NEW ENGLAND...SO TEMPS WILL REMAIN ABOVE NORMAL THRU THE PERIOD. ALSO...GIVEN THE PROXIMITY OF THE 500 MB TROUGH WILL SEE SEVERAL WAVES MOVE THRU THE FLOW...WHICH WILL MEAN A FEW ROUNDS OF SHRA/TSRA...MOSTLY FOCUSED AROUND MAX DAYTIME HEATING IN THE AFTERNOON AND EARLY EVENINGS. THE EXTENDED FORECAST HAS A LOT OF CHC POPS...ESECIALLY IN THE NORTH...BUT NO DAY IS LIKELY TO BE A WASHOUT...AND AN OVERALL DRIER PATTERN WILL PERSIST. SPECIFICALLY A COLD FRONT COMES THRU LATE THU AND WILL PRODUCE SOME SHRA/TSRA...MAINLY THU AFT INTO EVE. PRE-FRONTAL SHOULD START THE DAY WITH ONSHORE FLOW ALONG THE COAST...AND THIS WILL KEEP THINGS COOLER ON THE COASTAL PLAIN...ESPECIALLY EAST OF PWM...WHERE HIGHS WILL BE CLOSER TO 80. INLAND AREAS TO THE S AND W OF PORTLAND WILL ONCE AGAIN RISE TO THE UPPER 80S AND LOWER 90S AHEAD OF THE FRONT. COULD SEE SOME STRONG TO SEVERE STORMS ONCE AGAIN WITH THIS FRONT...MAINLY AWAY FROM THE COAST. BEHIND THE FRONT...WILL SEE T/TD DROP OFF SOME ON FRIDAY...AND SFC RIDGING WILL KEEP THINGS DRY...BUT HIGHS STILL IN THE MID TO UPPER 80S IN THE S...AND LOW 80S IN THE MTNS AND ON THE COAST. GENERALLY HAVE AFTERNOON CHC POPS IN THE N AND SLY POPS TOWARD THE COAST BOTH SAT AND SUN AS WEAK WAVES MOVE THRU THE ALMOST ZONAL FLOW ALOFT. TEMPS WILL BE CLOSER TO NORMAL OVER THE WEEKEND, BUT STILL ON THE WARM SIDE. FLOW SHIFTS MORE SW EARLY NEXT WEEK AND THINGS WARM UP A BIT AGAIN. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... SHORT TERM /THROUGH 11Z THU/...SCT MVFR IN SHRA WITH BRIEF LCL IFR PSBL IN +TSRA. AREAS OF MVFR OVERNIGHT IN STRATUS AND FOG WITH LCL IFR PSBL BTWN 08 AND 12Z WEDNESDAY. VFR WED WITH LCL MVFR PSBL AFT 18Z IN WIDELY SCT SHRA AND TSRA VCNTY OF KAUG AND KRKD. AREAS MVFR AFT 00Z THU IN STRATUS AND FOG WITH LCL IFR PSBL BTWN 08 AND 12Z THU. LONG TERM...MAINLY VFR THU-SUN. TSRA A GOOD BET THU AFTERNOON...ESPECIALLY AT INLAND TERMINALS. MAY SEE A BREAK FROM VLY FOG THU NIGHT...BUT SHOULD RETURN FRI AND SAT NIGHT. && .MARINE... SHORT TERM /THROUGH WEDNESDAY NIGHT/...WEAK PRESSURE GRADIENT SHOULD KEEP WINDS AND SEAS BELOW SMALL CRAFT THRESHOLD. LONG TERM...WEAK FLOW WILL GENERALLY CONTINUE THU THRU SUN...AND KEEP SEAS/WINDS COMFORTABLY BLO SCA LVLS. ONLY EXCEPTION MAY BE LATE THU AND THU NIGHT AS SW FLOW SURGES A HEAD OF A COLD FRONT AND COULD APPROACH SCA BRIEFLY. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$ SCHWIBS/CEMPA

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