Area Forecast Discussion
Issued by NWS Portland, ME

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FXUS61 KGYX 240705
AFDGYX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
305 AM EDT SUN AUG 24 2014

.SYNOPSIS...
HIGH PRESSURE WILL HOLD OVER NEW ENGLAND TODAY THROUGH TUESDAY. A
COLD FRONT WILL DROP SOUTH THROUGH THE REGION ON WEDNESDAY
FOLLOWED BY A SECONDARY COLD FRONT ON THURSDAY WHICH WILL STALL
OVER THE AREA THURSDAY NIGHT. LOW PRESSURE WILL TRACK NORTHEAST
FROM THE GREAT LAKES ALONG THE BOUNDARY FRIDAY THROUGH SATURDAY.

&&

.NEAR TERM /THROUGH TODAY/...
SURFACE HIGH PRESSURE CENTER DRIFTS DOWN FROM EASTERN CANADA
TODAY... KEEPING SKIES SUNNY AND SHOWERS AT BAY. TEMPERATURES
AROUND 850 MB WARM TO 12-14 DEGREES C WHICH... ALONG WITH MOSTLY
SUNNY SKIES... SHOULD RESULT IN LOWER TO MID 80S AREAWIDE.

&&

.SHORT TERM /TONIGHT THROUGH 6 PM MONDAY/...
HIGH PRESSURE RELAXES SOMEWHAT AND SHIFTS SOUTH AND WEST OVERNIGHT
AS WEAK LOW PRESSURE MOVES ACROSS CANADA NORTH OF THE GREAT
LAKES... STEERED BY A WEAK SHORT WAVE. STILL EXPECTING MOSTLY
CLEAR SKIES AND LIGHT WINDS TO CONTRIBUTE TO GOOD RADIATIONAL
COOLING POTENTIAL. OVERNIGHT LOWS SHOULD DROP INTO THE 50S WITH A
FEW UPPER 40S POSSIBLE IN THE MOUNTAIN VALLEYS AND A FEW SPOTS
NEAR 60 POSSIBLE ALONG THE COAST. PATCHY FOG WILL AGAIN BE
POSSIBLE AS DEW POINT DEPRESSIONS DROP.

AN EVEN WARMER DAY IS ON TAP FOR MONDAY WITH HIGH PRESSURE
SHIFTING OFFSHORE RESULTING IN SW WINDS OVER THE REGION. 850MB
READINGS WARM TO NEAR 15 DEGREES C OVER MUCH OF THE AREA...AND
MOST LOCATIONS WILL REACH THE MID 80S WITH SOUTHERN NH AND SW
MAINE MAKING A RUN INTO THE UPPER 80S. COASTAL LOCATIONS MAY BE A
BIT COOLER THANKS TO A SEA BREEZE.

&&

.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
HIGH PRESSURE ANCHORED SOUTH OF NEW ENGLAND WILL CONTINUE TO
PUMP WARM AND HUMID AIR INTO THE REGION MONDAY NIGHT AND TUESDAY.
LOWS MONDAY NIGHT WILL BOTTOM OUT NEAR 60 AND HIGHS ON TUESDAY IN
THE LOWER TO MID 80S.

COLD FRONT WILL APPROACH FROM THE WEST TUESDAY NIGHT. MAY SEE
ENOUGH INSTABILITY CREEPING INTO NORTHERN ZONES TO KICK OFF A
SHOWER OR THUNDERSTORM...BUT THE MAJORITY OF THE FORECAST AREA
WILL SEE A DRY NIGHT.

COLD FRONT WILL WILL SLOWLY SAG SOUTH THROUGH THE REGION WEDNESDAY
BEFORE STALLING ACROSS SOUTHERN ZONES WEDNESDAY NIGHT. WILL BE
ANOTHER HOT AND MUGGY DAY WITH HIGHS ONCE AGAIN IN THE LOWER TO
MID 80S. INCREASING SHEAR DURING THE DAY MAY RESULT IN SOME SEVERE
STORMS DURING THE AFTERNOON AND EVENING HOURS.

STALLED FRONTAL BOUNDARY WILL LIKELY BE THE FOCUS FOR OVERNIGHT
SHOWERS OR THUNDERSTORMS WEDNESDAY NIGHT IN THE SOUTH. AT THE
SAME TIME SECONDARY COLD FRONT WILL APPROACH FROM THE NORTHWEST
BRINGING SHOWERS AND THUNDERSTORMS BACK INTO NORTHERN ZONES BY
THURSDAY MORNING AND THIS BOUNDARY WILL PUSH SOUTH THROUGH THE
REGION ON THURSDAY. SHOWERS AND THUNDERSTORMS WILL AGAIN BE LIKELY
SOME WHICH MAY BE SEVERE.

FRONTAL BOUNDARY FORECAST TO PUSH A LITTLE FARTHER SOUTH THURSDAY
NIGHT AS WEAK HIGH PRESSURE BUILDS IN FROM THE NORTH. EXPECT THIS
BOUNDARY TO LIFT NORTH ON FRIDAY AS LOW PRESSURE RIDES EAST FROM
THE GREAT LAKES ALONG IT. FORECAST CONFIDENCE HEADS SOUTH AT THIS
POINT AS MODELS DIVERGE BUT THE POTENTIAL IS THERE FOR A VERY WET
END OF THE WEEK.

&&

.AVIATION /07Z SUNDAY THROUGH THURSDAY/...
SHORT TERM...VFR CONDITIONS WILL PREVAIL WITH THE EXCEPTION OF
PATCHY DENSE MORNING FOG...MAINLY IN THE MOUNTAINS.

LONG TERM...VFR MONDAY NIGHT THROUGH THURSDAY.

&&

.MARINE...
SHORT TERM...NO PROBLEMS ARE NOTED OVER THE WATERS.

LONG TERM...NO PROBLEMS NOTED.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...NONE.

&&

$$

HANES/SINSABAUGH


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