Area Forecast Discussion
Issued by NWS Portland, ME

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000
FXUS61 KGYX 240748
AFDGYX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
348 AM EDT SUN MAY 24 2015

.SYNOPSIS...
HIGH PRESSURE SHIFTS TO OUR SOUTH TODAY AND WILL WILL PROVIDE
FAIR AND WARMER WEATHER INTO MEMORIAL DAY. A WARM FRONT WILL
CROSS THE AREAS MONDAY NIGHT AND TUESDAY....PROVIDING A CHANCE FOR
SHOWERS AND STORMS. WARM AND MORE HUMID CONDITIONS ARE EXPECTED
MID TO LATE WEEK.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
AS HIGH PRES SETTLES S OF NEW ENGLAND...WLY RETURN FLOW WILL HELP
TO WARM UP THE FORECAST AREA NICELY TODAY. WIDESPREAD 70S ARE
EXPECTED...WITH POCKETS OF 80S FROM KASH TO KCON AND EWD TO KSFM.
DESPITE THE ADVECTION OF HIGHER DEWPOINTS THAN YESTERDAY...THE
WARM TEMPS WILL OFFSET THAT AND KEEP RH VALUES BELOW 30 PERCENT.
CONTINUED GUSTY WLY WINDS WILL MEAN FIRE DANGER WILL STAY ELEVATED
FOR AT LEAST ANOTHER DAY.

A NRN STREAM S/WV TROF WILL BRUSH THE FORECAST AREA LATER
TODAY...AND MAY HELP TRIGGER A FEW SHOWERS ACROSS THE NRN ZONES.
MESOSCALE MODEL FORECASTS FAVOR ENOUGH GRAUPEL DEVELOPMENT FOR
SOME ISOLD THUNDER...SO HAVE ALSO ADDED THIS TO THE FORECAST.

&&

.SHORT TERM /TONIGHT THROUGH MONDAY/...
RETURN FLOW CONTINUING OVERNIGHT WILL KEEP TEMPS MUCH MILDER THAN
THE PAST COUPLE OF NIGHTS. BY MON A WARM FRONT WILL TRY AND LIFT
THRU THE FORECAST AREA. INCREASING DEWPOINTS FROM THE SW ADVECTING
OVER THE COLD GULF OF ME WILL LIKELY SUPPORT LOW STRATUS
DEVELOPMENT. AT THIS TIME WIND DIRECTION LOOKS TO KEEP THAT MOSTLY
OFFSHORE...BUT WILL HAVE TO MONITOR TOWARDS THE END OF THE PERIOD.

ANOTHER FEATURE TO WATCH WILL ALSO BE LATE DAY CONVECTION ACROSS
THE UPPER MIDWEST TODAY. MODEL FORECASTS SHOW AN AREA DEVELOPING
AND MOVING NEWD INTO THE GREAT LAKES OVERNIGHT. SOME OF THE MORE
AGGRESSIVE FORECASTS...LIKE THE GFS...BRING THIS OVER THE RIDGE
AND INTO PARTS OF NEW ENGLAND FOR MON. FOR NOW HAVE INCREASED POP
IN THE MTNS DURING THE DAY.

&&

.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
LARGE 500MB RIDGE BUILDS IN EARLY IN THE WEEK AND OVERRUNS CLOSED
LOW TO THE SOUTH SETTING UP REX BLOCK THRU THE END OF THE
WEEK...LEADING TOP A WARM AND HUMID CONDITIONS INTO EARLY NEXT
WEEKEND.

INITIALLY ON MON NIGHT A WEAK WAVE RIDES OVER THE TOP OF THE
RIDGE AND PUSHES LOW-MID LVL WARM FRONT SW-NE THRU THE AREA. AS
IS OFTEN THE CASE AS THE WAVE ENCOUNTERS THE RIDGE IT FLATTENS OUT
AND DYNAMICS WEAKEN AS THE WAA MOVES THRU. SO BEST CHC OF OF ANY
SHRA/TSRA WILL BE IN THE NRN AND WRN ZONES...WITH COASTAL AREAS
ONLY SEE A SLIGHT CHC OF RAIN FROM THIS FRONT. THE FRONT LINGERS
INTO TUE MORNING...BUT RIDGING BUILDS QUICKLY BEHIND THIS FRONT
AND EXPECT PARTIAL CLEARING AT LEAST AND WARMING TEMPS TUE
AFTERNOON WITH HIGHS 80-85 INLAND AND 70S ON THE COAST. WITH TDS
RISING INTO THE LOW-MID 60S. AFTER A MUGGY TUE NIGHT WITH LOWS
MAINLY IN THE UPPER 50S TO MID 60S...WEDNESDAY LOOKS TO BE THE
WARMEST DAY OF THE WEEK AS HIGHS CLIMB SECURELY IN THE 80S...WITH
A FEW SPOTS IN SRN NH MAKING A RUN AT 90. A WEAK FRONT MOVES IN
FROM THE NW WED AFTERNOON...BUT THE TREND IS FOR IT TO STALL OR
WASH OUT BEFORE IT REACHES THE CWA...AT LEAST ACCORDING TO THE 00Z
EURO. STILL COULD SET OFF SOME SOME CONVECTION IN THE MOUNTAINS
WED AFTERNOON.

FOR THU-SAT WE WILL BE SITTING ON THE ANTICYCLONIC SIDE OF THE 500
MB JET...AND WILL HAVE TO WATCH FRO SOME WAVES MOVING THRU THE
FLOW. WHICH COULD SET OFF SHRA/TSRA AT LEAST ONE DAY DURING THAT
TIMEFRAME...BUT MODELS ARE NOT CONSISTENT ENOUGH WITH ANY FEATURE
TO NAIL DOWN THESE WAVES AT THIS TIME. IT WILL STAY WARM AND HUMID
THRU THIS PERIOD WITH HIGHS LOW-MID 80S INLAND AND IN THE 70S ON
THE COAST.

&&

.AVIATION /07Z SUNDAY THROUGH THURSDAY/...
SHORT TERM...VFR CONDITIONS TO PREVAIL THRU MON. GUSTY WLY WINDS
EXPECTED TODAY...WITH GUSTS AROUND 25 KTS AT TIMES AT ALL
TERMINALS. THERE IS THE POSSIBLY THAT INCREASING MOISTURE
ADVECTION OVER THE WATERS WILL SUPPORT SOME LOW STRATUS
DEVELOPMENT LATER MON. THIS IS A LOW CONFIDENCE FORECAST AT THIS
TIME HOWEVER.

LONG TERM...MVFR OR IFR IN SHOWERS IS POSSIBLE MONDAY
NIGHT...OTHERWISE MAINLY VFR TUE-THU. SCT TSRA ARE POSSIBLE WED
AND THU AFTERNOON..E.SPECIALLY AWAY FROM THE COAST.

&&

.MARINE...
SHORT TERM...OVERLAND TEMPS ARE EXPECTED TO WARM NICELY
TODAY...ALLOWING FOR DEEPER MIXING NEAR-SHORE. OCCASIONAL GUSTS OF
25 KTS ARE POSSIBLE FOR THE BAYS AS A RESULT. ON THE OUTER WATERS
THE CONTINUED WLY FLOW WILL KEEP SEAS NEAR 5 FT WITH GUSTS AROUND
20 KTS AT TIMES. GIVEN THE HOLIDAY WEEKEND AND INCREASED
RECREATION ON THE WATERS A SCA HAS BEEN ISSUED THRU THIS EVENING.

LONG TERM...HIGH PRESSURE BUILDS SOUTH OF THE WATERS THIS
WEEK...BUT WEAK WAVES OF LOW PRESSURE WILL PASS N OF NEW ENGLAND
AND COULD ENHANCE SW FLOW AT TIMES THAT WINDS/SEAS APPROACH SCA
LEVELS.

&&

.FIRE WEATHER...
RETURN FLOW WILL HELP INCREASE DEWPOINTS ACROSS MUCH OF THE AREA
TODAY. HOWEVER...WARMING TEMPERATURES WILL KEEP RELATIVE
HUMIDITIES BELOW 30 PERCENT. GUSTY WESTERLY WINDS WILL KEEP FIRE
DANGER ELEVATED TODAY. HIGHEST TEMPERATURES AND LOWEST RELATIVE
HUMIDITY VALUES ARE EXPECTED ACROSS SOUTHERN NEW HAMPSHIRE. BY
MONDAY HIGHER MOISTURE IN THE AIR MASS WILL KEEP RELATIVE
HUMIDITIES ABOVE 30 PERCENT...AS A WARM FRONT LIFTS THROUGH THE
AREA WITH SCATTERED SHOWERS.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...SMALL CRAFT ADVISORY FROM 10 AM THIS MORNING TO 8 PM EDT THIS
     EVENING FOR ANZ151-153.
     SMALL CRAFT ADVISORY FROM 10 AM THIS MORNING TO 2 AM EDT
     MONDAY FOR ANZ150-152-154.

&&

$$

NEAR TERM...LEGRO
SHORT TERM...LEGRO
LONG TERM...CEMPA
AVIATION...CEMPA/LEGRO
MARINE...CEMPA/LEGRO
FIRE WEATHER...LEGRO



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