Area Forecast Discussion
Issued by NWS Portland, ME

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000
FXUS61 KGYX 220958
AFDGYX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
558 AM EDT MON SEP 22 2014

.SYNOPSIS...
A COLD FRONT WILL EXIT THE COAST THIS MORNING. AN UPPER TROUGH
WILL PROVIDE SOME LINGERING CLOUDS TODAY AS WELL AS SCATTERED
SHOWERS ACROSS THE HIGHER TERRAIN. HIGH PRESSURE WILL BRING A
SHOT OF COOLER AIR FOR TUESDAY AND WEDNESDAY. THIS RIDGE OF HIGH
PRESSURE WILL CONTINUE TO BUILD OVER THE REGION LATE IN THE WEEK
AND THROUGH THE WEEKEND WITH A A SIGNIFICANT WARMING TREND
EXPECTED.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...

550 AM...I DROPPED THE DENSE FOG ADVISORY FOR THE AREA AS
VISIBILITIES CONTINUE TO IMPROVE. OTHERWISE...1ST PERIOD GRIDS
WERE ADJUSTED BASED ON MESONET AND RADAR TRENDS.

PREV DISC...
AT 06Z...A 997 MILLIBAR LOW WAS CENTERED OVER SOUTHEAST QUEBEC
WITH A TRAILING COLD FRONT THROUGH WESTERN NEW ENGLAND AND A
SECONDARY FRONT THROUGH EASTERN NEW YORK STATE. NATIONAL WEATHER
SERVICE DOPPLER RADAR MOSAIC SHOWED A BAND OF SHOWERS ALONG AND
AHEAD OF THE FRONTAL BOUNDARY ACROSS THE FORECAST AREA. THE FRONT
AND SHOWERS SHOULD CLEAR THE COAST THIS MORNING WITH GUSTY
WESTERLY FLOW IN ITS WAKE. INSTABILITY WITH UPPER TROUGH SHOULD
PROVIDE A GOOD DEAL OF CLOUDS TODAY WITH ANY SHOWERS CONFINED TO
THE HIGHER TERRAIN. COOLING COLUMN SPELLS A RAIN/SNOW MIX OR WET
SNOW FOR THE HIGHEST TERRAIN STARTING LATE TODAY. HIGHS RANGE FROM
NEAR 60 IN THE MOUNTAIN VALLEYS TO AROUND 70F AT THE COAST.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM TUESDAY/...
HIGH PRESSURE CONTINUES TO SLOWLY BUILD EAST TONIGHT WITH THE
LIGHT DOWNSLOPING WINDS CONTINUING...SO CLOUDS WILL LINGER IN THE
MOUNTAINS BUT SKIES SHOULD BECOME MOSTLY CLEAR ELSEWHERE. MUCH
COOLER TONIGHT WITH LOWS IN THE 30S ACROSS THE MOUNTAINS AND IN
THE 40S ELSEWHERE.

ON TUESDAY...A WEAK FRONT AND REINFORCING SHOT OF COOL AIR SPELLS
A FEW CLOUDS MAINLY ACROSS THE HIGH TERRAIN ALONG WITH WIDELY
SCATTERED SHOWERS. HIGHS WILL BE MAINLY IN THE 60S...WITH A FEW
50S ACROSS MOUNTAIN SECTIONS.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
HIGH PRESSURE WILL REMAIN ANCHORED OVER NEW ENGLAND THROUGH THE
PERIOD AND FULLY UNDER CONTROL OF OUR WEATHER. THIS WILL ALLOW FOR
A PROLONGED PERIOD OF DRY...SUNNY CONDITIONS DURING THE DAY AND
CLEAR SKIES DURING THE NIGHTTIME PERIODS. LATE NIGHT FOG WILL BE
LIKELY OVER THE INTERIOR VALLEYS EACH NIGHT...ESPECIALLY OVER THE
CT RIVER VALLEY.

THERE WILL ALSO BE A MODERATION TREND WITH TEMPERATURES HEADING
INTO THIS UPCOMING WEEKEND. EXPECT WIDESPREAD 70S DURING THE DAY
BY THE END OF THE WORKWEEK.

&&

.AVIATION /10Z MONDAY THROUGH FRIDAY/...
SHORT TERM...MAINLY IFR/LIFR CONDS EXPECTED EARLY THIS MORNING IN
STRATUS...FOG...AND SHOWERS. IMPROVING TO VFR THIS MORNING
THROUGHOUT. WEST WINDS WILL GUST BTWN 20 AND 25 KT DURING THE
DAYLIGHT HOURS TODAY. LCL IFR IS POSSIBLE TOWARDS DAWN TUESDAY IN
VALLEY STRATUS AND FOG.

LONG TERM...HIGH PRESSURE WILL REMAIN ANCHORED OVER THE REGION
DURING THE LONG TERM. THIS WILL ALLOW FOR MOSTLY VFR
CONDITIONS...HOWEVER PATCHY DENSE LATE NIGHT FOG MAY ALLOW FOR
ISOLD LIFR CONDITIONS ACROSS SOME OF THE INTERIOR VALLEYS.

&&

.MARINE...
SHORT TERM...SCA FOR HAZARDOUS SEAS CONVERTED TO AN SCA AS WE SEE
MARGINAL GUSTS TO NR 25 KT AS WELL AS SEAS NR 5 FT INTO TONIGHT.

LONG TERM...WINDS AND SEAS WILL REMAIN BELOW SCA LEVELS.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT TUESDAY FOR ANZ150>154.

&&

$$
ES


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