Skip Navigation Linkswww.nws.noaa.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service Forecast Office   NWS logo - Click to go to the NWS homepage
Gray/Portland banner image
 
 

Area Forecast Discussion
Latest Versions  [Current][-1][-2][-3][-4]



000
FXUS61 KGYX 210717
AFDGYX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
317 AM EDT SUN SEP 21 2014

.SYNOPSIS...
LOW PRESSURE OVER QUEBEC WILL DRAG A TRAILING COLD FRONT ACROSS
THE REGION LATE TODAY AND TONIGHT ACCOMPANIED BY A FEW SHOWERS AND
SCATTERED THUNDERSTORMS. AN UPPER TROUGH WILL PROVIDE LINGERING
CLOUDS AND A CHANCE OF MOUNTAIN SHOWERS ON MONDAY. A SECOND SURGE
OF COOL AIR MOVES IN ON TUESDAY AND MAY SET OFF A FEW SHOWERS IN
THE MOUNTAINS. AFTER A COOL SHOT OF AIR TUESDAY AND
WEDNESDAY...HIGH PRESSURE BUILDS TO OUR SOUTH INTO THE WEEKEND
WITH A SIGNIFICANT WARMING TREND AT THE END OF THE WEEK AND INTO
NEXT WEEKEND.

&&

.NEAR TERM /THROUGH TODAY/...
AT 06Z...A 1000 MILLIBAR LOW WAS SITUATED OVER WESTERN QUEBEC
WITH A TRAILING COLD FRONT THROUGH THE UPPER GREAT LAKES. A
STRENGTHENING SOUTHERLY FLOW PRECEDED THIS BOUNDARY ACROSS NEW
ENGLAND. WE'LL SEE VARIABLE CLOUDS ACROSS THE FORECAST AREA TODAY
IN ADVANCE OF THIS BOUNDARY. RADAR MOSAIC SHOWED SCATTERED SHOWERS
OVER SOUTHERN NEW ENGLAND THAT WILL CROSS THE COASTAL PLAIN THIS
MORNING. OTHERWISE...VARIABLE CLOUDS WITH AN INCREASING CHANCE FOR
CONVECTION THROUGH THE DAY WITH APPROACH OF FRONT AND DAYTIME
HEATING THAT WARMS TEMPERATURES INTO THE 70S.

&&

.SHORT TERM /TONIGHT THROUGH 6 PM MONDAY/...
COLD FRONT CROSSES THE AREA TONIGHT AND EXITS THE COAST BY MORNING
ACCOMPANIED BY SCATTERED SHOWERS AND ISOLATED THUNDER. ANOTHER
MILD NIGHT WITH LOWS IN THE 50S TO AROUND 60. ON MONDAY...WE'LL
SEE LINGERING CLOUDS WITH THE UPPER TROUGH ALONG WITH THE CHANCE
FOR A SHOWER ACROSS THE HIGHER TERRAIN. HIGH WILL RANGE FROM 50S
IN THE MOUNTAINS...TO NEAR 70 AT THE COAST WHERE WE'LL SEE THE
MOST SUNSHINE.

&&

.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
THE 500MB TROUGH THAT MOVES THROUGH AREA TUE INTO WED...WILL BE
THE LAST WE SEE THROUGH THE LONG TERM PERIOD AS LARGE SCALE
RIDGINGDEVELOPS ACROSS ALL BUT THE WEST COAST OF NOAM...WITH THE
RIDGE PUSHING AS FAR N AS JAMES BAY BY THE END OF THE WEEK...WHICH
WILL LEAD TO AN EXTENDED PERIOD OF SEVERAL DAYS OF ABOVE NORMAL
TEMPS THU INTO NEXT WEEKEND.

INITIALLY...WILL START OUT WITH A BIT OF COOLER AIR MON NIGHT AND
A A SECOND SURGE OF COOLER AIR TUE AS 500MB TROUGH AXIS SWINGS
THRU. IT COULD SET OFF A FEW SHOWERS IN THE MTNS TUE....AND HIGHS
WILL GENERALLY BE IN THE 60S TUE AND WED WITH LOWS IN THE MID 30S
N TO MID 40S S. AFTER THIS THE LARGE SCALE RIDGE BUILDS AND
PERSISTENT WESTERLY FLOW WILL CONTINUE TO SUPPLY WARM AIR TO THE
REGION...WITH 850MB TEMPS IN THE 10-15C RANGE. THIS SHOULD
TRANSLATE TO HIGHS IN THE 70S ACROSS THE ENTIRE CWA /NEAR 80 IN
INTERIOR SRN NH AND SW ME/ AND OVERNIGHT LOWS IN THE MID 40S TO
MID 50S. SKIES WILL BE MAINLY SUNNY AND POPS 10 PERCENT OR LESS.

&&

.AVIATION /07Z SUNDAY THROUGH THURSDAY/...
SHORT TERM...INCREASE IN LOW LEVEL TROPICAL MOISTURE WILL ADVECT
FOG AND LOW CLOUDS INTO THE AREA TODAY WITH AREAS OF MVFR...AND
LCL IFR THIS MORNING. EXPECT WIDESPREAD MVFR TONIGHT WITH LCL
IFR...THEN BECOMING VFR MONDAY WITH SCT MVFR IN SHOWERS. 

LONG TERM...MAINLY VFR...OTHER THAN VLY FOG...TUE THRU THU. 

&&

.MARINE...
SHORT TERM...MARGINAL SCA CONDITIONS WITH GUSTS TO AROUND 25 KT
AND SEAS NEAR 5 FT EXPECTED TODAY...THEN WINDS AND SEAS WILL DROP
BELOW SCA TONIGHT.

LONG TERM...SEAS FROM PRIOR PERSISTENT SW FLOW WILL START AT 5-6
FT MON NIGHT...BUT NW FLOW WILL KNOCK THESE BACK THRU TUE...AND
THEN LIGHT WESTERLY FLOW PERSISTS THRU THE END OF THE WEEK.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 7 PM EDT THIS EVENING FOR ANZ150-
     152-154.

&&

$$
SYNOPSIS...SCHWIBS/CEMPA
NEAR TERM...SCHWIBS
SHORT TERM...SCHWIBS
LONG TERM...CEMPA
AVIATION...SCHWIBS
MARINE...SCHWIBS/CEMPA



National Weather Service
Disclaimer Privacy Policy