269
FXUS61 KGYX 181858
AFDGYX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
258 PM EDT SAT APR 18 2026
WHAT HAS CHANGED
A COASTAL FLOOD STATEMENT HAS BEEN ISSUED FOR COASTAL CUMBERLAND
AND POINTS SOUTH FOR SPOTTY MINOR COASTAL FLOODING TONIGHT.
KEY MESSAGES
1. HIGH ASTRONOMICAL TIDES COMBINED WITH SOME SURGE MAY BRING
TOTAL WATER LEVELS TO NEAR MINOR FLOOD STAGE DURING TONIGHT'S
HIGH TIDE CYCLE. LOCALLY DENSE FOG IS ALSO POSSIBLE, ESPECIALLY
ACROSS THE COASTAL PLAIN.
2. WIDESPREAD RAINFALL IS EXPECTED ON SUNDAY WITH SOME SNOW
POSSIBLE LATE IN THE DAY ACROSS THE MOUNTAINS AND NEAR THE
CANADIAN BORDER.
3. A COOLER AND UNSETTLED PATTERN GRADUALLY MODERATES THROUGH
THE WEEK.
DISCUSSION
KEY MESSAGE 1 DESCRIPTION...
THE COMBINATION OF HIGH ASTRONOMICAL TIDES COMBINED WITH SURGE OF UP
TO AROUND 1/2 FOOT WILL BRING TOTAL WATER LEVELS TO NEAR MINOR FLOOD
STAGE DURING TONIGHT'S HIGH TIDE CYCLE. THE GREATEST THREAT WILL BE
FROM PORTLAND AND POINTS SOUTH, WHERE A COASTAL FLOOD STATEMENT HAS
BEEN ISSUED.
A DECK OF LOW CEILINGS AND FOG WILL CONTINUE TO ADVANCE NORTHWARD
THROUGH THIS EVENING FROM THE GULF OF ME, LEADING TO A CLOUDY AND
FOGGY NIGHT. LOCALLY DENSE FOG IS POSSIBLE, ESPECIALLY ACROSS THE
COASTAL PLAIN. THERE WILL ALSO BE AN INCREASING CHANCE FOR SHOWERS
TO DEVELOP TOWARDS DAWN ON SUNDAY AS LOW PRESSURE TRACKS
NORTHEASTWARD OVER SOUTHEASTERN NEW ENGLAND. LOW TEMPERATURES WILL
PRIMARILY BE INTO THE LOWER TO MIDDLE 40S.
KEY MESSAGE 2 DESCRIPTION...
LOW PRESSURE WILL TRACK ACROSS THE GULF OF ME ON SUNDAY BEFORE
EXITING TO OUR NORTHEAST OVER THE CANADIAN MARITIMES SUNDAY EVENING.
THIS AREA OF LOW PRESSURE COMBINED WITH A PASSING COLD FRONT WILL
BRING WIDESPREAD RAINFALL TO THE REGION WITH GENERALLY BETWEEN 0.25-
0.75" OF QPF EXPECTED. LOCALLY HIGHER AMOUNTS ARE POSSIBLE ACROSS
THE MOUNTAINS. A NON-DIURNAL TEMPERATURE TREND IS EXPECTED ON SUNDAY
AS THE FRONT CROSSES WITH TEMPERATURES INITIALLY INTO THE 40S
BEFORE FALLING INTO THE MIDDLE AND UPPER 30S FROM NORTHWEST TO
SOUTHEAST.
THIS MAY ALLOW FOR SOME SNOW TO MIX IN ACROSS PORTIONS OF WESTERN NH
AND EXTENDING INTO THE LAKES REGIONS OF NH/ME AND POINTS NORTHWARD.
GIVEN WARM GROUND TEMPERATURES, MARGINAL AIR TEMPERATURES, AND THE
HIGH LATE APRIL SUN ANGLE, LITTLE TO NO ACCUMULATION IS
EXPECTED OUTSIDE OF THE HIGHER TERRAIN AND NEAR THE CANADIAN
BORDER. A SLUSHY 1-3" IS POSSIBLE ACROSS THOSE LOCATIONS,
HIGHEST ABOVE 4K FT. RAIN WILL END BY SUNSET IN MOST LOCATIONS
BUT IT MAY LINGER ANOTHER FEW HOURS FROM ROUGHLY AUGUSTA AND
POINTS EAST. LOW TEMPERATURES WILL BE INTO THE 20S ACROSS THE
INTERIOR WITH LOWER 30S ALONG THE COAST AND IN THE URBAN
CORRIDORS.
KEY MESSAGE 3 DESCRIPTION...
THE WEEK STARTS OFF ON A COOL NOTE BEHIND THE COLD FRONT. AFTER
LOWS IN THE 20S AND 30S MONDAY MORNING, HIGHS RANGE FROM THE
MID 30S ACROSS THE NORTH TO NEAR 50 ALONG THE COAST. A WEAK
TROUGH SWINGS THROUGH DURING THE DAYTIME, BRINGING THE CHANCE
FOR SOME SCATTERED RAIN OR SNOW SHOWERS IN THE AFTERNOON. A
FRESH COLD AIRMASS FOLLOWS AS HIGH PRESSURE CONTINUES TO BUILD
IN, WITH LOWS RANGING FROM THE MID TEENS ACROSS THE NORTH TO MID
20S ALONG THE COAST MONDAY NIGHT.
HIGH PRESSURE CROSSES THROUGH THE NORTHEAST ON TUESDAY,
BRINGING A MAINLY SUNNY DAY WITH LIGHTER WINDS. IT ALSO MARKS
THE START OF A MODERATING TREND THROUGH THE REMAINDER ON THE
WEEK. LOWS OVER THE FOLLOWING NIGHTS WON'T BE AS COOL, WITH MID
20S ACROSS THE NORTH AND MID 30S ALONG THE COAST GENERALLY
EXPECTED.
A WARM FRONT BRINGS THE NEXT CHANCE SOME SHOWERS TO THE AREA ON
WEDNESDAY, WITH A COLD FRONT FOLLOWING LATER IN THE DAY.
HOWEVER, A WARMER AIRMASS MOVES IN FROM THE WEST BEHIND THE
FRONT, WITH HIGHS LIKELY TO MAKE A RETURN TO THE 60S FOR
THURSDAY AND FRIDAY. THE NEXT FRONT LIKELY APPROACHES THE AREA
ON FRIDAY AND INTO THE WEEKEND, BRINGING THE NEXT CHANCE FOR
SOME SHOWERS.
AVIATION /18Z SATURDAY THROUGH THURSDAY/
CEILINGS WILL LOWER FROM EAST TO WEST THIS EVENING TO IFR- LIFR
AS A STRATUS DECK ADVANCES INLAND AND FOG BEGINS TO DEVELOP. RA
WILL BEGIN FROM WEST TO EAST ON SUNDAY MORNING BETWEEN 10-14Z
(LATEST AT KAUG AND KRKD) WITH RA PERSISTING THROUGH 00Z MONDAY
ALONG WITH FG. LIGHT AND VARIABLE WINDS DURING THE MORNING WILL
BECOME NW WITH GUSTS UP 20 KTS BY EARLY AFTERNOON. CONDITIONS
WILL GRADUALLY IMPROVE SUNDAY NIGHT BUT SOME RESTRICTIONS WILL
LIKELY LINGER THROUGH 12Z MONDAY.
OUTLOOK...
MONDAY: MAINLY VFR CONDITIONS WITH NW WINDS AT 10-15 KTS DURING
THE DAYTIME BEFORE BECOMING LIGHT AND VARIABLE AT NIGHT. MVFR
OR LOWER POSSIBLE AT HIE.
TUESDAY: VFR CONDITIONS WITH LIGHT WINDS. LOWERING CEILINGS POSSIBLE
AT NIGHT.
WEDNESDAY: SHOWERS AND MVFR ARE POSSIBLE, OTHERWISE VFR CONDITIONS
CONTINUE.
THURSDAY - FRIDAY: MAINLY VFR EXPECTED.
MARINE
NW WIND GUSTS MAY APPROACH 25 KTS BEHIND A COLD FRONT ON
SUNDAY EVENING WITH 2-5 FT SEAS ACROSS THE NEAR-SHORE COASTAL
WATERS. OTHERWISE, WINDS AND SEAS WILL GENERALLY REMAIN BELOW
SCA CRITERIA THROUGH PERIOD. MARINE FOG IS LIKELY TONIGHT INTO
SUNDAY.
WINDS AND SEAS STAY BELOW SCA LEVELS AS HIGH PRESSURE BUILDS ACROSS
THE WATERS THROUGH TUESDAY. SCA CONDITIONS IN SOUTHWESTERLY FLOW ARE
THEN POSSIBLE AHEAD OF A COLD FRONT TUESDAY NIGHT AND WEDNESDAY.
BROAD HIGH PRESSURE FOLLOWS THE FRONT FOR THE END OF THE WEEK.
GYX WATCHES/WARNINGS/ADVISORIES
ME...NONE.
NH...NONE.
MARINE...NONE.
DISCUSSION...TUBBS/CLAIR
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