330
FXUS61 KGYX 181032
AFDGYX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
632 AM EDT TUE AUG 18 2026
WHAT HAS CHANGED
AREAS OF DENSE FOG HAVE SETTLED INTO MUCH OF THE MIDCOAST SO
HAVE DECIDED TO ISSUE AN SPS HERE THROUGH 13Z. WE'VE SEEN
WIDESPREAD VISIBILITY OBSERVATIONS HERE OF A HALF MILE OR LESS.
PATCHY FOG CONTINUES ELSEWHERE. NO MAJOR CHANGES WERE NEEDED FOR
THIS UPDATE.
KEY MESSAGES
1. A WEAK COLD FRONT WILL SAG INTO THE FORECAST AREA EARLY THIS
MORNING AND STALL. THIS WILL AID IN THE DEVELOPMENT OF
SCATTERED SHOWERS TODAY. EARLY MORNING FOG WILL BE PRESENT ALSO.
A COLD FRONT APPROACHES LATE WEDNESDAY BUT WEAKENS.
2. LOW-IMPACT WEATHER IS EXPECTED MID TO LATE WEEK, WITH A
COUPLE CHANCES FOR LIGHT RAIN.
DISCUSSION
KEY MESSAGE 1 DESCRIPTION...
A WEAK COLD FRONT WILL REMAIN STALLED ACROSS THE FORECAST AREA
TODAY. AFTER EARLY MORNING FOG (SOME POSSIBLY LOCALLY DENSE)
AND A FEW SHOWERS, WE'LL EXPECT VARIABLE CLOUDS. IN ADDITION
THE WEAK FRONT SHOULD PROVIDE MODEST CONVERGENCE TO ALLOW FOR
WIDELY SCATTERED CONVECTIVE SHOWERS AND ISOLATED THUNDERSTORMS
TO DEVELOP. NOTHING STRONG OR SEVERE EXPECTED. DEWPOINT VALUES
WILL BE UP THERE THOUGH, MAKING IT FEEL QUITE MUGGY.
THE RETURN OF FOG IS EXPECTED AGAIN TONIGHT, SOME OF IT POSSIBLY
LOCALLY DENSE AS THE MOIST AIRMASS REMAINS STAGNANT.
WEDNESDAY WILL BE A WARMER DAY AND FEATURE MORE SUNSHINE AS
WELL. IT WILL ALSO BE DRIER IN TERMS OF MUGGINESS. A COLD FRONT
WILL APPROACH FROM THE WEST LATE IN THE DAY. HOWEVER, TIMING
SEEMS SUCH THAT IT WILL BE TOO LATE TO DELIVER ANY SORT OF
THUNDERSTORM ACTIVITY.
KEY MESSAGE 2 DESCRIPTION...
IF THE FRONT CONTINUES TO SLOW AS THE PARENT LOW OCCLUDES EAST
OF HUDSON BAY, THEN IT MAY WIND UP DRAPED ACROSS THE FORECAST
AREA OR JUST TO THE EAST. THIS WOULD BE THE EVENTUAL PATHWAY FOR
LOW PRESSURE ACROSS THE OHIO VALLEY TO TRACK INTO THE LATTER
HALF OF THE WEEK. THUS PRECIP CHANCES THURSDAY AND FRIDAY COULD
EVENTUALLY BE IN FLUX.
HIGH PRESSURE SHOULD BE NEARING THE REGION COME THE WEEKEND, BUT
THERE WILL BE THE COMPLICATING FACTOR OF THE SLOW MOVING
BOUNDARY EXITING, MENTIONED ABOVE, AND A POTENTIAL CUT OFF LOW
OR TROUGH ARRIVING FROM THE WEST. THE COMBINATION OF THE LOW AND
RETURN FLOW COULD SPELL FOR A DAMP PERIOD ACROSS MUCH OF THE
NORTHEAST, BUT ANTICIPATE SOME SLOWING OF THE LOW'S TRANSIT
EAST WHICH COULD HELP THE FIRST HALF OF THE WEEKEND REMAIN DRY.
AVIATION /12Z TUESDAY THROUGH SATURDAY/
THROUGH WEDNESDAY...WIDESPREAD LIFR/IFR RESTRICTIONS CONTINUE
EARLY THIS MORNING IN LOW CLOUDS AND FOG. FOG SHOULD START TO
LIFT OVER THE NEXT HOUR OR TWO. ISOLATED AFTERNOON SHOWERS MAY
LEAD TO BRIEF RESTRICTIONS BUT TIMING/COVERAGE UNCERTAINTY
PRECLUDES MENTION AT ANY SPECIFIC SITE FORECAST FOR NOW. IFR
CONDITIONS ARE ONCE AGAIN EXPECTED IN FOG TONIGHT INTO EARLY
WEDNESDAY MORNING.
OUTLOOK...
THURSDAY: MOSTLY VFR. SOME LOW CEILINGS ARE POSSIBLE NW OF THE
MOUNTAINS FOR TERMINALS SUCH AS HIE WITH SHRA. ALSO CAN'T RULE
OUT LOWER CEILINGS OR FOG TOWARDS PENOBSCOT BAY.
THURSDAY NIGHT AND FRIDAY: VFR, NO SIG WX.
SATURDAY: VFR LIKELY, NO SIG WX.
MARINE
WINDS AND SEAS LIKELY REMAIN BELOW SCA LEVELS THROUGH THE REST
OF THE WEEK. AREAS OF FOG WILL BE POSSIBLE THROUGH THURSDAY. A
COLD FRONT APPROACHES THE WATERS MIDWEEK, AS A WAVE OF LOW
PRESSURE PASSES SOUTH OF NEW ENGLAND AND INTO THE GULF OF MAINE
OR OPEN ATLANTIC. HIGH PRESSURE BUILDS IN FOR THE END OF THE
WEEK AND INTO THE WEEKEND, BEFORE ANOTHER FRONT LIKELY
APPROACHES BY LATE WEEKEND.
GYX WATCHES/WARNINGS/ADVISORIES
ME...NONE.
NH...NONE.
MARINE...NONE.
DISCUSSION...CLAIR/EKSTER/HARGROVE
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