Area Forecast Discussion
Issued by NWS Portland, ME

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS61 KGYX 040704
AFDGYX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
304 AM EDT SAT JUL 4 2015

.SYNOPSIS...
HIGH PRESSURE WILL SLIDE WELL OFFSHORE TODAY. LOW PRESSURE WILL
PASS TO OUR SOUTH AND COULD BRING A STRAY SHOWER TO THE CONNECTICUT
VALLEY AND SOUTHWEST NEW HAMPSHIRE TODAY. A WEAK TROUGH OF LOW
PRESSURE WILL CROSS THE AREA LATE TONIGHT AND SUNDAY ACCOMPANIED
BY SCATTERED SHOWERS. HIGH PRESSURE BRINGS DRY WEATHER AND
GRADUALLY WARMING CONDITIONS THROUGH MIDWEEK. ANOTHER PASSING
TROUGH WILL BRING THE NEXT CHANCE OF RAIN MIDWEEK.

&&

.NEAR TERM /THROUGH TODAY/...
AT 06Z...HIGH PRESSURE WAS CENTERED OVER SOUTHEAST NEW ENGLAND. A
1010 MILLIBAR LOW WAS VICINITY OF THE DELMARVA. FOR TODAY...CLOUDS
SPREAD NORTH AND EAST WITH APPROACH OF UPPER TROUGH WITH SURFACE
LOW PASSING OFFSHORE TO OUR SOUTH. ALONG WITH THE CLOUDS...A FEW
SHOWERS MAY MAKE A RUN AT THE CONNECTICUT VALLEY AND EXTREME SOUTHWEST
NEW HAMPSHIRE TODAY. OTHERWISE...WE SHOULD REMAIN DRY ACROSS THE
AREA FOR THE HOLIDAY. HIGH TEMPERATURES TODAY WILL BE MAINLY IN
THE 70S.

&&

.SHORT TERM /TONIGHT AND SUNDAY/...
A SURFACE TROUGH WILL APPROACH FROM THE NORTH AND WEST TONIGHT
THEN CROSS THE REGION ON SUNDAY. CAN`T RULE OUT SCATTERED
CONVECTION WITH THIS FEATURE OVERNIGHT...AND ESPECIALLY DURING THE
DAY ON SUNDAY. HIGHS TOMORROW WILL RANGE FROM THE 70S IN THE
MOUNTAINS TO A FEW DEGREES EITHER SIDE OF 80F ELSEWHERE.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
UPPER TROUGH MOVES EAST AND IS REPLACED BY AN UPPER RIDGE. ANY
LINGERING SHOWERS SUNDAY NIGHT WILL DISSIPATE OR MOVE EAST IN THE
EVENING. HIGH PRESSURE BUILDS IN AT THE SURFACE. AS THE RIDGE
BUILDS OVER THE AREA TEMPERATURES WILL BE WARMING ALOFT AND
EVENTUALLY AT THE SURFACE AS WELL. ON MONDAY THERE SHOULD BE
WIDESPREAD 80S AND EVEN POTENTIALLY A FEW 90S. A SEA BREEZE WILL
BE LIKELY AT THE COAST AND WOULD KEEP TEMPERATURES DOWN A BIT
THERE.

UPPER RIDGE BEGINS TO SHIFT EAST ON TUESDAY WITH AN UPPER TROUGH
APPROACHING FROM THE WEST. WARM WEATHER CONTINUES BUT A SOUTHERLY
ONSHORE FLOW SHOULD LIMIT TEMPERATURES SOMEWHAT OVER MUCH OF MAINE
AND INCREASING CLOUDS FROM THE WEST MAY LIMIT TEMPERATURES OVER
NEW HAMPSHIRE.

THE UPPER TROUGH AND ASSOCIATED SURFACE FRONT WILL MOVE THROUGH
THE REGION ON WEDNESDAY. THIS WILL BE THE BEST CHANCE OF RAIN AS
SHOWERS AND THUNDERSTORMS WOULD BE EXPECTED AS THE FRONT MOVES
THROUGH. BEYOND THIS THE TWO MAIN FORECAST MODELS DISAGREE A BIT.
GFS PUSHES THE TROUGH AND FRONT THROUGH FULLY WHILE THE ECMWF
LINGERS THE BOUNDARY JUST OFFSHORE FOR THE NEXT SEVERAL DAYS. WITH
THE FRONT LINGERING OFFSHORE... VARIOUS WAVES OF LOW PRESSURE MOVE
ALONG IT AND BRING RAIN CHANCES THURSDAY AND FRIDAY PRIMARILY
TOWARD THE COAST.

&&

.AVIATION /07Z SATURDAY THROUGH WEDNESDAY/...
SHORT TERM...VFR THROUGH TONIGHT. SCATTERED MVFR POSSIBLE SUNDAY IN
SHOWERS.

LONG TERM...VFR CONDITIONS EXPECTED THROUGH TUESDAY. SHOWERS AND
THUNDERSTORMS POSSIBLE ON WEDNESDAY AS A COLD FRONT MOVES THROUGH.

&&

.MARINE...
SHORT TERM...WINDS AND SEAS SHOULD REMAIN BELOW SMALL CRAFT
THROUGH SUNDAY.

LONG TERM...HIGH PRESSURE CROSSES THE WATERS AND WINDS SHIFT TO
SOUTHERLY ON TUESDAY. A COLD FRONT MOVES INTO THE GULF OF MAINE
WEDNESDAY. WINDS WITH ALL OF THESE FEATURES SHOULD REMAIN BELOW
ADVISORY LEVELS.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...NONE.

&&

$$
SCHWIBS/KIMBLE



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.