National Weather Service National Headquarters

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KGYX 140126
AFDGYX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
926 PM EDT MON MAY 13 2013

.SYNOPSIS...
-- Changed Discussion --
HIGH PRESSURE WILL BUILD IN FROM THE WEST OVERNIGHT THROUGH TUESDAY.
THE HIGH WILL SHIFT OFFSHORE ON WEDNESDAY AS A WARM FRONT
APPROACHES FROM THE WEST. THE WARM FRONT WILL PUSH INTO THE REGION
WEDNESDAY NIGHT AND WILL BE QUICKLY FOLLOWED BY A COLD FRONT. THE
FRONT WILL MOVE OFF THE EAST COAST THURSDAY AND WILL LINGER
OFFSHORE THROUGH FRIDAY AS LOW PRESSURE SLOWLY DRIFTS SOUTHEAST
OUT OF QUEBEC. HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST
FRIDAY NIGHT THROUGH SATURDAY. A WARM FRONT WILL APPROACH FROM THE
SOUTHWEST ON SUNDAY.
-- End Changed Discussion --

&&

.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...

-- Changed Discussion --
925 PM...ONLY MINOR ADJUSTMENTS TO CURRENT 1ST PERIOD GRIDS THIS
ESTF UPDATE MAINLY FOR HOURLY TEMPERATURES AND DEWPOINTS. `

PREV DISC...
610 PM...A FEW CLOUDS WERE SLIDING ACROSS THE AREA IN ASSOCIATION
WITH THE UPPER TROUGH. THE NWS 88D DOPPLER RADAR WAS SHOWING SOME
LIGHT RETURN ACROSS THE HIGHER TERRAIN...WHERE A FEW SPRINKLES OR
FLURRIES ARE POSSIBLE NEXT FEW HOURS. ONLY MINOR ADJUSTMENTS FOR
THIS ESTF UPDATE BASED LARGELY ON THE MESONET.

PREV DISC...
UPR LOW PRES CONTINUES TO SPIN ACROSS SERN CANADA THRU TONIGHT.
PINWHEELING AROUND THIS LOW WILL BE A NUMBER OF S/WV TROFS...THAT
WILL CROSS THE AREA LATE THIS AFTERNOON AND EARLY EVENING. IN
ADDITION TO KEEPING THE CLOUD COVER AROUND...THESE TROFS COULD
BRING A FEW SPRINKLES OR SHWRS TO THE THE NRN ZONES.

LOSS OF DIURNAL HEATING AND PASSAGE OF S/WV WILL BRING A GRADUAL
DECREASE IN CLOUDS TONIGHT...ALONG WITH WINDS BECOMING LIGHT AND
VARIABLE. ANOMALOUSLY COLD AIR MASS IN PLACE...NEARING 2 SD BLO
NORMAL...WILL SUPPORT LOW TEMPS REACHING THE UPR 30S DOWN TO THE
COAST. EXPECT SOME FROST...ESPECIALLY IN SHELTERED LOCATIONS...SO
HAVE ISSUED AN ADVISORY FOR COASTAL ZONES.
-- End Changed Discussion --

&&

.SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/...
SFC RIDGING CONTINUES ON TUE...WITH FAIR WX AFTERNOON CLOUDS
POPPING UP ACROSS THE INTERIOR. HIGH TEMPS WILL BE A COUPLE
DEGREES WARMER THAN TODAY...WITH STRONGEST CAA COMING TO AN END.
CLEARING SKIES AND LIGHT WINDS WILL MAKE TUE NIGHT ANOTHER IDEAL
NIGHT FOR COLD TEMPS. FROST WILL ONCE AGAIN BE A POSSIBILITY DOWN
TO THE COAST.

&&

.LONG TERM /WEDNESDAY THROUGH MONDAY/...
A RELATIVELY DRY ATMOSPHERE WILL BE IN PLACE WEDNESDAY WITH
NEUTRAL FLOW ALOFT. HOWEVER...IN THE LOWER LEVELS...STRONG WARM
AIR ADVECTION TO TAKE PLACE AHEAD OF A WARM FRONT. THIS SYSTEM
WILL CROSS THE REGION WEDNESDAY NIGHT...WITH MOST AREAS POPS
JUMPING INTO THE LIKELY CATEGORY. THERE MAY BE A PASSING RUMBLE OF
THUNDER AS WELL...HOWEVER THE CHANCES ARE LOW ENOUGH TO OMIT FROM
THE GRIDS AT THIS TIME.

COOLER...DRIER AIR FOLLOWS ON THURSDAY ON THE HEELS OF A COLD
FRONT. HOWEVER...CYCLONIC FLOW...IN COMBINATION WITH A COLD POOL
ALOFT WILL ALLOW FOR A CHANCE OF A SHOWER DURING THE DAY. THE
PASSAGE OF AN UPPER LEVEL TROUGH WILL ALLOW FOR ADNL CHANCES OF
RAIN THURSDAY NIGHT.

HIGH PRESSURE SLOWLY BUILDS TOWARDS THE REGION FROM THE WEST
FRIDAY INTO SATURDAY. THE MOUNTAINS WILL HAVE THE SLGT CHC FOR A
SHOWER THOSE DAYS...WHERE GREATEST LOW LEVEL LAPSE RATES WILL BE
IN PLACE.

ON SUNDAY...ANOTHER WARM FRONT WILL BE ENTERING THE REGION.
THEREAFTER...THE PATTERN WILL REMAIN VERY UNSETTLED IN A DEEP
MERIDIONAL FLOW OFF THE ATLC OCEAN.

&&

.AVIATION /02Z TUESDAY THROUGH SATURDAY/...
SHORT TERM...VFR CONDS WILL PREVAIL THRU THE PERIOD...AS ANY SHWRS
IN THE MTNS WILL KEEP VFR CIGS/VSBYS. GUSTY WLY FLOW WILL RELAX
LATE THIS AFTERNOON. NWLY FLOW COULD APPROACH 12 KT TOMORROW
AFTERNOON AS WELL.

LONG TERM...VFR WEDNESDAY. AREAS OF MVFR/IFR CEILINGS WEDNESDAY
NIGHT. VFR THURSDAY THROUGH SATURDAY.

&&

.MARINE...
SHORT TERM...SCA REMAINS IN EFFECT ON THE OUTER WATERS FOR HIGH
SEAS. WINDS WILL DIMINISH TONIGHT...ALLOWING SEAS TO GRADUALLY
SUBSIDE INTO TUE.

LONG TERM...SCA`S WILL LIKELY BE NEEDED WEDNESDAY.

&&

.FIRE WEATHER...
A COOLER AND DRIER AIR MASS WILL LAST THROUGH TUESDAY. RH VALUES
EAST OF THE MOUNTAINS WILL DROP TO BETWEEN 20 AND 30 PERCENT ON
TUESDAY. HOWEVER...THE POTENTIAL FOR RAPID FIRE SPREAD IS LOW
GIVEN RECENT WETTING RAINS...RAPID GREEN-UP IN PROGRESS...AND
LIGHTER WINDS TUESDAY.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...FROST ADVISORY FROM 2 AM TO 8 AM EDT TUESDAY FOR MEZ023>028.
NH...FROST ADVISORY FROM 2 AM TO 8 AM EDT TUESDAY FOR NHZ014.
MARINE...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS UNTIL 5 AM EDT TUESDAY
     FOR ANZ150-152-154.

&&

$$
ES