Area Forecast Discussion
Issued by NWS Caribou, ME

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FXUS61 KCAR 012330
AFDCAR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CARIBOU ME
630 PM EST SUN MAR 1 2015

.SYNOPSIS...
LOW PRESSURE WILL APPROACH THE REGION FROM OHIO VALLEY THIS
EVENING AND MOVING THROUGH THE REGION LATER TONIGHT INTO MONDAY.
THIS SYSTEM WILL BRING SOME SNOW TO THE FORECAST AREA. HIGH
PRESSURE WILL BUILD TOWARD THE AREA MONDAY NIGHT AND TUESDAY FROM
THE WEST. ANOTHER LOW WILL CROSS THE REGION WEDNESDAY.

&&

.NEAR TERM /THROUGH MONDAY/...
630 PM UPDATE...LOW PRES OFF THE DELMARVA COAST THIS EVENING WILL
JOIN FORCES WITH A SYSTEM MOVING IN FROM THE WEST. THE SFC LOW
WILL PASS JUST SOUTH OF THE GULF OF MAINE OVERNIGHT AND INTENSIFY
MON AS IT LIFTS NE ACROSS THE EASTERN MARITIMES. CLOUDS CONTINUE
TO STREAM ACROSS THE CWA EARLY THIS EVENING AND WILL LOWER AND
THICKEN UP. SNOW WILL BREAK OUT ACROSS DOWN EAST AREAS LATER THIS
EVENING AND SPREAD NORTH. THE HEAVIEST SNOWFALL STILL LOOKS TO BE
CONFINED TO AREAS ALONG AND NEAR THE COAST WITH AMOUNTS TO DROP
OFF TO THE NORTH. LITTLE/NO SNOW EXPECTED ACROSS NW MAINE. THE
MAIN CHANGE WITH THIS UPDATE WERE TO SLOW THE TIMING OF THE SNOW
A BIT BASED ON THE LATEST OBSERVATIONS...RADAR TRENDS...AND NEAR
TERM MODELS. THE SMOWFALL AMOUNTS WERE ALSO TWEAKED DOWN A BIT
ACROSS FAR NORTHERN AND NORTHWEST MAINE.

PREVIOUS DISCUSSION...
THINGS TO FOCUS ON THIS TERM WILL BE SNOWFALL AMOUNTS AND SNOW
SQUALL POTENTIAL ON MONDAY.

18Z SURFACE ANALYSIS SHOWED HIGH PRES S OF THE REGION RIDGING
ACROSS THE STATE OF MAINE. MID AND HIGH CLOUDS MOVING NE PER THE
LATEST SATELLITE IMAGERY WILL CAP ANY FURTHER PROGRESSION OF
TEMPERATURES THIS AFTERNOON. READINGS ACROSS NORTHERN AND WESTERN
AREAS HIT THE MID/UPPER 20S WHILE CENTRAL AND DOWNEAST CLOSED IN
AROUND 30. TEMPERATURES WILL FALL BACK AFTER SUNSET BUT W/THE
CLOUDS MOVING IN, ANY FURTHER DROP WILL BE SLOW OR EVEN READINGS
LEVELING OFF ESPECIALLY DOWNEAST AND THE COAST. NORTHERN AREAS
COULD SEE TEMPERATURES FALL OFF QUICKER AS INITIAL CLOUD SHIELD IS
THIN PER THE OBS. SNOW IS FORECAST TO BREAK OUT ACROSS THE
SOUTHERN AND DOWNEAST AREAS THIS EVENING. THE LATEST RUNS OF THE
RAP AND HRRR 3KM DOING WELL PER THE RADAR TRENDS AND METARS. THIS
SET OF GUIDANCE SHOWS SNOW SETTING UP LATER THAN PREVIOUSLY
EXPECTED. THEREFORE, PULLED BACK ON THE TIMING BY A FEW HRS. LOW
PRES MOVING E FROM THE OHIO VALLEY IS SHOWN BY THE MODEL GUIDANCE
TO RE-DEVELOP OFF THE MAINE COAST LATER TONIGHT W/AN INVERTED TROF
SETTING UP FOR A TIME ACROSS EASTERN SECTIONS. SOME FORCING IS
THERE AND W/TEH LLVL CONVERGENCE, THERE COULD BE A BRIEF PERIOD OF
MODERATE SNOW WHERE RATIOS OF 15-20:1 COULD BE REALIZED W/2-4 INCHES
OF SNOW FROM 06-12Z. THE HIGHEST SNOWFALL WILL BE ACROSS THE COAST
AND GIVEN THE 3-4 INCH AMOUNTS SHOWN, DECIDED TO ISSUE A WINTER
WEATHER ADVISORY FOR SNOW. THIS WAS COORDINATED W/GYX. FURTHER N
AND W, SNOWFALL AMOUNTS WILL DROP OFF AS DYNAMICS WILL BE WEAKER
W/A GENERAL 1-3 INCHES AT BEST.

FOR MONDAY, SNOWFALL WILL COME TO AN END QUICKLY ACROSS THE W AND
DOWNEAST REGION WHILE EASTERN AREAS INCLUDING EASTERN SECTION OF
AROOSTOOK COUNTY WILL HANG ON TO A PERIOD OF SNOW THROUGH 10 AM
OR SO. THINGS WILL TRANSITION TO A MORE SHOWERY NATURE FOR THE
SNOW W/A GOOD CHANCE FOR SOME SNOW SQUALLS. THE NAM AND GFS
SOUNDINGS POINT TO STEEPENING LAPSE RATES(6/5-7.0C/KM) AT
850-700MBS AND FORECAST CAPE OF 70+ JOULES. THIS WILL BE IN
ASSOCIATION W/AN ARCTIC FRONT THAT IS FORECAST TO SLIDE ACROSS THE
REGION MONDAY AFTERNOON. THE BTV SNOW SQUALL PARAMETER SHOWED 2
AREAS OF SQUALL POTENTIAL W/ONE ACROSS NORTHERN AND WESTERN AREAS
AND THE SECOND AREA ACROSS EASTERN MAINE. TEMPERATURES WILL DROP
OFF SHARPLY BEHIND THIS BOUNDARY AFTER 19Z(2 PM). A QUICK INCH OF
SNOW CAN BE EXPECTED W/THE SQUALLS ALONG W/WIND GUSTS UP TO 30
MPH. THIS SITUATION IS SIMILAR TO THE SQUALL EVENT THAT OCCURRED A
WEEK AGO(2/23)WHERE MOIST OFF THE OPEN ST. LAWRENCE COMBINED W/THE
FRONT AIDING IN SOME HEFTY SNOW SQUALLS/SNOW SHOWERS.

&&

.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY/...
THE MAIN FORECAST CONCERN FOR THE SHORT TERM IS A QUICK MOVING
SHORTWAVE WHICH WILL AFFECT MOST OF NEW ENGLAND TUESDAY NIGHT INTO
WEDNESDAY. THE COMBINATION OF DPVA AND WAA WILL PROVIDE SUFFICIENT
LIFT TO PRODUCE LIGHT TO MODERATE SNOW ACROSS OUR CWA DURING THIS
TIME FRAME...WITH CONDITIONS EXPECTED TO DRY OUT QUICKLY WEDNESDAY
AFTERNOON. HAVE FOLLOWED CLOSELY TO CONSALL QPF WHICH RESULTS IN
A GENERAL 3 TO 5 INCHES OF SNOWFALL. THE HIGHEST AMOUNTS WILL
OCCUR DOWNEAST...BUT WITH TEMPS IN THE LOWER 40S WEDNESDAY
AFTERNOON...MUCH OF THE SNOW WILL COMPACT OR MELT.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
THE UPPER LEVEL FLOW WILL BECOME ZONAL AND PROGRESSIVE DURING THE
EXTENDED FORECAST PERIOD...BRINGING A SERIES OF VERY WEAK
SHORTWAVES ACROSS THE NORTHEAST. THIS WILL RESULT IN SEASONABLY
COLD CONDITIONS WITH OCCASIONAL SNOW SHOWERS.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
NEAR TERM: VFR DROPPING TO MVFR LATER THIS EVENING AND THEN IFR
OVERNIGHT FOR ALL TERMINALS. CONDITIONS ARE FORECAST TO IMPROVE TO
VFR FOR KBGR AND KBHB MIDDAY MONDAY W/THE NORTHERN TERMINALS
GOING FROM IFR TO MVFR.

SHORT TERM: MVFR TO IFR CONDITIONS SHOULD PREVAIL ACROSS THE CWA
TUESDAY NIGHT INTO WEDNESDAY MORNING IN ASSOCIATION WITH THE
AFOREMENTIONED SNOWFALL. CONDITIONS WILL IMPROVE WEDNESDAY
AFTERNOON.

&&

.MARINE...
NEAR TERM: PER COORDINATION W/GYX, DECIDED TO GO W/A GALE WARNING
FOR MONDAY AFTERNOON INTO THE EVENING DUE TO THE ARCTIC FRONT
MOVING ACROSS THE WATERS. NW WINDS W/CAA WILL ALLOW FOR WINDS TO
HIT 25 TO 30 W/GUSTS UP TO 35 KTS. BUFKIT PROFILES SHOW GUST
POTENTIAL TO 40 KTS OVER THE OUTER WATERS. MIDNIGHT CREW HAD THIS
HANDLED WELL AND STAYED CLOSE TO IT.

SHORT TERM: A SMALL CRAFT ADVISORY WILL LIKELY BE NEED FOR OUR
COASTAL MARINE ZONES TUESDAY NIGHT INTO WEDNESDAY AS STORM SYSTEMS
CROSSES THE AREA...CREATING BREEZY SOUTHWEST WINDS AND HIGH WAVES.

&&

.CLIMATE...FEBRUARY ENDED AS THE ALL-TIME COLDEST MONTH ON RECORD
AT BANGOR AND THE COLDEST FEBRUARY ON RECORD AT CARIBOU. MORE
INFORMATION ON THE RECORD COLD MONTH IS AVAILABLE ON THE NEWS
HEADLINES ON THE TOP OF OUR WEB PAGE AT: WEATHER.GOV/CAR

&&

.CAR WATCHES/WARNINGS/ADVISORIES...
ME...WINTER WEATHER ADVISORY FROM MIDNIGHT TONIGHT TO 10 AM EST
     MONDAY FOR MEZ029-030.
MARINE...GALE WARNING FROM 3 PM MONDAY TO 4 AM EST TUESDAY FOR
     ANZ050>052.

&&

$$

NEAR TERM...CB/HEWITT
SHORT TERM...BERDES
LONG TERM...BERDES
AVIATION...CB/HEWITT/BERDES
MARINE...CB/HEWITT/BERDES
CLIMATE...CB



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