Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 162243 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 643 PM EDT WED APR 16 2014 .SYNOPSIS... HIGH PRESSURE WILL BUILD OVER THE AREA TONIGHT BRINGING CLEAR SKIES AND NEAR RECORD COLD TEMPERATURES. THE HIGH WILL SLIDE OFFSHORE AND INTO THE MARITIMES THURSDAY AND THURSDAY NIGHT. WEAK FRONTAL BOUNDARIES WILL CROSS THE AREA SATURDAY AND AGAIN LATE MONDAY AND TUESDAY. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/... WILL UPDATE TO INPUT THE LATEST OBSERVED DATA RESULTING IN NO MORE THAN A FEW MINOR TWEAKS TO THE PREVIOUS FCST. HIGH PRESSURE BUILDS IN TNGT WITH LGT WINDS...EXCEPT A NORTHERLY BREEZE WILL CONT THRU MUCH OF THE NGT ALONG THE COAST...IN PART DUE TO A LAND BREEZE CIRCULATION BETWEEN THE COLDER LAND AND THE WARMER OCEAN. SKIES WILL BE CLR OVERNIGHT ALLOWING TEMPS TO DROP QUICKLY. THIS WILL SET THE STAGE FOR RECORD OR NEAR RECORD LOW TEMPERATURES BY DAWN ON THURSDAY. THE RECORD LOWS ARE 18F SET IN 1908 AT CONCORD AND 24F SET IN 2003 AT PORTLAND FOR APRIL 17TH... AND BOTH ARE IN JEOPARDY OF BEING BROKEN. && .SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/... AFTER A CHILLY START...WE`LL ONLY REBOUND TO THE 40S UNDER SUNNY SKIES. A FEW 50 DEGREE READINGS ARE POSSIBLE IN THE CONNECTICUT VALLEY. WITH THE HIGH SLIDING OFFSHORE WE`LL SEE THE ICEBOX DOOR OPEN...WITH A DEVELOPING ONSHORE BREEZE OFF THE 40 DEGREE OCEAN FURTHER LIMITING HIGH TEMPERATURES. A BIT WARMER THURSDAY NIGHT...WITH SOME MARINE STRATUS POSSIBLE LATE ALONG THE COAST FROM PORTLAND AND POINTS SOUTH IN THE PERSISTENT ONSHORE FLOW. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... NO SIGNIFICANT WEATHER EVENTS EXPECTED DURING THE LONG TERM PERIOD. AS HIGH PRESSURE MOVES OFFSHORE FRIDAY...A COOL ONSHORE FLOW WILL DEVELOP ALONG THE COAST DURING THE DAY. THIS WILL KEEP TEMPS ALONG THE COAST RATHER COOL. AT THIS TIME...AM NOT ADDING AND DRIZZLE/FOG ALTHOUGH THESE REMAIN A POSSIBILITY. LOW PRESSURE MOVING NORTH OF THE REGION FRIDAY NIGHT AND SATURDAY WILL PUSH A WEAK FRONT THROUGH THE AREA. THIS WILL BRING JUST A CHANCE OF SOME MIXED PRECIP IN MTNS WITH A CHC OF SHOWERS ELSEWHERE. NORTHWEST FLOW WILL DEVELOP ACROSS THE REGION LATE SATURDAY AND SUNDAY AS HIGH PRES BUILDS INTO REGION. ANOTHER FRONTAL BOUNDARY WILL CROSS THE REGION MONDAY NIGHT AND TUESDAY WITH A SLIGHT CHANCE OF SHOWERS. && .AVIATION /00Z THURSDAY THROUGH MONDAY/... SHORT TERM /THROUGH THURSDAY NIGHT/...VFR THRU THURSDAY AS HIGH PRESSURE DOMINATES. DEVELOPING ONSHORE FLOW THURSDAY WILL CONT THURSDAY NGT AND THIS MAY GRADUALLY BRING IN ATLANTIC MOISTURE IN THE FORM OF LOW CLOUDS...AT LEAST FOR COASTAL TAF SITES...AND PERHAPS INLAND TO CON AND AUG. LONG TERM...MAINLY VFR CONDITIONS EXPECTED. THERE`S A CHANCE OF SOME FOG AND DRIZZLE ALONG THE COAST FRIDAY AS AN ONSHORE FLOW DEVELOPS. && .MARINE... SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/...WILL UPDATE TO DROP THE SCA FOR CASCO AND PENOBSCOT BAYS AS WINDS AND SEAS HAVE DROPPED BELOW CRITERIA. WINDS AND SEAS STILL AT MINIMAL SCA LEVELS OVER THE OPEN WATERS SO WILL KEEP THE SCA GOING THERE. HOWEVER... THAT MAY BE ABLE TO BE DROPPED LATER TNGT AS HIGH PRESSURE BUILDS IN. THE COLD NW FLOW, THOUGH, MAY KEEP THE GUSTINESS GOING FOR SEVERAL MORE HOURS. SMALL CRAFT SEAS SHOULD DROP BELOW SCA THRESHOLD BY LATE TONIGHT DUE TO OFFSHORE WIND FLOW THAT WILL BE DROPPING OFF. QUIET THURSDAY AND THURSDAY NIGHT AS HIGH PRESSURE CRESTS ACROSS THE WATERS. LONG TERM...SEAS COULD REACH SCA CRITERIA MONDAY AHEAD OF FRONTAL SYSTEM...OTHERWISE WINDS AND SEAS SHOULD BE MAINLY BELOW SCA CRITERIA. && .HYDROLOGY... FLOOD WARNINGS REMAIN IN EFFECT FOR SEVERAL RIVERS ACROSS NORTHERN AND CENTRAL PARTS OF THE FORECAST AREA. SEE THE LATEST FLOOD PRODUCTS... PWMFLSGYX AND PWMFLWGYX...FOR MORE DETAILS. THESE PRODUCTS ARE ALSO AVAILABLE ON OUR WEB SITE AT WWW.WEATHER/GOV/GYX. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT THURSDAY FOR ANZ150-152- 154. && $$

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