Low pressure moving through New England produced around 3 inches of rain over southwest Maine. Minor flooding resulted on the Presumpscot River in Westbrook.
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The episode as NWS GYX wrote it up.
Low pressure moving through New England produced around 3 inches of rain over southwest Maine. Minor flooding resulted on the Presumpscot River in Westbrook.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Gray, ME wrote its last area forecast discussion before the first event at Jul 8, 1:33 AM EST, 4 hours 46 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 233 AM EDT WED JUL 8 2009 .SYNOPSIS... AN UPPER LEVEL LOW PRESSURE SYSTEM WILL GRADUALLY WEAKEN AND MOVE OUT TO SEA BY THURSDAY. HIGH PRESSURE WILL DEVELOP OVER NEW ENGLAND THEREAFTER. A STRONG COLD FRONT WILL CROSS THE REGION LATE THIS WEEKEND...WITH UNSETTLED WEATHER LINGERING INTO THE EARLY HALF OF NEXT WEEK. && .NEAR TERM /THROUGH TODAY/... BANDS OF PRECIPITATION CONTINUE TO ROTATE NORTHWARD OVER THE FORECAST AREA TODAY. NUMERICAL MODEL SUITE ALL SHOWING BEST AXIS OF RAINFALL TO SHIFT NORTH AND EASTWARD WITH TIME. MASS FIELDS INDICATING PRECIPITATION WILL CONTINUE IS ASSOCIATION WITH UPPER LEVEL LOW PRESSURE SYSTEM. STEEP LAPSE RATES WILL CONTINUE TO ALLOW FOR A FEW WIDELY SCATTERED TSTMS DURING THE AFTERNOON HOURS...MAINLY AWAY FROM THE COASTLINE. USED A BLEND OF MAV/MET MOS FOR MAX TEMPERATURES TODAY. && .SHORT TERM /TONIGHT/... MOST OF THE PRECIPITATION WILL TAPER OFF BY THIS EVENING. UPPER LOW WILL CONTINUE TO OPEN UP AND LIFT OFF TO THE NORTHEAST. HOWEVER...ENOUGH MOISTURE AND LIFT IN PLACE TO AT LEAST KEEP A CHANCE OF A SHOWER GOING INTO THE NIGHTTIME PERIOD. BELOW NORMAL TEMPERATURES WILL CONTINUE AND HAVE FOLLOWED A BLEND OF MOS GUIDANCE WHICH COOLS US INTO THE 40S AND LOWER 50S BY MORNING. && .LONG TERM /THURSDAY THROUGH TUESDAY/... NUMERICAL MODELS PREDICTABLY DISAGREE ON THE SPEED AT WHICH THIS LATEST UPPER LOW IS WEAKENED AND MOVES OUT TO SEA. CURRENTLY THE STATISTICAL GUIDANCE IS OPTIMISTIC BUT THE SHORT-RANGE ENSEMBLES KEEP SOME CHANCES FOR RAIN THURSDAY MORNING...AND BASED ON RECENT MODEL PERFORMANCE I OPTED TO KEEP A VERY SMALL CHANCE OF SHOWERS BEFORE 18 UTC THURSDAY. OTHERWISE A SHORT-LIVED RIDGE OF HIGH PRESSURE SLIDES ACROSS THE NORTHEASTERN U.S. THURSDAY NIGHT INTO FRIDAY. LOOKING INTO THE WEEKEND...MODEL SOLUTIONS DIVERGE ON THE TIMING OF A STRONG COLD FRONT TO MOVE THROUGH NEW ENGLAND. BEST ESTIMATE WOULD BE LATE SATURDAY NIGHT. ALL MEDIUM-RANGE MODELS AGREE THAT THE LONGWAVE TROUGH WILL RE-ESTABLISH ITSELF ALONG 70-80W FOR SUNDAY THROUGH TUESDAY. THIS WILL LIKELY KEEP CHANCES FOR UNSETTLED WEATHER CONTINUING INTO EARLY NEXT WEEK...WITH BELOW- NORMAL TEMPERATURES CONTINUING. && .AVIATION /06Z WEDNESDAY THROUGH SUNDAY/... SHORT TERM...MAINLY IFR OR LIFR CONDITIONS TODAY INTO TONIGHT. PRECIPITATION AND FOG WILL KEEP VSBYS LOW AT TIMES AS WELL. LONG TERM...VFR THURSDAY INTO SATURDAY UNTIL MVFR CONDITIONS WITH COLD FRONTAL PASSAGE SATURDAY NIGHT...THEN ONSHORE FLOW WILL PROVIDE OCCASIONAL MVFR/IFR CONDITIONS SUNDAY. && .MARINE... SHORT TERM...WINDS/SEAS GRADUALLY LETTING UP AT IOSN3. THEREFORE...WILL BE ABLE TO LOWER SCAS THIS PACKAGE ALTHOUGH THERE WILL BE A FEW GUSTS NEAR 25 KT EARLY THIS MORNING. LONG TERM...NO FLAGS EXPECTED EXCEPT WITH COLD FRONTAL PASSAGE SATURDAY NIGHT. && .HYDROLOGY... MONITORING RIVERS...PARTICULARLY THE PRESUMPSCOT RIVER. LOCALLY HEAVY RAINS IN THE PORTLAND AREA HAS ALLOWED THIS RIVER TO QUICKLY RISE THIS MORNING. MAY VERY WELL REQUIRE A WARNING. OUTSIDE THE RIVERS...THE PRECIPITATION HAS BEEN PROGRESSIVE ENOUGH SO FAR TO KEEP BASIN AVERAGE RAINFALLS IN MOST AREAS AT OR BELOW ONE INCH. NO WARNINGS UP AT THIS TIME. PRECIPITATION WILL BE SHOWERY IN NATURE TODAY. MOST RAINFALL WILL GRADUALLY SHIFT NORTH AND EAST INTO THE FOOTHILLS AND MOUNTAINS. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAY ME 459 AM EDT WED JUL 8 2009 MEZ007>009-012>014-018>028-NHZ001>010-013-014-090900- NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD- SOUTHERN FRANKLIN-SOUTHERN SOMERSET-INTERIOR YORK- INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC-INTERIOR WALDO- COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN-KNOX-COASTAL WALDO- NORTHERN COOS-SOUTHERN COOS-NORTHERN GRAFTON-NORTHERN CARROLL- SOUTHERN GRAFTON-SOUTHERN CARROLL-SULLIVAN-MERRIMACK-BELKNAP- STRAFFORD-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM- 459 AM EDT WED JUL 8 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW HAMPSHIRE...NORTHERN NEW HAMPSHIRE AND SOUTHEASTERN NEW HAMPSHIRE. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ150>154-090900- STONINGTON ME TO PORT CLYDE ME OUT TO 25 NM-PENOBSCOT BAY- PORT CLYDE ME TO CAPE ELIZABETH ME OUT TO 25 NM-CASCO BAY- CAPE ELIZABETH ME TO MERRIMACK RIVER MA OUT TO 25 NM- 459 AM EDT WED JUL 8 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CASCO BAY...PENOBSCOT BAY...THE COASTAL WATERS FROM CAPE ELIZABETH ME TO MERRIMACK RIVER MA...THE COASTAL WATERS FROM PORT CLYDE ME TO CAPE ELIZABETH ME AND THE COASTAL WATERS FROM STONINGTON ME TO PORT CLYDE ME. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Heavy rain caused minor flooding on the Presumpscot River at Westbrook, (flood stage 15.0 ft), which crested at 15.7 ft.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maine in 2009Every state in 2009This day in weather historyWarnings in Maine, July 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 190169.