Slow moving thunderstorms continued to form over the same area of Somerset County near Bingham resulting in 3 to 5 inches of rainfall in 3 hours. Numerous washouts were reported on Mahoney Hill Road.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GYX wrote it up.
Slow moving thunderstorms continued to form over the same area of Somerset County near Bingham resulting in 3 to 5 inches of rainfall in 3 hours. Numerous washouts were reported on Mahoney Hill Road.
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 6, 5:16 PM EST, 2 hours 59 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE GRAY ME 616 PM EDT MON JUL 6 2009 .SYNOPSIS... SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO THE EVENING AS A WEAK FRONTAL REGION WILL CONTINUE TO PASS THROUGH THE REGION. A WARM FRONT WILL APPROACH THE REGION ON TUESDAY BRINGING WITH IT THE POSSIBILITY OF RAIN AND OVERCAST CONDITIONS THROUGH WEDNESDAY NIGHT. HIGH PRESSURE WILL DROP SOUTH FROM QUEBEC THURSDAY...THEN ACROSS THE REGION ON FRIDAY. A COLD FRONT WILL APPROACH NEW ENGLAND FOR NEXT WEEKEND. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... ---UPDATED--- ISOLATED SHOWERS AND THUNDERSTORMS HAVE STARTED TO POP UP OVER THE MOUNTAINS OF WESTERN MAINE AND NH THIS AFTERNOON. A SEMI-ORGANIZED LINE OF CONVECTION WAS ALSO MOVING THOURGH THE CHAMPLAIN VALLEY. WHILE THE ISOLATED STORMS WILL LIKELY DIMINISH AS DIURNAL HEATING IS REMOVED...THE LINE MOVING INTO VT WILL LIKELY HOLD TOGETHER LONG ENOUGH TO MAKE IT INTO THE CWA. CONVECTION SHOULD CONTINUE TO DIMINISH IN INTENSITY AS THE EVENING PROGRESSES. HAVE UPDATED FORECAST PACKAGE TO ACCOUNT FOR SLIGHTLY COOLER TEMPERATURES. KEPT POPS HIGH OVER THE MOUNTAINS WITH ONLY CHANCE POPS OVER THE COASTAL PLAIN. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH 6 PM TUESDAY/... MOST AREAS, ESPECIALLY ALONG THE COAST WILL SEE OVERCAST CONDITIONS AS A LOW STRATUS DECK IS IN PLACE OVER MOST OF THE DAY TUESDAY. THE ONLY EXCEPTION BEING POSSIBLE AREAS IN WESTERN NEW HAMPSHIRE WHO COULD SEE SOME BREAKS IF THAT STRATUS DECK DOESNT MOVE THAT FAR INLAND. THE GFS SEEMS TO BE SUGGESTING FAR TO WARM OF TEMPERATURES FOR SUCH OVERCAST CONDITIONS SO A BLEND OF THE NAM/GFS WAS USED FOR HIGH TEMPERATURES. EXPECT HIGHS IN THE LOWER 60S WITH THE ONLY EXCEPTION BEING, AGAIN, THOSE FAR WESTERN AREAS WHO MAY SEE SOME SUN. PRECIPITATION WILL DEVELOP AROUND MIDDAY AND BECOME HEAVY INTO THE EVENING HOURS ESPECIALLY OVER SOUTHWESTERN MAINE AND SOUTHERN NEW HAMPSHIRE. THE CAUSE OF THIS PRECIPITATION IS DUE TO OVERRUNNING BETWEEN THE SURFACE AND 850MB. && .LONG TERM /TUESDAY NIGHT THROUGH MONDAY/... THE MAIN FOCUS FOR TUESDAY NIGHT IS THE POTENTIAL FOR RAIN. AN APPROACHING FRONTAL BOUNDARY COMBINES WITH UPPER LEVEL DIVERGENCE AHEAD OF THE 500 MB LOW TO PRODUCE AN AREA OF RAINFALL. PRECIPITABLE WATER VALUES ARE ONLY AROUND AN INCH...AND NIGHTTIME TIMING IS NOT FAVORABLE FOR CONVECTION. THE CONCERN...HOWEVER...IS THAT THE BOUNDARY WILL STALL...POTENTIALLY FOCUSING PRECIPITATION ACROSS ONE REGION. IN ADDITION TO THE NAM/GFS...THE GEM/UKMET ARE ALSO HINTING AT THIS...THOUGH THEY HAVE THE QPF BULLSEYE A TAD SOUTH OF THE NAM/GFS SOLUTIONS. DO NOT HAVE THE CONFIDENCE TO ISSUE A WATCH AT THIS TIME...BUT DO FEEL THERE IS A CHANCE OF 1 TO 2 INCHES OF RAIN SOMEWHERE IN THE CWA TUESDAY NIGHT. WOULD ALSO LIKE TO SEE ANOTHER MODEL RUN OR TWO...TO TRY TO BETTER PIN DOWN IF AND WHEN THE BOUNDARY WILL STALL. NAM BUFKIT SOUNDING SHOWS MOIST ADIABATIC SOUNDING ABOVE THE LOW-LEVEL INVERSION...WILL JUST CARRY A MENTION OF ISOLATED TSTMS WITH THIS FOR NOW. OTHERWISE...EXPECT ONSHORE FLOW AHEAD OF THE FRONT TO CAUSE AREAS OF FOG. ACCEPT NAM/GFS MOS BLEND FOR TEMPS...WITH LITTLE RADIATIONAL COOLING EXPECTED. THE CLOSED 500 MB LOW GRADUALLY OPENS AS IT DRIFTS EAST WEDNESDAY INTO WEDNESDAY NIGHT...ALLOWING THE BOUNDARY TO MOVE EAST...AND LIKELY WEAKEN. CONTINUE TO USE A 4-MODEL BLEND FOR POPS...WITH THE GEM/UKMET CONTINUING TO BE SLOWER AND SOUTH WITH THE QPF THAN THE GFS/NAM. ONSHORE FLOW CONTINUES...AND AGAIN TEMPERATURES NOT EXPECTED TO RISE MUCH AT ALL...WITH STRATUS EXPECTED TO LINGER ACROSS MOST OF THE CWA. HIGH PRESSURE GRADUALLY DROPS SOUTH FROM QUEBEC ON THURSDAY...THOUGH LINGERING BOUNDARY MAY CAUSE SHOWERS TO LINGER IN SOUTHERN SECTIONS. AFTER THURSDAY...HAVE A GOOD MODEL CONSENSUS OF DRY WEATHER THURSDAY NIGHT THROUGH FRIDAY NIGHT...WITH 12Z RUNS OF THE GFS/GEM IN AGREEMENT WITH THE 00Z EUROPEAN. 850 MB HEIGHTS COOL...SHOULD RETURN TO DIURNAL VARIATIONS IN TEMPS...WITH BELOW NORMAL LOWS EXPECTED. LOOKING AHEAD TO THE WEEKEND...A COLD FRONT CROSSES THE REGION SOMETIME NEXT WEEKEND...WITH THE 00Z EUROPEAN ABOUT 12 HRS SLOWER THAN THE 12Z GFS...WHICH ACTUALLY ISN/T TOO BAD AGREEMENT. USE A BLEND...WHICH STRETCHES OUT THE PERIOD CHANCE POPS ARE CARRIED...THOUGH AS MODELS FOCUS IN...SHOWERS WILL BE LIKELY...JUST FOR A SHORT PERIOD OF TIME AS THE FRONT ACTUALLY PASSES. FOR WHAT ITS WORTH...GFS SHOWS AN UNUSUALLY STRONG FRONT FOR THIS TIME OF YEAR...THOUGH ITS STILL TOO FAR OFF TO GET CONCERNED ABOUT. && .AVIATION /22Z MONDAY THROUGH SATURDAY/... IN THE NEAR TERM /TONIGHT/...VFR CONDITIONS SHOULD PREVAIL THROUGH THE EVENING HOURS. SCATTERED CONVECTION IS EXPECTED...BUT FOR NOW WILL NOT INCLUDE IN THE FORECAST DUE TO LACK OF CONFIDENCE. AFTER THIS...THE FORECAST BECOMES MORE NEBULOUS. STRATUS SHOULD DEVELOP ON THE LIGHT EAST TO SOUTHEAST FLOW UNDER THE MARINE INVERSION (THOUGH THERE IS NOT IN THE GULF OF MAINE RIGHT NOW). BROUGHT KPWM AND KAUG DOWN TO LIFR IN THE STRATUS...BUT NOT AS CONFIDENCE ELSEWHERE. IN THE SHORT TERM /TUESDAY/...STRATUS MAY BE MORE OF A PROBLEM FOR EASTERN AREAS (KPWM...KAUG AND KPSM) WITH THE ONSHORE FLOW TRAPPING MOISTURE UNDER THE INVERSION. SHOWERS AND THUNDERSTORMS WILL DEVELOP...MAINLY ACROSS WESTERN ZONES. THIS WERE NOT INCLUDED AS THEY SHOULD OCCUR MOSTLY AFTER 1800 UTC. LOOKING AHEAD...ONSHORE FLOW SHOULD PRODUCE LIFR OR LOWER CIGS AND/OR VSBY FROM FOG FOR TUESDAY NIGHT...LINGERING INTO WEDNESDAY AND WEDNESDAY NIGHT ALONG THE COAST. BEST CONDITIONS WILL AGAIN BE AT LEB...WHERE VARIABLE CONDITIONS ARE EXPECTED THROUGH THAT TIME PERIOD. BEYOND...CONDITIONS IMPROVE THURSDAY...WITH GOOD CONFIDENCE IN PREDOMINANTLY VFR CONDITIONS THURSDAY AND FRIDAY. && .MARINE... IN THE NEAR TERM /TONIGHT/...WINDS AND SEAS SHOULD REMAIN BELOW SMALL CRAFT LEVELS AS THE GRADIENT REMAINS WEAK. THERE COULD BE A FEW GUSTS THIS EVENING TO NEAR 20 KNOTS AT THE C MAN STATIONS IN RESPONSE TO LOCAL SEA BREEZES. IN THE SHORT TERM /TUESDAY/...WINDS WILL INCREASE AS THE GRADIENT TIGHTENS AHEAD OF A WARM FRONT. AT THIS POINT...THE EAST TO SOUTHEAST WINDS SHOULD REMAIN BELOW 20 KNOTS. THE FETCH WILL INCREASE IN THE FLOW AS WELL...BUT SEAS SHOULD REMAIN BELOW 5 FEET INTO TUESDAY EVENING. IN THE LONG TERM...EXPECT E-NE FLOW AHEAD OF THE FRONTAL BOUNDARY TUESDAY NIGHT INTO WEDNESDAY...WITH WINDS LIKELY JUST BELOW SCA CRITERIA. MAY NEED TO WATCH SEAS...WHICH MAY PUSH 5 FT. DID HEDGE ABOVE MODEL GUIDANCE...AND OFTEN THE NE FLOW IS A BIT STRONGER THAN MODEL FORECASTS. HIGH PRESSURE BUILDS IN THURSDAY AND FRIDAY...WITH NO HEADLINES EXPECTED. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && NEAR TERM...POHL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAY ME 602 PM EDT MON JUL 6 2009 MEZ007>009-012>014-NHZ001>009-072215- NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD- SOUTHERN FRANKLIN-SOUTHERN SOMERSET-NORTHERN COOS-SOUTHERN COOS- NORTHERN GRAFTON-NORTHERN CARROLL-SOUTHERN GRAFTON-SOUTHERN CARROLL- SULLIVAN-MERRIMACK-BELKNAP- 602 PM EDT MON JUL 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW HAMPSHIRE AND NORTHERN NEW HAMPSHIRE. .DAY ONE...TONIGHT A FEW THUNDERSTORMS MAY PRODUCE GUSTY WINDS...SMALL HAIL AND HEAVY RAIN THIS EVENING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A FEW THUNDERSTORMS MAY PRODUCE GUSTY WINDS AND HAIL TUESDAY AFTERNOON AND EVENING. LOCALLY HEAVY RAINFALL IS POSSIBLE TUESDAY NIGHT INTO WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. MEZ018>028-NHZ010-013-014-072215- INTERIOR YORK-INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC- INTERIOR WALDO-COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN- KNOX-COASTAL WALDO-STRAFFORD-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM- 602 PM EDT MON JUL 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW HAMPSHIRE AND SOUTHEASTERN NEW HAMPSHIRE. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A FEW THUNDERSTORMS MAY PRODUCE GUSTY WINDS AND HAIL TUESDAY AFTERNOON AND EVENING. LOCALLY HEAVY RAINFALL IS POSSIBLE TUESDAY NIGHT INTO WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ150>154-072215- 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- 602 PM EDT MON JUL 6 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...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. DAG/AP
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAY ME 529 PM EDT MON JUL 6 2009 MEZ008-009-062215- CENTRAL SOMERSET-NORTHERN FRANKLIN- 529 PM EDT MON JUL 6 2009 ...STRONG THUNDERSTORMS WILL IMPACT SOMERSET COUNTY AND FRANKLIN COUNTY THROUGH 615 PM EDT... AT 529 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 3 MILES EAST OF STRATTON...OR ABOUT 7 MILES SOUTHEAST OF EUSTIS...MOVING NORTHEAST AT 10 MPH. THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND STRATTON...EUSTIS AND FLAGSTAFF LAKE THROUGH 615 PM EDT. HAIL UP TO ONE HALF INCH IN DIAMETER...HEAVY DOWNPOURS...EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 35 TO 45 MPH CAN BE EXPECTED. DAG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAY ME 614 PM EDT MON JUL 6 2009 MEZ009-014-062300- CENTRAL SOMERSET-SOUTHERN SOMERSET- 614 PM EDT MON JUL 6 2009 ...STRONG THUNDERSTORMS WILL IMPACT SOMERSET COUNTY THROUGH 700 PM EDT... AT 613 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 4 MILES SOUTHWEST OF BRIGHTON...MOVING NORTH AT 5 MPH. THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND SOLON...BINGHAM...MOSCOW...BRIGHTON AND MAYFIELD THROUGH 700 PM EDT. HAIL UP TO ONE HALF INCH IN DIAMETER...HEAVY DOWNPOURS...LIGHTNING AND GUSTY WINDS UP TO 35 MPH CAN BE EXPECTED. DAG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAY ME 637 PM EDT MON JUL 6 2009 MEZ007-008-062315- NORTHERN FRANKLIN-NORTHERN OXFORD- 637 PM EDT MON JUL 6 2009 ...STRONG THUNDERSTORMS WILL IMPACT OXFORD COUNTY AND FRANKLIN COUNTY THROUGH 715 PM EDT... AT 637 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 14 MILES SOUTHWEST OF COBURN GORE... MOVING NORTHEAST AT 15 MPH. THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND COBURN GORE THROUGH 715 PM EDT. HAIL UP TO ONE HALF INCH IN DIAMETER...HEAVY DOWNPOURS...LIGHTNING AND GUSTY WINDS UP TO 35 MPH CAN BE EXPECTED. DAG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAY ME 840 PM EDT MON JUL 6 2009 MEZ009-014-070130- CENTRAL SOMERSET-SOUTHERN SOMERSET- 840 PM EDT MON JUL 6 2009 ...STRONG THUNDERSTORMS WILL IMPACT SOMERSET COUNTY THROUGH 930 PM EDT... AT 839 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED OVER BRIGHTON...OR ABOUT 17 MILES SOUTHWEST OF GUILFORD...MOVING NORTHEAST AT 15 MPH. THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND MOSCOW...BRIGHTON... BINGHAM...MAYFIELD AND CAMBRIDGE THROUGH 930 PM EDT. HEAVY RAINFALL CAN BE EXPECTED...WITH LOCAL PONDING IN STREETS AND LOW-LYING AREAS. A SMALL STREAM FLOOD ADVISORY FOR MINOR FLOODING HAS ALSO BEEN ISSUED FOR CENTRAL SOMERSET COUNTY. DAG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAY ME 844 PM EDT MON JUL 6 2009 NHZ002>004-070130- NORTHERN CARROLL-NORTHERN GRAFTON-SOUTHERN COOS- 844 PM EDT MON JUL 6 2009 ...STRONG THUNDERSTORMS WILL IMPACT GRAFTON COUNTY...CARROLL COUNTY AND COOS COUNTY THROUGH 930 PM EDT... AT 843 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 5 MILES SOUTHWEST OF TWIN MOUNTAIN...OR ABOUT 6 MILES SOUTHEAST OF BETHLEHEM...MOVING NORTHEAST AT 20 MPH. THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND FRANCONIA NOTCH STATE PARK...LINCOLN...FRANCONIA...BETHLEHEM...TWIN MOUNTAIN... CRAWFORD NOTCH...CARROLL...CRAWFORD NOTCH STATE PARK...MOUNT WASHINGTON AND JEFFERSON THROUGH 930 PM EDT. SMALL HAIL...HEAVY DOWNPOURS...LIGHTNING AND GUSTY WINDS UP TO 35 MPH CAN BE EXPECTED. DAG
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAY ME 846 PM EDT MON JUL 6 2009 NHZ001-002-070130- NORTHERN COOS-SOUTHERN COOS- 846 PM EDT MON JUL 6 2009 ...STRONG THUNDERSTORMS WILL IMPACT COOS COUNTY THROUGH 930 PM EDT... AT 846 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 3 MILES NORTH OF STRATFORD...OR ABOUT 14 MILES SOUTH OF COLEBROOK...MOVING NORTHEAST AT 25 MPH. THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND STRATFORD...GROVETON... NORTH STRATFORD...LEMINGTON...COLEBROOK...MOLLIDGEWOCK STATE PARK... STEWARTSTOWN...MILLSFIELD...ERROL AND DIXVILLE NOTCH STATE PARK THROUGH 930 PM EDT. SMALL HAIL...HEAVY DOWNPOURS...CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS UP TO 35 MPH CAN BE EXPECTED. DAG
The Portland,ME radar (KGYX), 133 km away, was scanning. The volume nearest the first event began at 01:14 UTC.
1 flash flood. Local standard time, as filed.
Thunderstorms redeveloping over the same general area just east of Bingham resulted in 3 to 5 inches of rain in 3 hours. This caused numerous washouts on Mahoney Hill Road which was closed by the state police.
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: 190176.