An isolated severe thunderstorm produced damaging winds in northwest Aroostook county during the evening of the 6th.
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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 CAR wrote it up.
An isolated severe thunderstorm produced damaging winds in northwest Aroostook county during the evening of the 6th.
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 Caribou, ME wrote its last area forecast discussion before the first event at Aug 6, 5:07 PM EST, 1 hour 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CARIBOU ME 607 PM EDT SAT AUG 6 2011 .SYNOPSIS... HIGH PRESSURE WILL MOVE SOUTH OF THE REGION THROUGH TONIGHT. LOW PRESSURE WILL APPROACH LATER SUNDAY...THEN SLOWLY CROSS THE GULF OF MAINE MONDAY THROUGH TUESDAY. && .NEAR TERM /THROUGH SUNDAY/... UPDATE: ADDED TSTMS TO THE FCST TONIGHT BASED ON THE LATEST RUC AND LAPS DATA SHOWING ATMOSPHERE DESTABILIZING. SBCAPES SHOWN TO PUSH >800 JOULES THIS EVENING ACROSS THE NORTHERN AND WESTERN SECTIONS. INTERESTING HOW THE SWEAT INDEX SHOOTS TO 300+ W/THE SHOWALTER INDICES HITTING -2. SOME TSTMS COULD BE QUITE STRONG IF THESE VALUES ARE CORRECT. ATTM...KEPT TSTMS AS GENERAL. WILL ASSESS FOR FURTHER DEVELOPMENT. PREVIOUS DISCUSSION... WEAK SURFACE LOW PRESSURE EXPECTED TO APPROACH FROM THE NORTH TONIGHT WITH RESULTING IN SHOWERS. LOW PRESSURE IS EXPECTED TO DEVELOP OVER SOUTHERN NEW ENGLAND. HEAVIEST PRECIPITATION FROM THIS SYSTEM EXPECTED TO STAY TO THE SOUTH OF OUR AREA AS THIS SYSTEM MOVES TO THE EAST. WILL USE A BLEND OF THE NAM12...GFS40 AND SREF FOR POP GRIDS. HAVE USE THE LAMP25 TO DELINEATE THE AREAS OF FOG TONIGHT INTO SUNDAY MORNING. WILL USE A BLEND OF THE NAM12 AND GMOS FOR WINDS. HAVE USE THE GMOS TO INITIALIZE THE TEMPERATURE AND DEW POINT GRIDS. WILL EXTEND THE MAXIMUM/MINIMUM RANGE. FOR QPF WILL BLEND THE NAM12 AND GFS40. && .SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/... THE MODELS ARE IN GOOD GENERAL AGREEMENT OVER THE COURSE OF THE NEAR TERM. A BROAD AREA OF LOW PRESSURE WITH MULTIPLE LOWS WILL BE EXTENDED ACROSS THE REGION AT THE START OF THE NEAR TERM. THESE LOW WILL ROTATE AROUND THE UPPER LEVEL SUPPORT. BY MONDAY MORNING THE PRIMARY LOW WILL MOVE EAST INTO THE GULF OF MAINE...HOWEVER THE OTHER LOW WILL REMAIN OVER MAINE UNTIL TUESDAY MORNING. THE UPPER LEVEL LOW WILL MOVE EAST OVER EASTERN NEW BRUNSWICK TUESDAY MORNING ALLOWING A WEAK HIGHER PRESSURE RIDGE TO BRIEFLY BUILD INTO THE AREA. BY THE END OF THE PERIOD ANOTHER LOW PRESSURE SYSTEM WILL BEGIN TO INFLUENCE THE WEATHER FOR WESTERN MAINE. LOADED BLENDS OF GFS/NAM/MOS FOR POP/SKY/WNDS. ADDED 20 PERCENT FOR WIND GUSTS ACROSS THE WATERS...15 PERCENT FOR OVER LAND. USED NAWAVE 4 FOR SEAS. USED MOS GUIDE FOR MAX/MIN TEMPS. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... UNSETTLED WEATHER TO START THE PERIOD AS AN UPPER LEVEL TROF SWINGS ACROSS NEW ENGLAND. SERIES OF SHORT WAVES MOVING THROUGH THE UPPER TROF WILL RESULT IN PERIODS OF SHOWERS FROM TIME TO TIME. WILL INCLUDE THE CHANCE FOR THUNDERSTORMS ON THURSDAY AS FLOW BECOMES MORE SOUTHWEST AND CAPES INCREASE. AS THE LAST OF THE SHORT WAVES MOVES EAST THURSDAY AFTERNOON EXPECT HIGH PRESSURE TO BUILD TOWARD THE REGION FROM THE WEST WITH A RETURN TO DRY WEATHER FOR THE LATE PART OF THE WEEK AND NEXT WEEKEND. && .AVIATION /22Z SATURDAY THROUGH THURSDAY/... NEAR TERM: EXPECT EXPECT IFR/MVFR CONDITIONS TO DEVELOP TONIGHT IN SHOWERS AND FOG AND PERSIST INTO SUNDAY. SHORT TERM: GENERALLY UNSETTLED WEATHER THROUGH MUCH OF THE PERIOD. RAIN EARLY IN THE PERIOD WILL GIVE WAY TO A BRIEF PERIOD TUESDAY MORNING... FOLLOWED BY SHOWERS AND THUNDERSTORMS TUESDAY AFTERNOON AND EVENING. MVFR SKY CONDITIONS WILL DETERIORATE TO PERIODS OF IFR IN PRECIPITATION. && .MARINE... NEAR TERM: HAVE USED A BLEND OF THE NAM12 AND GFS40 FOR WINDS. FOR WAVES EXPECT SOUTHERLY/SOUTHEASTERLY FETCH TO DEVELOP THIS EVENING AND PERSIST INTO SUNDAY EVENING. EXPECT THIS TO GENERATE LONG PERIOD WAVE SUNDAY AND SUNDAY NIGHT. WILL USE THE SWAN/NAM FOR WAVE GRIDS. WILL NOT ISSUE SCA SINCE EXPECT WAVE HEIGHTS TO TOP OFF AT AROUND 4 FEET. SHORT TERM: UNSETTLED WEATHER THROUGH MUCH OF THE PERIOD WITH RAIN MONDAY AND SHOWERS ON TUESDAY. WINDS AND SEAS WILL REMAIN BELOW SCA. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...NONE. MARINE...NONE. && NEAR TERM...HEWITT/MIGNONE SHORT TERM...NORTON LONG TERM...DUDA AVIATION...HEWITT/MIGNONE MARINE...HEWITT/MIGNONE/NORTON
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE CARIBOU ME 627 PM EDT SAT AUG 6 2011 MEZ001>006-010-072230- NORTHWEST AROOSTOOK-NORTHEAST AROOSTOOK-NORTHERN SOMERSET- NORTHERN PISCATAQUIS-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK- CENTRAL PISCATAQUIS- 627 PM EDT SAT AUG 6 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL MAINE...NORTH CENTRAL MAINE...NORTHERN MAINE AND WEST CENTRAL MAINE. .DAY ONE...TONIGHT. THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE SMALL HAIL...WIND GUSTS UP TO 45 MPH AND VERY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ARE ENCOURAGED TO RELAY ANY WIND...HAIL OR HEAVY RAINFALL REPORTS TO THE NATIONAL WEATHER SERVICE IN CARIBOU. MEZ011-015>017-029>032-072230- CENTRAL PENOBSCOT-SOUTHERN PENOBSCOT-INTERIOR HANCOCK- CENTRAL WASHINGTON-COASTAL HANCOCK-COASTAL WASHINGTON- SOUTHERN PISCATAQUIS-NORTHERN WASHINGTON- 627 PM EDT SAT AUG 6 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL MAINE...NORTH CENTRAL MAINE AND SOUTHEAST MAINE. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ050>052-070-072230- COASTAL WATERS FROM EASTPORT ME TO SCHOODIC POINT ME OUT 25 NM- COASTAL WATERS FROM SCHOODIC POINT ME TO STONINGTON ME OUT 25 NM- INTRACOASTAL WATERS FROM SCHOODIC POINT ME TO STONINGTON ME- WATERS FROM EASTPORT ME TO STONINGTON (DEER ISLE) ME FROM 25 TO 40 NM- 627 PM EDT SAT AUG 6 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HEWITT
The Caribou radar (KCBW), 152 km away, was scanning. The volume nearest the first event began at 00:03 UTC.
1 thunderstorm wind. Local standard time, as filed.
Trees were toppled along Route 161 by wind gusts estimated at 60 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maine in 2011Every state in 2011This day in weather historyWarnings in Maine, August 2011
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: 339885.