Severe thunderstorms in advance of a cold front crossing the region produced isolated wind damage across portions of Penobscot county during the afternoon 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.
Severe thunderstorms in advance of a cold front crossing the region produced isolated wind damage across portions of Penobscot county during the afternoon 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 May 6, 1:44 PM EST, 49 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CARIBOU ME 244 PM EDT THU MAY 6 2010 .SYNOPSIS... LOW PRESSURE WILL TRACK NORTH OF THE STATE TONIGHT. HIGH PRESSURE WILL BRIEFLY RIDGE ACROSS THE AREA FRIDAY INTO FRIDAY NIGHT. LOW PRESSURE APPROACHING FROM THE WEST WILL TRACK ACROSS SOUTHERN MAINE ON SATURDAY AND CONTINUE INTO THE MARITIMES ON SUNDAY. && .NEAR TERM /THROUGH TONIGHT/... SHOWERS AND SOME THUNDERSTORMS WILL AFFECT THE AREA EARLY THIS EVENING AS A VIGOROUS UPPER LEVEL TROUGH MOVES ACROSS THE NORTH BRINGING SUBSTANTIAL COOLING ALOFT. THE TROUGH WILL BE INTENSIFYING SURFACE LOW PRESSURE TO OUR NORTH AND NORTHEAST OVERNIGHT. AN INCREASING GRADIENT BEHIND THIS LOW WILL BRING A GUSTY WEST TO NORTHWEST WIND AND SOME DRYING OVERNIGHT. NORTHERN AREAS WILL REMAIN MOSTLY CLOUDY WHILE DRIER AIR ALLOWS SOUTHERN AREAS TO BECOME PARTIALLY CLEAR. TEMPS WILL DROP TO THE UPPER 30S BY MORNING IN THE FAR NORTHWEST...WITH LOW TO MID 40S EXPECTED ELSEWHERE. && .SHORT TERM /FRIDAY THROUGH SUNDAY/... EXPECT A STRONG NW FLOW BEHIND THE LOW PRESSURE SYSTEM FOR FRIDAY. GUSTS TO 30 MPH ARE PROBABLE. AS IS OFTEN THE CASE WITH NW FLOW...STRATCU AND CU WILL AFFECT NORTHERN AND EASTERN ZONES WHILE AREAS DOWNEAST AND BGR WILL HAVE DOWNSLOPE DRYING AND LESS CLOUD COVER. CLOUDS WILL GRADUALLY RETREAT NE DURING THE DAY. HIGH PRESSURE BUILDS FRIDAY NGT WITH RADIATIONAL COOLING PRODUCING LOWS IN THE 30S NORTH AND NEAR 40F SOUTH. LOW PRESSURE APPROACHES SATURDAY...STILL DISAGREEMENT ON TIMING...BUT BRINGING RAIN INTO SOUTHERN ZONES EARLY SATURDAY AND DELAYING ARRIVAL IN NORTH UNTIL AFTERNOON. THE ONSET OF SE FLOW AHEAD OF THE FLOW COULD PRODUCE SOME FOG IN COASTAL ZONES LATER SATURDAY INTO THE EVENING. LOW PRESSURE PASSES THROUGH THE STATE SATURDAY NGT WITH RAINFALL AMTS GENERALLY LESS THAN AN INCH. THE LOW WILL PULL OUT SUNDAY MONDAY...BRINGING IN ANOTHER COOL DAY WITH NW FLOW...SCATTERED SHOWERS...AND WIDESPREAD CLOUDINESS WHICH WILL DECREASE IN THE SOUTH NEAR BGR AS THE DAY PROGRESSES. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... LOADED GMOS... && .AVIATION /18Z THURSDAY THROUGH TUESDAY/... IFR CONDITIONS IN LOW CLOUDS AND SHOWERS EARLY THIS EVENING SHOULD IMPROVE TO VFR OVERNIGHT AS A GUSTY WEST WIND BRINGS IN DRIER AIR. SHORT TERM: MVFR IN NORTH EARLY FRIDAY...BCMG VFR BY MID-MORNING. IFR TO VLIFR WILL MOVE INTO SOUTHERN ZONES SATURDAY MORNING WITH FOG POSSIBLE AT BHB. THESE CONDITIONS WILL GRADUALLY MOVE NORTH DURING SATURDAY WITH NORTHERN AIRFIELDS SUCH AS PQI BCMG IFR BY LATE SATURDAY. IFR WILL BE THE RULE SATURDAY NGT INTO EARLY SUNDAY MORNING. CONDITIONS WILL IMPROVE TO VFR BY AFTERNOON ACROSS THE FORECAST AREA. && .MARINE... AN SCA WILL REMAIN IN EFFECT OVERNIGHT FOR WIND GUSTS UP TO 25 KT. SHORT TERM: ANOTHER SCA POSSIBLE LATER SATURDAY INTO EARLY SUNDAY WITH LOW PRESSURE MOVING NORTH OF THE WATERS. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 11 AM EDT FRIDAY FOR ANZ050-051. && NEAR TERM...BLOOMER SHORT TERM...MWALKER LONG TERM...LERICOS AVIATION...BLOOMER MARINE...BLOOMER/MWALKER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CARIBOU ME 301 PM EDT THU MAY 6 2010 MEZ001>006-010-011-015>017-029>032-071915- NORTHWEST AROOSTOOK-NORTHEAST AROOSTOOK-NORTHERN SOMERSET- NORTHERN PISCATAQUIS-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK- CENTRAL PISCATAQUIS-CENTRAL PENOBSCOT-SOUTHERN PENOBSCOT- INTERIOR HANCOCK-CENTRAL WASHINGTON-COASTAL HANCOCK- COASTAL WASHINGTON-SOUTHERN PISCATAQUIS-NORTHERN WASHINGTON- 301 PM EDT THU MAY 6 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL MAINE...NORTH CENTRAL MAINE...NORTHERN MAINE...SOUTHEAST MAINE AND WEST CENTRAL MAINE. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ050>052-071915- 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- 301 PM EDT THU MAY 6 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The Caribou radar (KCBW), 146 km away, was scanning. The volume nearest the first event began at 19:33 UTC.
3 thunderstorm wind. Local standard time, as filed.
Trees were toppled on Dover Road by wind gusts estimated at 60 mph.
Trees were toppled on Ridge Road by wind gusts estimated at 60 mph.
Several trees were toppled on Grand Lake Road by wind gusts estimated at 60 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maine in 2010Every state in 2010This day in weather historyWarnings in Maine, May 2010
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: 235164, 235165, 235166.