Severe thunderstorms developed across northern Maine during the afternoon of the 3rd in advance of an approaching upper level disturbance and slow moving cold front. The storms developed during the mid afternoon and persisted into the evening.
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 CAR wrote it up.
Severe thunderstorms developed across northern Maine during the afternoon of the 3rd in advance of an approaching upper level disturbance and slow moving cold front. The storms developed during the mid afternoon and persisted into the evening. The storms produced strong damaging winds. Some locations across northeast Aroostook county were struck by several severe storms during the event.
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 3, 8:53 AM EST, 5 hours 52 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CARIBOU ME 953 AM EDT MON AUG 3 2015 .SYNOPSIS... A COLD FRONT WILL APPROACH THE REGION FROM THE WEST TODAY. THE FRONT WILL VERY SLOWLY CROSS THE AREA TUESDAY. A SECONDARY COLD FRONT WILL CROSS THE AREA WEDNESDAY. HIGH PRESSURE WILL BUILD TOWARD NORTHERN NEW ENGLAND TOWARD THE END OF THE WEEK. && .NEAR TERM /THROUGH TONIGHT/... 945 AM UPDATE... TWEAKS TO HRLY T/TD GRIDS WITH THIS UPDATE AS TEMPS ARE WARMING QUICKER THAN ANTICIPATED UNDER SRLY FLOW AND SUNNY SKIES. WINDS HV INCREASED AND ARE BEGINNING TO GUST FM THE SOUTH THUS HV BOOSTED WIND SPEEDS UP. SHOWERS HV DVLPD BACK ACRS ERN QUEBEC FROM THE GULF OF ST. LAWRENCE DOWN TO MONTREAL AND WL SPREAD EAST THRU THE DAY. THIS IS IN CONJUNCTION WITH LEAD VORT MAX AND FRCG FM H7-H5 JET OF 50KTS. THINKING RMNS THE SAME WITH REGARD TO SVR WX DVLPMNT THIS AFTN. EXPECT A TROF OF LOPRES PER ALL HIRES MODELS TO DVLP ALONG THE INTERNATIONAL BORDER BY 21Z. AIRMASS WL DESTABILIZE WITH CAPES RANGING FM 1000-1500 J/KG AND 0-6KM SHEAR VALUES OF ARND 40KTS. MAIN SVR THREAT LOOKS TO EXIST OVR NW ZONES AS OF THIS TIME. PREV DISCUSSION BLO... PREVIOUS DISCUSSION A WARMER AND MORE HUMID AIR MASS WILL OVERSPREAD THE REGION TODAY IN ADVANCE OF A SLOW MOVING COLD FRONT APPROACHING FROM THE WEST. HIGH TEMPERATURES ARE EXPECTED TO CLIMB INTO THE LOW TO MID 80S ACROSS MUCH OF THE REGION THIS AFTERNOON AWAY FROM THE IMMEDIATE COAST. A LARGE SCALE UPPER TROF CENTERED TO THE WEST OF JAMES BAY WILL TRACK SLOWLY EAST THROUGH TONIGHT. MODELS ARE INDICATING A LINE OF SHOWERS AND THUNDERSTORMS IS EXPECTED TO DEVELOP WELL OUT AHEAD OF THE APPROACHING FRONT, AND THEN INTO WESTERN MAINE BY LATE THIS AFTERNOON. SOME OF THE STORMS HAVE THE POTENTIAL TO BE SEVERE WITH STRONG WINDS WITH 0-6 KM BULK SHEAR VALUES OF 30 TO 40 KT. LARGE HAIL WILL ALSO BE POSSIBLE. THE GREATEST THREAT FOR SEVERE STORMS WILL BE ACROSS NORTHERN AND WESTERN AREAS CLOSER TO THE BETTER DYNAMICS ASSOCIATED WITH THE UPPER TROF. THE STORM PREDICTION CENTER HAS PLACED MUCH OF NORTHERN AND WESTERN MAINE IN A SLIGHT RISK. THUNDERSTORMS ARE EXPECTED TO CONTINUE TO SLOWLY TREK EAST THROUGH EARLY THIS EVENING BEFORE WEAKENING AS THEY MOVE INTO A MORE STABLE ENVIRONMENT LATER THIS EVENING. HOWEVER, SCATTERED SHOWERS AND THUNDERSTORMS MAY CONTINUE WELL INTO THE EVENING ACROSS NORTHERN AND WESTERN AREAS. EXPECT PLENTY OF LOW LEVEL MOISTURE ACROSS THE REGION WITH DEW POINTS IN THE 60S OVERNIGHT. THIS WILL LEAD TO PATCHY FOG OVERNIGHT. && .SHORT TERM /TUESDAY THROUGH WEDNESDAY/... A COLD FRONT WILL WORK ACROSS THE CWA TUE. IT WILL BE A HUMID DAY AHEAD OF THE FRONT. THE BEST CHANCE THAT STORMS COULD TURN STRONG OR SEVERE WILL BE ACROSS THE EASTERN HALF OF THE CWA. MUCH WILL DEPEND ON HOW STABLE IT REMAINS IN THE WAKE OF CONVECTION THAT WILL WORK ACROSS THE AREA MON NIGHT. THE FRONT WILL PUSH OFFSHORE TUE NIGHT AND ALLOW A LESS HUMID AIR MASS TO SPREAD ACROSS THE REGION. AN UPPER LOW WILL MOVE EAST ACROSS CENTRAL QUEBEC WED KEEPING THE REGION IN CYCLONIC FLOW ALOFT. MOISTURE AND DISTURBANCES ROTATING ACROSS THE AREA WILL LIKELY PRODUCE A FEW MORE SHOWERS. A THUNDERSTORM WILL BE POSSIBLE ACROSS NORTHERN MAINE...BUT THE SEVERE THREAT WILL BE DIMINISHED. LOWER FREEZING LEVELS AS THE ATMOSPHERE COOLS COULD LEAD TO SOME SMALL HAIL FROM ANY STORMS THAT DEVELOP. TEMPERATURES WILL BE MUCH COOLER WED WITH HIGHS 65 TO 70 OVER NW MAINE TO THE MID 70S IN THE BANGOR AREA AND ACROSS MOST OF THE DOWN EAST REGION. && .LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... AN UPPER TROUGH IN QUEBEC CONTINUES EAST AND INTO THE NW ATLANTIC THU NIGHT. ANOTHER SHORTWAVE TROUGH IS EXPECTED TO DIVE SE THROUGH QUEBEC FRI AND WILL MOVE EAST OF THE AREA SAT. A SFC LOW IS EXPECTED TO PASS OFF THE COAST WELL SOUTH OF THE REGION LATE IN THE WEEK. 500 MB HEIGHTS WILL BE ON THE INCREASE OVER THE WEEKEND WITH MODERATION OF THE AIR MASS. TEMPERATURES ARE EXPECTED TO BE A LITTLE BELOW NORMAL LATE IN THE WEEK AND NEAR TO A BIT ABOVE NORMAL BY SUN. MAINLY DRY WEATHER IS EXPECTED THROUGH THE PERIOD WITH ONLY THE OUTSIDE CHANCE OF A BRIEF PASSING SHOWER DURING THE AFTERNOON AND EARLY EVENING HOURS...MAINLY OVER THE HIGHER TERRAIN OF THE WEST. && .AVIATION /14Z MONDAY THROUGH FRIDAY/... NEAR TERM: VFR CONDITIONS ARE EXPECTED AT ALL TERMINALS TO START THE DAY. THUNDERSTORMS ARE EXPECTED TO DEVELOP FROM WEST TO EAST LATE THIS AFTERNOON AND THEN SLOWLY MOVE EAST THROUGH EARLY THIS EVENING. EXPECT MVFR/IFR CONDITIONS TONIGHT IN SCT SHOWERS AND TSTMS AND IN DEVELOPING LOW CLOUDS AND PATCHY FOG LATE TONIGHT. SHORT TERM: SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TUE. STRONG/ERRATIC WIND GUSTS AND HAIL ALONG WITH BRIEF IFR VSBY IN ANY HEAVIER T-STORMS. MOSTLY VFR WED-FRI...BUT WITH A FEW POCKETS OF MVFR ESPECIALLY WED IN SHOWERS AT THE NORTHERN TERMINALS. && .MARINE... NEAR TERM: WINDS/SEAS SHOULD REMAIN BELOW SMALL CRAFT ADVISORY LEVELS THROUGH TONIGHT, ALTHOUGH SEAS MAY BEGIN TO BUILD TO AROUND 5 FT TOWARD DAYBREAK. VISIBILITY WILL DECREASE TO 1 TO 3 NM IN SCATTERED SHOWERS AND AREAS OF FOG OVERNIGHT. SHORT TERM: THE SEAS ARE EXPECTED TO BUILD TO AROUND 5 FT ON THE COASTAL WATERS TUE AND TUE NIGHT AND IT IS POSSIBLE A SMALL CRAFT ADVISORY WILL BE NEEDED...BUT AS IS USUALLY THE CASE IN THE SUMMER THE MODELS ARE LIKELY A BIT TOO AGGRESSIVE WITH THE WIND SPEEDS AND THUS THE SEAS. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...NONE. MARINE...NONE. && NEAR TERM...DUDA/FARRAR SHORT TERM...CB LONG TERM...CB AVIATION...DUDA/FARRAR/CB MARINE...DUDA/FARRAR/CB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CARIBOU ME 118 PM EDT MON AUG 3 2015 MEZ001>006-010-041730- NORTHWEST AROOSTOOK-NORTHEAST AROOSTOOK-NORTHERN SOMERSET- NORTHERN PISCATAQUIS-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK- CENTRAL PISCATAQUIS- 118 PM EDT MON AUG 3 2015 ...SEVERE THUNDERSTORM WATCH 466 IN EFFECT UNTIL 9 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL MAINE...FAR NORTHERN MAINE...NORTH CENTRAL MAINE...NORTHERN MAINE AND WEST CENTRAL MAINE. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MEZ016-017-032-041730- INTERIOR HANCOCK-CENTRAL WASHINGTON-NORTHERN WASHINGTON- 118 PM EDT MON AUG 3 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN MAINE AND INTERIOR DOWNEAST MAINE. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MEZ011-015-031-041730- CENTRAL PENOBSCOT-SOUTHERN PENOBSCOT-SOUTHERN PISCATAQUIS- 118 PM EDT MON AUG 3 2015 ...SEVERE THUNDERSTORM WATCH 466 IN EFFECT UNTIL 9 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL MAINE...INTERIOR DOWNEAST MAINE AND NORTH CENTRAL MAINE. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MEZ029-030-041730- COASTAL HANCOCK-COASTAL WASHINGTON- 118 PM EDT MON AUG 3 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR COASTAL DOWNEAST MAINE. .DAY ONE...THIS AFTERNOON AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. ANZ050>052-041730- COASTAL WATERS FROM EASTPORT, ME TO SCHOODIC POINT, ME OUT 25 NM- COASTAL WATERS FROM SCHOODIC POINT, ME TO STONINGTON, ME OUT 25 NM- INTRA COASTAL WATERS FROM SCHOODIC POINT, ME TO STONINGTON, ME- 118 PM EDT MON AUG 3 2015 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...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
1133 AM EDT MON AUG 03 2015
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0527 PM HAIL 5 SSE ELLSWORTH 44.48N 68.37W
08/01/2015 E1.00 INCH HANCOCK ME PARK/FOREST SRVC
QUARTER AND NICKEL SIZE HAIL CAUSED TENTS TO COLLAPSE AT
LAMOINE STATE PARK.
&&
DDUMONTThe Caribou radar (KCBW), 126 km away, was scanning. The volume nearest the first event began at 19:46 UTC.
12 thunderstorm wind. Local standard time, as filed.
Several trees were toppled around Eagle Lake by wind gusts estimated at 60 mph.
The roof was blown off a potato house by wind gusts estimated at 60 mph. The time is estimated.
Numerous trees and power lines were toppled by wind gusts estimated at 60 mph. Nickel size hail also occurred. The time is estimated.
The Caribou ASOS measured a wind gust of 62 mph.
A large tree was toppled on Collins Street by wind gusts estimated at 65 mph.
Numerous trees were toppled along Route 161 by wind gusts estimated at 65 mph.
Numerous trees were toppled by wind gusts estimated at 60 mph.
Two trees were toppled along the border between Connor Township and New Sweden by wind gusts estimated at 60 mph. The time is estimated.
Trees were toppled along Carson Road by wind gusts estimated at 60 mph.
Trees were toppled on to power lines along Lombard Road by wind gusts estimated at 60 mph.
Trees were toppled along Grimes Road by wind gusts estimated at 60 mph.
Roofing was torn from a house by wind gusts estimated at 60 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maine in 2015Every state in 2015This day in weather historyWarnings in Maine, August 2015
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: 598709, 598705, 598707, 598711, 598713, 598714, 598715, 598718, 598716, 598717, 598720, 598722.