combined to produce Heat Index readings in the mid to upper 90s.
Every event with a place to put it; 5 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
Temperatures ranging from the upper 80 to lower 90s...along with dewpoints of around 70 to the lower 70s...combined to produce Heat Index readings in the mid to upper 90s.
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 Jul 20, 8:50 AM EST, 2 hours 10 minutes earlier.
Area Forecast Discussion National Weather Service Caribou ME 950 AM EDT Mon Jul 20 2020 .SYNOPSIS... A cold front will cross the region today. High pressure will build across the region Tuesday. A weather disturbance will begin to approach from the west Wednesday then move into the region Thursday. High pressure will begin to build toward the region from the west Friday. && .NEAR TERM /THROUGH TONIGHT/... 945 AM Update... Adjustments were made to the hrly temps/dewpoints to bring them to the latest obs. Clouds and earlier rain have slowed the warming by about and hr or so. Clouds are pushing out per the latest satl imagery leading to some clearing and then the warming should take off. The 12z sfc analysis showed the cold front hanging back across the St. Lawrence River and about 2 hrs behind the latest high resolution guidance. A look at the NAMNEST/RAP soundings show best instability being transferred across the Maine Central Highlands across the Bangor and interior Downeast this afternoon. The last few runs of the HRRR model showed activity to be scattered at best. Kept the enhanced wording for heavy rainfall and gusty winds in for these area. Further n, atmosphere has been stabilized by the early rain. A look as some the instability parameters for the afternoon show some CAPE around 600 joules but lapse rates are meager and the column continues to dry above 850 mbs. An isolated storm is possible across portions of the n and w, but nothing organized. Heat Advisory remains in place for the Bangor region as heat indices could reach 95 degrees or so this afternoon. Previous Discussion... Have issued a Heat Advisory for southern Penobscot county today for heat indices in the mid 90s. A cold front currently approaching the Saint Lawrence River Valley will cross northern Maine through the morning. The front will cross central and Downeast areas through the afternoon, exiting the Downeast coast this evening. Scattered showers/thunderstorms will occur in advance of the front. Based on the timing of the front and diurnal instability, expect a few strong thunderstorms are possible this afternoon and evening south of a line from Dover- Foxcroft, to Lincoln, to Danforth with gusty winds and locally heavy downpours possible. Could have lingering evening showers/thunderstorms Downeast with the exiting front, then decreasing clouds in the wake of the front. Expect partly cloudy/mostly clear skies across northern and central portions of the forecast area tonight. Warm humid conditions will occur in advance of the front. High temperatures today will range from the mid to upper 80s north, to the upper 80s to around 90 interior Downeast with mid 70s to mid 80s along the Downeast coast. Low temperatures tonight will range through the 50s north, to around 60 to the lower 60s Downeast. && .SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/... Secondary cdfnt wl bring drier air and clearing skies to the region by Tue morning. H5 flow wl be fairly zonal thru the end of the short term. At the surface, 1020mb sfc high wl be building ewrd twd the FA drg the day Tue fm the Great Lakes. Maxes on Tue wl range fm about 8- 12 degrees cooler than Monday. Temps ovr nrn areas wl be blo normal and nr to slightly abv normal with offshore flow expected. Moclr skies and light winds wl allow min temps on Wed morning to drop blo normal with nr 50/l50 common acrs nrn Aroostook. High clouds wl begin to appch fm the west twd daybreak on Wed. Hv slowed down timing of pcpn on Wed with showers likely not getting into wrn area until late aftn and/or early evening given extent of dry air to overcome. Latest NAM is much drier than GFS with PW values for Wed night through GFS has maintained run-to-run consistency when compared to other med range guidance. For this reason hv delayed start time of showers until late Wed aftn and hv also rmvd thunder chcs until elevated instability appchs closer to midnight Wed night. && .LONG TERM /THURSDAY THROUGH SUNDAY/... By Thu morning upr lvl flow transitions to more of a swrly flow as ridging builds into central Plains with s/wv mvg thru Quebec and approaching the CWA. Instability looks to be present on Thu acrs most of the region though models differ on movement of sfc low, thus wmfnt. Hv sided more twd typical summer pattern with slgt chc thunder for all but immediate coast drg the day Thur tho may see thunder Thu evng as cdfnt gets dragged thru. High pressure then builds in for the weekend with another system possible with 595 high setting up acrs central sxns of the country. This lkly to leave northeastern U.S. in troffing and s/wv zipping thru with unsettled wx expected thru end of the extndd. && .AVIATION /14Z MONDAY THROUGH FRIDAY/... NEAR TERM: Patchy fog is possible early this morning. Variable conditions, generally MVFR/IFR, will then occur with any showers or thunderstorms today into the evening in advance of a cold front crossing the region. Gusty winds and locally heavy downpours are possible with any thunderstorms Downeast this afternoon into the evening. South to southwest winds will gust up to 25 mph in advance of the cold front today. VFR conditions are expected across the region tonight in the wake of the cold front. SHORT TERM: Tue-Wed...VFR. Light NW wind Tue/Tue night becoming SSW around 5kts Wed. Wed night-Thu...MVFR/IFR in showers and possible -tsra. Best potential for restrictions over Downeast terminals. Light S winds Wed night, then lgt/vrb on Thu. Thu night-Fri...Lingering restrictions Thu night then becoming VFR on Fri. NW around 5kts. && .MARINE... NEAR TERM: Conditions are expected to remain slightly below small craft advisory levels today, with 4 to 5 foot seas and wind gusts up to around 20 knots. However, conditions will have to be monitored for a possible low end small craft advisory this afternoon and evening. Conditions are expected to be below small craft advisory levels tonight. Visibilities will be reduced at times in fog today into this evening. Showers and thunderstorms are also possible today, with the better chances this afternoon and evening. SHORT TERM: Seas and winds will remain below SCA level through the end of the week. Seas range between 2-4 feet Tue-Friday. Fog may restrict visibilities again overnight Wed night and Thu night. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...Heat Advisory until 7 PM EDT this evening for MEZ015. MARINE...None. && Near Term...Hewitt/Norcross Short Term...Farrar Long Term...Farrar Aviation...Hewitt/Norcross/Farrar Marine...Hewitt/Norcross/Farrar
Hazardous Weather Outlook National Weather Service Caribou ME 613 AM EDT Mon Jul 20 2020 MEZ001>006-010-211200- Northwest Aroostook-Northeast Aroostook-Northern Somerset- Northern Piscataquis-Northern Penobscot-Southeast Aroostook- Central Piscataquis- 613 AM EDT Mon Jul 20 2020 This Hazardous Weather Outlook is for Central Highlands Maine, Far Eastern Maine, Far Northern Maine and North Woods Maine. .DAY ONE...Today 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. MEZ011-016-017-029>032-211200- Central Penobscot-Interior Hancock-Central Washington- Coastal Hancock-Coastal Washington-Southern Piscataquis- Northern Washington- 613 AM EDT Mon Jul 20 2020 This Hazardous Weather Outlook is for Central Highlands Maine, Coastal DownEast Maine, Far Eastern Maine, Interior DownEast Maine and Penobscot Valley Maine. .DAY ONE...Today and Tonight. Scattered thunderstorms could produce gusty winds and heavy downpours this afternoon into the evening. .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. MEZ015-211200- Southern Penobscot- 613 AM EDT Mon Jul 20 2020 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS EVENING... This Hazardous Weather Outlook is for Penobscot Valley Maine. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Scattered thunderstorms could produce gusty winds and heavy downpours this afternoon into the evening. .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>052-211200- 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- 613 AM EDT Mon Jul 20 2020 This Hazardous Weather Outlook is for Atlantic Coastal Waters. .DAY ONE...Today 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.
The national radar mosaic for the moment the first event began.
5 heat. Local standard time, as filed.
Temperatures ranging from the upper 80s to lower 90s...along with dewpoints of around 70 to the lower 70s...combined to produce Heat Index readings in the mid to upper 90s.
Temperatures ranging from the upper 80s to lower 90s...along with dewpoints of around 70 to the lower 70s...combined to produce Heat Index readings in the mid to upper 90s.
Temperatures ranging from the upper 80s to lower 90s...along with dewpoints of around 70 to the lower 70s...combined to produce Heat Index readings in the mid to upper 90s.
Temperatures ranging from the upper 80s to lower 90s...along with dewpoints of around 70 to the lower 70s...combined to produce Heat Index readings in the mid to upper 90s.
Temperatures ranging from the upper 80s to lower 90s...along with dewpoints of around 70 to the lower 70s...combined to produce Heat Index readings in the mid to upper 90s.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maine in 2020Every state in 2020This day in weather historyWarnings in Maine, July 2020
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: 910323, 910324, 910325, 910327, 910328.