Alert archive / Maine / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 65, NWS Caribou, ME

July 20, 2013Hancock County, Washington County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jul 20, 2013, 4:21 PM EDT for Hancock County, Washington County, Maine. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 20, 2013, 4:21 PM EDT (20:21 UTC)
Expired: Jul 20, 2013, 5:15 PM EDT
In force: 54 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon

Counties Hancock County, ME, Washington County, ME

The radar

The Caribou radar (KCBW), 142 km from the middle of the area, began a volume at 20:24 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 8.4 hours before the alert went out and 380 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2810 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 9.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jul 20, 3:10 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, Jul 20, 3:10 PM EDT, 1 hour 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CARIBOU ME
310 PM EDT SAT JUL 20 2013

.SYNOPSIS...
A STRONG COLD FRONT WILL CROSS THE REGION TONIGHT. A DRIER AND
COOLER CANADIAN AIRMASS WILL THEN BUILD INTO THE AREA ON SUNDAY
AND HOLD OVER THE REGION THROUGH MONDAY. THE NEXT LOW PRESSURE
FROM THE GREAT LAKES WILL APPROACH THE REGION LATE MONDAY NIGHT
INTO TUESDAY.

&&

.NEAR TERM /THROUGH SUNDAY/...
A COLD FRONT WILL MOVE THROUGH THE REGION OVERNIGHT FOLLOWED BY
CANADIAN HIGH PRES FOR SUNDAY. THIS HIGH WILL REMAIN IN CONTROL
THROUGH EARLY NEXT WEEK.

SOME CONVECTION HAS FIRED UP MAINLY ACROSS NORTHERN AND WESTERN
AREAS(SUB-SEVERE) AS SOME UPPER LEVEL DIVERGENCE SEEN ON THE SATL
WV IMAGERY AND 12Z UA. THE BEST SHOT FOR ANY STRONGER STORMS WILL
BE ACROSS THE DOWNEAST AND COAST INTO THE EVENING AND THEN
ACTIVITY WILL WEAKEN. THE BEST FORCING AND INSTABILITY WILL SHIFT
TO THE EAST. ADDED SOME FOG TO THE GRIDS FOR TONIGHT INTO EARLY
SUNDAY MORNING BASED ON ANTICIPATED CLEARING AND COOLER TEMPERATURES
W/A WET GROUND. ADJUSTED THE OVERNIGHT LOW USING A BLEND OF THE NAM12
AND ECMWF. POPS ARE A BLEND OF THE RUC AND DOWNSCALED NAM WHICH
SHOW PRECIP CHANCES WINDING DOWN AFTER 00Z.

SUNDAY LOOKS TO BE SUNNY AND PLEASANT W/HIGH PRES BUILDING IN FROM
CANADA. THINKING ATTM IS TO TAKE W/CONSISTENCY AND KEEP THE
MIDNIGHT CREW'S MAXES OF LOWER 70S NORTHERN CWA AND MID TO UPPER
70S CENTRAL AND DOWNEAST.

&&

.SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/...
HIGH PRESSURE WILL SETTLE OVER THE AREA SUNDAY NIGHT. WITH LIGHT
WINDS...CLEAR SKIES AND RELATIVELY DRY AIR THE NIGHT WILL BE COOL
WITH LOWS DROPPING INTO THE 40S NORTH TO NEAR 50 DOWNEAST. THIS
WILL BE FOLLOWED BY A MOSTLY SUNNY AND SEASONABLE DAY ON MONDAY.
CLOUDS WILL BEGIN TO INCREASE FROM THE SOUTHWEST LATE IN THE DAY
AS MOISTURE LIFTS NORTH FROM LOW PRESSURE TRACKING INTO SOUTHERN
NEW ENGLAND. CLOUDS WILL CONTINUE TO INCREASE MONDAY NIGHT AND
SOME RAIN MAY SPREAD INTO THE AREA LATE. THE BEST CHANCE FOR RAIN
WILL BE ALONG THE FRONTAL BOUNDARY WHICH WILL BE NEAR THE COAST.
THE LOW WILL TRACK JUST OFFSHORE ON TUESDAY BRINGING A CHANCE OF
RAIN TO THE AREA. THE BEST CHANCE FOR RAIN WILL BE ALONG COASTAL
AREAS. A COLD FRONT WILL APPROACH THE WEST LATE IN THE DAY. WARM
AND HUMID AIR MOVING NORTH AHEAD OF THE FRONT BENEATH RELATIVELY
COOLER AIR ALOFT MAY PRODUCE SOME THUNDERSTORMS IN WESTERN AREAS
LATE IN THE DAY.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
A WEAK LOW WILL BE TRACKING OFF THE COAST TUESDAY NIGHT AS A COLD
FRONT APPROACHES FROM THE WEST. THE LOW MAY BRING SOME RAIN TO
COASTAL AREAS EARLY TUESDAY NIGHT WHILE THE APPROACHING FRONT
BRINGS SOME SHOWERS AND POSSIBLY THUNDERSTORMS TO FAR WESTERN
AREAS. THE FRONT IS EXPECTED TO CROSS THE AREA EARLY WEDNESDAY
BRINGING SOME SHOWERS AND ISOLATED THUNDERSTORMS MAINLY TO THE
DOWNEAST REGION. HIGH PRESSURE SHOULD THEN BRING DRIER AIR WITH
CLEARING LATER WEDNESDAY INTO THURSDAY. ANOTHER FRONT MAY APPROACH
LATER FRIDAY INTO SATURDAY WITH INCREASED HUMIDITY FRIDAY INTO
SATURDAY.

&&

.AVIATION /16Z SATURDAY THROUGH WEDNESDAY/...
NEAR TERM: UNSETTLED CONDITIONS THROUGH AT THE START OF THE
PERIOD. MVFR NORTH...BECMG VFR EARLY EVENING. A BRIEF PERIOD OF
MVFR AND PERHAPS IFR FOR KBHB/KBGR THROUGH TONIGHT IN SHRA/TSRA
AND SOME FOG. VFR ALL SITES ON SUNDAY.

SHORT TERM: VFR CONDITIONS ARE EXPECTED SUNDAY NIGHT INTO MONDAY
WITH HIGH PRESSURE AND MOSTLY CLEAR SKIES. CONDITIONS WILL LIKELY
BEGIN VFR MONDAY NIGHT BUT MAY LOWER TO MVFR OR IFR LATE AS LOW
CLOUDS AND SHOWERS MOVE IN. MVFR CONDITIONS ARE EXPECTED TUESDAY
NIGHT INTO EARLY WEDNESDAY. HIGH PRESSURE MAY THEN BRING AN
IMPROVEMENT TO VFR WEDNESDAY INTO EARLY FRIDAY. LOWERING CLOUDS
AND SHOWERS MAY LOWER CONDITIONS TO MVFR FRIDAY NIGHT INTO
SATURDAY AS THE NEXT FRONT MOVES IN.

&&

.MARINE...
NEAR TERM: SEAS 3-5 FT ATTM. WAVE GUIDANCE INCLUDING THE SWAN
RUNNING TOO HIGH AS THE LATEST OBS SHOWED NO MORE THAN 4 FT(44027).
WINDS ARE EXPECTED TO BECOME GUSTY W/THE COLD FRONT TONIGHT W/SPEEDS
OF 25 KT BRIEFLY. THE WINDS WILL SUBSIDE ON SUNDAY DOWN TO 10 KT AS
HIGH PRES PUSHES E.

SHORT TERM: WINDS AND SEAS ARE EXPECTED TO REMAIN BELOW SCA THIS
WEEKEND INTO EARLY NEXT WEEK. HIGH PRESSURE SHOULD BRING CLEAR AND
PLEASANT CONDITIONS SUNDAY INTO MONDAY. LOWER CLOUDS...FOG AND
SOME RAIN MAY MOVE OVER THE WATERS ON TUESDAY.

&&

.CAR WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
MARINE...NONE.

&&

NEAR TERM...NORTON/HEWITT
SHORT TERM...BLOOMER
LONG TERM...BLOOMER
AVIATION...NORTON/HEWITT/BLOOMER
MARINE...NORTON/BLOOMER

Hazardous weather outlook, Jul 20, 3:15 PM EDT, 1 hour 6 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CARIBOU ME
315 PM EDT SAT JUL 20 2013

MEZ001>006-010-211915-
NORTHWEST AROOSTOOK-NORTHEAST AROOSTOOK-NORTHERN SOMERSET-
NORTHERN PISCATAQUIS-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK-
CENTRAL PISCATAQUIS-
315 PM EDT SAT JUL 20 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL MAINE...NORTH
CENTRAL MAINE...NORTHERN MAINE AND WEST CENTRAL MAINE.

.DAY ONE...THIS AFTERNOON AND 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.

MEZ011-015>017-029>032-211915-
CENTRAL PENOBSCOT-SOUTHERN PENOBSCOT-INTERIOR HANCOCK-
CENTRAL WASHINGTON-COASTAL HANCOCK-COASTAL WASHINGTON-
SOUTHERN PISCATAQUIS-NORTHERN WASHINGTON-
315 PM EDT SAT JUL 20 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL MAINE...NORTH
CENTRAL MAINE AND SOUTHEAST MAINE.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FEW THUNDERSTORMS COULD BE STRONG INTO THE EVENING WITH THE MAIN
THREAT BEING STRONG WIND GUSTS. HAIL IS A POSSIBILITY IN ANY OF
THE STRONGER STORMS.

.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>052-211915-
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-
315 PM EDT SAT JUL 20 2013

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...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

HEWITT

In the hours before

Local storm report, Jul 20, 1:45 PM EDT, 2 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
145 PM EDT SAT JUL 20 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 PM     TSTM WND DMG     DEXTER                  45.02N 69.29W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            TREES AND WIRES DOWN THROUGHOUT TOWN. TIME IS ESTIMATED
            USING RADAR.

&&

JAH

Local storm report, Jul 20, 2:11 PM EDT, 2 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
211 PM EDT SAT JUL 20 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0835 PM     TSTM WND DMG     TOPSFIELD               45.42N 67.74W
07/19/2013                   WASHINGTON         ME   PUBLIC

            TREES DOWN IN TOWN. TIME IS ESTIMATED USING RADAR.

&&

JAH

Local storm report, Jul 20, 2:16 PM EDT, 2 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
216 PM EDT SAT JUL 20 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0630 PM     TSTM WND DMG     VANCEBORO               45.56N 67.43W
07/19/2013                   WASHINGTON         ME   TRAINED SPOTTER

            NUMEROUS TREES 6 TO 10 INCHES IN DIAMETER DOWN ON WALKER
            BROOK ROAD.

&&

CB

Local storm report, Jul 20, 2:36 PM EDT, 1 hour 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
236 PM EDT SAT JUL 20 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 PM     FLASH FLOOD      ORIENT                  45.82N 67.84W
07/17/2013                   AROOSTOOK          ME   TRAINED SPOTTER

            TIME ESTIMATED

&&

CB

Local storm report, Jul 20, 2:57 PM EDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CARIBOU ME
257 PM EDT SAT JUL 20 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 PM     TSTM WND DMG     GRAND LAKE MATAGAMON    46.16N 68.79W
07/19/2013                   PENOBSCOT          ME   TRAINED SPOTTER

            LARGE PINE TREES DOWN.

0335 PM     TSTM WND DMG     GRINDSTONE              45.74N 68.59W
07/19/2013                   PENOBSCOT          ME   TRAINED SPOTTER

            TREES AND POWERLINES DOWN ALONG ROUTE 11 IN GRINDSTONE

0340 PM     TSTM WND DMG     MONARDA                 45.80N 68.32W
07/19/2013                   AROOSTOOK          ME   DEPT OF HIGHWAYS

            TREES DOWN

0440 PM     TSTM WND DMG     5 N DANFORTH            45.73N 67.87W
07/19/2013                   AROOSTOOK          ME   LAW ENFORCEMENT

            TREES DOWN ALONG ROUTE 1 IN WESTON

0450 PM     TSTM WND DMG     BANCROFT                45.67N 68.03W
07/19/2013                   AROOSTOOK          ME   DEPT OF HIGHWAYS

            TREES DOWN

0450 PM     TSTM WND DMG     WYTOPITLOCK             45.64N 68.08W
07/19/2013                   AROOSTOOK          ME   DEPT OF HIGHWAYS

            TREES DOWN

0455 PM     TSTM WND DMG     SHERMAN                 45.87N 68.42W
07/19/2013                   AROOSTOOK          ME   DEPT OF HIGHWAYS

            TREES DOWN

0515 PM     TSTM WND DMG     W REED                  45.72N 68.14W
07/19/2013                   AROOSTOOK          ME   DEPT OF HIGHWAYS

            TREES DOWN REED PLANTATION

0630 PM     TSTM WND DMG     VANCEBORO               45.56N 67.43W
07/19/2013                   WASHINGTON         ME   TRAINED SPOTTER

            NUMEROUS TREES 6 TO 10 INCHES IN DIAMETER DOWN ON WALKER
            BROOK ROAD.

0700 PM     TSTM WND DMG     GREENVILLE              45.46N 69.59W
07/19/2013                   PISCATAQUIS        ME   LAW ENFORCEMENT

            *** 1 INJ *** LARGE TREE DOWN WITH 1 PERSON INJURED.

0705 PM     TSTM WND DMG     BROWNVILLE              45.31N 69.03W
07/19/2013                   PISCATAQUIS        ME   LAW ENFORCEMENT

            LARGE TREE FELL ON A CAR. TIME WAS ESTIMATED.

0729 PM     TSTM WND DMG     MEDWAY                  45.61N 68.53W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            NUMEROUS TREES DOWN

0730 PM     TSTM WND DMG     LITTLETON               46.23N 67.84W
07/19/2013                   AROOSTOOK          ME   LAW ENFORCEMENT

            LARGE TREE DOWN ON THE CARSON ROAD. TIME IS ESTIMATED.

0735 PM     TSTM WND DMG     2 W MATTAWAMKEAG        45.51N 68.40W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            TREES DOWN

0735 PM     TSTM WND DMG     PATTEN                  46.00N 68.45W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            TREES DOWN

0740 PM     TSTM WND DMG     LINCOLN                 45.36N 68.51W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            TREES DOWN

0757 PM     TSTM WND DMG     BANCROFT                45.67N 68.03W
07/19/2013                   AROOSTOOK          ME   LAW ENFORCEMENT

            TREES DOWN IN TOWN. TIME IS ESTIMATED USING RADAR.

0810 PM     TSTM WND DMG     DANFORTH                45.66N 67.87W
07/19/2013                   WASHINGTON         ME   PUBLIC

            TREES DOWN IN TOWN. TIME IS ESTIMATED USING RADAR. REPORT
            VIA FACEBOOK.

0830 PM     TSTM WND DMG     DEXTER                  45.02N 69.29W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            TREES AND WIRES DOWN THROUGHOUT TOWN. TIME IS ESTIMATED
            USING RADAR.

0835 PM     TSTM WND DMG     TOPSFIELD               45.42N 67.74W
07/19/2013                   WASHINGTON         ME   PUBLIC

            TREES DOWN IN TOWN. TIME IS ESTIMATED USING RADAR.

0850 PM     TSTM WND DMG     OLD TOWN                44.93N 68.65W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            NUMEROUS TREES DOWN. TIME ESTIMATED USING RADAR.

1010 PM     TSTM WND DMG     NEWPORT                 44.84N 69.27W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            MULTIPLE TREES DOWN

1030 PM     TSTM WND DMG     BANGOR                  44.80N 68.78W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            TREES DOWN IN TOWN. TIME IS ESTIMATED USING RADAR.

1031 PM     TSTM WND DMG     GLENBURN                44.91N 68.85W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            MULTIPLE TREES DOWN

1040 PM     TSTM WND DMG     ORONO                   44.88N 68.67W
07/19/2013                   PENOBSCOT          ME   LAW ENFORCEMENT

            MULTIPLE TREES DOWN

&&

CB

Local storm report, Jul 20, 3:54 PM EDT, 27 minutes before

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The office that day

Everything else NWS Caribou, ME issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 8:42 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	48 min
Jul 19, 10:01 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot	44 min
Jul 19, 10:43 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	47 min
Jul 20, 4:48 PM EDT	Severe Thunderstorm Warning	CAR	Washington	27 min
Jul 20, 5:21 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot	39 min
Jul 20, 5:23 PM EDT	Special Weather Statement	CAR	Aroostook	37 min
Jul 20, 6:22 PM EDT	Special Weather Statement	CAR	Aroostook	23 min

Nearby

Severe Thunderstorm Warnings in Maine, 2013 Every severe thunderstorm warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.