Alert archive / Maine / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 45, NWS Caribou, ME

August 1, 2015Washington County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Aug 1, 2015, 4:57 PM EDT for Washington County, Maine. It was in force for 48 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
Aug 1, 2015, 4:57 PM EDT (20:57 UTC)
Expired
Aug 1, 2015, 5:45 PM EDT
In force
48 min
Issued by
NWS Caribou, ME
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Washington County, ME

The radar

The Caribou radar (KCBW), 120 km from the middle of the area, began a volume at 20:58 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

Caribou, ME (KCAR), launched 12:00Z, 9.0 hours before the alert went out and 213 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-pSkew-T log-p diagram, Caribou, ME at 12:00Z on 2015-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Caribou, ME at 12:00Z on 2015-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
51 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1019 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Aug 1, 4:00 PM EDT, 57 minutes earlier.

Area forecast discussion, Aug 1, 4:00 PM EDT, 57 minutes before
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Hazardous weather outlook, Aug 1, 4:00 PM EDT, 57 minutes before
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In the hours before

Special weather statement, Aug 1, 12:42 PM EDT, 4 hours 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
1242 PM EDT SAT AUG 1 2015

MEZ001-002-004>006-011715-
NORTHERN PISCATAQUIS-NORTHEAST AROOSTOOK-SOUTHEAST AROOSTOOK-NORTHERN
PENOBSCOT-NORTHWEST AROOSTOOK-
1242 PM EDT SAT AUG 1 2015

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT EAST CENTRAL
AROOSTOOK...NORTHEASTERN PISCATAQUIS AND NORTH CENTRAL PENOBSCOT
COUNTIES...

AT 1241 PM EDT...AN AREA OF STRONG THUNDERSTORMS WAS NEAR RUSSEL
CROSSING...OR 14 MILES SOUTHWEST OF PORTAGE...MOVING EAST AT 45 MPH.

WINDS IN EXCESS OF 40 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
PRESQUE ISLE...CARIBOU...FORT FAIRFIELD...LIMESTONE...PORTAGE...
MAPLETON...WASHBURN...MARS HILL...ASHLAND...EASTON...WOODLAND...
BRIDGEWATER...PORTAGE LAKE...MASARDIS...OXBOW...NASHVILLE
PLANTATION...MOOSEHORN CROSSING...LORING...RUSSEL CROSSING AND
SCOPAN.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

LAT...LON 4636 6778 4626 6902 4699 6857 4706 6779
TIME...MOT...LOC 1641Z 249DEG 40KT 4659 6866

BLOOMER
Local storm report, Aug 1, 2:50 PM EDT, 2 hours 7 minutes before
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Local storm report, Aug 1, 3:55 PM EDT, 1 hour 2 minutes before
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Local storm report, Aug 1, 4:29 PM EDT, 28 minutes before
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Local storm report, Aug 1, 4:35 PM EDT, 22 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 12:42 PM EDTSpecial Weather StatementCARAroostook33 min
Aug 1, 12:55 PM EDTSevere Thunderstorm WarningCARAroostook, Penobscot, Piscataquis50 min
Aug 1, 1:12 PM EDTSevere Thunderstorm WarningCARPiscataquis35 min
Aug 1, 1:25 PM EDTSevere Thunderstorm WarningCARAroostook, Penobscot65 min
Aug 1, 1:51 PM EDTSevere Thunderstorm WarningCARAroostook, Penobscot, Piscataquis39 min
Aug 1, 2:06 PM EDTSevere Thunderstorm WarningCARPenobscot, Piscataquis54 min
Aug 1, 2:24 PM EDTSevere Thunderstorm WarningCARAroostook51 min
Aug 1, 2:34 PM EDTSevere Thunderstorm WarningCARAroostook, Penobscot, Washington41 min
Aug 1, 3:01 PM EDTSevere Thunderstorm WarningCARAroostook, Hancock, Penobscot, Piscataquis, Washington59 min
Aug 1, 3:58 PM EDTSevere Thunderstorm WarningCARPenobscot, Washington47 min
Aug 1, 4:36 PM EDTSevere Thunderstorm WarningCARHancock39 min
Aug 1, 4:55 PM EDTSpecial Marine WarningCAR65 min
Aug 1, 5:16 PM EDTSevere Thunderstorm WarningCARHancock, Washington44 min
Aug 1, 5:50 PM EDTSpecial Marine WarningCAR55 min

Nearby

Severe Thunderstorm Warnings in Maine, 2015Every severe thunderstorm warning in 2015

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.