Alert archive / Maine / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 71, NWS Caribou, ME

August 4, 2013Aroostook County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Aug 4, 2013, 1:34 PM EDT for Aroostook County, Maine. It was in force for 26 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 4, 2013, 1:34 PM EDT (17:34 UTC)
Expired
Aug 4, 2013, 2:00 PM EDT
In force
26 min
Issued by
NWS Caribou, ME
Area
Storm-based polygon

County Aroostook County, ME

The radar

The Caribou radar (KCBW), 92 km from the middle of the area, began a volume at 17:35 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

Gray, ME (KGYX), launched 12:00Z, 5.6 hours before the alert went out and 334 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, Gray, ME at 12:00Z on 2013-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 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, Gray, ME at 12:00Z on 2013-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 square meters per square second.19395878Sfc1 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
16 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1236 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
44 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 4, 12:38 PM EDT, 56 minutes earlier.

Area forecast discussion, Aug 4, 12:38 PM EDT, 56 minutes before
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Hazardous weather outlook, Aug 4, 4:22 AM EDT, 9 hours 12 minutes before
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In the hours before

Special weather statement, Aug 4, 12:39 PM EDT, 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
1239 PM EDT SUN AUG 4 2013

MEZ002-041715-
NORTHEAST AROOSTOOK ME-
1239 PM EDT SUN AUG 4 2013

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN AROOSTOOK COUNTY UNTIL
115 PM EDT...

AT 1235 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM WOODLAND TO
MAPLETON...AND MOVING EAST AT 15 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  CARIBOU...
  PRESQUE ISLE...
  LIMESTONE...
  FORT FAIRFIELD...
  LORING...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

HASTINGS
Special weather statement, Aug 4, 1:15 PM EDT, 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
115 PM EDT SUN AUG 4 2013

MEZ002-041745-
NORTHEAST AROOSTOOK ME-
115 PM EDT SUN AUG 4 2013

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN AROOSTOOK COUNTY UNTIL
145 PM EDT...

AT 113 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM LIMESTONE TO 5 MILES
SOUTHWEST OF LIMESTONE TO EAST OF PRESQUE ISLE...AND MOVING EAST AT
15 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THESE STORMS...
ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
  FORT FAIRFIELD...
  EASTON...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

HASTINGS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 4:26 PM EDTFlash Flood WarningCARAroostook3 hr
Aug 4, 4:34 PM EDTSpecial Weather StatementCARAroostook26 min
Aug 4, 4:43 PM EDTSpecial Weather StatementCARHancock32 min
Aug 4, 4:49 PM EDTSpecial Weather StatementCARPenobscot26 min
Aug 4, 4:52 PM EDTSpecial Weather StatementCARAroostook23 min
Aug 4, 4:58 PM EDTSpecial Weather StatementCAR32 min
Aug 4, 5:05 PM EDTSpecial Weather StatementCARAroostook55 min
Aug 4, 5:20 PM EDTSpecial Weather StatementCARPenobscot40 min
Aug 4, 5:20 PM EDTSevere Thunderstorm WarningCARAroostook40 min
Aug 4, 5:23 PM EDTSpecial Weather StatementCARWashington37 min
Aug 4, 5:28 PM EDTSpecial Weather StatementCARHancock47 min
Aug 4, 5:51 PM EDTSpecial Weather StatementCARAroostook39 min
Aug 4, 5:58 PM EDTSevere Thunderstorm WarningCARAroostook47 min
Aug 4, 6:17 PM EDTAreal Flood AdvisoryCARHancock3 hr
Aug 4, 6:52 PM EDTSpecial Weather StatementCARWashington38 min

Nearby

Severe Thunderstorm Warnings in Maine, 2013Every 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.