Alert archive / Maine / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 25, NWS Caribou, ME

August 7, 2018Penobscot County, Piscataquis County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Aug 7, 2018, 1:24 PM EDT for Penobscot County, Piscataquis County, Maine. It was in force for 36 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 7, 2018, 1:24 PM EDT (17:24 UTC)
Expired: Aug 7, 2018, 2:00 PM EDT
In force: 36 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Penobscot County, ME, Piscataquis County, ME

The radar

The Caribou radar (KCBW), 101 km from the middle of the area, began a volume at 17:23 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, 5.4 hours before the alert went out and 158 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: 733 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 901 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.5

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 7, 10:38 AM EDT, 2 hours 46 minutes earlier.

Area forecast discussion, Aug 7, 10:38 AM EDT, 2 hours 46 minutes before

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Hazardous weather outlook, Aug 7, 12:43 PM EDT, 41 minutes before

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In the hours before

Local storm report, Aug 7, 8:54 AM EDT, 4 hours 30 minutes before

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Local storm report, Aug 7, 9:24 AM EDT, 4 hours before

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Local storm report, Aug 7, 11:58 AM EDT, 1 hour 26 minutes before

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Special weather statement, Aug 7, 12:40 PM EDT, 44 minutes before

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Special weather statement, Aug 7, 1:03 PM EDT, 21 minutes before

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Special weather statement, Aug 7, 1:21 PM EDT, 3 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
Aug 7, 3:26 AM EDT	Heat Advisory	CAR	Hancock, Penobscot, Piscataquis, Washington	15 hr
Aug 7, 5:39 AM EDT	Special Weather Statement	CAR		51 min
Aug 7, 6:06 AM EDT	Severe Thunderstorm Warning	CAR	Aroostook	39 min
Aug 7, 6:43 AM EDT	Severe Thunderstorm Warning	CAR	Aroostook	47 min
Aug 7, 7:27 AM EDT	Severe Thunderstorm Warning	CAR	Aroostook	48 min
Aug 7, 8:07 AM EDT	Severe Thunderstorm Warning	CAR	Aroostook	23 min
Aug 7, 12:34 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	41 min
Aug 7, 1:03 PM EDT	Special Weather Statement	CAR	Penobscot	27 min
Aug 7, 1:21 PM EDT	Special Weather Statement	CAR	Penobscot	24 min
Aug 7, 1:41 PM EDT	Special Weather Statement	CAR	Penobscot	34 min
Aug 7, 1:50 PM EDT	Special Weather Statement	CAR		40 min
Aug 7, 2:00 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	30 min
Aug 7, 4:22 PM EDT	Special Weather Statement	CAR		23 min
Aug 7, 5:21 PM EDT	Special Weather Statement	CAR	Waldo	24 min
Aug 7, 5:45 PM EDT	Special Weather Statement	CAR	Hancock	30 min
Aug 7, 6:23 PM EDT	Special Weather Statement	CAR	Washington	22 min
Aug 7, 7:21 PM EDT	Special Weather Statement	CAR	Waldo	39 min
Aug 7, 7:47 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot	28 min

Nearby

Severe Thunderstorm Warnings in Maine, 2018 Every severe thunderstorm warning in 2018

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.