Alert archive / Maine / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 29, NWS Caribou, ME

September 6, 2021Aroostook County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Sep 6, 2021, 6:51 PM EDT for Aroostook County, Maine. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 6, 2021, 6:51 PM EDT (22:51 UTC)
Expired: Sep 6, 2021, 7:30 PM EDT
In force: 39 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Aroostook County, ME

The radar

The Caribou radar (KCBW), 12 km from the middle of the area, began a volume at 22:52 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.

What was reported inside it

Time	Report	Where	Remark
Sep 6, 7:10 PM EDT	HAIL 0.25	Houlton, ME	RECEIVED VIA FACEBOOK.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Caribou, ME (KCAR), launched 12:00Z, 10.9 hours before the alert went out and 104 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: 62 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 468 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

170 
WUUS51 KCAR 062251
SVRCAR
MEC003-062330-
/O.NEW.KCAR.SV.W.0029.210906T2251Z-210906T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Caribou ME
651 PM EDT Mon Sep 6 2021

The National Weather Service in Caribou Maine has issued a

* Severe Thunderstorm Warning for...
  Southeastern Aroostook County in northern Maine...

* Until 730 PM EDT.

* At 651 PM EDT, a severe thunderstorm was located 9 miles east of
  Island Falls, or 16 miles southwest of Houlton, moving east at 35
  mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and power lines.

* Locations impacted include...
  Houlton, Hodgdon, Island Falls, Amity, Cary Plantation, Linneus,
  Oakfield, New Limerick, Cary, Forkstown and North Amity.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4589 6779 4589 6780 4586 6815 4603 6820
      4615 6778 4594 6778 4593 6777 4590 6777
TIME...MOT...LOC 2251Z 250DEG 29KT 4597 6809 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Bloomer

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 3:08 PM EDT	Special Weather Statement	CAR	Piscataquis	67 min
Sep 6, 3:14 PM EDT	Special Weather Statement	CAR	Aroostook	61 min
Sep 6, 3:29 PM EDT	Special Weather Statement	CAR		61 min
Sep 6, 4:00 PM EDT	Special Weather Statement	CAR		60 min
Sep 6, 4:12 PM EDT	Special Weather Statement	CAR	Aroostook	63 min
Sep 6, 4:29 PM EDT	Special Weather Statement	CAR	Piscataquis	46 min
Sep 6, 5:03 PM EDT	Special Weather Statement	CAR	Penobscot	57 min
Sep 6, 5:10 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	50 min
Sep 6, 5:20 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	40 min
Sep 6, 5:23 PM EDT	Special Weather Statement	CAR	Aroostook	52 min
Sep 6, 6:04 PM EDT	Special Weather Statement	CAR		56 min
Sep 6, 6:21 PM EDT	Flash Flood Warning	CAR	Aroostook	100 min
Sep 6, 6:40 PM EDT	Areal Flood Advisory	CAR	Aroostook	59 min

Nearby

Severe Thunderstorm Warnings in Maine, 2021 Every severe thunderstorm warning in 2021

Sources

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