Alert archive / Maine / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Caribou, ME

September 6, 2021Penobscot County, Piscataquis County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Sep 6, 2021, 5:20 PM EDT for Penobscot County, Piscataquis County, Maine. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 6, 2021, 5:20 PM EDT (21:20 UTC)
Expired: Sep 6, 2021, 6:00 PM EDT
In force: 40 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), 131 km from the middle of the area, began a volume at 21:23 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

Gray, ME (KGYX), launched 12:00Z, 9.3 hours before the alert went out and 177 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: 10 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

875 
WUUS51 KCAR 062120
SVRCAR
MEC019-021-062200-
/O.NEW.KCAR.SV.W.0028.210906T2120Z-210906T2200Z/

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

The National Weather Service in Caribou Maine has issued a

* Severe Thunderstorm Warning for...
  Southeastern Piscataquis County in north central Maine...
  West central Penobscot County in east central Maine...

* Until 600 PM EDT.

* At 520 PM EDT, a severe thunderstorm was located near Orneville, or
  8 miles east of Dover-Foxcroft, moving east at 15 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...
  Dover-Foxcroft, Howland, Milo, Orneville, Lake View Plantation,
  Enfield, Charleston, Bradford, Garland, Lagrange, Sebec,
  Passadumkeag, Atkinson, Argyle, Medford, Maxfield, Seboeis and Boyd
  Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4505 6910 4520 6917 4538 6870 4514 6857
TIME...MOT...LOC 2120Z 252DEG 13KT 4515 6906 

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, 5:23 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
Sep 6, 6:51 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	39 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.