Alert archive / Maine / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 27, NWS Caribou, ME

September 6, 2021Penobscot County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Sep 6, 2021, 5:10 PM EDT for Penobscot County, Maine. It was in force for 50 min. 2 reports 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, 5:10 PM EDT (21:10 UTC)
Expired: Sep 6, 2021, 6:00 PM EDT
In force: 50 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Penobscot County, ME

The radar

The Portland,ME radar (KGYX), 135 km from the middle of the area, began a volume at 21:10 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, 5:18 PM EDT	TSTM WND DMG	Dixmont, ME	TREES AND POWER LINES DOWN. REPORT FROM PENOBSCOT COUNTY RCC. TIME ESTIMATED BASED ON RADAR.
Sep 6, 5:20 PM EDT	HAIL 0.7	3 Nnw Dixmont, ME	DIME SIZED HAIL ALONG WITH SOME SMALL TREE BRANCHES DOWN.

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

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 9.2 hours before the alert went out and 135 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.

211 
WUUS51 KCAR 062110
SVRCAR
MEC019-062200-
/O.NEW.KCAR.SV.W.0027.210906T2110Z-210906T2200Z/

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

The National Weather Service in Caribou Maine has issued a

* Severe Thunderstorm Warning for...
  Southwestern Penobscot County in east central Maine...

* Until 600 PM EDT.

* At 510 PM EDT, a severe thunderstorm was located near Unity, or
  near Thorndike, moving east at 25 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...
  Hampden, Hermon, Kenduskeag, Glenburn, Orrington, Levant, Carmel,
  Newburgh, Plymouth, Etna and Dixmont.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4472 6920 4473 6922 4472 6926 4475 6927
      4490 6889 4469 6879 4468 6881 4469 6883
      4470 6884 4470 6885 4469 6888 4469 6893
      4464 6918
TIME...MOT...LOC 2110Z 247DEG 22KT 4466 6930 

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, 5:20 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
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.