Alert archive / Maine / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Caribou, ME

June 30, 2021Aroostook County, Washington County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jun 30, 2021, 5:31 PM EDT for Aroostook County, Washington County, Maine. It was in force for 29 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: Jun 30, 2021, 5:31 PM EDT (21:31 UTC)
Expired: Jun 30, 2021, 6:00 PM EDT
In force: 29 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Aroostook County, ME, Washington County, ME

The radar

The Caribou radar (KCBW), 43 km from the middle of the area, began a volume at 21:35 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 30, 12:06 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Caribou, ME (KCAR), launched 12:00Z, 9.5 hours before the alert went out and 133 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: 8 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 517 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 430 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

041 
WUUS51 KCAR 302131
SVRCAR
MEC003-029-302215-
/O.NEW.KCAR.SV.W.0023.210630T2131Z-210630T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Caribou ME
531 PM EDT Wed Jun 30 2021

The National Weather Service in Caribou Maine has issued a

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

* Until 615 PM EDT.

* At 530 PM EDT, a severe thunderstorm was located 9 miles southeast
  of Sherman, or 18 miles south of Patten, 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...
  Danforth, Haynesville, Wytopitlock, Reed Plantation, Weston, Reed,
  Macwahoc, Bancroft, Glenwood, Silver Ridge, Benedicta, Eaton,
  Monarda and Brookton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4551 6786 4557 6803 4564 6805 4562 6816
      4572 6843 4578 6843 4585 6839 4573 6779
      4572 6780 4570 6780 4569 6782 4568 6780
      4568 6777 4567 6776
TIME...MOT...LOC 2130Z 290DEG 31KT 4575 6834 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

MStrauser

2 follow-up statements

357 
WWUS51 KCAR 302147
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
547 PM EDT Wed Jun 30 2021

MEC003-029-302215-
/O.CON.KCAR.SV.W.0023.000000T0000Z-210630T2215Z/
Washington ME-Aroostook ME-
547 PM EDT Wed Jun 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN WASHINGTON AND SOUTHEASTERN AROOSTOOK COUNTIES...

At 546 PM EDT, a severe thunderstorm was located near Reed
Plantation, or 14 miles west of Danforth, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to trees and power lines.

Locations impacted include...
Danforth, Haynesville, Wytopitlock, Reed Plantation, Weston, Reed,
Macwahoc, Bancroft, Glenwood, Eaton and Brookton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4570 6836 4581 6822 4577 6800 4573 6779
      4572 6780 4570 6780 4569 6782 4568 6780
      4568 6777 4567 6776 4551 6786 4557 6803
      4564 6805 4562 6816
TIME...MOT...LOC 2146Z 290DEG 29KT 4570 6817 

HAIL...<.75IN
WIND...60MPH
 
$$

MStrauser

835 
WWUS51 KCAR 302200
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
600 PM EDT Wed Jun 30 2021

MEC003-029-302205-
/O.CAN.KCAR.SV.W.0023.000000T0000Z-210630T2215Z/
Washington ME-Aroostook ME-
600 PM EDT Wed Jun 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WASHINGTON AND
SOUTHEASTERN AROOSTOOK COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe 
limits. Therefore, the warning has been cancelled. Gusty winds are 
still possible with this thunderstorm.

LAT...LON 4570 6836 4581 6822 4577 6800 4573 6779
      4572 6780 4570 6780 4569 6782 4568 6780
      4568 6777 4567 6776 4551 6786 4557 6803
      4564 6805 4562 6816
TIME...MOT...LOC 2153Z 290DEG 31KT 4567 6806 

$$

MStrauser

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 8:04 AM EDT	Special Weather Statement	CAR	Piscataquis	26 min
Jun 30, 8:26 AM EDT	Special Weather Statement	CAR		34 min
Jun 30, 9:21 AM EDT	Special Weather Statement	CAR	Penobscot	39 min
Jun 30, 9:53 AM EDT	Severe Thunderstorm Warning	CAR	Washington	52 min
Jun 30, 1:35 PM EDT	Special Marine Warning	CAR		43 min
Jun 30, 2:25 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot	65 min
Jun 30, 3:10 PM EDT	Severe Thunderstorm Warning	CAR	Hancock	50 min
Jun 30, 4:53 PM EDT	Severe Thunderstorm Warning	CAR	Hancock	52 min
Jun 30, 5:03 PM EDT	Special Marine Warning	CAR		57 min
Jun 30, 7:49 PM EDT	Special Weather Statement	CAR	Aroostook	41 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.