Alert archive / Maine / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS Caribou, ME

May 16, 2021Hancock County, Penobscot County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at May 16, 2021, 4:42 PM EDT for Hancock County, Penobscot County, Maine. It was in force for 36 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: May 16, 2021, 4:42 PM EDT (20:42 UTC)
Expired: May 16, 2021, 5:18 PM EDT
In force: 36 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hancock County, ME, Penobscot County, ME

The radar

The Portland,ME radar (KGYX), 142 km from the middle of the area, began a volume at 20:45 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
May 16, 4:45 PM EDT	HAIL 1	3 E Orland, ME	TIME ESTIMATED AT 445 PM EDT BASED ON REPORT AND RADAR SIGNATURE LOCATION.

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, 8.7 hours before the alert went out and 142 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: 2 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 2443 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

682 
WUUS51 KCAR 162042
SVRCAR
MEC009-019-162130-
/O.NEW.KCAR.SV.W.0001.210516T2042Z-210516T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Caribou ME
442 PM EDT Sun May 16 2021

The National Weather Service in Caribou Maine has issued a

* Severe Thunderstorm Warning for...
  West central Hancock County in southeastern Maine...
  South central Penobscot County in east central Maine...

* Until 530 PM EDT.

* At 441 PM EDT, a severe thunderstorm was located near Penobscot
  Township, or 9 miles east of Bucksport, and is nearly stationary.

  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...
  Ellsworth, Bucksport, Blue Hill, Brewer, Hampden, Dedham, Verona
  Island, Penobscot Township, Orrington, Holden, Orland, Eddington,
  Surry, Penobscot, Clifton, Otis and Verona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4442 6871 4444 6872 4446 6871 4447 6874
      4445 6873 4455 6881 4457 6879 4457 6881
      4461 6882 4463 6884 4467 6881 4468 6881
      4470 6884 4469 6891 4471 6892 4482 6857
      4452 6834
TIME...MOT...LOC 2041Z 156DEG 3KT 4455 6861 

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

Duda

2 follow-up statements

093 
WWUS51 KCAR 162109
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
509 PM EDT Sun May 16 2021

MEC009-019-162130-
/O.CON.KCAR.SV.W.0001.000000T0000Z-210516T2130Z/
Hancock ME-Penobscot ME-
509 PM EDT Sun May 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR WEST CENTRAL HANCOCK AND SOUTH CENTRAL PENOBSCOT COUNTIES...

At 507 PM EDT, a severe thunderstorm was located 7 miles northeast of
Penobscot Township, or 8 miles east of Bucksport, and is nearly
stationary.

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

SOURCE...Public report of 1 inch hail near Toddy Pond. 

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

Locations impacted include...
Ellsworth, Bucksport, Blue Hill, Brewer, Hampden, Dedham, Verona
Island, Penobscot Township, Orrington, Holden, Orland, Eddington,
Surry, Penobscot, Clifton, Otis and Verona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4442 6871 4444 6872 4446 6871 4447 6874
      4445 6873 4455 6881 4457 6879 4457 6881
      4461 6882 4463 6884 4467 6881 4468 6881
      4470 6884 4469 6891 4471 6892 4482 6857
      4452 6834
TIME...MOT...LOC 2107Z 156DEG 3KT 4457 6862 

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

Duda

657 
WWUS51 KCAR 162118
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
518 PM EDT Sun May 16 2021

MEC009-019-162127-
/O.CAN.KCAR.SV.W.0001.000000T0000Z-210516T2130Z/
Hancock ME-Penobscot ME-
518 PM EDT Sun May 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL HANCOCK AND SOUTH
CENTRAL PENOBSCOT COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 4442 6871 4444 6872 4446 6871 4447 6874
      4445 6873 4455 6881 4457 6879 4457 6881
      4461 6882 4463 6884 4467 6881 4468 6881
      4470 6884 4469 6891 4471 6892 4482 6857
      4452 6834
TIME...MOT...LOC 2113Z 156DEG 3KT 4458 6863 

$$

Duda

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 1:04 PM EDT	Special Weather Statement	CAR	Hancock	26 min
May 16, 1:46 PM EDT	Special Weather Statement	CAR	Aroostook	29 min
May 16, 2:33 PM EDT	Special Weather Statement	CAR	Aroostook	27 min
May 16, 3:25 PM EDT	Special Weather Statement	CAR	Penobscot	35 min
May 16, 3:59 PM EDT	Special Weather Statement	CAR	Aroostook	31 min
May 16, 4:38 PM EDT	Special Weather Statement	CAR	Hancock	37 min
May 16, 5:42 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Washington	48 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.