Alert archive / Maine / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 24, NWS Caribou, ME

July 16, 2021Hancock County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jul 16, 2021, 2:23 PM EDT for Hancock County, Maine. It was in force for 67 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: Jul 16, 2021, 2:23 PM EDT (18:23 UTC)
Expired: Jul 16, 2021, 3:30 PM EDT
In force: 67 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Hancock County, ME

The radar

The Portland,ME radar (KGYX), 148 km from the middle of the area, began a volume at 18:26 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
Jul 16, 2:58 PM EDT	TSTM WND DMG	Surry, ME	TREE SNAPPED AND FELL ONTO WIRES. SMALL FIRE. TIME ESTIMATED BY RADAR.

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, 6.4 hours before the alert went out and 149 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: 153 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 1157 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

675 
WUUS51 KCAR 161823
SVRCAR
MEC009-161930-
/O.NEW.KCAR.SV.W.0024.210716T1823Z-210716T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Caribou ME
223 PM EDT Fri Jul 16 2021

The National Weather Service in Caribou Maine has issued a

* Severe Thunderstorm Warning for...
  Southern Hancock County in southeastern Maine...

* Until 330 PM EDT.

* At 223 PM EDT, a severe thunderstorm was located near Searsport,
  moving east at 50 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...
  Ellsworth, Bar Harbor, Bucksport, Blue Hill, Dedham, Castine,
  Steuben, Verona Island, Penobscot Township, Hancock, Franklin,
  Orland, Gouldsboro, Lamoine, Tremont, Trenton, Surry, Penobscot,
  Sullivan and Sedgwick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4431 6870 4434 6875 4432 6877 4433 6882
      4437 6879 4436 6876 4443 6876 4438 6881
      4440 6881 4440 6882 4450 6877 4465 6883
      4471 6805 4436 6792 4435 6798 4429 6802
      4432 6813 4428 6816 4421 6817
TIME...MOT...LOC 1823Z 272DEG 45KT 4451 6892 

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

AStrauser

4 follow-up statements

842 
WWUS51 KCAR 161840
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
240 PM EDT Fri Jul 16 2021

MEC009-161930-
/O.CON.KCAR.SV.W.0024.000000T0000Z-210716T1930Z/
Hancock ME-
240 PM EDT Fri Jul 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHERN HANCOCK COUNTY...

At 240 PM EDT, a severe thunderstorm was located near Penobscot
Township, or near Blue Hill, moving east at 50 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...
Ellsworth, Bar Harbor, Bucksport, Blue Hill, Dedham, Castine,
Steuben, Verona Island, Penobscot Township, Hancock, Franklin,
Orland, Gouldsboro, Lamoine, Tremont, Trenton, Surry, Penobscot,
Sullivan and Sedgwick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4431 6870 4434 6874 4434 6877 4443 6876
      4440 6880 4440 6879 4438 6881 4450 6877
      4456 6878 4456 6876 4463 6879 4471 6805
      4447 6798 4436 6792 4435 6798 4429 6802
      4432 6813 4428 6816 4421 6817
TIME...MOT...LOC 1840Z 272DEG 45KT 4450 6861 

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

AStrauser

940 
WWUS51 KCAR 161901
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
301 PM EDT Fri Jul 16 2021

MEC009-161930-
/O.CON.KCAR.SV.W.0024.000000T0000Z-210716T1930Z/
Hancock ME-
301 PM EDT Fri Jul 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHERN HANCOCK COUNTY...

At 300 PM EDT, a severe thunderstorm was located near Ellsworth,
moving east at 40 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vehicles is possible. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Ellsworth, Bar Harbor, Blue Hill, Steuben, Penobscot Township,
Hancock, Franklin, Orland, Gouldsboro, Lamoine, Trenton, Surry,
Sullivan, Sedgwick, Brooksville, Brooklin, Winter Harbor, Mariaville,
Eastbrook and Waltham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4429 6848 4428 6848 4434 6869 4439 6869
      4435 6868 4436 6868 4437 6866 4440 6868
      4445 6868 4453 6863 4461 6865 4471 6805
      4447 6798 4436 6792 4435 6798 4429 6802
      4432 6813 4423 6820
TIME...MOT...LOC 1900Z 272DEG 34KT 4449 6838 

HAIL...1.00IN
WIND...70MPH
 
$$

AStrauser

836 
WWUS51 KCAR 161918
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
318 PM EDT Fri Jul 16 2021

MEC009-161930-
/O.CON.KCAR.SV.W.0024.000000T0000Z-210716T1930Z/
Hancock ME-
318 PM EDT Fri Jul 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHEASTERN HANCOCK COUNTY...

At 317 PM EDT, a severe thunderstorm was located near Bar Harbor,
moving east at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vehicles is possible. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Ellsworth, Bar Harbor, Steuben, Hancock, Franklin, Gouldsboro,
Lamoine, Trenton, Surry, Sullivan, Winter Harbor, Sorrento, Cranberry
Isles and Somesville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4423 6823 4432 6845 4432 6846 4433 6847
      4434 6851 4458 6845 4464 6803 4447 6798
      4436 6792 4435 6798 4429 6802 4432 6813
      4423 6820
TIME...MOT...LOC 1917Z 271DEG 32KT 4448 6818 

HAIL...1.00IN
WIND...70MPH
 
$$

AStrauser

456 
WWUS51 KCAR 161934
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
334 PM EDT Fri Jul 16 2021

MEC009-161943-
/O.EXP.KCAR.SV.W.0024.000000T0000Z-210716T1930Z/
Hancock ME-
334 PM EDT Fri Jul 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HANCOCK COUNTY
HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, but frequent cloud to ground lightning and heavy downpours
are still likely. Therefore, the warning has been allowed to expire.
Gusty winds are still possible with this thunderstorm.

LAT...LON 4423 6823 4432 6845 4432 6846 4433 6847
      4434 6851 4458 6845 4464 6803 4447 6798
      4436 6792 4435 6798 4429 6802 4432 6813
      4423 6820
TIME...MOT...LOC 1933Z 272DEG 45KT 4447 6793 

$$

AStrauser

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 8:50 PM EDT	Dense Fog Advisory	CAR	Hancock, Penobscot, Washington	12 hr
Jul 16, 12:21 PM EDT	Special Weather Statement	CAR	Waldo	54 min
Jul 16, 1:08 PM EDT	Special Weather Statement	CAR	Hancock	52 min
Jul 16, 1:45 PM EDT	Special Weather Statement	CAR	Hancock, Washington	60 min
Jul 16, 2:55 PM EDT	Special Marine Warning	CAR		55 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.