Alert archive / Maine / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 21, NWS Caribou, ME

July 9, 2020Penobscot County, Piscataquis County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jul 9, 2020, 6:05 PM EDT for Penobscot County, Piscataquis County, Maine. It was in force for 55 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: Jul 9, 2020, 6:05 PM EDT (22:05 UTC)
Expired: Jul 9, 2020, 7:00 PM EDT
In force: 55 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), 91 km from the middle of the area, began a volume at 22:05 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

Caribou, ME (KCAR), launched 12:00Z, 10.1 hours before the alert went out and 80 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: 401 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 760 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

245 
WUUS51 KCAR 092205
SVRCAR
MEC019-021-092300-
/O.NEW.KCAR.SV.W.0021.200709T2205Z-200709T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Caribou ME
605 PM EDT Thu Jul 9 2020

The National Weather Service in Caribou Maine has issued a

* Severe Thunderstorm Warning for...
  Northeastern Piscataquis County in north central Maine...
  North central Penobscot County in east central Maine...

* Until 700 PM EDT.

* At 605 PM EDT, a severe thunderstorm was located 13 miles east of
  Churchill Dam, or 26 miles east of Clayton Lake, moving southeast
  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...
  Moosehorn Crossing and Baxter State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4657 6896 4657 6893 4650 6882 4639 6882
      4639 6870 4638 6869 4638 6864 4636 6860
      4616 6895 4649 6916
TIME...MOT...LOC 2205Z 328DEG 11KT 4648 6900 

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

Bloomer

2 follow-up statements

916 
WWUS51 KCAR 092225
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
625 PM EDT Thu Jul 9 2020

MEC019-021-092300-
/O.CON.KCAR.SV.W.0021.000000T0000Z-200709T2300Z/
Piscataquis ME-Penobscot ME-
625 PM EDT Thu Jul 9 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHEASTERN PISCATAQUIS AND NORTH CENTRAL PENOBSCOT COUNTIES...

At 625 PM EDT, a severe thunderstorm was located 10 miles northwest
of Moosehorn Crossing, or 29 miles southeast of Clayton Lake, moving
southeast 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...
Moosehorn Crossing and Baxter State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4651 6889 4650 6885 4650 6882 4639 6882
      4639 6870 4638 6869 4638 6864 4636 6860
      4616 6895 4642 6907
TIME...MOT...LOC 2225Z 328DEG 11KT 4643 6895 

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

Bloomer

054 
WWUS51 KCAR 092255
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
655 PM EDT Thu Jul 9 2020

MEC019-021-092305-
/O.EXP.KCAR.SV.W.0021.000000T0000Z-200709T2300Z/
Piscataquis ME-Penobscot ME-
655 PM EDT Thu Jul 9 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PISCATAQUIS AND
NORTH CENTRAL PENOBSCOT COUNTIES WILL EXPIRE AT 700 PM EDT...
    
The severe thunderstorm which prompted the warning has weakened and 
moved out of the warned area. Therefore, the warning will be allowed 
to expire.

LAT...LON 4651 6889 4650 6885 4650 6882 4639 6882
      4639 6870 4638 6869 4638 6864 4636 6860
      4616 6895 4642 6907
TIME...MOT...LOC 2255Z 328DEG 11KT 4636 6889 

$$

Bloomer

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 5:20 AM EDT	Dense Fog Advisory	CAR	Hancock, Penobscot, Washington	4 hr
Jul 9, 12:56 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	49 min
Jul 9, 1:20 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	55 min
Jul 9, 2:12 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	63 min
Jul 9, 3:51 PM EDT	Areal Flood Advisory	CAR	Aroostook	98 min
Jul 9, 5:42 PM EDT	Special Weather Statement	CAR	Aroostook	63 min
Jul 9, 5:46 PM EDT	Special Weather Statement	CAR	Aroostook	44 min
Jul 9, 6:24 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	50 min

Nearby

Severe Thunderstorm Warnings in Maine, 2020 Every severe thunderstorm warning in 2020

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.