Alert archive / Maine / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Caribou, ME

August 7, 2018Aroostook County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Aug 7, 2018, 6:43 AM EDT for Aroostook County, Maine. It was in force for 47 min. 3 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
Aug 7, 2018, 6:43 AM EDT (10:43 UTC)
Expired
Aug 7, 2018, 7:30 AM EDT
In force
47 min
Issued by
NWS Caribou, ME
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

County Aroostook County, ME

The radar

The Caribou radar (KCBW), 146 km from the middle of the area, began a volume at 10:46 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

TimeReportWhereRemark
Aug 7, 6:45 AM EDTTSTM WND DMG1 Nw Allagash, METWO TREES DOWN IN TOWN.
Aug 7, 6:45 AM EDTTSTM WND DMGAllagash, METREE DOWN IN TOWN.
Aug 7, 7:30 AM EDTHAIL 0.884 Sw Stockholm, ME

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

The nearest sounding before it

Caribou, ME (KCAR), launched 00:00Z, 10.7 hours before the alert went out and 61 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-pSkew-T log-p diagram, Caribou, ME at 00:00Z on 2018-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 484 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Caribou, ME at 00:00Z on 2018-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
484 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1577 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

350 
WUUS51 KCAR 071043
SVRCAR
MEC003-071130-
/O.NEW.KCAR.SV.W.0021.180807T1043Z-180807T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Caribou ME
643 AM EDT TUE AUG 7 2018

The National Weather Service in Caribou Maine has issued a

* Severe Thunderstorm Warning for...
  Northeastern Aroostook County in northern Maine...

* Until 730 AM EDT.

* At 643 AM EDT, a severe thunderstorm was located near Allagash,
  moving east at 45 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...
  Fort Kent, Madawaska, Eagle Lake, Allagash, Deboullie Mountain,
  Washburn, Woodland, Frenchville, New Canada, Allagash Township,
  Cross Lake, Madawaska Lake, Dickey, New Sweden, Wallagrass, Grand
  Isle, Perham, Wade, Stockholm and Winterville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4736 6823 4733 6816 4729 6813 4683 6810
      4686 6915 4729 6908 4729 6905 4726 6905
      4724 6903 4718 6890 4724 6872 4724 6861
      4729 6858 4730 6847 4728 6846 4729 6838
      4734 6838 4736 6835
TIME...MOT...LOC 1043Z 269DEG 59KT 4706 6896 

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

Nouhan
2 follow-up statements
080 
WWUS51 KCAR 071106
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
706 AM EDT TUE AUG 7 2018

MEC003-071130-
/O.CON.KCAR.SV.W.0021.000000T0000Z-180807T1130Z/
Aroostook ME-
706 AM EDT TUE AUG 7 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 AM EDT
FOR NORTHEASTERN AROOSTOOK COUNTY...

At 706 AM EDT, a severe thunderstorm was located near New Canada, or
7 miles south of Fort Kent, moving east at 55 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...
Fort Kent, Madawaska, Eagle Lake, Allagash, Deboullie Mountain,
Washburn, Woodland, Frenchville, New Canada, Allagash Township, Cross
Lake, Madawaska Lake, Dickey, New Sweden, Wallagrass, Grand Isle,
Perham, Wade, Stockholm and Winterville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4736 6823 4733 6816 4729 6813 4683 6810
      4686 6915 4729 6908 4729 6905 4726 6905
      4724 6903 4718 6890 4724 6872 4724 6861
      4729 6858 4730 6847 4728 6846 4729 6838
      4734 6838 4736 6835
TIME...MOT...LOC 1106Z 252DEG 48KT 4715 6857 

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

Foisy
377 
WWUS51 KCAR 071129
SVSCAR

Severe Weather Statement
National Weather Service Caribou ME
729 AM EDT TUE AUG 7 2018

MEC003-071138-
/O.EXP.KCAR.SV.W.0021.000000T0000Z-180807T1130Z/
Aroostook ME-
729 AM EDT TUE AUG 7 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN AROOSTOOK COUNTY
WILL EXPIRE AT 730 AM EDT...
    
The severe thunderstorm warning will expire at 730 AM and been 
replaced by a new severe thunderstorm warning until 815 AM.

LAT...LON 4736 6823 4733 6816 4729 6813 4683 6810
      4686 6915 4729 6908 4729 6905 4726 6905
      4724 6903 4718 6890 4724 6872 4724 6861
      4729 6858 4730 6847 4728 6846 4729 6838
      4734 6838 4736 6835
TIME...MOT...LOC 1128Z 269DEG 59KT 4716 6839 

$$

Foisy

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 3:26 AM EDTHeat AdvisoryCARHancock, Penobscot, Piscataquis, Washington15 hr
Aug 7, 5:39 AM EDTSpecial Weather StatementCAR51 min
Aug 7, 6:06 AM EDTSevere Thunderstorm WarningCARAroostook39 min
Aug 7, 7:27 AM EDTSevere Thunderstorm WarningCARAroostook48 min
Aug 7, 8:07 AM EDTSevere Thunderstorm WarningCARAroostook23 min
Aug 7, 12:34 PM EDTSevere Thunderstorm WarningCARAroostook41 min
Aug 7, 1:03 PM EDTSpecial Weather StatementCARPenobscot27 min
Aug 7, 1:21 PM EDTSpecial Weather StatementCARPenobscot24 min
Aug 7, 1:24 PM EDTSevere Thunderstorm WarningCARPenobscot, Piscataquis36 min
Aug 7, 1:41 PM EDTSpecial Weather StatementCARPenobscot34 min
Aug 7, 1:50 PM EDTSpecial Weather StatementCAR40 min
Aug 7, 2:00 PM EDTSevere Thunderstorm WarningCARAroostook30 min
Aug 7, 4:22 PM EDTSpecial Weather StatementCAR23 min
Aug 7, 5:21 PM EDTSpecial Weather StatementCARWaldo24 min
Aug 7, 5:45 PM EDTSpecial Weather StatementCARHancock30 min
Aug 7, 6:23 PM EDTSpecial Weather StatementCARWashington22 min
Aug 7, 7:21 PM EDTSpecial Weather StatementCARWaldo39 min
Aug 7, 7:47 PM EDTSevere Thunderstorm WarningCARHancock, Penobscot28 min

Nearby

Severe Thunderstorm Warnings in Maine, 2018Every severe thunderstorm warning in 2018

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.