Alert archive / Maine / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 11, NWS Caribou, ME

July 2, 2020Penobscot County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jul 2, 2020, 5:52 PM EDT for Penobscot County, Maine. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 2, 2020, 5:52 PM EDT (21:52 UTC)
Expired: Jul 2, 2020, 6:30 PM EDT
In force: 38 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Penobscot County, ME

The radar

The Caribou radar (KCBW), 97 km from the middle of the area, began a volume at 21:50 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, 9.9 hours before the alert went out and 171 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: 19 J/kg
Mixed-layer CIN: -243 J/kg
Mixed-layer LCL: 1689 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Caribou, ME wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 2, 4:57 PM EDT, 55 minutes earlier.

Area forecast discussion, Jul 2, 4:57 PM EDT, 55 minutes before

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Hazardous weather outlook, Jul 2, 3:55 PM EDT, 1 hour 57 minutes before

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In the hours before

Special weather statement, Jul 2, 1:47 PM EDT, 4 hours 5 minutes before

Special Weather Statement
National Weather Service Caribou ME
147 PM EDT Thu Jul 2 2020

MEZ003-004-021845-
Northern Piscataquis-Northern Somerset-
147 PM EDT Thu Jul 2 2020

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN SOMERSET AND
NORTHWESTERN PISCATAQUIS COUNTIES...

At 146 PM EDT, a strong thunderstorm was located near Baker Lake, or
20 miles southeast of Saint Juste, moving southeast at 30 mph.

Half inch hail is possible with this storm.

Locations impacted include...
Chesuncook, Baker Lake, Caucomgomoc Lake and Lobster Township.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4625 7000 4641 6987 4619 6920 4586 6942
TIME...MOT...LOC 1746Z 297DEG 24KT 4630 6984

Bloomer

Special weather statement, Jul 2, 2:34 PM EDT, 3 hours 18 minutes before

Special Weather Statement
National Weather Service Caribou ME
234 PM EDT Thu Jul 2 2020

MEZ006-021930-
Southeast Aroostook-
234 PM EDT Thu Jul 2 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN AROOSTOOK COUNTY...

At 233 PM EDT, a strong thunderstorm was located near Houlton, moving
southeast at 20 mph.

Wind gusts up to 50 mph and half inch hail are possible with this
storm.

Locations impacted include...
Houlton, Hodgdon, Island Falls, Smyrna, Amity, Haynesville, Cary
Plantation, Smyrna Mills, Reed Plantation, Littleton, Linneus,
Oakfield, New Limerick, Ludlow, Merrill, Weston, Cary, Dyer Brook,
Orient and Bancroft.

This includes the following highways...
 Interstate 95 between mile markers 284 and 304.
 US Highway 1 between Orient and Littleton.

Heavy downpours may cause ponding of water on roadways.

LAT...LON 4588 6781 4586 6780 4582 6776 4580 6781
      4576 6781 4573 6778 4573 6780 4572 6781
      4573 6812 4617 6821 4627 6778 4594 6778
      4592 6775
TIME...MOT...LOC 1833Z 323DEG 17KT 4613 6797

Bloomer

Local storm report, Jul 2, 3:43 PM EDT, 2 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
343 PM EDT THU JUL 2 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0340 PM     HAIL             2 SSE KINGSBURY         45.09N 69.63W
07/02/2020  M0.25 INCH       PISCATAQUIS        ME   TRAINED SPOTTER

            HEAVY RAIN MIXED WITH PEA TO SLIGHTLY LARGER
            SIZE HAIL.

&&

JS

Local storm report, Jul 2, 3:49 PM EDT, 2 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
349 PM EDT THU JUL 2 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0348 PM     HAIL             2 SSE KINGSBURY         45.09N 69.63W
07/02/2020  M1.00 INCH       PISCATAQUIS        ME   TRAINED SPOTTER

&&

JS

Local storm report, Jul 2, 5:17 PM EDT, 35 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 1:47 PM EDT	Special Weather Statement	CAR	Piscataquis	58 min
Jul 2, 2:34 PM EDT	Special Weather Statement	CAR		56 min
Jul 2, 3:01 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	44 min
Jul 2, 3:50 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot	55 min
Jul 2, 4:45 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	45 min
Jul 2, 7:06 PM EDT	Special Weather Statement	CAR	Washington	54 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.