Alert archive / Maine / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Gray, ME

September 15, 2021Franklin County, Oxford County, Somerset County, Maine

NWS Gray, ME issued this severe thunderstorm warning at Sep 15, 2021, 3:41 PM EDT for Franklin County, Oxford County, Somerset County, Maine. It was in force for 49 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: Sep 15, 2021, 3:41 PM EDT (19:41 UTC)
Expired: Sep 15, 2021, 4:30 PM EDT
In force: 49 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Franklin County, ME, Oxford County, ME, Somerset County, ME

The radar

The Portland,ME radar (KGYX), 88 km from the middle of the area, began a volume at 19:44 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 15, 1:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 7.7 hours before the alert went out and 89 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: 101 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 468 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 299 m²/s²
0-3 km storm-relative helicity: 318 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

126 
WUUS51 KGYX 151941
SVRGYX
MEC007-017-025-152030-
/O.NEW.KGYX.SV.W.0091.210915T1941Z-210915T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gray ME
341 PM EDT Wed Sep 15 2021

The National Weather Service in Gray Maine has issued a

* Severe Thunderstorm Warning for...
  Central Oxford County in western Maine...
  South central Somerset County in west central Maine...
  Southeastern Franklin County in western Maine...

* Until 430 PM EDT.

* At 341 PM EDT, a severe thunderstorm was located near Weld, or 14
  miles north of Rumford, moving east at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Farmington, Madison, Jay, Bingham, Phillips, Weld, Wilton,
  Norridgewock, Anson, Chesterville, Embden, Carthage, Avon, Byron,
  Solon, Strong, Industry, Town Of Washington, Salem and Perkins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Gray Maine.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4461 6992 4458 6995 4459 7003 4456 7005
      4464 7069 4483 7061 4502 6980
TIME...MOT...LOC 1941Z 254DEG 36KT 4475 7048 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Legro

1 follow-up statement

430 
WWUS51 KGYX 152017
SVSGYX

Severe Weather Statement
National Weather Service Gray ME
417 PM EDT Wed Sep 15 2021

MEC007-017-025-152030-
/O.CON.KGYX.SV.W.0091.000000T0000Z-210915T2030Z/
Oxford ME-Somerset ME-Franklin ME-
417 PM EDT Wed Sep 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHEASTERN OXFORD...SOUTH CENTRAL SOMERSET AND SOUTHEASTERN
FRANKLIN COUNTIES...

At 417 PM EDT, a severe thunderstorm was located near Madison, or 14
miles northwest of Skowhegan, moving east at 40 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Farmington, Madison, Jay, Bingham, Phillips, Wilton, Weld,
Norridgewock, Anson, Chesterville, Embden, Carthage, Avon, Solon,
Strong, Industry, Town Of Washington, Salem, Perkins and Starks.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Gray Maine.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4461 6992 4458 6995 4459 7003 4456 7005
      4463 7058 4491 7027 4502 6980
TIME...MOT...LOC 2017Z 254DEG 36KT 4485 6999 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Legro

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 15, 2:33 AM EDT	Small Craft Advisory	GYX		19 hr
Sep 15, 6:56 AM EDT	Special Weather Statement	GYX	Franklin	64 min
Sep 15, 7:53 AM EDT	Special Weather Statement	GYX	Franklin	52 min
Sep 15, 9:00 AM EDT	Special Weather Statement	GYX	Franklin	45 min
Sep 15, 2:33 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	42 min
Sep 15, 3:04 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	41 min
Sep 15, 4:09 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford	51 min
Sep 15, 4:28 PM EDT	Tornado Warning	GYX	Cumberland, Oxford	32 min
Sep 15, 4:44 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	46 min
Sep 15, 4:58 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	29 min
Sep 15, 5:14 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Kennebec, Oxford, Sagadahoc	46 min
Sep 15, 5:29 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	61 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.