Alert archive / Maine / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Gray, ME

September 15, 2021Franklin County, Oxford County, Maine

NWS Gray, ME issued this severe thunderstorm warning at Sep 15, 2021, 3:04 PM EDT for Franklin County, Oxford County, Maine. It was in force for 41 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, 3:04 PM EDT (19:04 UTC)
Expired: Sep 15, 2021, 3:45 PM EDT
In force: 41 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 60.0 mph

Counties Franklin County, ME, Oxford County, ME

The radar

The Portland,ME radar (KGYX), 100 km from the middle of the area, began a volume at 19:06 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, 7.1 hours before the alert went out and 100 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.

659 
WUUS51 KGYX 151904 RRA
SVRGYX
MEC007-017-151945-
/O.NEW.KGYX.SV.W.0089.210915T1904Z-210915T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gray ME
304 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...
  Southwestern Franklin County in western Maine...

* Until 345 PM EDT.

* At 304 PM EDT, a severe thunderstorm was located 7 miles north of
  Andover, or 15 miles south of Rangeley, moving east at 30 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Farmington, Kingfield, Andover, Phillips, Weld, Wilton, Carthage,
  Avon, Byron, Perkins, Roxbury, Strong, South Arm, Temple, Freeman,
  Madrid, Salem, Sandy River Plantation, Town Of Washington and Mount
  Abram.

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.

&&

LAT...LON 4468 7087 4482 7088 4497 7021 4464 7016
TIME...MOT...LOC 1904Z 257DEG 26KT 4475 7076 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Legro

1 follow-up statement

089 
WWUS51 KGYX 151939
SVSGYX

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

MEC007-017-151945-
/O.CON.KGYX.SV.W.0089.000000T0000Z-210915T1945Z/
Oxford ME-Franklin ME-
339 PM EDT Wed Sep 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR CENTRAL OXFORD AND SOUTHWESTERN FRANKLIN COUNTIES...

At 339 PM EDT, a severe thunderstorm was located near Phillips, or 15
miles northwest of Farmington, moving east at 30 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, Kingfield, Phillips, Weld, Wilton, Carthage, Avon, Byron,
Perkins, Roxbury, Strong, Temple, Freeman, Madrid, Salem, Sandy River
Plantation, Town Of Washington, Mount Abram and Rangeley Plantation.

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 4467 7073 4487 7067 4497 7021 4464 7016
TIME...MOT...LOC 1939Z 257DEG 26KT 4481 7041 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 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, 3:41 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford, Somerset	49 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.