Alert archive / Maine / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 46, NWS Gray, ME
NWS Gray, ME issued this severe thunderstorm warning at Jul 20, 2021, 2:46 PM EDT for Cumberland County, Maine. It was in force for 44 min. 2 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
- Jul 20, 2021, 2:46 PM EDT (18:46 UTC)
- Expired
- Jul 20, 2021, 3:30 PM EDT
- In force
- 44 min
- Issued by
- NWS Gray, ME
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Cumberland County, ME
The radar
The Portland,ME radar (KGYX), 24 km from the middle of the area, began a volume at 18:46 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 2:55 PM EDT | TSTM WND DMG | 2 Nnw Portland, ME | TREE LIMBS DOWN NEAR WASHINGTON AND ALLEN AVE IN PORTLAND. |
| Jul 20, 3:10 PM EDT | TSTM WND DMG | Falmouth, ME | MULTIPLE TREES DOWN, SOME ON WIRES. PAYSON RD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Gray, ME (KGYX), launched 12:00Z, 6.8 hours before the alert went out and 24 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.
- Mixed-layer CAPE
- 205 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1050 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
440
WUUS51 KGYX 201846
SVRGYX
MEC005-201930-
/O.NEW.KGYX.SV.W.0046.210720T1846Z-210720T1930Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gray ME
246 PM EDT Tue Jul 20 2021
The National Weather Service in Gray Maine has issued a
* Severe Thunderstorm Warning for...
Southeastern Cumberland County in southwestern Maine...
* Until 330 PM EDT.
* At 245 PM EDT, a severe thunderstorm was located over Falmouth, or
just north of Portland, moving east at 15 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...
Portland, South Portland, Westbrook, Cumberland, Falmouth, Cape
Elizabeth, Yarmouth, Harpswell and Chebeague Island.
This includes the following highways...
Interstate 295 between mile markers 4 and 14.
Interstate 95 between mile markers 49 and 53.
This also includes...
Peaks Island, Long Island, Cushing Island, Cousins Island, and
Bailey Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4365 7031 4369 7034 4375 7030 4378 7021
4380 6996 4363 7000 4362 7005 4359 7008
TIME...MOT...LOC 1845Z 275DEG 15KT 4372 7027
HAIL...1.00IN
WIND...60MPH
$$
Kimble1 follow-up statement
603
WWUS51 KGYX 201914
SVSGYX
Severe Weather Statement
National Weather Service Gray ME
314 PM EDT Tue Jul 20 2021
MEC005-201930-
/O.CON.KGYX.SV.W.0046.000000T0000Z-210720T1930Z/
Cumberland ME-
314 PM EDT Tue Jul 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHEASTERN CUMBERLAND COUNTY...
At 312 PM EDT, a severe thunderstorm was located near Falmouth
Foreside, moving east at 10 mph into Casco Bay. Damaging winds and
torrential rainfall are likely.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Portland, South Portland, Cumberland, Falmouth, Harpswell and
Chebeague Island.
This also includes...
Peaks Island, Long Island, Cushing Island, Great Diamond Island,
and Mackworth Island.
This includes Interstate 295 between mile markers 6 and 12.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4364 7023 4368 7028 4374 7026 4375 7020
4374 7000 4363 7006 4360 7012
TIME...MOT...LOC 1912Z 290DEG 9KT 4369 7021
HAIL...1.00IN
WIND...60MPH
$$
KimbleThe office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 2:08 PM EDT | Special Weather Statement | GYX | Androscoggin, Cumberland | 82 min |
| Jul 20, 2:46 PM EDT | Special Marine Warning | GYX | 59 min | |
| Jul 20, 3:44 PM EDT | Special Weather Statement | GYX | York | 16 min |
| Jul 20, 4:00 PM EDT | Special Marine Warning | GYX | 32 min |
Nearby
Severe Thunderstorm Warnings in Maine, 2021Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.