Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS Gray, ME

July 23, 2021Rockingham County, Strafford County, New Hampshire; York County, Maine

NWS Gray, ME issued this severe thunderstorm warning at Jul 23, 2021, 2:13 PM EDT for Rockingham County, Strafford County, New Hampshire; York County, Maine. It was in force for 27 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: Jul 23, 2021, 2:13 PM EDT (18:13 UTC)
Expired: Jul 23, 2021, 2:40 PM EDT
In force: 27 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties York County, ME, Rockingham County, NH, Strafford County, NH

The radar

The Portland,ME radar (KGYX), 94 km from the middle of the area, began a volume at 18:13 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

Gray, ME (KGYX), launched 12:00Z, 6.2 hours before the alert went out and 93 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: 16 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1504 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: -5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

877 
WUUS51 KGYX 231813
SVRGYX
MEC031-NHC015-017-231900-
/O.NEW.KGYX.SV.W.0064.210723T1813Z-210723T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gray ME
213 PM EDT Fri Jul 23 2021

The National Weather Service in Gray Maine has issued a

* Severe Thunderstorm Warning for...
  South central York County in southwestern Maine...
  East central Rockingham County in southern New Hampshire...
  Southeastern Strafford County in central New Hampshire...

* Until 300 PM EDT.

* At 212 PM EDT, a severe thunderstorm was located near South
  Berwick, or 8 miles north of Kittery, moving south 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...
  Portsmouth, Durham, Kittery, Dover, Greenland, York, Newington,
  Rye, South Berwick, Wells, Eliot, New Castle, Rollinsford, North
  Hampton and Ogunquit.

This includes the following highways...
 Interstate 95 between mile markers 1 and 12.
 Interstate 95 in New Hampshire between mile markers 11 and 16.

This also includes...
  York Beach.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4320 7089 4328 7066 4313 7057 4301 7068
      4296 7081
TIME...MOT...LOC 1812Z 342DEG 11KT 4321 7073 

HAIL...1.00IN
WIND...60MPH
 
$$

MSC

2 follow-up statements

426 
WWUS51 KGYX 231828
SVSGYX

Severe Weather Statement
National Weather Service Gray ME
228 PM EDT Fri Jul 23 2021

NHC015-017-231838-
/O.CAN.KGYX.SV.W.0064.000000T0000Z-210723T1900Z/
Rockingham NH-Strafford NH-
228 PM EDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ROCKINGHAM AND
SOUTHEASTERN STRAFFORD COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4318 7078 4325 7064 4313 7057 4303 7066
TIME...MOT...LOC 1828Z 335DEG 13KT 4314 7067 

$$

MEC031-231900-
/O.CON.KGYX.SV.W.0064.000000T0000Z-210723T1900Z/
York ME-
228 PM EDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTH CENTRAL YORK COUNTY...

At 228 PM EDT, a severe thunderstorm was located over York, or near
Kittery, moving southeast at 15 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Kittery, York and Eliot. 

This also includes...
  York Beach.
 
This includes Interstate 95 between mile markers 3 and 12.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4318 7078 4325 7064 4313 7057 4303 7066
TIME...MOT...LOC 1828Z 335DEG 13KT 4314 7067 

HAIL...0.75IN
WIND...60MPH
 
$$

Kimble

376 
WWUS51 KGYX 231840
SVSGYX

Severe Weather Statement
National Weather Service Gray ME
240 PM EDT Fri Jul 23 2021

MEC031-231850-
/O.CAN.KGYX.SV.W.0064.000000T0000Z-210723T1900Z/
York ME-
240 PM EDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL YORK COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

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

LAT...LON 4318 7078 4325 7064 4313 7057 4303 7066
TIME...MOT...LOC 1836Z 342DEG 11KT 4310 7065 

$$

Kimble

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 12:31 PM EDT	Special Weather Statement	GYX	Coos	29 min
Jul 23, 12:53 PM EDT	Special Weather Statement	GYX	Hillsborough	37 min
Jul 23, 12:57 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Strafford	33 min
Jul 23, 1:20 PM EDT	Special Weather Statement	GYX	Belknap	25 min
Jul 23, 1:37 PM EDT	Special Weather Statement	GYX	Carroll	23 min
Jul 23, 1:52 PM EDT	Special Weather Statement	GYX	Carroll	23 min
Jul 23, 2:16 PM EDT	Special Weather Statement	GYX	Carroll	29 min
Jul 23, 2:24 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	51 min
Jul 23, 2:36 PM EDT	Special Weather Statement	GYX	Belknap	24 min
Jul 23, 2:42 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Grafton	33 min
Jul 23, 3:35 PM EDT	Special Weather Statement	GYX	Coos	25 min
Jul 23, 3:38 PM EDT	Severe Thunderstorm Warning	GYX	Rockingham	21 min
Jul 23, 3:39 PM EDT	Coastal Flood Statement	GYX	Rockingham	10 hr
Jul 23, 4:18 PM EDT	Special Weather Statement	GYX	Merrimack	27 min
Jul 23, 4:27 PM EDT	Special Weather Statement	GYX	Rockingham	33 min
Jul 23, 4:38 PM EDT	Severe Thunderstorm Warning	GYX	Rockingham	18 min
Jul 23, 4:43 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Merrimack, Rockingham	47 min
Jul 23, 5:18 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos, Grafton	42 min
Jul 23, 5:35 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	18 min
Jul 23, 5:59 PM EDT	Special Weather Statement	GYX	Coos	31 min
Jul 23, 6:25 PM EDT	Special Weather Statement	GYX	Grafton	35 min
Jul 23, 7:35 PM EDT	Special Weather Statement	GYX	Carroll	25 min
Jul 23, 12:20 PM EDT	Special Weather Statement	GYX	York	25 min
Jul 23, 12:29 PM EDT	Special Weather Statement	GYX	Kennebec	31 min
Jul 23, 12:38 PM EDT	Special Weather Statement	GYX	York	37 min
Jul 23, 12:47 PM EDT	Special Weather Statement	GYX	Oxford	28 min
Jul 23, 1:05 PM EDT	Special Weather Statement	GYX	Androscoggin	25 min
Jul 23, 1:09 PM EDT	Special Weather Statement	GYX	Kennebec	36 min
Jul 23, 1:30 PM EDT	Special Weather Statement	GYX	Androscoggin	30 min
Jul 23, 1:41 PM EDT	Special Weather Statement	GYX	Kennebec	34 min
Jul 23, 1:45 PM EDT	Special Weather Statement	GYX	York	30 min
Jul 23, 1:57 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	27 min
Jul 23, 2:05 PM EDT	Special Weather Statement	GYX	Sagadahoc	25 min
Jul 23, 2:09 PM EDT	Special Weather Statement	GYX	Kennebec	36 min
Jul 23, 2:16 PM EDT	Special Marine Warning	GYX		26 min
Jul 23, 2:21 PM EDT	Special Weather Statement	GYX	Somerset	39 min
Jul 23, 2:50 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Sagadahoc	25 min
Jul 23, 2:56 PM EDT	Special Marine Warning	GYX		34 min
Jul 23, 3:13 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Sagadahoc	32 min
Jul 23, 3:19 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Oxford	41 min
Jul 23, 3:25 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Somerset	23 min
Jul 23, 3:27 PM EDT	Special Marine Warning	GYX		48 min
Jul 23, 3:34 PM EDT	Special Weather Statement	GYX	Androscoggin	26 min
Jul 23, 3:39 PM EDT	Special Marine Warning	GYX		66 min
Jul 23, 3:41 PM EDT	Special Weather Statement	GYX	Knox	34 min
Jul 23, 4:00 PM EDT	Special Weather Statement	GYX	Androscoggin	30 min
Jul 23, 4:09 PM EDT	Special Weather Statement	GYX	Androscoggin	36 min
Jul 23, 4:14 PM EDT	Special Weather Statement	GYX	Oxford	31 min
Jul 23, 4:22 PM EDT	Special Weather Statement	GYX	Kennebec	23 min
Jul 23, 4:44 PM EDT	Special Weather Statement	GYX	Androscoggin, Kennebec	31 min
Jul 23, 4:57 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	33 min
Jul 23, 5:23 PM EDT	Special Weather Statement	GYX	Lincoln	22 min
Jul 23, 5:28 PM EDT	Special Weather Statement	GYX	Cumberland, Sagadahoc	32 min
Jul 23, 5:53 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	37 min
Jul 23, 6:17 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	43 min
Jul 23, 6:19 PM EDT	Special Marine Warning	GYX		56 min
Jul 23, 6:30 PM EDT	Special Weather Statement	GYX	York	30 min
Jul 23, 6:57 PM EDT	Special Weather Statement	GYX	York	18 min
Jul 23, 7:06 PM EDT	Special Weather Statement	GYX	York	24 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2021 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.