Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 80, NWS Gray, ME

August 4, 2024Grafton County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Aug 4, 2024, 7:23 PM EDT for Grafton County, New Hampshire. It was in force for 52 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: Aug 4, 2024, 7:23 PM EDT (23:23 UTC)
Expired: Aug 4, 2024, 8:15 PM EDT
In force: 52 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Grafton County, NH

The radar

The Burlington radar (KCXX), 125 km from the middle of the area, began a volume at 23:26 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

Albany, NY (KALY), launched 12:00Z, 11.4 hours before the alert went out and 214 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: 707 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 623 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Gray, ME wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 2:19 PM EDT, 5 hours 4 minutes earlier.

Area forecast discussion, Aug 4, 2:19 PM EDT, 5 hours 4 minutes before

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Hazardous weather outlook, Aug 4, 3:18 PM EDT, 4 hours 5 minutes before

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In the hours before

Special weather statement, Aug 4, 3:20 PM EDT, 4 hours 3 minutes before

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Local storm report, Aug 4, 3:46 PM EDT, 3 hours 37 minutes before

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Special weather statement, Aug 4, 3:57 PM EDT, 3 hours 26 minutes before

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Special weather statement, Aug 4, 4:15 PM EDT, 3 hours 8 minutes before

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Special weather statement, Aug 4, 5:02 PM EDT, 2 hours 21 minutes before

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Special weather statement, Aug 4, 7:02 PM EDT, 21 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 7:55 AM EDT	Areal Flood Advisory	GYX	Cumberland, York	2 hr
Aug 4, 7:59 AM EDT	Flash Flood Warning	GYX	Cumberland, York	2 hr
Aug 4, 8:40 AM EDT	Areal Flood Advisory	GYX	Cumberland, Lincoln, Sagadahoc	2 hr
Aug 4, 1:10 PM EDT	Special Weather Statement	GYX	Somerset	35 min
Aug 4, 1:17 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	43 min
Aug 4, 1:44 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	22 min
Aug 4, 3:20 PM EDT	Special Weather Statement	GYX	Franklin	40 min
Aug 4, 3:52 PM EDT	Areal Flood Advisory	GYX	Franklin, Somerset	53 min
Aug 4, 3:57 PM EDT	Special Weather Statement	GYX	Oxford	33 min
Aug 4, 5:02 PM EDT	Special Weather Statement	GYX	Kennebec	43 min
Aug 4, 7:08 PM EDT	Areal Flood Advisory	GYX	Franklin	2 hr
Aug 4, 7:32 PM EDT	Special Weather Statement	GYX	Somerset	58 min
Aug 4, 8:16 AM EDT	Areal Flood Advisory	GYX	Belknap, Carroll, Merrimack, Strafford	119 min
Aug 4, 12:39 PM EDT	Flash Flood Warning	GYX	Hillsborough, Rockingham	3 hr
Aug 4, 12:44 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Rockingham	20 min
Aug 4, 1:28 PM EDT	Areal Flood Advisory	GYX	Rockingham	119 min
Aug 4, 1:33 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Rockingham	42 min
Aug 4, 1:52 PM EDT	Flash Flood Warning	GYX	Rockingham	95 min
Aug 4, 1:56 PM EDT	Severe Thunderstorm Warning	GYX	Coos	36 min
Aug 4, 2:17 PM EDT	Severe Thunderstorm Warning	GYX	Coos	43 min
Aug 4, 2:27 PM EDT	Areal Flood Advisory	GYX	Coos	105 min
Aug 4, 4:15 PM EDT	Special Weather Statement	GYX	Grafton	30 min
Aug 4, 4:48 PM EDT	Areal Flood Advisory	GYX	Grafton	3 hr
Aug 4, 7:02 PM EDT	Special Weather Statement	GYX	Grafton	58 min
Aug 4, 7:57 PM EDT	Special Weather Statement	GYX	Grafton	48 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2024 Every severe thunderstorm warning in 2024

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.