Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 52, NWS Gray, ME

September 8, 20234 counties in New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Sep 8, 2023, 3:19 PM EDT for 4 counties in New Hampshire. It was in force for 36 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: Sep 8, 2023, 3:19 PM EDT (19:19 UTC)
Expired: Sep 8, 2023, 3:55 PM EDT
In force: 36 min
Issued by: NWS Gray, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH

The radar

The Portland,ME radar (KGYX), 124 km from the middle of the area, began a volume at 19:20 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, 7.3 hours before the alert went out and 124 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: 120 J/kg
Mixed-layer CIN: -230 J/kg
Mixed-layer LCL: 1296 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Sep 8, 10:48 AM EDT, 4 hours 31 minutes earlier.

Area forecast discussion, Sep 8, 10:48 AM EDT, 4 hours 31 minutes before

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Hazardous weather outlook, Sep 8, 3:45 AM EDT, 11 hours 34 minutes before

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</head>
<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 8:09 PM EDT	Special Weather Statement	GYX	Franklin	36 min
Sep 7, 8:47 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	43 min
Sep 8, 12:26 AM EDT	Special Weather Statement	GYX	Franklin, Oxford	64 min
Sep 8, 3:02 PM EDT	Special Marine Warning	GYX		88 min
Sep 8, 3:47 PM EDT	Severe Thunderstorm Warning	GYX	York	43 min
Sep 8, 3:52 PM EDT	Special Marine Warning	GYX		53 min
Sep 8, 4:26 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Sagadahoc, York	64 min
Sep 8, 4:31 PM EDT	Special Marine Warning	GYX		59 min
Sep 8, 4:50 PM EDT	Severe Thunderstorm Warning	GYX	Oxford, York	40 min
Sep 8, 5:32 PM EDT	Special Weather Statement	GYX	Androscoggin, Kennebec	43 min
Sep 8, 7:50 PM EDT	Special Weather Statement	GYX	York	55 min
Sep 7, 9:49 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire	41 min
Sep 7, 10:18 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Coos, Grafton, Merrimack, Sullivan	57 min
Sep 7, 10:32 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Hillsborough, Merrimack, Sullivan	25 min
Sep 7, 11:09 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack	51 min
Sep 7, 11:43 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Coos, Grafton, Merrimack	13 min
Sep 7, 11:55 PM EDT	Special Weather Statement	GYX	Carroll	35 min
Sep 8, 2:28 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Rockingham	62 min
Sep 8, 3:10 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Rockingham	65 min
Sep 8, 3:22 PM EDT	Special Weather Statement	GYX	Belknap	23 min
Sep 8, 3:44 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire	46 min
Sep 8, 4:01 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Merrimack, Strafford	44 min
Sep 8, 4:09 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire	51 min
Sep 8, 4:24 PM EDT	Severe Thunderstorm Warning	GYX	Sullivan	36 min
Sep 8, 4:58 PM EDT	Flash Flood Warning	GYX	Cheshire	3 hr
Sep 8, 5:10 PM EDT	Severe Thunderstorm Warning	GYX	Sullivan	50 min
Sep 8, 5:12 PM EDT	Flash Flood Warning	GYX	Sullivan	3 hr
Sep 8, 5:50 PM EDT	Special Weather Statement	GYX	Grafton	25 min
Sep 8, 5:54 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Grafton	36 min
Sep 8, 6:03 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire	42 min
Sep 8, 6:11 PM EDT	Special Weather Statement	GYX	Grafton	34 min
Sep 8, 6:37 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Hillsborough, Merrimack	38 min
Sep 8, 6:54 PM EDT	Severe Thunderstorm Warning	GYX	Hillsborough, Merrimack, Rockingham, Strafford	51 min
Sep 8, 7:31 PM EDT	Flash Flood Warning	GYX	Merrimack, Rockingham	3 hr

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2023 Every severe thunderstorm warning in 2023

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.