Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 239, NWS Gray, ME

September 27, 2007Sullivan County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Sep 27, 2007, 4:01 PM EDT for Sullivan County, New Hampshire. It was in force for 44 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 27, 2007, 4:01 PM EDT (20:01 UTC)
Expired: Sep 27, 2007, 4:45 PM EDT
In force: 44 min
Issued by: NWS Gray, ME
Area: Counties, with a storm outline in the text

County Sullivan County, NH

The radar

The Burlington radar (KCXX), 149 km from the middle of the area, began a volume at 20:04 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 27, 1:49 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.0 hours before the alert went out and 151 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: 924 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 814 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

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 27, 2:58 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Sep 27, 2:58 PM EDT, 1 hour 3 minutes before

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Hazardous weather outlook, Sep 27, 1:56 PM EDT, 2 hours 5 minutes before

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In the hours before

Local storm report, Sep 27, 3:16 PM EDT, 45 minutes before

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Local storm report, Sep 27, 3:22 PM EDT, 39 minutes before

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Local storm report, Sep 27, 3:27 PM EDT, 34 minutes before

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Local storm report, Sep 27, 3:42 PM EDT, 19 minutes before

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Special weather statement, Sep 27, 3:53 PM EDT, 8 minutes before

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Special weather statement, Sep 27, 4:01 PM EDT, 0 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
Sep 27, 8:15 AM EDT	Severe Thunderstorm Warning	GYX	York	45 min
Sep 27, 8:46 AM EDT	Special Marine Warning	GYX		59 min
Sep 27, 10:18 AM EDT	Severe Thunderstorm Warning	GYX	York	42 min
Sep 27, 10:48 AM EDT	Special Marine Warning	GYX		57 min
Sep 27, 3:29 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	31 min
Sep 27, 5:02 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	28 min
Sep 27, 5:32 PM EDT	Severe Thunderstorm Warning	GYX	Franklin	43 min
Sep 27, 6:20 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	40 min
Sep 27, 9:26 AM EDT	Severe Thunderstorm Warning	GYX	Strafford	34 min
Sep 27, 2:50 PM EDT	Severe Thunderstorm Warning	GYX	Sullivan	40 min
Sep 27, 2:52 PM EDT	Severe Thunderstorm Warning	GYX	Coos	38 min
Sep 27, 3:25 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Sullivan	35 min
Sep 27, 3:41 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Grafton	34 min
Sep 27, 4:15 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Grafton	45 min
Sep 27, 4:18 PM EDT	Severe Thunderstorm Warning	GYX	Coos	42 min
Sep 27, 4:43 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	47 min
Sep 27, 4:57 PM EDT	Severe Thunderstorm Warning	GYX	Sullivan	48 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2007 Every severe thunderstorm warning in 2007

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.