Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 145, NWS Gray, ME

August 4, 2015Hillsborough County, Merrimack County, Sullivan County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Aug 4, 2015, 6:07 PM EDT for Hillsborough County, Merrimack County, Sullivan County, New Hampshire. It was in force for 53 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, 2015, 6:07 PM EDT (22:07 UTC)
Expired: Aug 4, 2015, 7:00 PM EDT
In force: 53 min
Issued by: NWS Gray, ME
Area: Storm-based polygon

Counties Hillsborough County, NH, Merrimack County, NH, Sullivan County, NH

The radar

The Boston radar (KBOX), 150 km from the middle of the area, began a volume at 22:06 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
Aug 4, 12:18 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 10.1 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: 199 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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, 2:36 PM EDT, 3 hours 31 minutes earlier.

Area forecast discussion, Aug 4, 2:36 PM EDT, 3 hours 31 minutes before

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Hazardous weather outlook, Aug 4, 2:47 PM EDT, 3 hours 20 minutes before

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In the hours before

Local storm report, Aug 4, 5:39 PM EDT, 28 minutes before

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Local storm report, Aug 4, 5:44 PM EDT, 23 minutes before

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Local storm report, Aug 4, 5:48 PM EDT, 19 minutes before

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Special weather statement, Aug 4, 5:59 PM EDT, 8 minutes before

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Local storm report, Aug 4, 6:02 PM EDT, 5 minutes before

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Local storm report, Aug 4, 6:06 PM EDT, 1 minute 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 3, 8:36 PM EDT	Special Weather Statement	GYX		39 min
Aug 3, 10:10 PM EDT	Special Weather Statement	GYX	York	50 min
Aug 3, 11:45 PM EDT	Special Weather Statement	GYX	York	45 min
Aug 4, 12:31 AM EDT	Special Weather Statement	GYX	Sagadahoc	44 min
Aug 4, 8:27 AM EDT	Special Marine Warning	GYX		63 min
Aug 4, 1:05 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	55 min
Aug 4, 1:11 PM EDT	Special Weather Statement	GYX	Somerset	34 min
Aug 4, 1:46 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Somerset	44 min
Aug 4, 2:17 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	58 min
Aug 4, 2:29 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	38 min
Aug 4, 2:50 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	40 min
Aug 4, 2:54 PM EDT	Severe Thunderstorm Warning	GYX	York	51 min
Aug 4, 3:13 PM EDT	Severe Thunderstorm Warning	GYX	York	62 min
Aug 4, 3:16 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Oxford, Somerset	44 min
Aug 4, 3:18 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	57 min
Aug 4, 3:41 PM EDT	Special Marine Warning	GYX		64 min
Aug 4, 3:45 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	45 min
Aug 4, 3:55 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec, Somerset, Waldo	39 min
Aug 4, 4:10 PM EDT	Special Weather Statement	GYX	York	35 min
Aug 4, 4:16 PM EDT	Special Marine Warning	GYX		29 min
Aug 4, 4:24 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	51 min
Aug 4, 4:30 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Somerset, Waldo	60 min
Aug 4, 4:40 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Lincoln, Sagadahoc	22 min
Aug 4, 4:58 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	47 min
Aug 4, 5:26 PM EDT	Special Marine Warning	GYX		64 min
Aug 4, 5:31 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Lincoln, Sagadahoc	20 min
Aug 4, 5:44 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	29 min
Aug 3, 8:09 PM EDT	Special Weather Statement	GYX	Merrimack	36 min
Aug 3, 8:12 PM EDT	Severe Thunderstorm Warning	GYX	Coos	32 min
Aug 3, 8:27 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Hillsborough, Merrimack, Rockingham, Strafford	48 min
Aug 3, 10:59 PM EDT	Special Weather Statement	GYX	Strafford	46 min
Aug 4, 8:06 AM EDT	Special Weather Statement	GYX	Rockingham	24 min
Aug 4, 12:18 PM EDT	Special Weather Statement	GYX	Coos	57 min
Aug 4, 12:32 PM EDT	Special Weather Statement	GYX	Sullivan	28 min
Aug 4, 12:39 PM EDT	Special Weather Statement	GYX	Cheshire	36 min
Aug 4, 12:45 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Hillsborough, Merrimack, Sullivan	45 min
Aug 4, 12:55 PM EDT	Special Weather Statement	GYX	Sullivan	35 min
Aug 4, 1:24 PM EDT	Severe Thunderstorm Warning	GYX	Coos, Grafton	66 min
Aug 4, 1:28 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Hillsborough, Merrimack, Sullivan	47 min
Aug 4, 1:29 PM EDT	Special Weather Statement	GYX	Grafton	31 min
Aug 4, 1:34 PM EDT	Severe Thunderstorm Warning	GYX	Cheshire, Hillsborough	28 min
Aug 4, 1:38 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Carroll, Grafton, Merrimack	52 min
Aug 4, 1:51 PM EDT	Special Weather Statement	GYX	Cheshire	24 min
Aug 4, 2:05 PM EDT	Severe Thunderstorm Warning	GYX	Carroll	40 min
Aug 4, 2:08 PM EDT	Special Weather Statement	GYX	Rockingham	37 min
Aug 4, 2:10 PM EDT	Special Weather Statement	GYX	Hillsborough	35 min
Aug 4, 2:30 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Hillsborough, Merrimack, Rockingham, Strafford	45 min
Aug 4, 2:38 PM EDT	Special Weather Statement	GYX	Carroll	52 min
Aug 4, 4:51 PM EDT	Special Weather Statement	GYX	Carroll	24 min
Aug 4, 5:33 PM EDT	Special Weather Statement	GYX	Sullivan	27 min
Aug 4, 5:59 PM EDT	Special Weather Statement	GYX	Sullivan	31 min
Aug 4, 1:13 PM EDT	Special Weather Statement	GYX	Essex	32 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2015 Every severe thunderstorm warning in 2015

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.