Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 91, NWS Gray, ME

June 29, 2008Rockingham County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jun 29, 2008, 5:19 PM EDT for Rockingham County, New Hampshire. It was in force for 56 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: Jun 29, 2008, 5:19 PM EDT (21:19 UTC)
Expired: Jun 29, 2008, 6:15 PM EDT
In force: 56 min
Issued by: NWS Gray, ME
Area: Storm-based polygon

County Rockingham County, NH

The radar

The Boston radar (KBOX), 115 km from the middle of the area, began a volume at 21:19 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, 9.3 hours before the alert went out and 121 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 443 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 181 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 Jun 29, 3:49 PM EDT, 1 hour 30 minutes earlier.

Area forecast discussion, Jun 29, 3:49 PM EDT, 1 hour 30 minutes before

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Hazardous weather outlook, Jun 29, 10:36 AM EDT, 6 hours 43 minutes before

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In the hours before

Special weather statement, Jun 29, 3:54 PM EDT, 1 hour 25 minutes before

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Special weather statement, Jun 29, 4:43 PM EDT, 36 minutes before

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Special weather statement, Jun 29, 5:09 PM EDT, 10 minutes before

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Local storm report, Jun 29, 5:13 PM EDT, 6 minutes before

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Special weather statement, Jun 29, 5:15 PM EDT, 4 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
Jun 29, 3:03 AM EDT	Flash Flood Watch	GYX	Franklin, Oxford, Somerset	31 hr
Jun 29, 8:46 AM EDT	Areal Flood Advisory	GYX	Oxford	119 min
Jun 29, 4:06 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack, Sullivan	54 min
Jun 29, 5:01 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack	44 min
Jun 29, 5:46 PM EDT	Severe Thunderstorm Warning	GYX	Belknap, Merrimack	44 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2008 Every severe thunderstorm warning in 2008

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.