Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 165, NWS Gray, ME

July 27, 2008Rockingham County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 27, 2008, 4:02 PM EDT for Rockingham County, New Hampshire. It was in force for 58 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
Jul 27, 2008, 4:02 PM EDT (20:02 UTC)
Expired
Jul 27, 2008, 5:00 PM EDT
In force
58 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 20:02 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.

IssuedProductOfficeLasted
Jul 27, 12:02 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 8.0 hours before the alert went out and 173 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-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2008-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 448 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2008-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
448 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
912 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 3:26 PM EDTSevere Thunderstorm WarningGYXFranklin, Oxford64 min
Jul 27, 4:47 PM EDTSevere Thunderstorm WarningGYXFranklin, Kennebec, Somerset43 min
Jul 27, 5:59 PM EDTAreal Flood AdvisoryGYXYork2 hr
Jul 27, 5:59 PM EDTSpecial Marine WarningGYX61 min
Jul 27, 3:45 PM EDTSevere Thunderstorm WarningGYXMerrimack, Sullivan60 min
Jul 27, 3:49 PM EDTSevere Thunderstorm WarningGYXBelknap, Merrimack, Rockingham, Strafford56 min
Jul 27, 4:18 PM EDTAreal Flood AdvisoryGYXBelknap, Merrimack117 min
Jul 27, 4:34 PM EDTAreal Flood AdvisoryGYXBelknap, Merrimack, Rockingham, Strafford116 min
Jul 27, 4:45 PM EDTSevere Thunderstorm WarningGYXBelknap, Strafford45 min
Jul 27, 5:18 PM EDTAreal Flood AdvisoryGYXRockingham, Strafford117 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2008Every 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.