Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 24, NWS Gray, ME

July 7, 20144 counties in New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 7, 2014, 3:22 PM EDT for 4 counties in New Hampshire. It was in force for 38 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 7, 2014, 3:22 PM EDT (19:22 UTC)
Expired
Jul 7, 2014, 4:00 PM EDT
In force
38 min
Issued by
NWS Gray, ME
Area
Storm-based polygon

Counties Belknap County, NH, Carroll County, NH, Grafton County, NH, Merrimack County, NH

The radar

The Portland,ME radar (KGYX), 106 km from the middle of the area, began a volume at 19:23 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

Albany, NY (KALY), launched 12:00Z, 7.4 hours before the alert went out and 215 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, Albany, NY at 12:00Z on 2014-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Albany, NY at 12:00Z on 2014-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1583 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 3:17 AM EDTSmall Craft Advisory for Hazardous SeasGYX31 hr
Jul 7, 4:33 PM EDTSevere Thunderstorm WarningGYXCumberland, York42 min
Jul 7, 5:12 PM EDTSpecial Weather StatementGYXCumberland33 min
Jul 7, 7:09 PM EDTSpecial Weather StatementGYXKennebec51 min
Jul 7, 7:15 PM EDTSevere Thunderstorm WarningGYXKennebec26 min
Jul 7, 1:42 PM EDTSpecial Weather StatementGYXSullivan63 min
Jul 7, 2:41 PM EDTSpecial Weather StatementGYXBelknap, Carroll, Grafton, Merrimack34 min
Jul 7, 3:19 PM EDTSpecial Weather StatementGYXBelknap, Carroll56 min
Jul 7, 3:54 PM EDTSevere Thunderstorm WarningGYXBelknap, Carroll, Strafford36 min
Jul 7, 4:17 PM EDTSpecial Weather StatementGYXCarroll43 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2014Every severe thunderstorm warning in 2014

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.