Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 4, NWS Gray, ME

May 19, 2015Carroll County, Grafton County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at May 19, 2015, 5:43 PM EDT for Carroll County, Grafton County, New Hampshire. It was in force for 25 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
May 19, 2015, 5:43 PM EDT (21:43 UTC)
Expired
May 19, 2015, 6:08 PM EDT
In force
25 min
Issued by
NWS Gray, ME
Area
Storm-based polygon

Counties Carroll County, NH, Grafton County, NH

The radar

The Portland,ME radar (KGYX), 101 km from the middle of the area, began a volume at 21:46 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, 9.7 hours before the alert went out and 100 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, Gray, ME at 12:00Z on 2015-05-19Temperature 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, Gray, ME at 12:00Z on 2015-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.19395878Sfc1 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
499 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
150 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
May 19, 2:25 PM EDTSmall Craft AdvisoryGYX29 hr
May 19, 5:37 PM EDTSpecial Weather StatementGYXFranklin53 min
May 19, 5:45 PM EDTSevere Thunderstorm WarningGYXOxford45 min
May 19, 6:22 PM EDTSpecial Weather StatementGYXFranklin53 min
May 19, 4:55 PM EDTSpecial Weather StatementGYXGrafton50 min
May 19, 5:05 PM EDTSevere Thunderstorm WarningGYXCoos40 min
May 19, 5:32 PM EDTSpecial Weather StatementGYXGrafton43 min
May 19, 6:24 PM EDTSpecial Weather StatementGYXCarroll51 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2015Every 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.