Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 28, NWS Gray, ME

May 30, 2015Oxford County, Maine; Carroll County, Coos County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at May 30, 2015, 9:44 PM EDT for Oxford County, Maine; Carroll County, Coos County, New Hampshire. It was in force for 31 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 30, 2015, 9:44 PM EDT (01:44 UTC)
Expired
May 30, 2015, 10:15 PM EDT
In force
31 min
Issued by
NWS Gray, ME
Area
Storm-based polygon

Counties Oxford County, ME, Carroll County, NH, Coos County, NH

The radar

The Portland,ME radar (KGYX), 84 km from the middle of the area, began a volume at 01:45 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 00:00Z, 1.7 hours before the alert went out and 288 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 00:00Z on 2015-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 318 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, Albany, NY at 00:00Z on 2015-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 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
318 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
1499 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
209 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 9:04 PM EDTSevere Thunderstorm WarningGYXCoos, Grafton41 min
May 30, 9:38 PM EDTSpecial Weather StatementGYXGrafton37 min
May 31, 3:09 PM EDTSpecial Weather StatementGYXRockingham111 min
May 30, 8:48 PM EDTSpecial Weather StatementGYXEssex42 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2015Severe Thunderstorm Warnings in Maine, 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.