Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 39, NWS Gray, ME

July 15, 2026Cheshire County, Merrimack County, Sullivan County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jul 15, 2026, 3:05 AM EDT for Cheshire County, Merrimack County, Sullivan County, New Hampshire. It was in force for 40 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 15, 2026, 3:05 AM EDT (07:05 UTC)
Expired
Jul 15, 2026, 3:45 AM EDT
In force
40 min
Issued by
NWS Gray, ME
Area
Storm-based polygon
Damage threat
Considerable
Hail
1.5 in
Wind
70.0 mph

Counties Cheshire County, NH, Merrimack County, NH, Sullivan County, NH

The radar

The Boston radar (KBOX), 157 km from the middle of the area, began a volume at 07:07 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 15, 1:00 AM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 7.1 hours before the alert went out and 155 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 2026-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 957 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 2026-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 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
957 J/kg
Mixed-layer CIN
-316 J/kg
Mixed-layer LCL
2034 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
316 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 9:51 PM EDTSevere Thunderstorm WarningGYXOxford39 min
Jul 14, 10:21 PM EDTSevere Thunderstorm WarningGYXOxford, York17 min
Jul 15, 2:37 PM EDTCoastal Flood StatementGYXCumberland, York11 hr
Jul 14, 9:20 PM EDTSevere Thunderstorm WarningGYXCarroll, Coos, Grafton40 min
Jul 15, 3:41 AM EDTSevere Thunderstorm WarningGYXCheshire, Hillsborough, Merrimack, Sullivan49 min
Jul 15, 4:16 AM EDTSevere Thunderstorm WarningGYXHillsborough, Merrimack, Rockingham25 min
Jul 15, 4:42 AM EDTSevere Thunderstorm WarningGYXCheshire, Hillsborough, Sullivan33 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2026Every severe thunderstorm warning in 2026

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.