Alert archive / New Hampshire / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 3, NWS Gray, ME

May 15, 1997Belknap County, Strafford County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at May 15, 1997, 4:30 PM EDT for Belknap County, Strafford County, New Hampshire. It was in force for 60 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 15, 1997, 4:30 PM EDT (20:30 UTC)
Expired
May 15, 1997, 5:30 PM EDT
In force
60 min
Issued by
NWS Gray, ME
Area
Whole counties

Counties Belknap County, NH, Strafford County, NH

The radar

The Portland,ME radar (KGYX), 95 km from the middle of the area, began a volume at 20:31 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, 8.5 hours before the alert went out and 94 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 1997-05-15Temperature 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 1997-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.1939587897Sfc1 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
1394 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

202 
WUUS1 KPWM 152032 RRA
SVRPWM
NHC001-017-152130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAY ME
430 PM EDT THU MAY 15 1997
 
THE NATIONAL WEATHER SERVICE IN GRAY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN NEW HAMPSHIRE
 
   ...SOUTHERN BELKNAP AND STRAFFORD COUNTIES
 
AT 427 PM...DOPPLER WEATHER RADAR INDICATED A THUNDERSTORM CONTAINING
LARGE HAIL EAST OF PENACOOK IN MERRIMACK COUNTY MOVING NORTHEAST AT 30
MPH. IT WILL MOVE THROUGH CENTER BARNSTEAD IN SOUTHERN BELKNAP COUNTY
...REACHING FARMINGTON IN STRAFFORD COUNTY BY 515 PM. PENNY SIZED HAIL
WAS REPORTED FROM A WEATHER SPOTTER IN PENACOOK.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
JC/MF NWSFO GYX

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 3:54 PM EDTSevere Thunderstorm WarningGYXMerrimack51 min
May 15, 7:12 PM EDTSevere Thunderstorm WarningGYXBelknap63 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 1997Every severe thunderstorm warning in 1997

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.