Alert archive / New Hampshire / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 4, NWS Gray, ME

May 15, 1997Belknap County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at May 15, 1997, 7:12 PM EDT for Belknap County, New Hampshire. It was in force for 63 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, 7:12 PM EDT (23:12 UTC)
Expired
May 15, 1997, 8:15 PM EDT
In force
63 min
Issued by
NWS Gray, ME
Area
Whole counties

County Belknap County, NH

The radar

The Portland,ME radar (KGYX), 103 km from the middle of the area, began a volume at 23:15 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, 11.2 hours before the alert went out and 102 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.

299 
WUUS1 KPWM 152312 RRA
SVRPWM
NHC001-160012-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAY ME
712 PM EDT THU MAY 15 1997
 
THE NATIONAL WEATHER SERVICE IN GRAY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN  NEW HAMPSHIRE
 
   ...BELKNAP COUNTY
 
THE NATIONAL WEATHER SERVICE DOPPLER RADAR WAS OBSERVING A SEVERE
THUNDERSTORM JUST EAST OF THE TOWN OF FRANKLIN ALONG THE MERRIMACK AND
BELKNAP BORDER. THIS STORM IS EXPECTED TO PRODUCE LARGE HAIL. MOVEMENT
IS TO THE EAST AT 10 TO 15 MPH AND WILL AFFECT THE TOWNS OF BELMONT BY
725 PM AND REACH GILMANTON BETWEEN 745 AND 800 PM.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
 
FITZSIMMONS/LULOFS

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, 4:30 PM EDTSevere Thunderstorm WarningGYXBelknap, Strafford60 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.