Alert archive / New Hampshire / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 4, NWS Boston/Norton, MA

February 22, 1997Hillsborough County, New Hampshire

NWS Boston/Norton, MA issued this severe thunderstorm warning at Feb 22, 1997, 2:48 PM EST for Hillsborough County, New Hampshire. It was in force for 42 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Feb 22, 1997, 2:48 PM EST (19:48 UTC)
Expired: Feb 22, 1997, 3:30 PM EST
In force: 42 min
Issued by: NWS Boston/Norton, MA
Area: Whole counties

County Hillsborough County, NH

The radar

The Boston radar (KBOX), 117 km from the middle of the area, began a volume at 19:52 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.

What was reported inside it

Time	Report	Where	Remark
Feb 22, 3:00 PM EST	Thunderstorm Wind 50	Lyndeborough, NH	A rare outbreak of out-of-season thunderstorms occurred after temperatures reached the mid to upper 60s and approached record high readings for February. A line of thunderstorms, some severe, moved through the county. In Pelham, trees and wires were knocked

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 7.8 hours before the alert went out and 160 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 482 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 260 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.

000 
TTAA00 KBOS 221949 RRA
SVRBOS
NHC011-222030-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
248 PM EST SAT FEB 22 1997
 
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  330 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH NEW HAMPSHIRE
 
   ...SOUTHEASTERN HILLSBOROUGH COUNTY
 
A SEVERE THUNDERSTORM MOVING THROUGH GROTON IN NORTHERN MIDDLESEX
COUNTY OF MASSACHUSETTS IS MOVING EAST-NORTHEAST AT 40 MPH AND WILL
MOVE INTO SOUTHEAST HILLSBOROUGH COUNTY OF NEW HAMPSHIRE BY 3 PM.
THIS STORM CONTAINS DAMAGING WINDS AND SMALL HAIL.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND OF AT LEAST 58 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
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
CZEPYHA

Nearby

Severe Thunderstorm Warnings in New Hampshire, 1997 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.