Alert archive / New Hampshire / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 39, NWS Gray, ME

September 21, 1998Coos County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Sep 21, 1998, 5:33 PM EDT for Coos County, New Hampshire. It was in force for 37 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
Sep 21, 1998, 5:33 PM EDT (21:33 UTC)
Expired
Sep 21, 1998, 6:10 PM EDT
In force
37 min
Issued by
NWS Gray, ME
Area
Whole counties

County Coos County, NH

The radar

The Portland,ME radar (KGYX), 122 km from the middle of the area, began a volume at 21:32 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, 9.6 hours before the alert went out and 122 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 1998-09-21Temperature 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 1998-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
562 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
69 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.

807 
WUUS1 KPWM 212136 RRA
SVRPWM
NHC007-212210-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAY ME
533 PM EDT MON SEP 21 1998

THE NATIONAL WEATHER SERVICE IN GRAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN COOS COUNTY IN NORTHERN NEW HAMPSHIRE

* UNTIL 610 PM EDT

* AT 530 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A SEVERE THUNDERSTORM 33 MILES WEST NORTHWEST OF
  BERLIN OR 14 MILES WEST OF NORTHUMBERLAND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  STRATFORD AT 540 PM EDT
  NORTHUMBERLAND AT 540 PM EDT
  LANCASTER AT 540 PM EDT
  JEFFERSON AT 555 PM EDT

GOLF BALL SIZE HAIL WAS REPORTED WITH THIS THUNDERSTORM JUST NORTH
OF LYNDONVILLE VERMONT

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS

TFH

Nearby

Severe Thunderstorm Warnings in New Hampshire, 1998Every severe thunderstorm warning in 1998

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.