Alert archive / Virginia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 21, NWS Baltimore/Washington

May 16, 1998Augusta County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at May 16, 1998, 7:35 PM EDT for Augusta County, Virginia. It was in force for 60 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
May 16, 1998, 7:35 PM EDT (23:35 UTC)
Expired
May 16, 1998, 8:35 PM EDT
In force
60 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Augusta County, VA

What was reported inside it

TimeReportWhereRemark
May 16, 8:15 PM EDTHail 1.75Verona, VA

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

Roanoke, VA (KRNK), launched 12:00Z, 11.6 hours before the alert went out and 112 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, Roanoke, VA at 12:00Z on 1998-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 419 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, Roanoke, VA at 12:00Z on 1998-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 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
419 J/kg
Mixed-layer CIN
-187 J/kg
Mixed-layer LCL
1113 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KWBC 162335 RRA
SVRWBC
VAC015-170035-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
735 PM EDT SAT MAY 16 1998

THE NATIONAL WEATHER SERVICE IN STERLING VA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN AND CENTRAL AUGUSTA COUNTY VA

* UNTIL 835 PM EDT

* AT 733 PM EDT... A SEVERE THUNDERSTORM WAS INDICATED... OVER
  EXTREME NORTHEAST HIGHLAND COUNTY AND NORTHWEST AUGUSTA COUNTY...
  BY DOPPLER WEATHER RADAR... MOVING SOUTHEAST 15 MPH.

* THIS STORM IS LIKELY PRODUCING LARGE HAIL AND TORRENTIAL RAINS.
  HEAVY RAINS FROM THE STORM MAY CAUSE FLOODING OF ROADS AND SMALL
  STREAMS.

IF YOU ARE CAUGHT OUTSIDE... GET INSIDE A STRONG BUILDING.
DAMAGING WINDS...LARGE HAIL...HEAVY RAIN...AND LIGHTNING ARE
LIKELY. DO NOT STAND UNDER TREES OR OTHER ISOLATED TALL OBJECTS.
THESE ATTRACT LIGHTNING. DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

STAY TUNED TO TV...RADIO ANzD NOAA WEATHER RADIO FOR UPDATES AND
WARNINGS.

JLW/SMZ

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 16, 7:13 PM EDTSevere Thunderstorm WarningLWXHighland62 min

Nearby

Severe Thunderstorm Warnings in Virginia, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.