Alert archive / Virginia / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 39, NWS Morristown, TN

May 1, 2002Washington County, Virginia

NWS Morristown, TN issued this severe thunderstorm warning at May 1, 2002, 10:38 PM EDT for Washington County, Virginia. It was in force for 52 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 1, 2002, 10:38 PM EDT (02:38 UTC)
Expired: May 1, 2002, 11:30 PM EDT
In force: 52 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Washington County, VA

The radar

The Knoxville radar (KMRX), 143 km from the middle of the area, began a volume at 02:41 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 1, 9:00 PM EDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.6 hours before the alert went out and 198 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: 292 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 1208 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMRX 020238
SVRMRX
VAC191-020330-
/NEW.KMRX.SV.W.0057.020238-020330/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
1038 PM EDT WED MAY 1 2002

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WASHINGTON COUNTY IN SOUTHWEST VIRGINIA

* UNTIL 1130 PM EDT

* AT 1030 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 11 MILES WEST OF BENHAMS...OR 10 MILES EAST OF
  GATE CITY...MOVING SOUTHEAST AT 65 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL SOUTHERN WASHINGTON COUNTY AT 1050 PM EDT

THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING...
  WINDS UP TO 70 MPH...WHICH COULD PUSH OVER SHALLOW ROOTED TREES...
  AND DAMAGE CHIMNEYS AND TV ANTENNAS.
  DAMAGING HAIL UP TO 1 3/4 INCH IN DIAMETER...OR THE SIZE OF
  GOLFBALLS.
  VERY HEAVY RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING.

A TORNADO WATCH IS ALSO IN EFFECT. REMEMBER...TORNADOES CAN AND
OCCASIONALLY DO DEVELOP RAPIDLY IN SEVERE THUNDERSTORMS. IF
THREATENING WEATHER IS OBSERVED...MOVE TO SAFE SHELTER IMMEDIATELY.
$$

LAT...LON 3672 8232 3661 8229 3663 8217 3662 8166
          3663 8161 3692 8184

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 1, 9:30 PM EDT	Severe Thunderstorm Warning	MRX	Lee	45 min
May 1, 9:47 PM EDT	Severe Thunderstorm Warning	MRX	Scott, Wise, City of Norton	43 min
May 1, 10:27 PM EDT	Severe Thunderstorm Warning	MRX	Scott, City of Bristol	48 min
May 2, 2:08 PM EDT	Severe Thunderstorm Warning	MRX	Wise	52 min
May 2, 2:41 PM EDT	Severe Thunderstorm Warning	MRX	Russell	19 min
May 2, 3:24 PM EDT	Severe Thunderstorm Warning	MRX	Wise, City of Norton	51 min
May 2, 4:36 PM EDT	Severe Thunderstorm Warning	MRX	Wise	24 min
May 2, 7:07 PM EDT	Severe Thunderstorm Warning	MRX	Russell	23 min
May 2, 7:30 PM EDT	Severe Thunderstorm Warning	MRX	Scott	45 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2002 Every severe thunderstorm warning in 2002

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.