Alert archive / Virginia / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 13, NWS Blacksburg, VA

April 30, 2003Patrick County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 30, 2003, 4:51 PM EDT for Patrick County, Virginia. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 30, 2003, 4:51 PM EDT (20:51 UTC)
Expired: Apr 30, 2003, 5:30 PM EDT
In force: 39 min
Issued by: NWS Blacksburg, VA
Area: Counties, with a storm outline in the text

County Patrick County, VA

The radar

The Roanoke radar (KFCX), 36 km from the middle of the area, began a volume at 20:46 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.9 hours before the alert went out and 75 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: 8 J/kg
Mixed-layer CIN: -241 J/kg
Mixed-layer LCL: 1558 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 63 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.

446 
WUUS51 KRNK 302051
SVRRNK
VAC141-302130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
451 PM EDT WED APR 30 2003

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN PATRICK COUNTY IN SOUTHWEST VIRGINIA

* UNTIL 530 PM EDT.

* AT 449 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 2 MILES SOUTH OF STUART...MOVING NORTH AT 20
  MPH.

* SOME LOCATIONS THREATENED THROUGH 530 PM EDT INCLUDE
  STUART...
  WOOLWINE...

RELAY SEVERE WEATHER REPORTS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1...8 6 6...2 1 5...4 3 2 4.

LAT...LON 3655 8031 3657 8039 3682 8033 3687 8024
          3684 8007 3681 8006 3677 8009 3673 8009
          3655 8018

$$

09

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 30, 3:54 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	51 min
Apr 30, 4:22 PM EDT	Severe Thunderstorm Warning	RNK	Giles	38 min
Apr 30, 4:36 PM EDT	Severe Thunderstorm Warning	RNK	Craig, Roanoke	39 min
Apr 30, 4:44 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	31 min
Apr 30, 5:17 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Roanoke	28 min
Apr 30, 5:46 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt	44 min
Apr 30, 5:47 PM EDT	Severe Thunderstorm Warning	RNK	Franklin	28 min
Apr 30, 5:55 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania	35 min
Apr 30, 6:28 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	47 min
Apr 30, 6:36 PM EDT	Severe Thunderstorm Warning	RNK	Campbell	39 min
Apr 30, 7:01 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, City of Lynchburg	44 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2003 Every severe thunderstorm warning in 2003

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.