Alert archive / Virginia / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 39, NWS Blacksburg, VA

May 22, 2004Botetourt County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 22, 2004, 6:41 PM EDT for Botetourt County, Virginia. It was in force for 49 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: May 22, 2004, 6:41 PM EDT (22:41 UTC)
Expired: May 22, 2004, 7:30 PM EDT
In force: 49 min
Issued by: NWS Blacksburg, VA
Area: Counties, with a storm outline in the text

County Botetourt County, VA

The radar

The Roanoke radar (KFCX), 68 km from the middle of the area, began a volume at 22:42 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

Roanoke, VA (KRNK), launched 12:00Z, 10.7 hours before the alert went out and 33 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: 1378 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 137 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.

342 
WUUS51 KRNK 222241
SVRRNK
VAC023-222330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
639 PM EDT SAT MAY 22 2004

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BOTETOURT COUNTY IN WEST CENTRAL VIRGINIA

* UNTIL 730 PM EDT

* AT 637 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR LAYMANTOWN...OR ABOUT OVER STEWARTSVILLE...
  AND MOVING NORTHEAST AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BLUE RIDGE PARKWAY BY 655 PM EDT
  6 MILES SOUTHEAST OF NACE BY 705 PM EDT
  6 MILES SOUTH OF LITHIA BY 730 PM EDT

HAIL UP TO THREE QUARTER INCHES IN DIAMETER HAS BEEN REPORTED IN 
BONSACK WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE 
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

PLEASE SEND YOUR REPORTS OF PENNY OR LARGER SIZED HAIL...AS WELL AS
WIND DAMAGE...INCLUDING TREES OR LARGE LIMBS DOWNED BY CALLING THE
NATIONAL WEATHER SERVICE TOLL FREE AT...1...8 6 6...2 1 5...4 3 2 4.

LAT...LON 3750 7957 3745 7958 3746 7964 3749 7966
      3748 7969 3739 7982 3738 7979 3735 7979
      3732 7984 3737 7995 3759 7968

$$

AMS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 10:01 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany	29 min
May 22, 2:56 PM EDT	Severe Thunderstorm Warning	RNK	Grayson	49 min
May 22, 5:46 PM EDT	Severe Thunderstorm Warning	RNK	Franklin	29 min
May 22, 6:05 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	55 min
May 22, 6:14 PM EDT	Severe Thunderstorm Warning	RNK	Roanoke, City of Roanoke	31 min
May 22, 6:56 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	64 min
May 22, 7:39 PM EDT	Severe Thunderstorm Warning	RNK	Montgomery	36 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2004 Every severe thunderstorm warning in 2004

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.