Alert archive / Virginia / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 21, NWS Blacksburg, VA

May 21, 2004Bath County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at May 21, 2004, 2:04 PM EDT for Bath County, Virginia. It was in force for 41 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 21, 2004, 2:04 PM EDT (18:04 UTC)
Expired: May 21, 2004, 2:45 PM EDT
In force: 41 min
Issued by: NWS Blacksburg, VA
Area: Counties, with a storm outline in the text

County Bath County, VA

The radar

The Roanoke radar (KFCX), 125 km from the middle of the area, began a volume at 18:06 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 21, 1:00 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 6.1 hours before the alert went out and 100 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: 532 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 845 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -50 m²/s²
0-3 km storm-relative helicity: 11 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.

206 
WUUS51 KRNK 211804
SVRRNK
VAC017-211845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
204 PM EDT FRI MAY 21 2004

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BATH COUNTY IN WEST CENTRAL VIRGINIA

* UNTIL 245 PM EDT

* AT 203 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  MOUNTAIN GROVE...OR ABOUT OVER WARM SPRINGS...AND MOVING SOUTH AT
  35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BACOVA JUNCTION AND 7 MILES EAST OF CALLISON BY 210 PM EDT
  INGALLS FIELD AND 7 MILES WEST OF NIMROD HALL BY 220 PM EDT

IF ON OR NEAR LAKE MOOMAW...GET OUT OF THE WATER AND MOVE INDOORS OF 
INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 15 MILES 
FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU ARE 
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW. 
DONT BE CAUGHT ON THE WATER IN A THUNDERSTORM

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 3822 7974 3816 7996 3792 7988 3790 7968
          3801 7957

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 2:41 PM EDT	Severe Thunderstorm Warning	RNK	Rockbridge	64 min
May 21, 3:03 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt	57 min
May 21, 3:32 PM EDT	Severe Thunderstorm Warning	RNK	Amherst	58 min
May 21, 3:48 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt	57 min
May 21, 3:49 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, City of Lynchburg	26 min
May 21, 3:54 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, City of Lynchburg	21 min
May 21, 4:16 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, City of Lynchburg	44 min
May 21, 4:27 PM EDT	Severe Thunderstorm Warning	RNK	Bedford	63 min
May 21, 4:50 PM EDT	Severe Thunderstorm Warning	RNK	Pittsylvania	55 min
May 21, 5:11 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	64 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.