Alert archive / Virginia / Tornado Warnings in 2011
Tornado Warning 20, NWS Blacksburg, VA
NWS Blacksburg, VA issued this tornado warning at Apr 25, 2011, 5:17 PM EDT for Wythe County, Virginia. It was in force for 14 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 25, 2011, 5:17 PM EDT (21:17 UTC)
- Expired
- Apr 25, 2011, 5:31 PM EDT
- In force
- 14 min
- Issued by
- NWS Blacksburg, VA
- Area
- Storm-based polygon
County Wythe County, VA
The radar
The Roanoke radar (KFCX), 80 km from the middle of the area, began a volume at 21:16 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, 9.3 hours before the alert went out and 151 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1482 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
881
WFUS51 KRNK 252117
TORRNK
VAC197-252145-
/O.NEW.KRNK.TO.W.0020.110425T2117Z-110425T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
517 PM EDT MON APR 25 2011
THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A
* TORNADO WARNING FOR...
NORTHWESTERN WYTHE COUNTY IN SOUTHWEST VIRGINIA
* UNTIL 545 PM EDT.
* AT 512 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR FAVONIA...
OR NEAR RURAL RETREAT...MOVING NORTHEAST AT 25 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
WHEN IT IS SAFE TO DO SO...PLEASE RELAY YOUR SEVERE WEATHER REPORTS
TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE AT...1...8 6
6...2 1 5...4 3 2 4.
&&
LAT...LON 3702 8127 3703 8118 3702 8117 3703 8115
3703 8112 3702 8111 3704 8104 3689 8116
3692 8133
TIME...MOT...LOC 2117Z 223DEG 21KT 3696 8121
$$2 follow-up statements
470
WWUS51 KRNK 252124
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
524 PM EDT MON APR 25 2011
VAC197-252145-
/O.CON.KRNK.TO.W.0020.000000T0000Z-110425T2145Z/
WYTHE VA-
524 PM EDT MON APR 25 2011
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR NORTHERN
WYTHE COUNTY...
AT 521 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR FAVONIA...OR 6
MILES WEST OF WYTHEVILLE...MOVING NORTHEAST AT 25 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
QUARTER SIZE HAIL.
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN
DO SO SAFELY.
&&
LAT...LON 3693 8114 3695 8127 3702 8124 3703 8118
3702 8117 3703 8115 3703 8112 3702 8111
3704 8104
TIME...MOT...LOC 2124Z 223DEG 21KT 3699 8117
$$075
WWUS51 KRNK 252131
SVSRNK
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
531 PM EDT MON APR 25 2011
VAC197-252140-
/O.CAN.KRNK.TO.W.0020.000000T0000Z-110425T2145Z/
WYTHE VA-
531 PM EDT MON APR 25 2011
...THE TORNADO WARNING FOR NORTHERN WYTHE COUNTY IS CANCELLED...
THE TORNADO THREAT FOR THE WARNED AREA HAS ENDED. THE THUNDERSTORM
PRODUCING THE TORNADO HAS WEAKENED HOWEVER A SEVERE THUNDERSTORM
WARNING IS STILL IN EFFECT FOR LARGE HAIL AND DAMAGING WINDS.
STAY TUNED TO NOAA WEATHER RADIO...TV OR YOUR LOCAL NEW SOURCE FOR
THE LATEST WEATHER INFORMATION. REPORT ANY SEVERE WEATHER OR STORM
RELATED DAMAGE TO LOCAL LAW ENFORCEMENT OFFICIALS AND ASK THEM TO
IMMEDIATELY RELAY THE REPORT TO THE NATIONAL WEATHER SERVICE IN
BLACKSBURG.
TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4.
LAT...LON 3693 8114 3695 8127 3702 8124 3703 8118
3702 8117 3703 8115 3703 8112 3702 8111
3704 8104
TIME...MOT...LOC 2130Z 223DEG 21KT 3702 8114
$$The office that day
Everything else NWS Blacksburg, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 12:58 PM EDT | Special Weather Statement | RNK | Grayson, Wythe | 62 min |
| Apr 25, 1:24 PM EDT | Special Weather Statement | RNK | Smyth | 66 min |
| Apr 25, 2:15 PM EDT | Special Weather Statement | RNK | Wythe | 45 min |
| Apr 25, 2:30 PM EDT | Special Weather Statement | RNK | Smyth | 45 min |
| Apr 25, 3:08 PM EDT | Special Weather Statement | RNK | Tazewell | 37 min |
| Apr 25, 3:13 PM EDT | Severe Thunderstorm Warning | RNK | Smyth, Tazewell | 32 min |
| Apr 25, 3:21 PM EDT | Special Weather Statement | RNK | Carroll | 39 min |
| Apr 25, 3:51 PM EDT | Special Weather Statement | RNK | Smyth, Tazewell | 39 min |
| Apr 25, 3:58 PM EDT | Severe Thunderstorm Warning | RNK | Bland, Grayson, Smyth, Tazewell, Wythe | 62 min |
| Apr 25, 4:44 PM EDT | Severe Thunderstorm Warning | RNK | Bland, Smyth, Wythe | 61 min |
| Apr 25, 5:47 PM EDT | Severe Thunderstorm Warning | RNK | Bland, Pulaski, Wythe | 11 min |
| Apr 25, 6:06 PM EDT | Special Weather Statement | RNK | Bath | 24 min |
| Apr 25, 6:55 PM EDT | Severe Thunderstorm Warning | RNK | Bland, Smyth, Tazewell | 30 min |
Nearby
Tornado Warnings in Virginia, 2011Every tornado warning in 2011Tornadoes in 2011
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.