Alert archive / Virginia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 554, NWS Blacksburg, VA

September 3, 2011Alleghany County, Bath County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Sep 3, 2011, 3:37 PM EDT for Alleghany County, Bath County, Virginia. It was in force for 24 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 3, 2011, 3:37 PM EDT (19:37 UTC)
Expired: Sep 3, 2011, 4:01 PM EDT
In force: 24 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Alleghany County, VA, Bath County, VA

The radar

The Roanoke radar (KFCX), 107 km from the middle of the area, began a volume at 19:39 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.

What was reported inside it

Time	Report	Where	Remark
Sep 3, 3:38 PM EDT	TSTM WND DMG	3 Ssw Hot Springs, VA	LARGE TREE LIMBS DOWN
Sep 3, 3:40 PM EDT	TSTM WND DMG	4 Nne Clifton Forge Cit, VA	LARGE TREE DOWN NEAR ENTRANCE OF DOUTHAT STATE PARK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 7.6 hours before the alert went out and 84 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: 1125 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 471 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 116 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.

191 
WUUS51 KRNK 031937
SVRRNK
VAC005-017-032045-
/O.NEW.KRNK.SV.W.0554.110903T1937Z-110903T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
337 PM EDT SAT SEP 3 2011

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

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

* UNTIL 445 PM EDT.

* AT 334 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
  NEAR DOUTHAT STATE PARK...OR 7 MILES SOUTHEAST OF HOT SPRINGS...AND
  MOVING WEST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DOUTHAT STATE PARK...
  INGALLS FIELD...
  CARLOOVER...
  NATURAL WELL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF QUARTER 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 3804 7967 3792 7962 3787 7965 3785 7962
      3776 7967 3780 7981 3785 7982 3788 8014
      3795 8006 3800 8000 3803 7998
TIME...MOT...LOC 1938Z 078DEG 26KT 3792 7977

$$

2 follow-up statements

524 
WWUS51 KRNK 031951
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
351 PM EDT SAT SEP 3 2011

VAC005-017-032045-
/O.CON.KRNK.SV.W.0554.000000T0000Z-110903T2045Z/
BATH VA-ALLEGHANY VA-
351 PM EDT SAT SEP 3 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHERN BATH AND EASTERN ALLEGHANY COUNTIES...

AT 347 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR LONGDALE FURNACE...OR
NEAR CLIFTON FORGE CITY...MOVING SOUTH AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
  LONGDALE FURNACE...
  IRON GATE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. ONCE AGAIN THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4.

&&

LAT...LON 3792 7962 3787 7965 3785 7962 3776 7967
      3780 7981 3785 7982 3787 8002 3794 7984
TIME...MOT...LOC 1951Z 017DEG 11KT 3784 7977

$$

096 
WWUS51 KRNK 032001
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
401 PM EDT SAT SEP 3 2011

VAC005-017-032012-
/O.CAN.KRNK.SV.W.0554.000000T0000Z-110903T2045Z/
BATH VA-ALLEGHANY VA-
401 PM EDT SAT SEP 3 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BATH AND EASTERN
ALLEGHANY COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND
EXITED THE WARNED AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1 8 6 6...2 1 5...4 3 2 4.

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.

LAT...LON 3792 7962 3787 7965 3785 7962 3776 7967
      3780 7981 3785 7982 3787 8002 3794 7984
TIME...MOT...LOC 2002Z 017DEG 11KT 3781 7978

$$

AMS

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 8:23 PM EDT	Severe Thunderstorm Warning	RNK	Grayson	19 min
Sep 2, 8:32 PM EDT	Special Weather Statement	RNK	Pulaski, City of Radford	58 min
Sep 3, 1:29 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Rockbridge, City of Buena Vista	61 min
Sep 3, 1:41 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, Giles, City of Covington	64 min
Sep 3, 2:02 PM EDT	Flash Flood Warning	RNK	Rockbridge	4 hr
Sep 3, 2:32 PM EDT	Special Weather Statement	RNK	Rockbridge	43 min
Sep 3, 2:50 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath	55 min
Sep 3, 3:00 PM EDT	Severe Thunderstorm Warning	RNK	Bath, Rockbridge	38 min
Sep 3, 3:23 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt, City of Covington	67 min
Sep 3, 3:45 PM EDT	Special Weather Statement	RNK	Tazewell	30 min
Sep 3, 3:55 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt, Craig	65 min
Sep 3, 4:08 PM EDT	Special Weather Statement	RNK	Wythe	52 min
Sep 3, 4:17 PM EDT	Special Weather Statement	RNK	Craig	43 min
Sep 3, 4:25 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Craig, Montgomery, Roanoke	65 min
Sep 3, 4:53 PM EDT	Severe Thunderstorm Warning	RNK	Botetourt, Carroll, Floyd, Franklin, Montgomery, Pulaski and 4 more	67 min
Sep 3, 5:00 PM EDT	Severe Thunderstorm Warning	RNK	Wythe	60 min
Sep 3, 5:19 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Giles, Pulaski, Wythe	56 min
Sep 3, 5:27 PM EDT	Special Weather Statement	RNK	Smyth	33 min
Sep 3, 6:02 PM EDT	Special Weather Statement	RNK	Carroll, Floyd, Franklin, Wythe	43 min
Sep 3, 6:21 PM EDT	Flash Flood Warning	RNK	Wythe	3 hr

Nearby

Severe Thunderstorm Warnings in Virginia, 2011 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.