Alert archive / Virginia / Tornado Warnings in 2011

Tornado Warning 79, NWS Wakefield, VA

October 13, 2011Louisa County, Virginia

NWS Wakefield, VA issued this tornado warning at Oct 13, 2011, 3:37 PM EDT for Louisa County, Virginia. It was in force for 23 min. 1 report 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: Oct 13, 2011, 3:37 PM EDT (19:37 UTC)
Expired: Oct 13, 2011, 4:00 PM EDT
In force: 23 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon

County Louisa County, VA

The radar

The Sterling radar (KLWX), 116 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
Oct 13, 3:40 PM EDT	TORNADO	Green Springs, VA	TREES DOWN AND ROOF DAMAGE REPORTED.

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.6 hours before the alert went out and 117 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: 69 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 451 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 180 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.

122 
WFUS51 KAKQ 131937
TORAKQ
VAC109-132000-
/O.NEW.KAKQ.TO.W.0079.111013T1937Z-111013T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WAKEFIELD VA
337 PM EDT THU OCT 13 2011

THE NATIONAL WEATHER SERVICE IN WAKEFIELD HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN LOUISA COUNTY IN CENTRAL VIRGINIA...

* UNTIL 400 PM EDT

* AT 336 PM EDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO NEAR
  BOSWELLS TAVERN...OR NEAR GORDONSVILLE. DOPPLER RADAR SHOWED THIS
  TORNADO MOVING NORTHEAST AT 25 MPH.

* THE TORNADO WILL AFFECT MAINLY RURAL AREAS OF NORTHWESTERN LOUISA
  COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE... OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3805 7827 3814 7821 3813 7818 3815 7814
      3814 7812 3816 7810 3814 7802 3799 7816
      3803 7829 3804 7829
TIME...MOT...LOC 1937Z 209DEG 22KT 3810 7818

$$

ALBRIGHT

1 follow-up statement

679 
WWUS51 KAKQ 131953
SVSAKQ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WAKEFIELD VA
353 PM EDT THU OCT 13 2011

VAC109-132003-
/O.EXP.KAKQ.TO.W.0079.000000T0000Z-111013T2000Z/
LOUISA VA-
353 PM EDT THU OCT 13 2011

...THE TORNADO WARNING FOR NORTHWESTERN LOUISA COUNTY WILL EXPIRE AT
400 PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 3805 7827 3814 7821 3813 7818 3815 7814
      3814 7812 3816 7810 3814 7802 3799 7816
      3803 7829 3804 7829
TIME...MOT...LOC 1953Z 209DEG 22KT 3819 7812

$$

BHURLEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 2:33 AM EDT	Coastal Flood Advisory	AKQ	Northumberland, Westmoreland	4 hr
Oct 13, 3:30 AM EDT	Special Weather Statement	AKQ	Chesterfield, Goochland, Powhatan, City of Richmond	60 min
Oct 13, 6:31 AM EDT	Special Weather Statement	AKQ	Cumberland, Goochland, Prince Edward	59 min
Oct 13, 7:01 AM EDT	Small Craft Advisory	AKQ		3 hr
Oct 13, 11:18 AM EDT	Coastal Flood Advisory	AKQ	Accomack, Lancaster, Northumberland, Westmoreland	9 hr
Oct 13, 3:46 PM EDT	Tornado Warning	AKQ	Goochland, Hanover, Louisa	29 min
Oct 13, 4:47 PM EDT	Tornado Warning	AKQ	Hanover, King William, New Kent	28 min
Oct 13, 4:51 PM EDT	Small Craft Advisory	AKQ		59 hr
Oct 13, 5:13 PM EDT	Tornado Warning	AKQ	Essex, King and Queen, King William	31 min
Oct 13, 5:31 PM EDT	Severe Thunderstorm Warning	AKQ	City of Chesapeake, City of Virginia Beach	44 min
Oct 13, 5:32 PM EDT	Special Marine Warning	AKQ		58 min
Oct 13, 6:04 PM EDT	Tornado Warning	AKQ	Caroline, Hanover, Louisa	26 min

Nearby

Tornado Warnings in Virginia, 2011 Every tornado warning in 2011 Tornadoes 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.