Alert archive / Virginia / Tornado Warnings in 2011

Tornado Warning 35, NWS Wakefield, VA

April 27, 2011Louisa County, Virginia

NWS Wakefield, VA issued this tornado warning at Apr 27, 2011, 8:27 PM EDT for Louisa County, Virginia. It was in force for 18 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 27, 2011, 8:27 PM EDT (00:27 UTC)
Expired
Apr 27, 2011, 8:45 PM EDT
In force
18 min
Issued by
NWS Wakefield, VA
Area
Storm-based polygon

County Louisa County, VA

The radar

The Sterling radar (KLWX), 108 km from the middle of the area, began a volume at 00:27 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.

IssuedProductOfficeLasted
Apr 27, 6:15 PM EDTTornado WatchSPC6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.5 hours before the alert went out and 109 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2011-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1143 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2011-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 283 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1143 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
834 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
283 m²/s²
0-3 km storm-relative helicity
353 m²/s²
Significant tornado parameter
1.8
Supercell composite
14.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

718 
WFUS51 KAKQ 280027
TORAKQ
VAC109-280045-
/O.NEW.KAKQ.TO.W.0035.110428T0027Z-110428T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE
827 PM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 845 PM EDT

* AT 826 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 5 MILES NORTHWEST OF LOUISA...AND MOVING
  NORTHEAST AT 45 MPH.

* THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF NORTH
  CENTRAL LOUISA COUNTY...INCLUDING THE FOLLOWING LOCATIONS VAWTER
  CORNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT...EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3815 7810 3815 7807 3814 7806 3814 7800
      3813 7798 3813 7796 3811 7792 3798 7807
      3803 7818
TIME...MOT...LOC 0028Z 214DEG 40KT 3807 7807

$$

ALBRIGHT

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 8:12 PM EDTTornado WarningAKQCaroline, Hanover33 min
Apr 27, 8:42 PM EDTTornado WarningAKQCaroline, Hanover48 min
Apr 27, 9:02 PM EDTSevere Thunderstorm WarningAKQFluvanna58 min
Apr 27, 9:15 PM EDTTornado WarningAKQCaroline30 min
Apr 27, 9:24 PM EDTTornado WarningAKQCumberland, Prince Edward30 min
Apr 28, 5:11 AM EDTSpecial Weather StatementAKQCumberland, Goochland, Powhatan, Prince Edward34 min
Apr 28, 9:25 AM EDTSpecial Weather StatementAKQCumberland, Fluvanna, Goochland, Louisa, Powhatan, Prince Edward65 min
Apr 28, 9:35 AM EDTSevere Thunderstorm WarningAKQAmelia, Caroline, Cumberland, Fluvanna, Goochland, Hanover and 3 more40 min
Apr 28, 10:09 AM EDTTornado WarningAKQGoochland, Hanover, Henrico, Louisa, Powhatan36 min
Apr 28, 10:12 AM EDTSevere Thunderstorm WarningAKQCaroline, Essex, Hanover, Louisa, Richmond, Westmoreland48 min
Apr 28, 10:25 AM EDTTornado WarningAKQCaroline, Essex, Hanover, King and Queen, Westmoreland35 min
Apr 28, 10:45 AM EDTSpecial Weather StatementAKQLunenburg, Mecklenburg, Nottoway, Prince Edward45 min
Apr 28, 10:56 AM EDTSevere Thunderstorm WarningAKQCaroline, Essex, Hanover, King and Queen, King William, Richmond and 1 more49 min
Apr 28, 11:09 AM EDTSpecial Weather StatementAKQAmelia, Cumberland, Goochland, Powhatan51 min
Apr 28, 11:30 AM EDTSpecial Weather StatementAKQLunenburg, Nottoway45 min
Apr 28, 12:22 PM EDTGale WarningAKQ7 hr
Apr 28, 3:40 PM EDTSpecial Weather StatementAKQHanover35 min
Apr 28, 4:16 PM EDTSpecial Weather StatementAKQWestmoreland59 min
Apr 28, 4:50 PM EDTSpecial Marine WarningAKQ100 min
Apr 28, 4:54 PM EDTSevere Thunderstorm WarningAKQCity of Chesapeake, City of Virginia Beach66 min
Apr 28, 5:28 PM EDTTornado WarningAKQCity of Virginia Beach32 min
Apr 28, 6:13 PM EDTSpecial Weather StatementAKQCity of Virginia Beach32 min
Apr 28, 6:27 PM EDTSpecial Marine WarningAKQ48 min
Apr 28, 6:44 PM EDTSpecial Weather StatementAKQChesterfield, Dinwiddie, Henrico, Mecklenburg61 min
Apr 28, 7:15 PM EDTSevere Thunderstorm WarningAKQCharles City, Chesterfield, Essex, Hanover, Henrico, King and Queen and 4 more45 min
Apr 28, 7:20 PM EDTSevere Thunderstorm WarningAKQBrunswick, Charles City, Chesterfield, Dinwiddie, James City, New Kent and 6 more55 min
Apr 28, 7:56 PM EDTSevere Thunderstorm WarningAKQCharles City, Essex, Gloucester, King and Queen, King William, Lancaster and 4 more49 min
Apr 28, 7:58 PM EDTSpecial Marine WarningAKQ107 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.