Alert archive / Virginia / Tornado Warnings in 2007

Tornado Warning 2, NWS Wakefield, VA

July 16, 2007Louisa County, Virginia

NWS Wakefield, VA issued this tornado warning at Jul 16, 2007, 3:10 PM EDT for Louisa County, Virginia. It was in force for 15 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: Jul 16, 2007, 3:10 PM EDT (19:10 UTC)
Expired: Jul 16, 2007, 3:25 PM EDT
In force: 15 min
Issued by: NWS Wakefield, VA
Area: Counties, with a storm outline in the text

County Louisa County, VA

The radar

The Sterling radar (KLWX), 123 km from the middle of the area, began a volume at 19:12 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
Jul 16, 3:21 PM EDT	HAIL 0.75	Ferncliff, VA

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 16, 1:58 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.2 hours before the alert went out and 124 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: 137 J/kg
Mixed-layer CIN: -218 J/kg
Mixed-layer LCL: 1200 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KAKQ 161910
TORAKQ
VAC109-161945-
/O.NEW.KAKQ.TO.W.0002.070716T1910Z-070716T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE WAKEFIELD VA
310 PM EDT MON JUL 16 2007

THE NATIONAL WEATHER SERVICE IN WAKEFIELD HAS ISSUED A

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

* UNTIL 345 PM EDT

* AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR BYRD
  MILL...OR ABOUT 8 MILES SOUTHWEST OF LOUISA...MOVING EAST AT 20
  MPH.

* THE TORNADO WILL BE NEAR...
  YANCEYVILLE BY 325 PM EDT...
  PENDLETON BY 335 PM EDT...
  APPLE GROVE AND CUCKOO BY 340 PM EDT...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS A
TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP
SHORTLY. IF YOU ARE IN THE PATH OF THIS FREQUENT STORM...MOVE INDOORS
AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF
DRIVING...GET OUT OF YOUR VEHICLE AND LIE FLAT IN A DITCH.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR BATHROOM...CLOSET OR HALLWAY. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY. STAY AWAY FROM WINDOWS.

PLEASE SEND YOUR REPORTS OF HAIL AND/OR WIND DAMAGE...INCLUDING TREES
OR LARGE LIMBS DOWNED...BY CALLING NOAAS NATIONAL WEATHER SERVICE IN
WAKEFIELD AT...1...800...7 3 7...8 6 2 4.

LAT...LON 3801 7809 3794 7814 3787 7797 3784 7792
      3800 7782

$$

25

1 follow-up statement

000 
WWUS51 KAKQ 161925
SVSAKQ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE WAKEFIELD VA
325 PM EDT MON JUL 16 2007

VAC109-161935-
/O.CAN.KAKQ.TO.W.0002.000000T0000Z-070716T1945Z/
LOUISA VA-
325 PM EDT MON JUL 16 2007

...THE TORNADO WARNING FOR CENTRAL LOUISA COUNTY IS CANCELLED...

LAT...LON 3801 7809 3794 7814 3787 7797 3784 7792
      3800 7782

$$

25

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 2:29 PM EDT	Severe Thunderstorm Warning	AKQ	Louisa	31 min
Jul 16, 3:00 PM EDT	Severe Thunderstorm Warning	AKQ	Fluvanna, Louisa	45 min
Jul 16, 3:24 PM EDT	Severe Thunderstorm Warning	AKQ	Goochland, Hanover, Louisa	51 min
Jul 16, 4:03 PM EDT	Severe Thunderstorm Warning	AKQ	Goochland, Hanover, Henrico	42 min
Jul 16, 5:10 PM EDT	Special Marine Warning	AKQ		65 min
Jul 16, 5:25 PM EDT	Special Marine Warning	AKQ		65 min
Jul 16, 5:31 PM EDT	Special Marine Warning	AKQ		59 min
Jul 16, 5:32 PM EDT	Severe Thunderstorm Warning	AKQ	Lancaster, Richmond	43 min
Jul 16, 6:18 PM EDT	Special Marine Warning	AKQ		57 min
Jul 16, 6:22 PM EDT	Special Marine Warning	AKQ		53 min

Nearby

Tornado Warnings in Virginia, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.