Alert archive / Virginia / Tornado Warnings in 2009

Tornado Warning 9, NWS Blacksburg, VA

June 10, 20094 counties in Virginia

NWS Blacksburg, VA issued this tornado warning at Jun 10, 2009, 3:52 PM EDT for 4 counties in Virginia. It was in force for 38 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: Jun 10, 2009, 3:52 PM EDT (19:52 UTC)
Expired: Jun 10, 2009, 4:30 PM EDT
In force: 38 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Bedford County, VA, Botetourt County, VA, City of Roanoke, VA, Roanoke County, VA

The radar

The Roanoke radar (KFCX), 51 km from the middle of the area, began a volume at 19:54 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
Jun 10, 4:05 PM EDT	HAIL 0.75	Vinton, VA
Jun 10, 4:15 PM EDT	TSTM WND DMG	3 E Vinton, VA	SEVERAL TREES DOWN

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, 7.9 hours before the alert went out and 27 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: 366 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 726 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 86 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.

000 
WFUS51 KRNK 101952
TORRNK
VAC019-023-161-770-102030-
/O.NEW.KRNK.TO.W.0009.090610T1952Z-090610T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
352 PM EDT WED JUN 10 2009

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* TORNADO WARNING FOR...
  CITY OF ROANOKE IN WEST CENTRAL VIRGINIA
  SOUTHERN BOTETOURT COUNTY IN WEST CENTRAL VIRGINIA
  EASTERN ROANOKE COUNTY IN WEST CENTRAL VIRGINIA
  WESTERN BEDFORD COUNTY IN SOUTH CENTRAL VIRGINIA

* UNTIL 430 PM EDT.

* AT 351 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR VINTON...OR
  NEAR STEWARTSVILLE...MOVING NORTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  VINTON...
  STEWARTSVILLE...
  BLUE RIDGE...
  CHAMBLISSBURG...
  MONTVALE...

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 3747 7967 3727 7956 3721 7977 3723 7978
      3722 7980 3723 7982 3722 7983 3722 7987
      3718 7991 3734 8000
TIME...MOT...LOC 1953Z 247DEG 10KT 3729 7985

$$

1 follow-up statement

000 
WWUS51 KRNK 102031
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
431 PM EDT WED JUN 10 2009

VAC019-023-161-770-102039-
/O.EXP.KRNK.TO.W.0009.000000T0000Z-090610T2030Z/
CITY OF ROANOKE VA-BOTETOURT VA-ROANOKE VA-BEDFORD VA-
431 PM EDT WED JUN 10 2009

...THE TORNADO WARNING FOR THE CITY OF ROANOKE...WESTERN BEDFORD...
EASTERN ROANOKE AND SOUTHERN BOTETOURT COUNTIES EXPIRES AT 430 PM
EDT...

THE ROTATION WITH THIS STORM HAS WEAKEN AS IT MOVED NORTHEAST. 
LARGE HAIL AND DAMAGING WINDS MAY STILL BE POSSIBLE UNTIL 440 PM.
ADDITIONAL THUNDERSTORMS MAY DEVELOP THIS AFTERNOON. 

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 3747 7967 3727 7956 3721 7977 3723 7978
      3722 7980 3723 7982 3722 7983 3722 7987
      3718 7991 3734 8000
TIME...MOT...LOC 2029Z 247DEG 10KT 3729 7982

$$

KK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 8:17 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	88 min
Jun 9, 9:30 PM EDT	Flash Flood Warning	RNK	Amherst	6 hr
Jun 9, 9:57 PM EDT	Special Weather Statement	RNK	Campbell	33 min
Jun 9, 10:34 PM EDT	Special Weather Statement	RNK	Halifax	56 min
Jun 9, 11:36 PM EDT	Special Weather Statement	RNK	Bedford	24 min
Jun 10, 12:15 AM EDT	Special Weather Statement	RNK	Bath	30 min
Jun 10, 1:03 AM EDT	Special Weather Statement	RNK	City of Covington	27 min
Jun 10, 2:42 PM EDT	Special Weather Statement	RNK	Giles, City of Radford	63 min
Jun 10, 2:52 PM EDT	Severe Thunderstorm Warning	RNK	Bland, Giles, Montgomery, Pulaski, City of Radford	68 min
Jun 10, 3:12 PM EDT	Special Weather Statement	RNK	Bath	63 min
Jun 10, 3:46 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Roanoke, City of Roanoke	59 min
Jun 10, 3:55 PM EDT	Severe Thunderstorm Warning	RNK	Floyd, Montgomery, Roanoke	53 min
Jun 10, 4:12 PM EDT	Special Weather Statement	RNK	Buckingham	63 min
Jun 10, 4:54 PM EDT	Special Weather Statement	RNK	City of Martinsville	66 min
Jun 10, 5:19 PM EDT	Flash Flood Warning	RNK	Amherst	6 hr
Jun 10, 5:20 PM EDT	Special Weather Statement	RNK	Craig, Giles	55 min
Jun 10, 5:56 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Campbell, Halifax, Pittsylvania	64 min
Jun 10, 6:08 PM EDT	Special Weather Statement	RNK	Pittsylvania	67 min
Jun 10, 6:55 PM EDT	Special Weather Statement	RNK	City of Danville	65 min

Nearby

Tornado Warnings in Virginia, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.