Alert archive / Virginia / Tornado Warnings in 2017

Tornado Warning 3, NWS Blacksburg, VA

April 22, 2017Charlotte County, Halifax County, Virginia

NWS Blacksburg, VA issued this tornado warning at Apr 22, 2017, 4:06 PM EDT for Charlotte County, Halifax 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: Apr 22, 2017, 4:06 PM EDT (20:06 UTC)
Expired: Apr 22, 2017, 4:30 PM EDT
In force: 24 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Charlotte County, VA, Halifax County, VA

The radar

The Roanoke radar (KFCX), 127 km from the middle of the area, began a volume at 20:06 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
Apr 22, 4:23 PM EDT	TSTM WND DMG	3 Nnw Mt Laurel, VA	MULTIPLE TREES DOWN ON NEALS CORNER ROAD
Apr 22, 4:28 PM EDT	TSTM WND DMG	2 Sw Clover, VA	A SHED WAS BLOWN DOWN ALONG ROUTE 360

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
Apr 22, 3:17 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 8.1 hours before the alert went out and 70 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: 28 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 755 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

277 
WFUS51 KRNK 222006
TORRNK
VAC037-083-222030-
/O.NEW.KRNK.TO.W.0003.170422T2006Z-170422T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service BLACKSBURG VA
406 PM EDT SAT APR 22 2017

The National Weather Service in BLACKSBURG has issued a

* Tornado Warning for...
  South central Charlotte County in south central Virginia...
  Central Halifax County in south central Virginia...

* Until 430 PM EDT
    
* At 406 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Halifax, moving east at 40 mph.

  HAZARD...Tornado and quarter size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Crystal Hill around 410 PM EDT. 
  Scottsburg around 420 PM EDT. 
  Clover and Mt Laurel around 425 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

&&

LAT...LON 3675 7902 3686 7905 3699 7865 3676 7860
TIME...MOT...LOC 2006Z 253DEG 34KT 3681 7895 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

DS

2 follow-up statements

566 
WWUS51 KRNK 222014
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
414 PM EDT SAT APR 22 2017

VAC037-083-222030-
/O.CON.KRNK.TO.W.0003.000000T0000Z-170422T2030Z/
Charlotte VA-Halifax VA-
414 PM EDT SAT APR 22 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM EDT FOR 
SOUTH CENTRAL CHARLOTTE AND CENTRAL HALIFAX COUNTIES...
    
At 414 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Crystal Hill, moving east at 40 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Mt Laurel around 420 PM EDT. 
  Clover around 425 PM EDT. 
  Redoak and Saxe around 430 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

&&

LAT...LON 3686 7894 3697 7865 3678 7860 3678 7893
TIME...MOT...LOC 2014Z 255DEG 36KT 3682 7885 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DS

097 
WWUS51 KRNK 222026
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
426 PM EDT SAT APR 22 2017

VAC037-083-222035-
/O.EXP.KRNK.TO.W.0003.000000T0000Z-170422T2030Z/
Charlotte VA-Halifax VA-
426 PM EDT SAT APR 22 2017

...THE TORNADO WARNING FOR SOUTH CENTRAL CHARLOTTE AND CENTRAL 
HALIFAX COUNTIES WILL EXPIRE AT 430 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire.

A severe thunderstorm watch remains in effect until 900 PM EDT for
north central North Carolina...and central and south central
Virginia.

When it is safe to do so, please send your reports of hail of any
size, as well as reports of any wind damage, including downed trees
or large limbs, to the National Weather Service by calling toll free
at 1...8 6 6...2 1 5...4 3 2 4. Reports and pictures can also be
shared on the National Weather Service Blacksburg Facebook page and
on Twitter.

LAT...LON 3686 7894 3697 7865 3678 7860 3678 7893
TIME...MOT...LOC 2025Z 253DEG 34KT 3685 7874 

$$

DS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 12:31 PM EDT	Special Weather Statement	RNK	City of Roanoke	44 min
Apr 22, 1:40 PM EDT	Special Weather Statement	RNK	Franklin	65 min
Apr 22, 2:02 PM EDT	Special Weather Statement	RNK	Patrick, City of Martinsville	58 min
Apr 22, 2:20 PM EDT	Special Weather Statement	RNK	Patrick	25 min
Apr 22, 2:37 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Bedford, Campbell, Halifax, Pittsylvania, City of Lynchburg	53 min
Apr 22, 2:41 PM EDT	Special Weather Statement	RNK	Halifax	34 min
Apr 22, 2:54 PM EDT	Tornado Warning	RNK	Charlotte, Halifax	23 min
Apr 22, 3:01 PM EDT	Special Weather Statement	RNK	Pittsylvania	29 min
Apr 22, 3:09 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Henry, Pittsylvania	51 min
Apr 22, 3:15 PM EDT	Special Weather Statement	RNK	Charlotte	45 min
Apr 22, 4:00 PM EDT	Special Weather Statement	RNK	Halifax, City of Danville	30 min
Apr 22, 4:11 PM EDT	Flood Watch	RNK	Amherst, Appomattox, Bedford, Bland, Botetourt, Campbell and 27 more	64 hr

Nearby

Tornado Warnings in Virginia, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.