Alert archive / Virginia / Tornado Warnings in 2017

Tornado Warning 8, NWS Blacksburg, VA

May 10, 2017Halifax County, Virginia

NWS Blacksburg, VA issued this tornado warning at May 10, 2017, 8:58 PM EDT for Halifax County, Virginia. It was in force for 32 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: May 10, 2017, 8:58 PM EDT (00:58 UTC)
Expired: May 10, 2017, 9:30 PM EDT
In force: 32 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Halifax County, VA

The radar

The Roanoke radar (KFCX), 131 km from the middle of the area, began a volume at 00:59 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 nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 1.0 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: 13 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 2016 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

734 
WFUS51 KRNK 110058
TORRNK
VAC083-110130-
/O.NEW.KRNK.TO.W.0008.170511T0058Z-170511T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service BLACKSBURG VA
858 PM EDT WED MAY 10 2017

The National Weather Service in BLACKSBURG has issued a

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

* Until 930 PM EDT
    
* At 858 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Aspen, moving south at 20 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...
  Crystal Hill and Mt Laurel around 925 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 3679 7874 3678 7892 3697 7889 3697 7880
      3696 7880 3695 7878
TIME...MOT...LOC 0058Z 352DEG 15KT 3696 7886 

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

$$

16

3 follow-up statements

489 
WWUS51 KRNK 110106
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
906 PM EDT WED MAY 10 2017

VAC083-110130-
/O.CON.KRNK.TO.W.0008.000000T0000Z-170511T0130Z/
Halifax VA-
906 PM EDT WED MAY 10 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR 
CENTRAL HALIFAX COUNTY...
    
At 905 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Mt Laurel, moving southeast at 35 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 915 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 3679 7874 3678 7892 3693 7890 3695 7886
      3694 7880
TIME...MOT...LOC 0105Z 336DEG 30KT 3690 7883 

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

$$

16

022 
WWUS51 KRNK 110112
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
912 PM EDT WED MAY 10 2017

VAC083-110130-
/O.CON.KRNK.TO.W.0008.000000T0000Z-170511T0130Z/
Halifax VA-
912 PM EDT WED MAY 10 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR 
CENTRAL HALIFAX COUNTY...
    
At 912 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Mt Laurel, moving south at 30 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 tornadic thunderstorm will remain over mainly rural areas of 
central Halifax County.

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 3678 7890 3693 7888 3694 7880 3679 7874
TIME...MOT...LOC 0112Z 342DEG 27KT 3686 7881 

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

$$

16

205 
WWUS51 KRNK 110127
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
927 PM EDT WED MAY 10 2017

VAC083-110136-
/O.EXP.KRNK.TO.W.0008.000000T0000Z-170511T0130Z/
Halifax VA-
927 PM EDT WED MAY 10 2017

...THE TORNADO WARNING FOR 
CENTRAL HALIFAX COUNTY WILL EXPIRE AT 930 PM EDT...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore, the warning will be allowed to expire.  However hail and 
damaging winds are still possible with this thunderstorm.

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.

Remember, a Severe Thunderstorm Warning still remains in effect for
Halifax and Charlotte Counties until 1015 PM EDT.

LAT...LON 3678 7890 3693 7888 3694 7880 3679 7874
TIME...MOT...LOC 0126Z 352DEG 15KT 3681 7880 

$$

16

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 8:06 PM EDT	Tornado Warning	RNK	Campbell	39 min
May 10, 8:34 PM EDT	Tornado Warning	RNK	Campbell, Charlotte, Halifax	26 min
May 10, 8:45 PM EDT	Severe Thunderstorm Warning	RNK	Campbell, Charlotte, Halifax	60 min
May 10, 9:19 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	41 min
May 10, 9:37 PM EDT	Special Weather Statement	RNK	Appomattox, City of Lynchburg	53 min
May 10, 9:45 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Campbell, Charlotte, City of Lynchburg	60 min
May 10, 10:43 PM EDT	Special Weather Statement	RNK	Charlotte	62 min
May 10, 11:20 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte	16 min
May 11, 6:19 AM EDT	Flood Watch	RNK	Alleghany, Amherst, Bath, Bedford, Bland, Botetourt and 23 more	30 hr
May 11, 6:19 AM EDT	Flash Flood Watch	RNK	Alleghany, Bath, Bland, Botetourt, Craig, Giles and 5 more	16 hr
May 11, 6:08 PM EDT	Severe Thunderstorm Warning	RNK	Charlotte, Halifax	67 min
May 11, 6:38 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	67 min
May 11, 6:49 PM EDT	Special Weather Statement	RNK	Bedford	56 min
May 11, 7:15 PM EDT	Special Weather Statement	RNK	Patrick	60 min
May 11, 7:18 PM EDT	Severe Thunderstorm Warning	RNK	Patrick	57 min
May 11, 7:28 PM EDT	Severe Thunderstorm Warning	RNK	Henry, City of Martinsville	62 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.