Alert archive / Virginia / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 252, NWS Blacksburg, VA

August 31, 20164 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Aug 31, 2016, 5:13 PM EDT for 4 counties in Virginia. It was in force for 47 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: Aug 31, 2016, 5:13 PM EDT (21:13 UTC)
Expired: Aug 31, 2016, 6:00 PM EDT
In force: 47 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties City of Roanoke, VA, City of Salem, VA, Montgomery County, VA, Roanoke County, VA

The radar

The Roanoke radar (KFCX), 33 km from the middle of the area, began a volume at 21:15 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
Aug 31, 5:13 PM EDT	HAIL 1	2 Ssw Glenvar, VA	ONGOING AT THE TIME IT WAS CALLED IN.

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, 9.2 hours before the alert went out and 47 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: 112 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 837 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

349 
WUUS51 KRNK 312113
SVRRNK
VAC121-161-770-775-312200-
/O.NEW.KRNK.SV.W.0252.160831T2113Z-160831T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
513 PM EDT WED AUG 31 2016

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  THE CITY OF SALEM IN WEST CENTRAL VIRGINIA...
  ROANOKE COUNTY IN WEST CENTRAL VIRGINIA...
  EAST CENTRAL MONTGOMERY COUNTY IN SOUTHWESTERN VIRGINIA...
  THE CITY OF ROANOKE IN WEST CENTRAL VIRGINIA...

* UNTIL 600 PM EDT

* AT 513 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER GLENVAR...
  MOVING NORTHEAST AT 15 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  ROANOKE...
  SALEM...
  VINTON...
  CATAWBA...
  AND BENT MOUNTAIN.

THIS INCLUDES THE FOLLOWING LOCATIONS THE SALEM FAIRGROUNDS AND
ROANOKE REGIONAL AIRPORT.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS!

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 3741 8006 3738 7999 3727 7985 3723 7984
      3722 7985 3722 7987 3717 8000 3717 8003
      3716 8008 3716 8009 3713 8012 3711 8017
      3726 8029 3742 8007
TIME...MOT...LOC 2113Z 238DEG 14KT 3723 8015 

HAIL...1.00IN
WIND...60MPH
 
$$

JR

2 follow-up statements

600 
WWUS51 KRNK 312128
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
528 PM EDT WED AUG 31 2016

VAC121-312135-
/O.CAN.KRNK.SV.W.0252.000000T0000Z-160831T2200Z/
MONTGOMERY VA-
528 PM EDT WED AUG 31 2016

...THE SEVERE THUNDERSTORM WARNING FOR 
EAST CENTRAL MONTGOMERY COUNTY IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED
EAST OF THE AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

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 3741 8006 3738 7999 3727 7985 3723 7984
      3717 8000 3717 8003 3716 8009 3713 8012
      3711 8017 3712 8018 3713 8018 3723 8019
      3729 8024 3742 8007
TIME...MOT...LOC 2125Z 238DEG 14KT 3726 8010 

$$

VAC161-770-775-312200-
/O.CON.KRNK.SV.W.0252.000000T0000Z-160831T2200Z/
CITY OF SALEM VA-ROANOKE VA-CITY OF ROANOKE VA-
528 PM EDT WED AUG 31 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR
ROANOKE ...THE CITY OF SALEM AND THE CITY OF ROANOKE...

AT 525 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER SALEM...MOVING
NORTHEAST AT 15 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
ROANOKE...
SALEM...
VINTON...
BENT MOUNTAIN...
AND CATAWBA.

THIS INCLUDES THE FOLLOWING LOCATIONS THE SALEM FAIRGROUNDS AND
ROANOKE REGIONAL AIRPORT.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. FOR YOUR
SAFETY...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY
BUILDING. STAY AWAY FROM WINDOWS.

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

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 3741 8006 3738 7999 3727 7985 3723 7984
      3717 8000 3717 8003 3716 8009 3713 8012
      3711 8017 3712 8018 3713 8018 3723 8019
      3729 8024 3742 8007
TIME...MOT...LOC 2125Z 238DEG 14KT 3726 8010 

HAIL...1.00IN
WIND...60MPH
 
$$

JR

802 
WWUS51 KRNK 312153
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
553 PM EDT WED AUG 31 2016

VAC161-770-775-312203-
/O.EXP.KRNK.SV.W.0252.000000T0000Z-160831T2200Z/
CITY OF SALEM VA-ROANOKE VA-CITY OF ROANOKE VA-
553 PM EDT WED AUG 31 2016

...THE SEVERE THUNDERSTORM WARNING FOR ROANOKE ...THE CITY OF SALEM
AND THE CITY OF ROANOKE WILL EXPIRE AT 600 PM EDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER HEAVY RAIN
IS 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.

LAT...LON 3741 8006 3738 7999 3727 7985 3723 7984
      3717 8000 3717 8003 3716 8009 3713 8012
      3711 8017 3712 8018 3713 8018 3723 8019
      3729 8024 3742 8007
TIME...MOT...LOC 2153Z 238DEG 14KT 3732 7999 

$$

RAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 5:06 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	24 min
Aug 31, 5:32 PM EDT	Special Weather Statement	RNK	City of Lynchburg	58 min
Aug 31, 5:52 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Franklin	53 min
Aug 31, 7:43 PM EDT	Special Weather Statement	RNK	Botetourt, Craig, Roanoke	62 min
Aug 31, 7:46 PM EDT	Special Weather Statement	RNK	Wythe	59 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2016 Every severe thunderstorm warning in 2016

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.