Alert archive / North Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 41, NWS Blacksburg, VA

May 9, 20174 counties in North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at May 9, 2017, 6:36 PM EDT for 4 counties in North Carolina. It was in force for 54 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: May 9, 2017, 6:36 PM EDT (22:36 UTC)
Expired: May 9, 2017, 7:30 PM EDT
In force: 54 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alleghany County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC

The radar

The Roanoke radar (KFCX), 105 km from the middle of the area, began a volume at 22:39 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
May 9, 7:05 PM EDT	TSTM WND DMG	2 Sse Elkin, NC	TREES DOWN ON EAST END BOULEVARD IN JONESVILLE.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.6 hours before the alert went out and 77 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1227 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

932 
WUUS51 KRNK 092236
SVRRNK
NCC005-171-193-197-092330-
/O.NEW.KRNK.SV.W.0041.170509T2236Z-170509T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
636 PM EDT TUE MAY 9 2017

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Southeastern Alleghany County in northwestern North Carolina...
  Southwestern Surry County in northwestern North Carolina...
  Northeastern Wilkes County in northwestern North Carolina...
  Yadkin County in northwestern North Carolina...

* Until 730 PM EDT

* At 635 PM EDT, a severe thunderstorm was located over Abshers,
  moving southeast at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines. 

* Locations impacted include...
  Elkin...
  Yadkinville...
  Jonesville...
  Boonville...
  and Ronda.

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.

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 3606 8096 3633 8123 3647 8108 3614 8044
      3612 8046 3611 8050 3608 8052 3605 8062
TIME...MOT...LOC 2235Z 310DEG 31KT 3635 8109 

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

JH

2 follow-up statements

720 
WWUS51 KRNK 092253
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
653 PM EDT TUE MAY 9 2017

NCC005-171-193-197-092330-
/O.CON.KRNK.SV.W.0041.000000T0000Z-170509T2330Z/
Alleghany NC-Surry NC-Wilkes NC-Yadkin NC-
653 PM EDT TUE MAY 9 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR
SOUTHEASTERN ALLEGHANY...SOUTHWESTERN SURRY...NORTHEASTERN WILKES AND
YADKIN COUNTIES IN NORTHWESTERN NORTH CAROLINA...

At 652 PM EDT, a severe thunderstorm was located over Ronda, moving
southeast at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         trees and power lines. 

Locations impacted include...
Elkin...
Yadkinville...
Jonesville...
Boonville...
and Ronda.

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.

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 3606 8096 3633 8123 3647 8108 3614 8044
      3612 8046 3611 8050 3608 8052 3605 8062
TIME...MOT...LOC 2252Z 310DEG 31KT 3625 8095 

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

JH

827 
WWUS51 KRNK 092325
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
725 PM EDT TUE MAY 9 2017

NCC005-171-193-197-092335-
/O.EXP.KRNK.SV.W.0041.000000T0000Z-170509T2330Z/
Alleghany NC-Surry NC-Wilkes NC-Yadkin NC-
725 PM EDT TUE MAY 9 2017

...THE SEVERE THUNDERSTORM WARNING FOR 
SOUTHEASTERN ALLEGHANY...SOUTHWESTERN SURRY...NORTHEASTERN WILKES AND
YADKIN COUNTIES IN NORTHWESTERN NORTH CAROLINA WILL EXPIRE AT 730 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 gusty 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.

LAT...LON 3606 8096 3633 8123 3647 8108 3614 8044
      3612 8046 3611 8050 3608 8052 3605 8062
TIME...MOT...LOC 2325Z 310DEG 31KT 3610 8074 

$$

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 6:10 PM EDT	Special Weather Statement	RNK	Ashe	65 min
May 9, 6:15 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Ashe	60 min
May 9, 7:16 PM EDT	Special Weather Statement	RNK	Ashe	59 min
May 9, 7:50 PM EDT	Special Weather Statement	RNK	Wilkes	40 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2017 Every severe thunderstorm warning 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.