Alert archive / North Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 52, NWS Blacksburg, VA

May 11, 2017Caswell County, Rockingham County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at May 11, 2017, 7:48 PM EDT for Caswell County, Rockingham County, North Carolina. It was in force for 57 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: May 11, 2017, 7:48 PM EDT (23:48 UTC)
Expired: May 11, 2017, 8:45 PM EDT
In force: 57 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Caswell County, NC, Rockingham County, NC

The radar

The Roanoke radar (KFCX), 98 km from the middle of the area, began a volume at 23:52 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 11, 7:55 PM EDT	TSTM WND DMG	4 Ssw Mayfield, NC	MULTIPLE TREES DOWN ON WORSHAM MILL RD
May 11, 7:55 PM EDT	TSTM WND DMG	6 Ssw Mayfield, NC	TREE DOWN NEAR BURTON RD AT ESTES RD. TIME RADAR ESTIMATED.

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, 11.8 hours before the alert went out and 45 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: 24 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 1391 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

452 
WUUS51 KRNK 112348
SVRRNK
NCC033-157-120045-
/O.NEW.KRNK.SV.W.0052.170511T2348Z-170512T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service BLACKSBURG VA
748 PM EDT THU MAY 11 2017

The National Weather Service in BLACKSBURG has issued a

* Severe Thunderstorm Warning for...
  Eastern Rockingham County in north central North Carolina...
  Western Caswell County in north central North Carolina...

* Until 845 PM EDT

* At 746 PM EDT, a severe thunderstorm was located over Lawsonville,
  moving southeast at 40 mph.

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

  SOURCE...Radar indicated. Henry County warning point had reported 
           multiple trees downed in southeastern Henry County. 

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

* Locations impacted include...
  Eden...
  Reidsville...
  Wentworth...
  Yanceyville...
  and Bethel.

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

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 3625 7964 3654 7980 3654 7950 3624 7917
TIME...MOT...LOC 2346Z 316DEG 37KT 3641 7961 

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

Loconto

2 follow-up statements

689 
WWUS51 KRNK 120009
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
809 PM EDT THU MAY 11 2017

NCC033-157-120045-
/O.CON.KRNK.SV.W.0052.000000T0000Z-170512T0045Z/
Rockingham NC-Caswell NC-
809 PM EDT THU MAY 11 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR
EASTERN ROCKINGHAM AND WESTERN CASWELL COUNTIES...

At 808 PM EDT, a severe thunderstorm was located near Camp Springs,
moving southeast at 40 mph.

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

SOURCE...Public. There have been multiple reports of trees downed in 
         the towns of Eden, Draper and Ruffin. 

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

Locations impacted include...
Eden...
Reidsville...
Wentworth...
Yanceyville...
and Bethel.

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

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 3625 7964 3654 7980 3654 7950 3624 7917
TIME...MOT...LOC 0008Z 311DEG 34KT 3633 7943 

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

Loconto

960 
WWUS51 KRNK 120040
SVSRNK

Severe Weather Statement
National Weather Service BLACKSBURG VA
840 PM EDT THU MAY 11 2017

NCC033-157-120050-
/O.EXP.KRNK.SV.W.0052.000000T0000Z-170512T0045Z/
Rockingham NC-Caswell NC-
840 PM EDT THU MAY 11 2017

...THE SEVERE THUNDERSTORM WARNING FOR 
EASTERN ROCKINGHAM AND WESTERN CASWELL COUNTIES WILL EXPIRE AT 845 PM
EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire at 845 PM.

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 3625 7964 3654 7980 3654 7950 3624 7917
TIME...MOT...LOC 0040Z 316DEG 37KT 3613 7920 

$$

Loconto

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 6:19 AM EDT	Flood Watch	RNK	Alleghany, Ashe, Surry, Watauga, Wilkes	30 hr
May 11, 7:15 PM EDT	Special Weather Statement	RNK	Stokes	60 min
May 11, 7:18 PM EDT	Severe Thunderstorm Warning	RNK	Stokes	57 min
May 11, 7:28 PM EDT	Severe Thunderstorm Warning	RNK	Rockingham	62 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.