Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 22, NWS Blacksburg, VA

March 15, 2012Watauga County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Mar 15, 2012, 5:15 PM EDT for Watauga County, North Carolina. It was in force for 45 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: Mar 15, 2012, 5:15 PM EDT (21:15 UTC)
Expired: Mar 15, 2012, 6:00 PM EDT
In force: 45 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

County Watauga County, NC

The radar

The Knoxville radar (KMRX), 144 km from the middle of the area, began a volume at 21:17 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
Mar 15, 5:19 PM EDT	HAIL 0.75	2 Ssw Foscoe, NC	HAIL FELL ALONG WALKERS GLEN WAY.
Mar 15, 5:40 PM EDT	HAIL 0.88	Foscoe, NC

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, 9.3 hours before the alert went out and 171 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: 3 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 2031 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

069 
WUUS51 KRNK 152115
SVRRNK
NCC189-152215-
/O.NEW.KRNK.SV.W.0022.120315T2115Z-120315T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
515 PM EDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN WATAUGA COUNTY IN NORTHWEST NORTH CAROLINA

* UNTIL 615 PM EDT.

* AT 510 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR SEVEN DEVILS...OR 6 MILES SOUTHEAST OF BEECH
  MOUNTAIN...AND MOVING SOUTHEAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FOSCOE...
  MOSES CONE MEMORIAL PARK...
  BLOWING ROCK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER.

REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...
DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY
HEAVY RAIN.

WHEN IT IS SAFE TO DO SO...PLEASE SEND YOUR REPORTS OF QUARTER OR
LARGER SIZED HAIL...AS WELL AS WIND DAMAGE...INCLUDING TREES OR LARGE
LIMBS DOWNED BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...
1...8 6 6...2 1 5...4 3 2 4.

&&

LAT...LON 3623 8180 3618 8168 3612 8159 3611 8181
      3613 8183 3616 8183 3619 8186 3619 8189
      3620 8189
TIME...MOT...LOC 2115Z 305DEG 12KT 3615 8178

$$

PH

2 follow-up statements

133 
WWUS51 KRNK 152140
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
540 PM EDT THU MAR 15 2012

NCC189-152215-
/O.CON.KRNK.SV.W.0022.000000T0000Z-120315T2215Z/
WATAUGA NC-
540 PM EDT THU MAR 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHWESTERN WATAUGA COUNTY...

AT 536 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL. THIS STORM WAS LOCATED NEAR BLOWING ROCK...MOVING SOUTHEAST AT 
15 MPH.

LOCATIONS IMPACTED INCLUDE...
  FOSCOE...
  BLOWING ROCK...
  SEVEN DEVILS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

INTENSE RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM.
TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1...8 6 6...2 1 5...4 3 2 4...WHEN YOU CAN
DO SO SAFELY. ONCE AGAIN THAT NUMBER IS 1...8 6 6...2 1 5...4 3 2 4.

&&

LAT...LON 3622 8180 3618 8168 3612 8159 3611 8181
      3613 8183 3616 8183 3619 8186 3619 8189
      3620 8189
TIME...MOT...LOC 2139Z 305DEG 12KT 3610 8170

$$

JH

510 
WWUS51 KRNK 152200
SVSRNK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BLACKSBURG VA
600 PM EDT THU MAR 15 2012

NCC189-152210-
/O.CAN.KRNK.SV.W.0022.000000T0000Z-120315T2215Z/
WATAUGA NC-
600 PM EDT THU MAR 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WATAUGA COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED AND
EXITED THE WARNED AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

TO REPORT SEVERE WEATHER...PLEASE CONTACT THE NATIONAL WEATHER
SERVICE IN BLACKSBURG AT...1 8 6 6...2 1 5...4 3 2 4.

LAT...LON 3622 8180 3618 8168 3612 8159 3611 8181
      3613 8183 3616 8183 3619 8186 3619 8189
      3620 8189
TIME...MOT...LOC 2200Z 305DEG 12KT 3606 8163

$$

PH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 12:29 PM EDT	Special Weather Statement	RNK	Watauga	61 min
Mar 15, 1:14 PM EDT	Special Weather Statement	RNK	Wilkes	61 min
Mar 15, 1:38 PM EDT	Special Weather Statement	RNK	Surry	67 min
Mar 15, 2:29 PM EDT	Special Weather Statement	RNK	Surry	61 min
Mar 15, 3:25 PM EDT	Special Weather Statement	RNK	Alleghany	65 min
Mar 15, 4:41 PM EDT	Special Weather Statement	RNK	Ashe	64 min
Mar 15, 4:45 PM EDT	Special Weather Statement	RNK	Watauga	60 min
Mar 15, 5:12 PM EDT	Special Weather Statement	RNK	Alleghany, Ashe	63 min
Mar 15, 5:38 PM EDT	Flash Flood Warning	RNK	Watauga	3 hr

Nearby

Severe Thunderstorm Warnings in North Carolina, 2012 Every severe thunderstorm warning in 2012

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.