Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 77, NWS Raleigh, NC

May 15, 2012Franklin County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 15, 2012, 7:42 PM EDT for Franklin County, North Carolina. It was in force for 48 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 15, 2012, 7:42 PM EDT (23:42 UTC)
Expired: May 15, 2012, 8:30 PM EDT
In force: 48 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

County Franklin County, NC

The radar

The Raleigh/Durham radar (KRAX), 53 km from the middle of the area, began a volume at 23:45 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 15, 7:50 PM EDT	TSTM WND GST 60	6 Ssw Louisburg, NC	A FRANKLIN COUNTY AIRPORT EMPLOYEE REPORTS THAT A STRONG THUNDERSTORM WIND GUST...ESTIMATED UP TO 60 MPH...BLEW A PARKED AIRCRAFT OFF ITS PAD AND DISPLACED IT SEVERAL FEET AWAY. THE AIRCRAFT LANDED UPRIGHT AND NO DAMAGE WAS NOTED TO IT.
May 15, 7:59 PM EDT	HAIL 0.75	2 Sse Louisburg, NC	DIME SIZED HAIL NEAR ROYAL

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 15, 3:13 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.7 hours before the alert went out and 147 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: -114 J/kg
Mixed-layer LCL: 532 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 55 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.

898 
WUUS52 KRAH 152342
SVRRAH
NCC069-160030-
/O.NEW.KRAH.SV.W.0077.120515T2342Z-120516T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
742 PM EDT TUE MAY 15 2012

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FRANKLIN COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 830 PM EDT

* AT 741 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTHWEST OF BUNN...OR 7 MILES SOUTH OF
  LOUISBURG...MOVING NORTHEAST AT 20 MPH. QUARTER SIZED HAIL AND
  WINDS IN EXCESS OF 58 MPH ARE LIKELY WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  LOUISBURG...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LARGE HAIL WILL DAMAGE VEHICLES...WINDOWS AND SOME ROOFS. SEVERE
WINDS WILL BLOW DOWN TREES...POWER LINES...AND CAN DAMAGE MOBILE
HOMES AND OTHER BUILDINGS. SEEK SHELTER IN A STURDY STRUCTURE UNTIL
THE STORM HAS PASSED. STAY AWAY FROM WINDOWS.

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING...1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW
ENFORCEMENT AGENCY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR CENTRAL NORTH CAROLINA.

&&

LAT...LON 3625 7814 3621 7811 3621 7805 3620 7801
      3599 7815 3589 7830 3591 7835 3593 7835
      3594 7839 3598 7844 3600 7849 3624 7836
      3623 7834 3627 7830
TIME...MOT...LOC 2342Z 222DEG 16KT 3600 7834

$$

22

3 follow-up statements

744 
WWUS52 KRAH 152353
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
753 PM EDT TUE MAY 15 2012

NCC069-160030-
/O.CON.KRAH.SV.W.0077.000000T0000Z-120516T0030Z/
FRANKLIN NC-
753 PM EDT TUE MAY 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR FRANKLIN COUNTY...

AT 750 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR
LOUISBURG...MOVING NORTHEAST AT 20 MPH.

HAZARDS IN THE WARNING INCLUDE...
QUARTER SIZED HAIL.
DAMAGING WINDS IN EXCESS OF 58 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE... LOUISBURG...INGLESIDE 
AND CENTERVILLE.

WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY 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 7 7...6 3 3...6 7 7 2.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR CENTRAL NORTH CAROLINA.

LAT...LON 3625 7814 3621 7811 3621 7805 3620 7801
      3599 7815 3589 7830 3591 7835 3593 7835
      3594 7839 3598 7844 3600 7849 3624 7836
      3623 7834 3627 7830
TIME...MOT...LOC 2352Z 216DEG 18KT 3605 7830

$$

22

379 
WWUS52 KRAH 160003
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
803 PM EDT TUE MAY 15 2012

NCC069-160030-
/O.CON.KRAH.SV.W.0077.000000T0000Z-120516T0030Z/
FRANKLIN NC-
803 PM EDT TUE MAY 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR FRANKLIN COUNTY...

AT 759 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR
LOUISBURG...MOVING NORTHEAST AT 20 MPH.

HAZARDS IN THE WARNING INCLUDE...
QUARTER SIZED HAIL.
DAMAGING WINDS IN EXCESS OF 58 MPH.

LOCATIONS IN THE PATH OF THE STORM INCLUDE... LOUISBURG...INGLESIDE 
AND CENTERVILLE.

WHEN IT IS SAFE TO DO SO...PLEASE CALL IN YOUR REPORTS OF PENNY 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 7 7...6 3 3...6 7 7 2.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR CENTRAL NORTH CAROLINA.

LAT...LON 3625 7814 3621 7811 3621 7805 3620 7801
      3599 7815 3589 7830 3591 7835 3593 7835
      3594 7839 3598 7844 3600 7849 3624 7836
      3623 7834 3627 7830
TIME...MOT...LOC 0003Z 219DEG 16KT 3608 7826

$$

22

741 
WWUS52 KRAH 160026
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
826 PM EDT TUE MAY 15 2012

NCC069-160036-
/O.EXP.KRAH.SV.W.0077.000000T0000Z-120516T0030Z/
FRANKLIN NC-
826 PM EDT TUE MAY 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR FRANKLIN COUNTY EXPIRES AT 830
PM EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND THE WARNING 
WILL BE ALLOWED TO EXPIRE.

IF YOU OBSERVED SEVERE WEATHER INCLUDING DAMAGING WINDS OR LARGE
HAIL...PLEASE CONTACT THE NATIONAL WEATHER SERVICE BY CALLING TOLL
FREE 1...8 7 7...6 3 3...6 7 7 2...OR NOTIFY YOUR NEAREST LAW
ENFORCEMENT AGENCY AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL
WEATHER SERVICE FORECAST OFFICE IN RALEIGH.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR CENTRAL NORTH CAROLINA.

LAT...LON 3625 7814 3621 7811 3621 7805 3620 7801
      3599 7815 3589 7830 3591 7835 3593 7835
      3594 7839 3598 7844 3600 7849 3624 7836
      3623 7834 3627 7830
TIME...MOT...LOC 0026Z 219DEG 16KT 3616 7818

$$

22

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 14, 8:00 PM EDT	Areal Flood Warning	RAH	Forsyth	14 hr
May 14, 8:45 PM EDT	Flash Flood Warning	RAH	Davidson, Forsyth	3 hr
May 14, 8:59 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth, Guilford, Randolph	76 min
May 14, 10:48 PM EDT	Special Weather Statement	RAH	Anson, Montgomery, Moore, Stanly	57 min
May 14, 11:41 PM EDT	Areal Flood Advisory	RAH	Chatham, Randolph	72 min
May 15, 2:35 AM EDT	River Flood Warning	RAH	Davidson, Davie	30 hr
May 15, 2:44 PM EDT	Special Weather Statement	RAH	Wayne	46 min
May 15, 2:57 PM EDT	Flash Flood Watch	RAH	Davidson, Forsyth, Guilford	7 hr
May 15, 2:59 PM EDT	Special Weather Statement	RAH	Wayne	61 min
May 15, 3:45 PM EDT	Special Weather Statement	RAH	Wayne	60 min
May 15, 4:08 PM EDT	Special Weather Statement	RAH	Sampson	67 min
May 15, 4:44 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Wayne	46 min
May 15, 5:25 PM EDT	Special Weather Statement	RAH	Johnston, Wayne	65 min
May 15, 5:38 PM EDT	Severe Thunderstorm Warning	RAH	Nash, Wilson	52 min
May 15, 6:29 PM EDT	Special Weather Statement	RAH	Edgecombe	46 min
May 15, 6:35 PM EDT	Special Weather Statement	RAH	Johnston	40 min
May 15, 7:25 PM EDT	Special Weather Statement	RAH	Franklin	65 min

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.