Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 35, NWS Raleigh, NC

March 24, 2012Durham County, Orange County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Mar 24, 2012, 6:52 PM EDT for Durham County, Orange County, North Carolina. It was in force for 38 min. 3 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 24, 2012, 6:52 PM EDT (22:52 UTC)
Expired: Mar 24, 2012, 7:30 PM EDT
In force: 38 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Durham County, NC, Orange County, NC

The radar

The Raleigh/Durham radar (KRAX), 55 km from the middle of the area, began a volume at 22:56 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 24, 7:15 PM EDT	HAIL 1	1 Ese Hillsborough, NC	911 CENTER REPORTS QUARTER SIZE HAIL IN HILLSBOROUGH ON MEADOWLANDS DRIVE AND ROUTE 70A
Mar 24, 7:18 PM EDT	HAIL 1	2 Se Hillsborough, NC	COCORAHS REPORT OF HAIL UP TO THE SIZE OF QUARTERS. HAIL COVERING THE GROUND.
Mar 24, 7:20 PM EDT	HAIL 1	Hillsborough, NC	QUARTER SIZED HAIL IN HILLSBOROUGH

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
Mar 24, 12:46 PM EDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 24, 3:38 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.9 hours before the alert went out and 90 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: 226 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 526 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

267 
WUUS52 KRAH 242252
SVRRAH
NCC063-135-242330-
/O.NEW.KRAH.SV.W.0035.120324T2252Z-120324T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
652 PM EDT SAT MAR 24 2012

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DURHAM COUNTY IN CENTRAL NORTH CAROLINA
  ORANGE COUNTY IN CENTRAL NORTH CAROLINA

* UNTIL 730 PM EDT

* AT 647 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER PARKWOOD...OR OVER DURHAM...MOVING NORTH
  AT 25 MPH. QUARTER SIZED HAIL AND WINDS IN EXCESS OF 58 MPH ARE
  LIKELY WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  BAHAMA...
  ROUGEMONT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS PRODUCING LARGE HAIL CAPABLE OF BREAKING WINDOWS...
DAMAGING ROOFS AND DENTING VEHICLES. STAY INSIDE AWAY FROM WINDOWS
UNTIL THE STORM HAS PASSED.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.

&&

LAT...LON 3624 7880 3609 7881 3607 7879 3607 7875
      3603 7875 3603 7874 3592 7876 3593 7880
      3587 7883 3587 7886 3586 7912 3588 7925
      3607 7926 3625 7925
TIME...MOT...LOC 2252Z 177DEG 21KT 3596 7893

$$

22

2 follow-up statements

609 
WWUS52 KRAH 242256
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
656 PM EDT SAT MAR 24 2012

NCC063-135-242330-
/O.CON.KRAH.SV.W.0035.000000T0000Z-120324T2330Z/
DURHAM NC-ORANGE NC-
656 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR ORANGE AND DURHAM COUNTIES...

AT 651 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR 
DURHAM...MOVING NORTH AT 25 MPH.  A SECOND STORM WAS LOCATED OVER 
SOUTHERN ORANGE COUNTY NEAR CARRBORO...ALSO MOVING TO THE NORTH AT 
25 MPH.

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

LOCATIONS IN THE PATH OF THE STORM INCLUDE... 
CARRBORO...GORMAN...EFLAND...HILLSBOROUGH...SCHLEY...BAHAMA...
ROUGEMONT AND DURHAM.

THIS INCLUDES INTERSTATE 40 BETWEEN EXITS 157 AND 283.

THIS INCLUDES INTERSTATE 85 BETWEEN EXITS 164 AND 183.

THIS INCLUDES THE DURHAM FREEWAY BETWEEN EXITS 5 AND 16.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.

LAT...LON 3624 7880 3609 7881 3607 7879 3607 7875
      3603 7875 3603 7874 3592 7876 3593 7880
      3587 7883 3587 7886 3586 7912 3588 7925
      3607 7926 3625 7925
TIME...MOT...LOC 2254Z 177DEG 21KT 3597 7893

$$

22

407 
WWUS52 KRAH 242310
SVSRAH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
710 PM EDT SAT MAR 24 2012

NCC063-135-242330-
/O.CON.KRAH.SV.W.0035.000000T0000Z-120324T2330Z/
DURHAM NC-ORANGE NC-
710 PM EDT SAT MAR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR ORANGE AND DURHAM COUNTIES...

AT 705 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR 
GORMAN...OR NEAR DURHAM...MOVING NORTH AT 30 MPH.  A SECOND STORM 
WAS LOCATED BETWEEN CHAPEL HILL AND HILLSBOROUGH.

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

LOCATIONS IN THE PATH OF THE STORM INCLUDE... HILLSBOROUGH...
SCHLEY...BAHAMA...ROUGEMONT AND CARR.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR CENTRAL NORTH CAROLINA.

LAT...LON 3624 7880 3609 7881 3607 7879 3607 7875
      3603 7875 3603 7874 3592 7876 3593 7880
      3587 7883 3587 7886 3586 7912 3588 7925
      3607 7926 3625 7925
TIME...MOT...LOC 2307Z 180DEG 26KT 3606 7889

$$

22

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 24, 12:32 AM EDT	Special Weather Statement	RAH	Wake	43 min
Mar 24, 1:08 PM EDT	Special Weather Statement	RAH	Sampson	52 min
Mar 24, 2:43 PM EDT	Special Weather Statement	RAH	Edgecombe, Halifax, Johnston, Nash, Wayne, Wilson	47 min
Mar 24, 3:17 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Wilson	43 min
Mar 24, 3:43 PM EDT	Special Weather Statement	RAH	Wayne	62 min
Mar 24, 3:53 PM EDT	Special Weather Statement	RAH	Sampson	67 min
Mar 24, 4:04 PM EDT	Special Weather Statement	RAH	Edgecombe	56 min
Mar 24, 4:12 PM EDT	Special Weather Statement	RAH	Sampson	63 min
Mar 24, 4:14 PM EDT	Severe Thunderstorm Warning	RAH	Wayne	46 min
Mar 24, 4:35 PM EDT	Severe Thunderstorm Warning	RAH	Sampson, Wayne	40 min
Mar 24, 4:36 PM EDT	Severe Thunderstorm Warning	RAH	Forsyth	39 min
Mar 24, 4:40 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth	95 min
Mar 24, 5:16 PM EDT	Severe Thunderstorm Warning	RAH	Davidson	59 min
Mar 24, 5:24 PM EDT	Special Weather Statement	RAH	Cumberland, Harnett, Johnston, Sampson, Wayne	81 min
Mar 24, 5:33 PM EDT	Severe Thunderstorm Warning	RAH	Guilford	87 min
Mar 24, 5:37 PM EDT	Severe Thunderstorm Warning	RAH	Sampson, Wayne	53 min
Mar 24, 5:52 PM EDT	Severe Thunderstorm Warning	RAH	Guilford, Randolph	83 min
Mar 24, 5:58 PM EDT	Severe Thunderstorm Warning	RAH	Montgomery, Stanly	62 min
Mar 24, 6:01 PM EDT	Severe Thunderstorm Warning	RAH	Davidson	59 min
Mar 24, 6:23 PM EDT	Special Weather Statement	RAH	Wake	52 min
Mar 24, 6:23 PM EDT	Severe Thunderstorm Warning	RAH	Randolph	97 min
Mar 24, 6:24 PM EDT	Severe Thunderstorm Warning	RAH	Anson	51 min
Mar 24, 6:37 PM EDT	Special Weather Statement	RAH	Wayne	53 min
Mar 24, 6:51 PM EDT	Severe Thunderstorm Warning	RAH	Alamance	84 min
Mar 24, 7:14 PM EDT	Severe Thunderstorm Warning	RAH	Guilford, Randolph	61 min
Mar 24, 7:17 PM EDT	Areal Flood Advisory	RAH	Guilford, Randolph	2 hr
Mar 24, 7:24 PM EDT	Areal Flood Advisory	RAH	Wayne	2 hr
Mar 24, 7:25 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Orange, Person	65 min
Mar 24, 7:27 PM EDT	Special Weather Statement	RAH	Moore, Richmond	78 min
Mar 24, 7:42 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Chatham, Randolph	64 min
Mar 24, 7:58 PM EDT	Areal Flood Advisory	RAH	Alamance	2 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.