Alert archive / North Carolina / Tornado Warnings in 2001

Tornado Warning 5, NWS Raleigh, NC

August 11, 2001Durham County, Wake County, North Carolina

NWS Raleigh, NC issued this tornado warning at Aug 11, 2001, 7:10 PM EDT for Durham County, Wake County, North Carolina. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 11, 2001, 7:10 PM EDT (23:10 UTC)
Expired
Aug 11, 2001, 7:45 PM EDT
In force
35 min
Issued by
NWS Raleigh, NC
Area
Whole counties

Counties Durham County, NC, Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 37 km from the middle of the area, began a volume at 23:10 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.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.2 hours before the alert went out and 104 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2001-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 254 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2001-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
254 J/kg
Mixed-layer CIN
-283 J/kg
Mixed-layer LCL
1204 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
16 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.

570 
WFUS52 KRAH 112311
TORRAH
NCC063-183-112345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
710 PM EDT SAT AUG 11 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN DURHAM COUNTY IN NORTH CAROLINA
  NORTHWEST WAKE COUNTY IN NORTH CAROLINA

* UNTIL 745 PM EDT

* AT 710 PM EDT...SHERIFF DEPUTY REPORTED A TORNADO 4 MILES        
  NORTHEAST OF BETHESDA...OR ABOUT 7 MILES EAST OF DURHAM AT    
  LEESVILLE ROAD AND HIGHWAY 70 MOVING   EAST AT 10 MPH.

* THE TORNADO WILL BE NEAR...
   FALLS LAKE...PURNELL AT 745 PM EDT

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.

&

$$
WSS/PWB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 1:51 AM EDTFlash Flood WarningRAHWake3 hr

Nearby

Tornado Warnings in North Carolina, 2001Every tornado warning in 2001Tornadoes in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.