Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 21, NWS Norman, OK

February 24, 2001Coal County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Feb 24, 2001, 9:46 AM CST for Coal County, Oklahoma. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Feb 24, 2001, 9:46 AM CST (15:46 UTC)
Expired: Feb 24, 2001, 10:30 AM CST
In force: 44 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Coal County, OK

The radar

The Norman radar (KTLX), 122 km from the middle of the area, began a volume at 15:48 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 watch it was issued in

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

Issued	Product	Office	Lasted
Feb 24, 7:15 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 3.8 hours before the alert went out and 123 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: 170 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 452 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 544 m²/s²
0-3 km storm-relative helicity: 578 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

Open this sounding in Storm Lab

The text

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

783 
WUUS54 KOUN 241547
SVROKC
OKC029-241630-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
946 AM CST SAT FEB 24 2001

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COAL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 1030 AM CST

* AT 943 AM CST...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 4
  MILES SOUTHEAST OF CENTRAHOMA...MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE CENTRAHOMA...COALGATE AND PHILLIPS

HAIL UP TO THE SIZE OF QUARTERS AND 60 MPH ARE LIKELY WITH THIS 
SEVERE THUNDERSTORM.

LAT...LON 3459 9642 3447 9626 3460 9611 3474 9611
          3475 9624
CJS

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 24, 2:10 AM CST	Severe Thunderstorm Warning	OUN	Harmon	50 min
Feb 24, 2:10 AM CST	Severe Thunderstorm Warning	OUN	Greer	50 min
Feb 24, 3:53 AM CST	Severe Thunderstorm Warning	OUN	Jackson	52 min
Feb 24, 5:12 AM CST	Severe Thunderstorm Warning	OUN	Kay, Noble	48 min
Feb 24, 9:28 AM CST	Severe Thunderstorm Warning	OUN	Lincoln	47 min
Feb 24, 10:01 AM CST	Severe Thunderstorm Warning	OUN	Love, Marshall	44 min
Feb 24, 10:18 AM CST	Severe Thunderstorm Warning	OUN	Johnston, Pontotoc	42 min
Feb 24, 10:49 AM CST	Severe Thunderstorm Warning	OUN	Bryan, Marshall	41 min
Feb 24, 10:57 AM CST	Severe Thunderstorm Warning	OUN	Atoka, Coal	48 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every severe thunderstorm warning 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.