Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 521, NWS Norman, OK

August 25, 2001Dewey County, Major County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 25, 2001, 8:34 PM CDT for Dewey County, Major County, Oklahoma. It was in force for 41 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: Aug 25, 2001, 8:34 PM CDT (01:34 UTC)
Expired: Aug 25, 2001, 9:15 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Dewey County, OK, Major County, OK

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 1.6 hours before the alert went out and 124 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: 1818 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 2127 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 95 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.

885 
WUUS54 KOUN 260135
SVROKC
OKC043-093-260215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
834 PM CDT SAT AUG 25 2001

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DEWEY COUNTY IN NORTHWEST OKLAHOMA
  MAJOR COUNTY IN NORTHWEST OKLAHOMA

* UNTIL 915 PM CDT

* AT 834 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 4
  MILES NORTHWEST OF HUCMAC...MOVING NORTHEAST AT 5 MPH.

* LOCATIONS IN THE WARNING INCLUDE FAIRVIEW...HUCMAC...ORIENTA AND
  ORION

HAIL UP TO THE SIZE OF NICKELS IS LIKELY WITH THIS SEVERE 
THUNDERSTORM ALONG WITH WINDS TO 65 MPH.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

LAT...LON 3609 9897 3597 9882 3627 9838 3645 9860


PURPURA

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan	60 min
Aug 25, 7:39 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	66 min
Aug 25, 7:58 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	62 min
Aug 25, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Oklahoma	60 min
Aug 25, 9:01 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Pottawatomie	44 min
Aug 25, 9:27 PM CDT	Severe Thunderstorm Warning	OUN	Grady	63 min
Aug 25, 9:38 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	67 min
Aug 25, 9:52 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma	38 min
Aug 25, 10:06 PM CDT	Severe Thunderstorm Warning	OUN	McClain	54 min
Aug 25, 10:24 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland	66 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.