Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 252, NWS Norman, OK

May 21, 2000Beckham County, Roger Mills County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 21, 2000, 9:59 PM CDT for Beckham County, Roger Mills County, Oklahoma. It was in force for 46 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: May 21, 2000, 9:59 PM CDT (02:59 UTC)
Expired: May 21, 2000, 10:45 PM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Whole counties

Counties Beckham County, OK, Roger Mills County, OK

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 3.0 hours before the alert went out and 184 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: 802 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 2880 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOUN 220300
SVROKC
OKC009-129-149-220345-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
959 PM CDT SUN MAY 21 2000

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEAST BECKHAM COUNTY IN WESTERN OKLAHOMA
  SOUTHERN ROGER MILLS COUNTY IN WESTERN OKLAHOMA
  WESTERN WASHITA COUNTY IN WESTERN OKLAHOMA

* UNTIL 1045 PM CDT

* AT 959 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9
  MILES NORTHWEST OF ELK CITY...MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE ELK CITY

HAIL UP TO THE SIZE OF QUARTERS AND WIND GUSTS TO AT LEAST 60 MPH 
ARE LIKELY.

LAT...LON 3552 9967 3529 9948 3528 9923 3561 9942

30

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	45 min
May 21, 9:29 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	31 min
May 21, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Washita	46 min
May 21, 10:53 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	37 min
May 21, 11:18 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	42 min
May 22, 12:01 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma	44 min
May 22, 12:01 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Pottawatomie	44 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2000 Every severe thunderstorm warning in 2000

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.