Alert archive / Oklahoma / Tornado Warnings in 2000

Tornado Warning 20, NWS Norman, OK

April 15, 2000Roger Mills County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 15, 2000, 4:39 PM CDT for Roger Mills County, Oklahoma. It was in force for 36 min. 3 reports came from 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, with what was reported inside it.

The facts

Issued: Apr 15, 2000, 4:39 PM CDT (21:39 UTC)
Expired: Apr 15, 2000, 5:15 PM CDT
In force: 36 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Roger Mills County, OK

What was reported inside it

Time	Report	Where
Apr 15, 4:55 PM CDT	Hail 1	Cheyenne, OK
Apr 15, 5:15 PM CDT	Hail 1	Strong City, OK
Apr 15, 5:20 PM CDT	Hail 1.75	Strong City, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 15, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.7 hours before the alert went out and 183 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: 110 J/kg
Mixed-layer CIN: -475 J/kg
Mixed-layer LCL: 1871 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 83 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.

317 
WFUS54 KOUN 152140
TOROKC
OKC129-152215-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
439 PM CDT SAT APR 15 2000

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  ROGER MILLS COUNTY IN WESTERN OKLAHOMA

* UNTIL 515 PM CDT

* AT 439 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM  
CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS PORTION OF THE  
STORM WAS LOCATED 9 MILES SOUTHWEST OF CHEYENNE...MOVING NORTHEAST 
AT 35 MPH. 

* LOCATIONS IN THE WARNING INCLUDE CHEYENNE AND STRONG CITY

TAKE COVER NOW. ABANDON MOBILE HOMES AND VEHICLES. MOVE TO AN
INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM WINDOWS.

LAT...LON 3556 9990 3544 9982 3557 9942 3582 9963
CJS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 4:13 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	62 min
Apr 15, 4:44 PM CDT	Severe Thunderstorm Warning	OUN	Harmon	46 min
Apr 15, 5:03 PM CDT	Severe Thunderstorm Warning	OUN	Greer	57 min
Apr 15, 5:12 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	48 min
Apr 15, 5:30 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey	60 min
Apr 15, 5:38 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	52 min
Apr 15, 5:55 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Kiowa	50 min
Apr 15, 6:24 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	51 min
Apr 15, 6:27 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey	63 min
Apr 15, 6:39 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Tillman	66 min
Apr 15, 6:42 PM CDT	Severe Thunderstorm Warning	OUN	Major	63 min
Apr 15, 6:59 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	61 min

Nearby

Tornado Warnings in Oklahoma, 2000 Every tornado warning in 2000 Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.