Alert archive / Oklahoma / Tornado Warnings in 2000

Tornado Warning 17, NWS Norman, OK

March 26, 2000Seminole County, Oklahoma

NWS Norman, OK issued this tornado warning at Mar 26, 2000, 4:35 PM CST for Seminole County, Oklahoma. It was in force for 40 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: Mar 26, 2000, 4:35 PM CST (22:35 UTC)
Expired: Mar 26, 2000, 5:15 PM CST
In force: 40 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Seminole County, OK

What was reported inside it

Time	Report	Where	Remark
Mar 26, 5:15 PM CST	Hail 1.75	Cromwell, OK
Mar 26, 5:15 PM CST	Hail 1	Little, OK
Mar 26, 5:23 PM CST	Tornado F0	Cromwell, OK	This tornado developed 3 miles southwest of Cromwell and was observed by an off-duty National Weather Service meteorologist. The tornado was small and brief with no damage occurring.

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
Mar 26, 2:30 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.6 hours before the alert went out and 68 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: 739 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1455 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KOUN 262235
TOROKC
OKC133-262315-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
435 PM CST SUN MAR 26 2000

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN SEMINOLE COUNTY IN EAST CENTRAL OKLAHOMA

* UNTIL 515 PM CST

* AT 435 PM CST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM  
  CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS PORTION OF
  THE STORM WAS LOCATED 2 MILES NORTHWEST OF LITTLE...MOVING
  SOUTHEAST AT 35 MPH.

* LOCATIONS IN THE WARNING INCLUDE LITTLE AND SEMINOLE

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 3546 9672 3547 9683 3521 9668 3526 9643

SPEG/DLF

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 26, 3:27 PM CST	Severe Thunderstorm Warning	OUN	Lincoln	48 min
Mar 26, 4:12 PM CST	Severe Thunderstorm Warning	OUN	Lincoln, Pottawatomie	48 min
Mar 26, 4:12 PM CST	Severe Thunderstorm Warning	OUN	Seminole	48 min
Mar 26, 4:13 PM CST	Severe Thunderstorm Warning	OUN	Cleveland	47 min
Mar 26, 4:45 PM CST	Severe Thunderstorm Warning	OUN	Pottawatomie	45 min
Mar 26, 4:54 PM CST	Severe Thunderstorm Warning	OUN	Hughes	66 min
Mar 26, 5:10 PM CST	Tornado Warning	OUN	Hughes	50 min
Mar 26, 5:14 PM CST	Severe Thunderstorm Warning	OUN	Seminole	31 min
Mar 26, 5:17 PM CST	Severe Thunderstorm Warning	OUN	Pontotoc	28 min
Mar 26, 5:41 PM CST	Severe Thunderstorm Warning	OUN	Pontotoc	34 min
Mar 26, 5:43 PM CST	Severe Thunderstorm Warning	OUN	Seminole	47 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.