Alert archive / Oklahoma / Tornado Warnings in 1990
Tornado Warning 2, NWS Norman, OK
NWS Norman, OK issued this tornado warning at Mar 13, 1990, 5:13 PM CST for McClain County, Oklahoma. It was in force for 32 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 13, 1990, 5:13 PM CST (23:13 UTC)
- Expired
- Mar 13, 1990, 5:45 PM CST
- In force
- 32 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
County McClain County, OK
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 13, 5:20 PM CST | Hail 1 | Mcclain, OK | |
| Mar 13, 5:31 PM CST | Tornado F2 | Mcclain, OK | |
| Mar 13, 5:32 PM CST | Hail 0.75 | Mcclain, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.2 hours before the alert went out and 24 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.
- Mixed-layer CAPE
- 399 J/kg
- Mixed-layer CIN
- -236 J/kg
- Mixed-layer LCL
- 700 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOKC 132315 TOROKC OKC087-132345- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 513 PM CST TUE MAR 13 1990 THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 545 PM CST FOR THE FOLLOWING OKLAHOMA LOCATIONS... IN CENTRAL OKLAHOMA ...MCCLAIN COUNTY AT 513 PM RADAR INDICATED A TORNADO 5 MILES WEST OF PURCELL NEAR WASHINGTON MOVING EAST AT 20 MPH. PURCELL IS IN THE PATH OF THIS TORNADO. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 8:11 AM CST | Severe Thunderstorm Warning | OUN | Ellis | 49 min |
| Mar 13, 8:27 AM CST | Severe Thunderstorm Warning | OUN | Harper, Woodward | 63 min |
| Mar 13, 8:49 AM CST | Severe Thunderstorm Warning | OUN | Woods | 41 min |
| Mar 13, 2:38 PM CST | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 67 min |
| Mar 13, 3:15 PM CST | Severe Thunderstorm Warning | OUN | Caddo | 45 min |
| Mar 13, 3:32 PM CST | Severe Thunderstorm Warning | OUN | Canadian, Grady | 58 min |
| Mar 13, 3:42 PM CST | Severe Thunderstorm Warning | OUN | Comanche | 48 min |
| Mar 13, 3:57 PM CST | Severe Thunderstorm Warning | OUN | Logan, Oklahoma | 48 min |
| Mar 13, 4:00 PM CST | Severe Thunderstorm Warning | OUN | Caddo | 60 min |
| Mar 13, 4:27 PM CST | Severe Thunderstorm Warning | OUN | Blaine, Garfield, Kingfisher, Major | 63 min |
| Mar 13, 4:32 PM CST | Severe Thunderstorm Warning | OUN | Comanche, Grady, McClain | 58 min |
| Mar 13, 4:43 PM CST | Tornado Warning | OUN | McClain | 32 min |
| Mar 13, 5:06 PM CST | Severe Thunderstorm Warning | OUN | Cleveland | 54 min |
| Mar 13, 5:31 PM CST | Tornado Warning | OUN | McClain | 29 min |
| Mar 13, 5:32 PM CST | Tornado Warning | OUN | Grant | 43 min |
| Mar 13, 5:41 PM CST | Severe Thunderstorm Warning | OUN | Cotton | 49 min |
| Mar 13, 5:54 PM CST | Tornado Warning | OUN | Cleveland, Pottawatomie | 36 min |
| Mar 13, 5:57 PM CST | Severe Thunderstorm Warning | OUN | Cleveland | 33 min |
Nearby
Tornado Warnings in Oklahoma, 1990Every tornado warning in 1990Tornadoes in 1990
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.