Alert archive / Oklahoma / Tornado Warnings in 1990

Tornado Warning 13, NWS Norman, OK

March 13, 1990Garvin County, McClain County, Oklahoma

NWS Norman, OK issued this tornado warning at Mar 13, 1990, 8:42 PM CST for Garvin County, McClain County, Oklahoma. It was in force for 48 min. 1 report 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, 8:42 PM CST (02:42 UTC)
Expired
Mar 13, 1990, 9:30 PM CST
In force
48 min
Issued by
NWS Norman, OK
Area
Whole counties

Counties Garvin County, OK, 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

TimeReportWhereRemark
Mar 13, 8:46 PM CSTHail 1.75Mcclain, 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 00:00Z, 2.7 hours before the alert went out and 40 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 1990-03-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1624 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 1990-03-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
1624 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
695 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 140244
TOROKC
OKC087-125-049-140330-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
842 PM CST TUE MAR 13 1990
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HA

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 13, 6:01 PM CSTTornado WarningOUNJefferson, Stephens29 min
Mar 13, 6:23 PM CSTTornado WarningOUNLincoln, Pottawatomie37 min
Mar 13, 6:26 PM CSTTornado WarningOUNJefferson, Stephens34 min
Mar 13, 6:45 PM CSTSevere Thunderstorm WarningOUNCotton, Stephens60 min
Mar 13, 6:57 PM CSTTornado WarningOUNJefferson, Stephens33 min
Mar 13, 7:04 PM CSTSevere Thunderstorm WarningOUNPottawatomie, Seminole41 min
Mar 13, 7:04 PM CSTSevere Thunderstorm WarningOUNLincoln41 min
Mar 13, 7:10 PM CSTSevere Thunderstorm WarningOUNCarter, Garvin, Murray65 min
Mar 13, 7:18 PM CSTSevere Thunderstorm WarningOUNLincoln, Oklahoma57 min
Mar 13, 7:31 PM CSTTornado WarningOUNCarter29 min
Mar 13, 7:34 PM CSTSevere Thunderstorm WarningOUNComanche, Cotton, Stephens56 min
Mar 13, 7:52 PM CSTTornado WarningOUNGarvin38 min
Mar 13, 8:18 PM CSTTornado WarningOUNGarvin42 min
Mar 13, 8:42 PM CSTTornado WarningOUNPottawatomie48 min
Mar 13, 8:53 PM CSTSevere Thunderstorm WarningOUNJackson, Kiowa, Tillman67 min
Mar 13, 9:20 PM CSTSevere Thunderstorm WarningOUNPontotoc, Pottawatomie, Seminole55 min
Mar 13, 9:36 PM CSTSevere Thunderstorm WarningOUNCaddo, Kiowa, Washita69 min
Mar 13, 9:48 PM CSTSevere Thunderstorm WarningOUNHughes57 min
Mar 13, 10:26 PM CSTSevere Thunderstorm WarningOUNBlaine, Garfield, Kingfisher, Major64 min
Mar 13, 10:26 PM CSTSevere Thunderstorm WarningOUNCuster64 min
Mar 13, 10:26 PM CSTSevere Thunderstorm WarningOUNGrant64 min
Mar 13, 11:43 PM CSTSevere Thunderstorm WarningOUNGarfield, Noble47 min
Mar 14, 12:52 AM CSTSevere Thunderstorm WarningOUNJackson53 min
Mar 14, 1:38 AM CSTSevere Thunderstorm WarningOUNLogan37 min
Mar 14, 2:00 AM CSTSevere Thunderstorm WarningOUNPayne30 min
Mar 14, 2:34 AM CSTSevere Thunderstorm WarningOUNCanadian, Grady26 min
Mar 14, 4:50 AM CSTSevere Thunderstorm WarningOUNCoal, Pontotoc35 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.