Alert archive / Oklahoma / Tornado Warnings in 1991

Tornado Warning 35, NWS Norman, OK

April 12, 1991Grant County, Oklahoma

NWS Norman, OK issued this tornado warning at Apr 12, 1991, 5:27 PM CDT for Grant County, Oklahoma. It was in force for 63 min. 2 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
Apr 12, 1991, 5:27 PM CDT (22:27 UTC)
Expired
Apr 12, 1991, 6:30 PM CDT
In force
63 min
Issued by
NWS Norman, OK
Area
Whole counties

County Grant County, OK

What was reported inside it

TimeReportWhereRemark
Apr 12, 5:27 PM CDTHail 2.5Grant, OK
Apr 12, 5:50 PM CDTHail 2Grant, 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

Dodge City, (KDDC), launched 12:00Z, 10.5 hours before the alert went out and 216 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, Dodge City, at 12:00Z on 1991-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1583 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, Dodge City, at 12:00Z on 1991-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 square meters per square second.1939587897Sfc1 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
1583 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
695 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 12, 3:11 PM CDT, 2 hours 16 minutes before
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Special weather statement, Apr 12, 3:16 PM CDT, 2 hours 11 minutes before
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Special weather statement, Apr 12, 3:59 PM CDT, 1 hour 28 minutes before
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Special weather statement, Apr 12, 4:57 PM CDT, 30 minutes before
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Local storm report, Apr 12, 5:08 PM CDT, 19 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
506 PM CDT FRI APR 12 1991

TIME(CDT)    COUNTY          REPORT

445 PM       ALFALFA         ONE INCH DIAMTER HAIL AT GOLTRY.
Local storm report, Apr 12, 5:21 PM CDT, 6 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
519 PM CDT FRI APR 12 1991

TIME(CDT)    COUNTY          REPORT

518 PM       KINGFISHER      TORNADO 5 SOUTH OF KINGFISHER AND TWO INCH
                             HAIL 1 SOUTH OF KINGFISHER...FROM COUNTY
                             CIVIL DEFENSE.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 7:45 PM CDTSevere Thunderstorm WarningOUNLove45 min
Apr 11, 8:50 PM CDTSevere Thunderstorm WarningOUNGarvin, Murray40 min
Apr 11, 9:25 PM CDTSevere Thunderstorm WarningOUNCleveland, McClain, Pottawatomie50 min
Apr 11, 10:01 PM CDTSevere Thunderstorm WarningOUNLincoln, Pottawatomie44 min
Apr 11, 10:06 PM CDTSevere Thunderstorm WarningOUNChoctaw54 min
Apr 11, 10:29 PM CDTSevere Thunderstorm WarningOUNLincoln46 min
Apr 11, 10:43 PM CDTSevere Thunderstorm WarningOUNPushmataha47 min
Apr 12, 2:05 PM CDTSevere Thunderstorm WarningOUNBlaine25 min
Apr 12, 2:29 PM CDTSevere Thunderstorm WarningOUNBlaine, Major46 min
Apr 12, 2:34 PM CDTSevere Thunderstorm WarningOUNCaddo41 min
Apr 12, 3:13 PM CDTSevere Thunderstorm WarningOUNBlaine, Caddo47 min
Apr 12, 3:17 PM CDTSevere Thunderstorm WarningOUNMajor43 min
Apr 12, 3:39 PM CDTSevere Thunderstorm WarningOUNCanadian51 min
Apr 12, 3:43 PM CDTTornado WarningOUNMajor32 min
Apr 12, 3:48 PM CDTTornado WarningOUNGarfield27 min
Apr 12, 4:02 PM CDTSevere Thunderstorm WarningOUNBlaine43 min
Apr 12, 4:15 PM CDTTornado WarningOUNGarfield30 min
Apr 12, 4:24 PM CDTSevere Thunderstorm WarningOUNKingfisher51 min
Apr 12, 4:27 PM CDTSevere Thunderstorm WarningOUNCaddo, Kiowa48 min
Apr 12, 4:38 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant52 min
Apr 12, 4:43 PM CDTTornado WarningOUNGarfield, Grant47 min
Apr 12, 4:46 PM CDTTornado WarningOUNKingfisher44 min
Apr 12, 5:15 PM CDTSevere Thunderstorm WarningOUNKingfisher60 min
Apr 12, 5:19 PM CDTTornado WarningOUNKingfisher41 min
Apr 12, 5:22 PM CDTSevere Thunderstorm WarningOUNCarter, Love68 min
Apr 12, 6:04 PM CDTTornado WarningOUNKingfisher26 min
Apr 12, 6:06 PM CDTTornado WarningOUNCarter39 min
Apr 12, 6:24 PM CDTTornado WarningOUNKingfisher36 min
Apr 12, 6:34 PM CDTSevere Thunderstorm WarningOUNWoodward41 min
Apr 12, 6:45 PM CDTSevere Thunderstorm WarningOUNGarfield60 min

Nearby

Tornado Warnings in Oklahoma, 1991Every tornado warning in 1991Tornadoes in 1991

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.