Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 64, NWS Norman, OK

April 3, 1986Pottawatomie County, Seminole County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 3, 1986, 4:10 PM CST for Pottawatomie County, Seminole County, Oklahoma. It was in force for 40 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 3, 1986, 4:10 PM CST (22:10 UTC)
Expired
Apr 3, 1986, 4:50 PM CST
In force
40 min
Issued by
NWS Norman, OK
Area
Whole counties

Counties Pottawatomie County, OK, Seminole 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
Apr 3, 4:11 PM CSTHail 0.75Pottawatomie, OK
Apr 3, 4:11 PM CSTHail 0.75Pottawatomie, 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

Ok Cty/Will Rgrs, OK (KOKC), launched 12:00Z, 10.2 hours before the alert went out and 78 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, Ok Cty/Will Rgrs, OK at 12:00Z on 1986-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1300 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, Ok Cty/Will Rgrs, OK at 12:00Z on 1986-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 square meters per square second.19395878Sfc1 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
1300 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
576 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
144 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.7

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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Apr 3, 12:10 PM CST, 4 hours before
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Special weather statement, Apr 3, 1:16 PM CST, 2 hours 54 minutes before
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Special weather statement, Apr 3, 3:00 PM CST, 1 hour 10 minutes before
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Special weather statement, Apr 3, 3:30 PM CST, 40 minutes before
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Special weather statement, Apr 3, 3:59 PM CST, 11 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 10:21 AM CSTSevere Thunderstorm WarningOUNGrady, Stephens39 min
Apr 3, 11:00 AM CSTSevere Thunderstorm WarningOUNGrady, McClain45 min
Apr 3, 11:22 AM CSTSevere Thunderstorm WarningOUNLogan, Oklahoma38 min
Apr 3, 11:44 AM CSTSevere Thunderstorm WarningOUNCleveland, Oklahoma36 min
Apr 3, 11:44 AM CSTSevere Thunderstorm WarningOUNMcClain36 min
Apr 3, 11:55 AM CSTSevere Thunderstorm WarningOUNCotton, Stephens35 min
Apr 3, 11:55 AM CSTSevere Thunderstorm WarningOUNGrady35 min
Apr 3, 12:04 PM CSTSevere Thunderstorm WarningOUNNoble, Payne41 min
Apr 3, 12:24 PM CSTSevere Thunderstorm WarningOUNGrady, McClain36 min
Apr 3, 1:05 PM CSTSevere Thunderstorm WarningOUNCleveland, Oklahoma45 min
Apr 3, 1:45 PM CSTSevere Thunderstorm WarningOUNCleveland, Logan, Oklahoma45 min
Apr 3, 1:45 PM CSTSevere Thunderstorm WarningOUNMcClain45 min
Apr 3, 2:00 PM CSTSevere Thunderstorm WarningOUNGarvin, Stephens45 min
Apr 3, 2:17 PM CSTSevere Thunderstorm WarningOUNLincoln, Pottawatomie43 min
Apr 3, 2:23 PM CSTSevere Thunderstorm WarningOUNCleveland, McClain37 min
Apr 3, 2:33 PM CSTSevere Thunderstorm WarningOUNStephens42 min
Apr 3, 2:54 PM CSTSevere Thunderstorm WarningOUNLincoln, Payne56 min
Apr 3, 3:10 PM CSTSevere Thunderstorm WarningOUNGarvin, McClain50 min
Apr 3, 3:10 PM CSTSevere Thunderstorm WarningOUNStephens50 min
Apr 3, 4:25 PM CSTSevere Thunderstorm WarningOUNCarter, Love45 min
Apr 3, 5:08 PM CSTSevere Thunderstorm WarningOUNLove37 min
Apr 3, 5:43 PM CSTSevere Thunderstorm WarningOUNMarshall32 min
Apr 3, 5:53 PM CSTSevere Thunderstorm WarningOUNBryan47 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1986Every severe thunderstorm warning in 1986

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.