Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 355, NWS Norman, OK

November 24, 1987Cleveland County, McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Nov 24, 1987, 3:01 PM CST for Cleveland County, McClain County, Oklahoma. It was in force for 44 min.

The area

The counties it named.

The facts

Issued
Nov 24, 1987, 3:01 PM CST (21:01 UTC)
Expired
Nov 24, 1987, 3:45 PM CST
In force
44 min
Issued by
NWS Norman, OK
Area
Whole counties

Counties Cleveland 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.

The nearest sounding before it

Fort Sill, OK (KFSI), launched 12:00Z, 9.0 hours before the alert went out and 106 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, Fort Sill, OK at 12:00Z on 1987-11-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 654 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Sill, OK at 12:00Z on 1987-11-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 342 square meters per square second.19395878Sfc1 km3 km6 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
654 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
520 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
342 m²/s²
0-3 km storm-relative helicity
310 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.0

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 24, 4:15 PM CSTSevere Thunderstorm WarningOUNStephens60 min
Nov 24, 4:48 PM CSTSevere Thunderstorm WarningOUNCotton42 min
Nov 24, 5:10 PM CSTSevere Thunderstorm WarningOUNPottawatomie50 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1987Every severe thunderstorm warning in 1987

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.