Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 91, NWS Tulsa, OK

September 15, 1987Osage County, Tulsa County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Sep 15, 1987, 7:15 PM CDT for Osage County, Tulsa County, Oklahoma. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Sep 15, 1987, 7:15 PM CDT (00:15 UTC)
Expired
Sep 15, 1987, 8:15 PM CDT
In force
60 min
Issued by
NWS Tulsa, OK
Area
Whole counties

Counties Osage County, OK, Tulsa 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

Ok Cty/Will Rgrs, OK (KOKC), launched 00:00Z, 0.3 hours before the alert went out and 168 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 00:00Z on 1987-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2193 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1987-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
2193 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1083 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
1.3
Supercell composite
4.8

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 Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 15, 7:45 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa60 min
Sep 15, 7:54 PM CDTSevere Thunderstorm WarningTSACreek60 min
Sep 15, 8:35 PM CDTSevere Thunderstorm WarningTSATulsa40 min
Sep 15, 10:06 PM CDTSevere Thunderstorm WarningTSAAdair24 min
Sep 15, 10:15 PM CDTSevere Thunderstorm WarningTSABenton, Washington60 min
Sep 15, 11:23 PM CDTSevere Thunderstorm WarningTSACrawford, Sebastian67 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.