Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 75, NWS Tulsa, OK

August 19, 1987Nowata County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 19, 1987, 3:17 AM CDT for Nowata County, Oklahoma. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Aug 19, 1987, 3:17 AM CDT (08:17 UTC)
Expired
Aug 19, 1987, 4:15 AM CDT
In force
58 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Nowata 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

Springfield, MO (KUMN), launched 00:00Z, 8.3 hours before the alert went out and 162 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, Springfield, MO at 00:00Z on 1987-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 407 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, Springfield, MO at 00:00Z on 1987-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -75 square meters per square second.193958Sfc1 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
407 J/kg
Mixed-layer CIN
-193 J/kg
Mixed-layer LCL
1574 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-75 m²/s²
0-3 km storm-relative helicity
-3 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 190825 COR
SVRTUL
OKC105-190917-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
317 AM CDT WED AUG 19 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  415 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
          ...NOWATA

AT 315 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM LOCATED 7 MILES
WEST OF DELAWARE MOVING TO THE EAST AT 15 MPH.

SSEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
LARGE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 3:47 AM CDTSevere Thunderstorm WarningTSAOsage, Washington60 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.