Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 182, NWS Tulsa, OK

July 12, 1989Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 12, 1989, 9:28 PM CDT for Pittsburg County, Oklahoma. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Jul 12, 1989, 9:28 PM CDT (02:28 UTC)
Expired
Jul 12, 1989, 10:30 PM CDT
In force
62 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Pittsburg 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

Norman, OK (KOUN), launched 00:00Z, 2.5 hours before the alert went out and 154 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, Norman, OK at 00:00Z on 1989-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2897 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, Norman, OK at 00:00Z on 1989-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.1939Sfc1 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
2897 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1903 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
0.1
Supercell composite
8.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 130231
SVRTUL
OKC121-130330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
928 PM CDT WED JUL 12 1989
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHEAST OKLAHOMA
          ...SOUTHERN PITTSBURG
 
AT 927 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTH OF
SCIPIO, OKLA. MOVING SOUTH AT 15 MPH.
 
SEVERE 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.

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, Jul 12, 8:01 PM CDT, 1 hour 27 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
801 PM CDT WED JUL 12 1989

 TIME/CDT COUNTY      EVENT  (CD=CIVIL DEFENSE  OHP=OK HIGHWAY PAT'L)
 800  PM  MCINTOSH    GOLF BALL SIZE HAIL AT PIERCE.

+
Local storm report, Jul 12, 8:56 PM CDT, 32 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
856 PM CDT WED JUL 12 1989

 TIME/CDT COUNTY      EVENT  (CD=CIVIL DEFENSE  OHP=OK HIGHWAY PAT'L)
 850  PM  PITTSBURG   DIME SIZE HAIL AT INDIANOLA.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:41 PM CDTSevere Thunderstorm WarningTSAMcIntosh64 min
Jul 12, 8:34 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Pittsburg56 min
Jul 12, 9:24 PM CDTSevere Thunderstorm WarningTSALeFlore66 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1989Every severe thunderstorm warning in 1989

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.