Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 74, NWS Tulsa, OK

May 13, 1992Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 13, 1992, 5:56 PM CDT for Pittsburg County, Oklahoma. It was in force for 44 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
May 13, 1992, 5:56 PM CDT (22:56 UTC)
Expired
May 13, 1992, 6:40 PM CDT
In force
44 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Pittsburg County, OK

What was reported inside it

TimeReportWhereRemark
May 13, 5:57 PM CDTHail 2.75Pittsburg, OK
May 13, 6:17 PM CDTHail 2.75Pittsburg, 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

Norman, OK (KOUN), launched 12:00Z, 10.9 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 12:00Z on 1992-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1245 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 12:00Z on 1992-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
1245 J/kg
Mixed-layer CIN
-262 J/kg
Mixed-layer LCL
867 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTUL 132302 COR
SVRTUL
OKC121-140000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
556 PM CDT WED MAY 13 1992

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES ...

IN SOUTHEAST OKLAHOMA

   ...PITTSBURG COUNTY

AT 555 PM A SEVERE THUNDERSTORM WAS OVER SOUTHERN PITTSBURG COUNTY 5
MILES SOUTHEAST OF MCALESTER. BASEBALL SIZE HAIL HAS FALLEN JUST SOUTH
OF SAVANNA.  ANOTHER DEVELOPING STORM WAS 2 MILES SOUTH OF HAYWOOD AND
MAY SOON BECOME SEVERE.  BOTH STORMS WERE MOVING NORTHEAST 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

Special weather statement, May 13, 1:37 PM CDT, 4 hours 19 minutes before
OKZ026>034-040-141200-
EASTERN OKLAHOMA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
135 PM CDT WED MAY 13 1992

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PART OF SOUTHEAST OKLAHOMA
UNTIL 7 PM THIS EVENING.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER MAINLY SOUTHEAST
AND EAST CENTRAL OKLAHOMA THROUGH THIS EVENING...

THIS AFTERNOON THE ATMOSPHERE OVER EASTERN OKLAHOMA WAS BECOMING
INCREASINGLY UNSTABLE.  ALTHOUGH NO WELL DEFINED BOUNDRY WAS PRESENT
OVER THE AREA TO FOCUS THE DEVELOPMENT OF THUNDERSTORMS...THE REMNANTS
OF A WEAK COOL FRONT OVER THE SOUTH...ALONG WITH AFTERNOON HEATING
HAS BEEN SUFFICIENT TO ALLOW A FEW WIDELY SCATTERED SHOWERS AND
THUNDERSTORMS TO DEVELOP.  ADDITIONAL THUNDERSTORMS WILL REMAIN
POSSIBLE THIS AFTERNOON...WITH THE MOST LIKELY AREAS FOR DEVELOPMENT
OVER THE SOUTHEAST AND EAST CENTRAL COUNTIES WHERE THE INSTABILITY
IS GREATER AND MORE LOW LEVEL MOISTURE IS PRESENT.  THUNDERSTORMS
WILL HAVE THE POTENTIAL TO QUICKLY BECOME SEVERE THIS AFTERNOON
WITH THE MAIN THREAT BEING LARGE HAIL AND STRONG WINDS.  ANY ACTIVITY
IS EXPECTED TO DIMINISH LATER THIS EVENING AFTER THE LOSS OF DAYTIME
HEATING.

LATER TONIGHT AN UPPER LEVEL SYSTEM APPROACHING FROM THE ROCKIES
COULD TRIGGER ADDITIONAL SHOWERS AND THUNDERSTORMS TO THE WEST AND
NORTHWEST OF THE AREA WHICH COULD AFFECT EASTERN OKLAHOMA TOWARD
DAYBREAK.

CIVIL DEFENSE AND SPOTTER GROUPS OVER THE AREA SHOULD REMAIN ALERT
AND BE READY FOR ACTIVATION IF NECESSARY LATER THIS AFTERNOON
THROUGH THIS EVENING.
Special weather statement, May 13, 4:53 PM CDT, 1 hour 3 minutes before
OKZ033-132220-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
450 PM CDT WED MAY 13 1992

...STRONG THUNDERSTORM MOVING INTO SOUTH CENTRAL PITTSBURG COUNTY...

AT 450 PM A THUNDERSTORM WITH VERY HEAVY RAIN WAS CROSSING THE
ATOKA-PITTSBURG COUNTY LINE.  THE STORM WAS MOVING NORTHEAST AT
15 MILES AN HOUR TOWARD THE TOWNS OF PITTSBURG AND BLANCO.  STAY INDOORS
IF THIS STORM IS IN YOUR AREA AND LISTEN FOR LATER STATEMENTS.
Local storm report, May 13, 5:17 PM CDT, 39 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
516 PM CDT WED MAY 13 1992

TIME(CDT)    COUNTY         REPORT

515 PM       PITTSBURG      GOLFBALL SIZE HAIL AT PITTSBURG IN EXTREME
                            SOUTHERN PITTSBURG COUNTY.

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1992Every severe thunderstorm warning in 1992

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.