Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 101, NWS Norman, OK

April 13, 1990Oklahoma County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 13, 1990, 5:45 PM CDT for Oklahoma County, Oklahoma. It was in force for 45 min. 1 report 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
Apr 13, 1990, 5:45 PM CDT (22:45 UTC)
Expired
Apr 13, 1990, 6:30 PM CDT
In force
45 min
Issued by
NWS Norman, OK
Area
Whole counties

County Oklahoma County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Apr 13, 5:58 PM CDTHail 0.75Oklahoma, 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, 10.8 hours before the alert went out and 37 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 1990-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1990-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 196 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
837 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
196 m²/s²
0-3 km storm-relative helicity
266 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KOKC 132244
SVROKC
OKC109-132330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
545 PM CDT FRI APR 13 1990
 
THE NATIONAL WEATHER SERVICE IN OKLAHOMA CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 PM CDT
FOR THE FOLLOWING OKLAHOMA LOCATIONS...
 
IN CENTRAL OKLAHOMA
 
   ...WESTERN OKLAHOMA COUNTY
 
AT 545 PM A SEVERE THUNDERSTORM WAS 4 MILES NORTHWEST OF YUKON. THIS
STORM HAS A HISTORY OF VERY LARGE HAIL AND WILL MOVE INTO WESTERN
PARTS OF OKLAHOMA COUNTY WITHIN THE HOUR. RESIDENTS IN THE BETHANY AND
WARR ACRES AREA AS WELL AS WESTERN PARTS OF OKLAHOMA CITY ARE URGED TO
TAKE THIS STORM SERIOUSLY AND MOVE IMMEDIATELY TO A SAFE PLACE. THIS
STORM HAS STOPPED TRAFFIC WITH HAIL UP TO 6 INCHES DEEP ON INTERSTATE
40. ALL UNNECESSARY TRAVEL SHOULD BE AVOIDED.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

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, Apr 13, 1:09 PM CDT, 4 hours 36 minutes before
TXZ019-020-132100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
105 PM CDT FRI MAR 13 1990

...COLD FRONT MOVING TOWARDS WICHITA FALLS...

BY THE START OF THE AFTERNOON HOURS..A COLD FRONT HAD MOVED TO SOUTH
OF GAGE OKLAHOMA AND AMARILLO TEXAS. MOVEMENT WAS TOWARDS THE SOUTH
AND SOUTHEAST AT NEAR 30 MPH.

THIS COLD FRONT/WIND SHIFT LINE SHOULD APPROACH/PASS THE WICHITA FALLS
AREA AROUND SUNSET. NO PRECIPITATION WAS BEING DETECTED BY NATIONAL
WEATHER SERVICE RADARS IN NORTHWEST OKLAHOMA AND NORTHWEST TEXAS.

HOWEVER...AS THIS CHANCE OF AIRMASS MOVES CLOSER TO THE LOCAL AREA...
THUNDERSTORMS WERE STILL FORECAST TO DEVELOP. THE CURRECT OVERCAST
SKIES HAS INHIBITED THE EXPECTED AFTERNOON WARM-UP INTO THE MID 70S
RANGE AND HELD SURFACE WINDS BELOW LAKE WIND ADVISORY CRITERIA.
Special weather statement, Apr 13, 1:16 PM CDT, 4 hours 29 minutes before
OKZALL-141200-
OKLAHOMA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
100 PM CDT FRI APR 13 1990

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
   TONIGHT OVER ALL BUT THE PANHANDLE AND EXTREME NORTHWEST OKLAHOMA.
   THIS AREA IS SOUTHEAST OF A LINE FROM ALVA TO REYDON.

A COLD FRONT MOVED INTO EXTREME NORTHWEST OKLAHOMA THIS MORNING AND AT
MIDDAY WAS ALONG A LINE FROM FREEDOM TO WOODWARD TO ARNETT. GUSTY
SOUTHERLY WINDS AHEAD OF THE FRONT HAVE CONTINUED TO BRING INCREASING
MOISTURE TO THE AREA AND WILL AID IN THE DEVELOPMENT OF THUNDERSTORM
ACTIVITY LATER THIS AFTERNOON AND TONIGHT AS THE FRONT MOVES
SOUTHEASTWARD ACROSS THE STATE. A DRY LINE DEVLOPING OVER WEST TEXAS IS
EXPECTED TO MOVE EASTWARD AND REACH WESTERN OKLAHOMA BY LATE THIS
AFTERNOON. THE INTERSECTION OF THE DRY LINE WITH THE COLD FRONT IS
EXPECTED TO OCCUR FROM WEST-CENTRAL TO NORTH-CENTRAL OKLAHOMA DURING
MAXIMUM HEATING TIME THIS AFTERNOON INCREASING THE POTENTIAL FOR
SEVERE THUNDERSTORMS IN THAT AREA.
AN UPPER LEVEL SYSTEM MOVING EAST-SOUTHEASTWARD ACROSS THE CENTRAL
PLAINS HAS ALREADY TRIGGERED THUNDERSTORMS ALONG THE COLD FRONT IN
EASTERN AND SOUTHERN KANSAS. THUNDERSTORMS ARE EXPECTED TO DEVELOP
SOUTHWESTWARD FROM KANSAS ALONG THE COLD FRONT INTO PORTIONS OF
NORTHCENTRAL AND NORTHWEST OKLAHOMA EARLY THIS AFTERNOON. ADDITIONAL
THUNDERSTORM DEVELOPEMNT IS EXPECTED LATER THIS AFTERNOON ALONG THE
THE COLD FRONT AND APPROACHING DRY LINE IN WESTCENTRAL AND SOUTHWEST
OKLAHOMA. THIS ACTIVITY WILL THEN SPREAD EASTWARD ACROSS THE REMAINDER
OF THE STATE TONIGHT BUT WILL END IN THE WEST AND CENTRAL BEHIND THE
COLD FRONT. CURRENT INDICATIONS ARE THAT THE GREATEST THREAT
OF SEVERE WEATHER WILL BE DURING THE AFTERNOON AND EVENING HOURS OVER
WESTERN AND CENTRAL OKLAHOMA AHEAD OF THE COLD FRONT.

THE COLD FRONT WILL MOVE EAST OF OKLAHOMA SATURDAY MORNING WITH
DRIER AND MORE STABLE AIR SPREADING OVER THE AREA.

CIVL DEFENSE AND STORM SPOTTER GROUPS ACROSS THE AREA SHOULD REMAIN
ALERT AND BE READY FOR ACTIVITATION THIS AFTERNOON AND TONIGHT.
Special weather statement, Apr 13, 3:34 PM CDT, 2 hours 11 minutes before
OKZ006-007-008-010-011-012-014-016-017-021-022-132200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
332 PM CDT FRI APR 13 1990

A LINE OF THUNDERSTORMS HAS DEVELOPED RAPIDLY ALONG A COLD FRONT FROM
NORTHEASTERN INTO WEST CENTRAL OKLAHOMA. AT 330 PM THE LINE STRETCHES
FROM NORTH OF PAWHUSKA TO MARSHALL TO THOMAS. THUNDERSTORMS ON THIS
LINE ARE MOVING EAST AT 25 MPH.

FURTHER INTENSIFICATION IS EXPECTED AS THESE STORMS MOVE INTO
NORTHEASTERN AND CENTRAL OKLAHOMA... WITH ADDITIONAL DEVELOPMENT
POSSIBLE SOUTHWESTWARD INTO SOUTHWEST OKLAHOMA. THESE STORMS ARE BEING
MONITORED CLOSELY AND COULD BECOME SEVERE AT ANY TIME. RESIDENTS
THROUGHOUT NORTHEASTERN CENTRAL AND SOUTHWESTERN OKLAHOMA ARE ADVISED
TO REMAIN ALERT FOR CHANGING WEATHER CONDITIONS AND STAY TUNED FOR
LATER STATEMENTS AND POSSIBLE SEVERE WEATHER WATCHES OR WARNINGS. A
SEVERE THUNDERSTORM WATCH WILL BE ISSUED SHORTLY FOR A LARGE PART OF
THE STATE EFFECTIVE UNTIL 9 PM.
Special weather statement, Apr 13, 3:58 PM CDT, 1 hour 47 minutes before
TXZ019-020-132200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
4 PM CDT FRI MAR 13 1990

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9PM CDT FOR THE
FOLLOWING NORTH CENTRAL TEXAS COUNTIES...ARCHER...BAYLOR...CLAY...
FOARD...HARDEMAN...KNOX...WICHITA AND WILBARGER.

A COLD FRONT/WIND SHIFT LINE WAS MOVING THROUGH CENTRAL OKLAHOMA
AND THE NORTHERN SECTIONS OF THE SOUTH TEXAS PLAINS. A LINE OF
THUNDERSTORMS HAVE FORMED NORTHWEST AND NORTHEAST OF OKLAHOMA CITY.
MOVEMENT WAS EAST SOUTHEAST AT 30 MPH.

NO THUNDERSTORMS HAVE FORMED IN THIS SECTION OF NORTH CENTRAL TEXAS
OR ALONG THE COLD FRONT IN THE SOUTH TEXAS PLAINS.

THE COLD FRONTAL BOUNDARY IS FORECAST TO AFFECT THE RED RIVER VALLEY
AROUND SUNSET.

THE SEVERE WEATHER THREAT FROM THIS EVENING THUNDERSTORMS IS
EXPECTED TO BE HAIL AND HIGH WIND. FREQUENT LIGHTNING AND
BRIEF BUT HEAVY RAIN SHOULD ALSO BE EXPECTED AS THE ACTIVITY
PASSES YOUR AREA.
Special weather statement, Apr 13, 4:59 PM CDT, 46 minutes before
TXZ019-020-132300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
5 PM CDT FRI MAR 13 1990

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9PM CDT FOR THE
FOLLOWING NORTH CENTRAL TEXAS COUNTIES...ARCHER...BAYLOR...CLAY...
FOARD...HARDEMAN...KNOX...WICHITA AND WILBARGER.

A COLD FRONT/WIND SHIFT LINE WAS MOVING THROUGH CENTRAL OKLAHOMA
AND THE NORTHERN SECTIONS OF THE SOUTH TEXAS PLAINS. A LINE OF
THUNDERSTORMS HAVE FORMED FROM JUST NORTH OF TULSA OKLAHOMA TO 20
NORTHWEST OF OKLAHOMA CITY TO 30 WEST NORTHWEST OF HOBART.

NO THUNDERSTORM ACTIVITY LOCATED OVER NORTH WEST TEXAS AT THIS TIME.

THE SEVERE WEATHER THREAT THIS EVENING.. SHOULD THUNDERSTORMS COME
THROUGH THISk AREA.. IS FOR HAIL..HIGH WINDS AND DANGEROUS LIGHTNING.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 3:36 PM CDTSevere Thunderstorm WarningOUNBlaine30 min
Apr 13, 3:48 PM CDTTornado WarningOUNBlaine27 min
Apr 13, 4:23 PM CDTSevere Thunderstorm WarningOUNKingfisher52 min
Apr 13, 4:41 PM CDTSevere Thunderstorm WarningOUNCanadian49 min
Apr 13, 4:51 PM CDTSevere Thunderstorm WarningOUNLogan69 min
Apr 13, 5:23 PM CDTSevere Thunderstorm WarningOUNCanadian52 min
Apr 13, 5:51 PM CDTSevere Thunderstorm WarningOUNCaddo, Grady39 min
Apr 13, 6:33 PM CDTSevere Thunderstorm WarningOUNGrady27 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990Every severe thunderstorm warning in 1990

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.