Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 101, NWS Norman, OK
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
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 13, 5:58 PM CDT | Hail 0.75 | Oklahoma, 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.
- 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
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 3:36 PM CDT | Severe Thunderstorm Warning | OUN | Blaine | 30 min |
| Apr 13, 3:48 PM CDT | Tornado Warning | OUN | Blaine | 27 min |
| Apr 13, 4:23 PM CDT | Severe Thunderstorm Warning | OUN | Kingfisher | 52 min |
| Apr 13, 4:41 PM CDT | Severe Thunderstorm Warning | OUN | Canadian | 49 min |
| Apr 13, 4:51 PM CDT | Severe Thunderstorm Warning | OUN | Logan | 69 min |
| Apr 13, 5:23 PM CDT | Severe Thunderstorm Warning | OUN | Canadian | 52 min |
| Apr 13, 5:51 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Grady | 39 min |
| Apr 13, 6:33 PM CDT | Severe Thunderstorm Warning | OUN | Grady | 27 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.