Alert archive / Texas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 287, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 9, 1998, 2:54 PM CDT for Knox County, Texas. It was in force for 51 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
- Jun 9, 1998, 2:54 PM CDT (19:54 UTC)
- Expired
- Jun 9, 1998, 3:45 PM CDT
- In force
- 51 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Knox County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 9, 3:15 PM CDT | Hail 1.75 | Truscott, TX | |
| Jun 9, 3:45 PM CDT | Hail 0.88 | Knox City, TX |
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.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 7.9 hours before the alert went out and 244 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
- 633 J/kg
- Mixed-layer CIN
- -434 J/kg
- Mixed-layer LCL
- 1019 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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.
NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 9, 10:42 AM CDT, 4 hours 12 minutes earlier.
Area forecast discussion, Jun 9, 10:42 AM CDT, 4 hours 12 minutes before
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Local storm report, Jun 9, 9:23 AM CDT, 5 hours 31 minutes before
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</html>Local storm report, Jun 9, 11:42 AM CDT, 3 hours 12 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1137 AM CDT TUE JUN 9 1998
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0405 PM 5NW EL RENO OK 68 MPH WIND GUST
06/08/98 CANADIAN MESONET RECORDED WIND GUST
SCSpecial weather statement, Jun 9, 12:30 PM CDT, 2 hours 24 minutes before
OKZ004>048-050>052-TXZ083>090-100030- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NORMAN OK 1230 PM CDT TUE JUN 9 1998 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING OVER PORTIONS OF CENTRAL AND SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS... SOUTHEAST OF A LINE FROM STILLWATER TO LAWTON TO QUANAH. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS. HEAVY RAINFALL ALSO WILL BE POSSIBLE... ESPECIALLY TONIGHT. DISCUSSION...A SLOW-MOVING COLD FRONT FROM NEAR CUSHING TO RUSH SPRINGS TO FREDERICK AT MIDDAY WILL CONTINUE TO SAG SLOWLY SOUTHWARD THIS AFTERNOON. AFTERNOON HEATING WILL RESULT IN DESTABILIZATION... WITH THUNDERSTORMS POSSIBLY DEVELOPING LATE THIS AFTERNOON ALONG AND AHEAD OF THE FRONT. IN ADDITION... SEVERAL OUTFLOW BOUNDARIES FROM LAST NIGHT/S THUNDERSTORMS ARE STILL LINGERING ACROSS CENTRAL AND SOUTHERN OKLAHOMA...WHICH MAY SERVE AS A FOCUSING MECHANISM FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOON. ALTHOUGH AMPLE LOW LEVEL MOISTURE IS ALREADY IN PLACE ACROSS CENTRAL AND SOUTHERN OKLAHOMA WITH DEWPOINTS IN THE LOWER 70S... WIND SHEAR PROFILES ARCOSS THE AREA WILL BE WEAKER TODAY... RESULTING IN A LOWER POTENTIAL FOR SUPERCELLS. NEVERTHELESS... A FEW SEVERE STORMS ARE EXPECTED FROM MID AFTERNOON THROUGH THIS EVENING PRODUCING LARGE HAIL AND DAMAGING WIND GUSTS. THE SEVERE WEATHER THREAT IS EXPECTED TO DIMINISH BY LATE EVENING... WITH LOCALLY HEAVY RAINFALL BEING A CONCERN DURING THE OVERNIGHT HOURS. A FEW THUNDERSTORMS MAY ALSO APPROACH SEVERE LIMITS ACROSS WESTERN OKLAHOMA AND WESTERN NORTH TEXAS THIS EVENING. DESPITE THIS AREA BEING NORTH OF THE SURFACE FRONT... WINDS WILL GRADUALLY TURN AROUND TO THE SOUTHEAST BY THIS EVENING. THE RESULTING UPSLOPE WINDS AND RETURN OF LOW LEVEL MOISTURE TO THE AREA MAY PROVIDE ENOUGH LIFT AND DESTABILIZATION FOR THUNDERSTORM DEVELOPMENT. EMERGENCY MANAGERS ARE ENCOURAGED TO LISTEN FOR UPDATES THROUGH THE AFTERNOON. SPOTTER ACTIVATION MAY BE REQUIRED IN THE SLIGHT RISK AREA FROM MIDAFTERNOON WELL INTO TONIGHT. 24
Special weather statement, Jun 9, 12:30 PM CDT, 2 hours 24 minutes before
OKZ004>048-050>052-TXZ083>090-100030- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NORMAN OK 1230 PM CDT TUE JUN 9 1998 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING OVER PORTIONS OF CENTRAL AND SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS... SOUTHEAST OF A LINE FROM STILLWATER TO LAWTON TO QUANAH. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS. HEAVY RAINFALL ALSO WILL BE POSSIBLE... ESPECIALLY TONIGHT. DISCUSSION...A SLOW-MOVING COLD FRONT FROM NEAR CUSHING TO RUSH SPRINGS TO FREDERICK AT MIDDAY WILL CONTINUE TO SAG SLOWLY SOUTHWARD THIS AFTERNOON. AFTERNOON HEATING WILL RESULT IN DESTABILIZATION... WITH THUNDERSTORMS POSSIBLY DEVELOPING LATE THIS AFTERNOON ALONG AND AHEAD OF THE FRONT. IN ADDITION... SEVERAL OUTFLOW BOUNDARIES FROM LAST NIGHT/S THUNDERSTORMS ARE STILL LINGERING ACROSS CENTRAL AND SOUTHERN OKLAHOMA...WHICH MAY SERVE AS A FOCUSING MECHANISM FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOON. ALTHOUGH AMPLE LOW LEVEL MOISTURE IS ALREADY IN PLACE ACROSS CENTRAL AND SOUTHERN OKLAHOMA WITH DEWPOINTS IN THE LOWER 70S... WIND SHEAR PROFILES ARCOSS THE AREA WILL BE WEAKER TODAY... RESULTING IN A LOWER POTENTIAL FOR SUPERCELLS. NEVERTHELESS... A FEW SEVERE STORMS ARE EXPECTED FROM MID AFTERNOON THROUGH THIS EVENING PRODUCING LARGE HAIL AND DAMAGING WIND GUSTS. THE SEVERE WEATHER THREAT IS EXPECTED TO DIMINISH BY LATE EVENING... WITH LOCALLY HEAVY RAINFALL BEING A CONCERN DURING THE OVERNIGHT HOURS. A FEW THUNDERSTORMS MAY ALSO APPROACH SEVERE LIMITS ACROSS WESTERN OKLAHOMA AND WESTERN NORTH TEXAS THIS EVENING. DESPITE THIS AREA BEING NORTH OF THE SURFACE FRONT... WINDS WILL GRADUALLY TURN AROUND TO THE SOUTHEAST BY THIS EVENING. THE RESULTING UPSLOPE WINDS AND RETURN OF LOW LEVEL MOISTURE TO THE AREA MAY PROVIDE ENOUGH LIFT AND DESTABILIZATION FOR THUNDERSTORM DEVELOPMENT. EMERGENCY MANAGERS ARE ENCOURAGED TO LISTEN FOR UPDATES THROUGH THE AFTERNOON. SPOTTER ACTIVATION MAY BE REQUIRED IN THE SLIGHT RISK AREA FROM MIDAFTERNOON WELL INTO TONIGHT. 24
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 7:11 PM CDT | Severe Thunderstorm Warning | OUN | Seminole | 49 min |
| Jun 8, 7:13 PM CDT | Tornado Warning | OUN | Pottawatomie, Seminole | 32 min |
| Jun 8, 7:40 PM CDT | Tornado Warning | OUN | Hughes, Seminole | 35 min |
| Jun 8, 7:46 PM CDT | Severe Thunderstorm Warning | OUN | Canadian | 44 min |
| Jun 8, 8:11 PM CDT | Tornado Warning | OUN | Hughes | 34 min |
| Jun 8, 8:27 PM CDT | Severe Thunderstorm Warning | OUN | Canadian | 48 min |
| Jun 8, 8:51 PM CDT | Severe Thunderstorm Warning | OUN | Oklahoma | 39 min |
| Jun 8, 9:28 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Oklahoma | 47 min |
| Jun 8, 10:13 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 22 min |
| Jun 9, 4:45 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 45 min |
| Jun 9, 5:25 PM CDT | Severe Thunderstorm Warning | OUN | Cotton | 50 min |
| Jun 9, 5:59 PM CDT | Severe Thunderstorm Warning | OUN | Jefferson | 46 min |
| Jun 9, 6:26 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Murray | 34 min |
| Jun 9, 6:45 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Stephens | 45 min |
| Jun 9, 6:45 PM CDT | Severe Thunderstorm Warning | OUN | Love | 45 min |
| Jun 9, 6:56 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Murray | 49 min |
| Jun 9, 3:18 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Wilbarger | 42 min |
| Jun 9, 3:32 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 43 min |
| Jun 9, 3:54 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Knox | 66 min |
| Jun 9, 4:00 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Wichita, Wilbarger | 60 min |
| Jun 9, 4:57 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Foard, Knox | 48 min |
| Jun 9, 4:57 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Wichita, Wilbarger | 48 min |
| Jun 9, 5:08 PM CDT | Severe Thunderstorm Warning | OUN | Clay | 52 min |
| Jun 9, 5:35 PM CDT | Tornado Warning | OUN | Clay | 30 min |
| Jun 9, 5:43 PM CDT | Tornado Warning | OUN | Archer | 47 min |
| Jun 9, 5:46 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Wichita, Wilbarger | 44 min |
| Jun 9, 5:59 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Clay, Wichita | 46 min |
| Jun 9, 6:10 PM CDT | Flash Flood Warning | OUN | Clay, Wichita | 3 hr |
| Jun 9, 6:36 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman, Wilbarger | 39 min |
| Jun 9, 6:50 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Clay | 40 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1998Every severe thunderstorm warning in 1998
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.