Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 396, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 9, 1998, 7:10 AM CDT for Muskogee County, Okmulgee County, Wagoner County, Oklahoma. It was in force for 35 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
- Aug 9, 1998, 7:10 AM CDT (12:10 UTC)
- Expired
- Aug 9, 1998, 7:45 AM CDT
- In force
- 35 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Muskogee County, OK, Okmulgee County, OK, Wagoner County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 7:15 AM CDT | Thunderstorm Wind | Coweta, OK | Several large tree limbs blown down |
| Aug 9, 7:30 AM CDT | Thunderstorm Wind | Haskell, OK | Several large tree limbs blown down |
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
Norman, OK (KOUN), launched 12:00Z, 0.2 hours before the alert went out and 171 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
- 264 J/kg
- Mixed-layer CIN
- -313 J/kg
- Mixed-layer LCL
- 1999 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 260 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 KTUL 091210 RRA SVRTUL OKC101-111-145-091245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 710 AM CDT SUN AUG 9 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA EASTERN OKMULGEE COUNTY IN NORTHEASTERN OKLAHOMA SOUTHWESTERN WAGONER COUNTY IN NORTHEASTERN OKLAHOMA * UNTIL 745 AM CDT * AT 709 AM...RADAR DETECTED A SEVERE THUNDERSTORM 6 MILES NORTHWEST OF HASKELL...MOVING SOUTH SOUTHEAST AT 15 MPH. * SOME LOCATIONS AFFECTED INCLUDE... STONEBLUFF HASKELL JAMESVILLE BALD HILL HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 70 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 9, 4:15 AM CDT, 2 hours 55 minutes earlier.
Area forecast discussion, Aug 9, 4:15 AM CDT, 2 hours 55 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 415 AM CDT SUN AUG 9 1998 SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPED IN THE MIDDLE LEVELS OF THE ATMOSPHERE AS ANOTHER SHORT WAVE DROPPED SOUTHWARD INTO THE MEAN TROUGH POSITION TO THE EAST. THE UPPER RIDGE SHOULD BUILD SLIGHTLY EASTWARD AS THE TROUGH SLOWLY CONTINUES IN THAT DIRECTION AS WELL. HOWEVER APPEARS THAT WEAK SHORT WAVES WILL CONTINUE TO DROP SOUTHWARD TOWARDS THE FORECAST AREA. FOR TODAY SUSPECT THAT CURRENT ACTIVITY WILL DIMINISH THIS MORNING. HOWEVER EXPECT THAT SHOWERS AND THUNDERSTORMS WILL REDEVELOP WITH HEATING. WARMING MIDDLE LEVEL TEMPERATURES SHOULD LIMIT WESTWARD EXTENT OF CONVECTION AND THUS BY AFTERNOON WILL ONLY HAVE A MENTION OF PRECIPITATION IN THE EASTERN ZONES. MODELS SHOW A SIGNIFICANT SHORT WAVE MOVING ACROSS THE CENTRAL PLAINS TONIGHT. BOTH THE 00 AND 03 UNIVERSAL COORDINATED TIME RUNS OF THE ETA HAVE THIS FEATURE STRONGER THAN THE OTHER MODELS. ETA IS PROBABLY ON THE RIGHT TRACK ALTHOUGH PERHAPS A BIT OVERDONE. THIS WOULD SUGGEST THAT A MESOSCALE CONVECTIVE SYSTEM WILL FORM TO THE NORTH OF THE FORECAST AREA. IF THE MODEL FORECAST IS CORRECT THEN THAT SYSTEM WILL REMAIN TO THE NORTH THROUGH THE NIGHT. HOWEVER LOOKS LIKE SOME MORE MIDDLE LEVEL ECHOES COULD ONCE AGAIN DEVELOP IN NORTHEAST OKLAHOMA OR NORTHWEST ARKANSAS. ACTIVITY TO THE NORTH WILL HELP PUSH A BOUNDARY INTO THE NORTHERN PORTIONS OF THE FORECAST AREA ON MONDAY. ADDITIONAL SHOWERS AND THUNDERSTORMS MAY DEVELOP ALONG AND NORTH OF THE FEATURE ON MONDAY AND INTO MONDAY NIGHT. TUL 98 74 97 75 / 20 20 20 20 FSM 99 70 100 71 / 30 20 20 20 MLC 101 73 102 73 / 20 10 10 10 BVO 98 73 95 73 / 20 20 20 20 FYV 94 67 92 66 / 20 20 30 20 IDB 99 69 101 70 / 30 20 10 10 BYV 94 66 91 65 / 20 20 30 20 MIO 95 72 92 69 / 20 20 30 20 MKO 100 73 98 74 / 20 20 20 20 F10 99 74 97 74 / 20 20 20 20 HHW 102 74 103 74 / 20 10 10 10 .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, Aug 9, 6:00 AM CDT, 1 hour 10 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT SUN AUG 9 1998 ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE IN SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS TODAY AND THIS EVENING. AN UPPER LEVEL DISTURBANCE WILL BRING SCATTERED SHOWERS AND THUNDERSTORMS TO MOST OF SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS THROUGH THE MORNING HOURS. THESE STORMS WILL BRING SOME BRIEF HEAVY RAINS AND DANGEROUS LIGHTNING...AND MAY ALSO BRIEFLY PRODUCE LARGE HAIL AND STRONG DOWNBURST WINDS. THEY ARE EXPECTED TO DIMINISH IN COVERAGE AND INTENSITY BY MID TO LATE MORNING. CLOUDS ARE EXPECTED TO BREAK ENOUGH TO ALLOW TEMPERATURES TO WARM INTO THE 90S THIS AFTERNOON OVER SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS. IF THIS OCCURS...THE AIRMASS WILL BECOME UNSTABLE AND THUNDERSTORMS COULD DEVELOP ALONG ANY WEAK SURFACE BOUNDARIES THAT THE MORNING SHOWERS LEFT BEHIND. ISOLATED STORMS COULD BRIEFLY PRODUCE LARGE HAIL AND STRONG WINDS INTO THE EARLY EVENING HOURS SOUTHEAST OF A LINE FROM FAYETTEVILLE TO MCALESTER. ANOTHER UPPER LEVEL DISTURBANCE WILL BRING A SLIGHT CHANCE FOR THUNDERSTORMS TO NORTHEAST OKLAHOMA LATE TONIGHT...WITH A BETTER CHANCE FOR THUNDERSTORMS NORTH OF THE AREA IN KANSAS. ACTIVATION OF EMERGENCY MANAGEMENT AND STORM SPOTTER GROUPS FOR SEVERE WEATHER OPERATIONS WILL NOT LIKELY BE NEEDED DUE TO THE EXPECTED ISOLATED AND SHORT LIVED NATURE OF ANY SEVERE STORMS. THIS OUTLOOK IS INTENDED TO PROVIDE GUIDANCE INFORMATION TO EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS CONCERNING TORNADOES...SEVERE THUNDERSTORMS...HIGH WIND EVENTS...AND FLOODING. INFORMATION CONCERNING OTHER HAZARDS CAN BE FOUND IN ADDITIONAL PRODUCTS ISSUED BY THE TULSA NATIONAL WEATHER SERVICE OFFICE. FOR MORE INFORMATION...VISIT THE NWS TULSA WORLD WIDE WEB PAGE AT WWW.NWSTULSA.NOAA.GOV.
Special weather statement, Aug 9, 6:00 AM CDT, 1 hour 10 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT SUN AUG 9 1998 ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE IN SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS TODAY AND THIS EVENING. AN UPPER LEVEL DISTURBANCE WILL BRING SCATTERED SHOWERS AND THUNDERSTORMS TO MOST OF SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS THROUGH THE MORNING HOURS. THESE STORMS WILL BRING SOME BRIEF HEAVY RAINS AND DANGEROUS LIGHTNING...AND MAY ALSO BRIEFLY PRODUCE LARGE HAIL AND STRONG DOWNBURST WINDS. THEY ARE EXPECTED TO DIMINISH IN COVERAGE AND INTENSITY BY MID TO LATE MORNING. CLOUDS ARE EXPECTED TO BREAK ENOUGH TO ALLOW TEMPERATURES TO WARM INTO THE 90S THIS AFTERNOON OVER SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS. IF THIS OCCURS...THE AIRMASS WILL BECOME UNSTABLE AND THUNDERSTORMS COULD DEVELOP ALONG ANY WEAK SURFACE BOUNDARIES THAT THE MORNING SHOWERS LEFT BEHIND. ISOLATED STORMS COULD BRIEFLY PRODUCE LARGE HAIL AND STRONG WINDS INTO THE EARLY EVENING HOURS SOUTHEAST OF A LINE FROM FAYETTEVILLE TO MCALESTER. ANOTHER UPPER LEVEL DISTURBANCE WILL BRING A SLIGHT CHANCE FOR THUNDERSTORMS TO NORTHEAST OKLAHOMA LATE TONIGHT...WITH A BETTER CHANCE FOR THUNDERSTORMS NORTH OF THE AREA IN KANSAS. ACTIVATION OF EMERGENCY MANAGEMENT AND STORM SPOTTER GROUPS FOR SEVERE WEATHER OPERATIONS WILL NOT LIKELY BE NEEDED DUE TO THE EXPECTED ISOLATED AND SHORT LIVED NATURE OF ANY SEVERE STORMS. THIS OUTLOOK IS INTENDED TO PROVIDE GUIDANCE INFORMATION TO EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS CONCERNING TORNADOES...SEVERE THUNDERSTORMS...HIGH WIND EVENTS...AND FLOODING. INFORMATION CONCERNING OTHER HAZARDS CAN BE FOUND IN ADDITIONAL PRODUCTS ISSUED BY THE TULSA NATIONAL WEATHER SERVICE OFFICE. FOR MORE INFORMATION...VISIT THE NWS TULSA WORLD WIDE WEB PAGE AT WWW.NWSTULSA.NOAA.GOV.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:38 AM CDT | Severe Thunderstorm Warning | TSA | Craig | 37 min |
| Aug 9, 7:45 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Okmulgee | 45 min |
| Aug 9, 8:38 AM CDT | Severe Thunderstorm Warning | TSA | Craig | 37 min |
| Aug 9, 9:10 AM CDT | Severe Thunderstorm Warning | TSA | Craig | 35 min |
| Aug 9, 11:12 AM CDT | Severe Thunderstorm Warning | TSA | Rogers | 48 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 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.