Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 182, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 6, 1998, 6:36 PM CDT for Cherokee County, Oklahoma. It was in force for 54 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
- May 6, 1998, 6:36 PM CDT (23:36 UTC)
- Expired
- May 6, 1998, 7:30 PM CDT
- In force
- 54 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Cherokee County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 6, 7:18 PM CDT | Hail 0.75 | Tahlequah, 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 6, 3:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.6 hours before the alert went out and 230 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
- 213 J/kg
- Mixed-layer CIN
- -295 J/kg
- Mixed-layer LCL
- 1070 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- -116 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.5
The text
As transmitted, in the capitals the NWS used until 2016.
572 WUUS54 KTSA 062337 RRA SVRTUL OKC021-070030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 636 PM CDT WED MAY 6 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CHEROKEE COUNTY - EAST CENTRAL OKLAHOMA * UNTIL 730 PM CDT * AT 635 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM NEAR FORT GIBSON...MOVING EAST AT 25 MPH. * SOME LOCATIONS AFFECTED INCLUDE... LAKE TENKILLER HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH. WHEN THUNDERSTORMS APPROACH...TAKE COVER INSIDE A STURDY BUILDING. STAY AWAY FROM WINDOWS. TO PROTECT YOURSELF FROM LIGHTNING STAY OFF THE PHONE AND DONT USE HAND HELD ELECTRICAL APPLIANCES. MOTORISTS SHOULD NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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 May 6, 3:10 PM CDT, 3 hours 26 minutes earlier.
Area forecast discussion, May 6, 3:10 PM CDT, 3 hours 26 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 310 PM CDT WED MAY 6 1998 MADE A QUICK UPDATE TO GOING AFTN ZONE PACKAGE TO REFLECT INCREASING THREAT OF SVR TSTMS ALG KS BORDER. UPR JET SWINGING IN LATE TODAY IN ADDITION TO INCRSG SHORTWAVE ENERGY AND WKNG CAP. RAISED POPS A BIT NRN AREAS FOR TONIGHT AS MODELS IN BETTER AGREEMENT IN DVLPG CONVECTION ACRS ERN KS/SWRN MO LATE TONIGHT AND CLIPPING OUR NRN ZONE GROUPS. IN AFTN PACKAGE...WL KEEP TREND OF SLIGHTLY HIR POPS IN THE NRN ZONES (CLOSER TO BETTER UPR SUPPORT AND ENERGY)...HOWEVER CIRCLN ARND SHORTWAVE SHUD SHOVE LLVL BNDRY A BIT FARTHER TO THE SE TONIGHT. CAP STRONGER DOWN SOUTH...HOWEVER BNDRY MAY FOCUS ACTIVITY IN THE OVERNIGHT HRS...SO WL INTRODUCE SOME LOW POPS SWD. SHORTWAVE SHUD PASS TO THE EAST EARLY IN THE MORNING...WITH SFC BNDRY SETTLING INTO THE SERN ZONES. BY MIDDAY...BNDRY SHUD MOVE INTO SERN TX WITH LLVL MSTR SHALLOWING OUT ACRS FCST AREA. HOWEVER...WITH MIDLVL CAP WEAKENING A BIT (IN RESPONSE TO MIDLVL COOLING BY PASSING SHORTWAVE TONIGHT) MAY MENTION ISOLD TSTMS TOMORROW AFTN AS WE WARM IN AFTN SUNSHINE. NEXT REAL SGFNT SHOT AT RAIN TO COME FRI INTO SAT. CANNOT ARGUE MUCH WITH AVN/MRF SOLNS OF EJECTING LOW FROM SWRN US ACRS FCST AREA SAT MORNING. LLVL REFLECTION WL FORM ALG STALLED SFC BNDRY ACRS NRN TX FRI AFTN...PULLING MSTR ACRS SFC BNDRY INTO ERN OK/WRN AR. SFC-850 MB FIELDS FROM MRF SUGGEST ISENTROPIC LIFT WL BE THE STRONGEST FRI NIGHT...ENDING MIDDAY SAT. BNDRY SHUD RETREAT SE OF AREA LATE SAT AFTN WITH CLEARING SKIES EXPECTED SUNDAY. UPDATED FCST ALREADY OUT. REGULAR PACKAGE TO COME BETWEEN 4 AND 430 PM. FCSTID = 14 SORRY FOLKS...DON`T HAVE TIME TO COMPUTE PRELIM NUMBERS ATTM. .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, May 6, 1:00 PM CDT, 5 hours 36 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-071100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT WED MAY 6 1998 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND TONIGHT ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS MAINLY ALONG AND NORTH OF A MCALESTER TO FORT SMITH LINE. EARLY THIS AFTERNOON...A SURFACE LOW WAS LOCATED OVER SOUTHWEST OKLAHOMA WITH A STATIONARY FRONT THROUGH EASTERN OKLAHOMA INTO NORTHWEST ARKANSAS. AREAS OF CLOUDS REMAIN ACROSS MUCH OF THE AREA...ALTHOUGH SOME BREAKS HAVE BEEN OCCURING...ESPECIALLY ACROSS SOUTHEAST OKLAHOMA. WITH AFTERNOON HEATING AND SURFACE DEWPOINTS IN THE MID 60S TO LOWER 70S...THE ATMOSPHERE IS EXPECTED TO BECOME VERY UNSTABLE. HOWEVER...A CAP OF WARM AIR ALOFT ACROSS NORTHERN TEXAS WILL MOVE INTO SOUTHEAST OKLAHOMA WHICH MAY PREVENT THUNDERSTORM DEVELOPMENT FOR MUCH OF THE AFTERNOON. AT THIS TIME...IT IS UNCERTAIN WHETHER THE CAP WILL BE BROKEN. IF THE CLOUDS CLEAR MORE...SUFFICIENT HEATING MAY BREAK THE CAP AND A FEW THUNDERSTORMS WILL BE POSSIBLE BY LATE AFTERNOON MAINLY ACROSS PARTS OF SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. ANY THUNDERSTORMS THAT FORM IN THIS AREA WILL CONTINUE INTO THE EARLY EVENING BEFORE WEAKENING SHORTLY AFTER SUNSET. IN ADDITION...THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON ACROSS PORTIONS OF SOUTHWEST AND SOUTH CENTRAL KANSAS AS AN UPPER LEVEL DISTURBANCE APPROACHES. THESE THUNDERSTORMS SHOULD THEN MOVE EAST- SOUTHEAST ACROSS NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS THIS EVENING AND OVERNIGHT. GIVEN THE AMOUNT OF INSTABILITY FORECAST ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS...ANY THUNDERSTORMS THAT DO DEVELOP MAY BECOME SEVERE WITH LARGE HAIL BEING THE MAIN THREAT. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS SHOULD LISTEN FOR THE LATEST FORECASTS AND BE PREPARED FOR POSSIBLE ACTIVATION LATE THIS AFTERNOON OR TONIGHT.
Special weather statement, May 6, 1:00 PM CDT, 5 hours 36 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-071100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT WED MAY 6 1998 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND TONIGHT ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS MAINLY ALONG AND NORTH OF A MCALESTER TO FORT SMITH LINE. EARLY THIS AFTERNOON...A SURFACE LOW WAS LOCATED OVER SOUTHWEST OKLAHOMA WITH A STATIONARY FRONT THROUGH EASTERN OKLAHOMA INTO NORTHWEST ARKANSAS. AREAS OF CLOUDS REMAIN ACROSS MUCH OF THE AREA...ALTHOUGH SOME BREAKS HAVE BEEN OCCURING...ESPECIALLY ACROSS SOUTHEAST OKLAHOMA. WITH AFTERNOON HEATING AND SURFACE DEWPOINTS IN THE MID 60S TO LOWER 70S...THE ATMOSPHERE IS EXPECTED TO BECOME VERY UNSTABLE. HOWEVER...A CAP OF WARM AIR ALOFT ACROSS NORTHERN TEXAS WILL MOVE INTO SOUTHEAST OKLAHOMA WHICH MAY PREVENT THUNDERSTORM DEVELOPMENT FOR MUCH OF THE AFTERNOON. AT THIS TIME...IT IS UNCERTAIN WHETHER THE CAP WILL BE BROKEN. IF THE CLOUDS CLEAR MORE...SUFFICIENT HEATING MAY BREAK THE CAP AND A FEW THUNDERSTORMS WILL BE POSSIBLE BY LATE AFTERNOON MAINLY ACROSS PARTS OF SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. ANY THUNDERSTORMS THAT FORM IN THIS AREA WILL CONTINUE INTO THE EARLY EVENING BEFORE WEAKENING SHORTLY AFTER SUNSET. IN ADDITION...THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON ACROSS PORTIONS OF SOUTHWEST AND SOUTH CENTRAL KANSAS AS AN UPPER LEVEL DISTURBANCE APPROACHES. THESE THUNDERSTORMS SHOULD THEN MOVE EAST- SOUTHEAST ACROSS NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS THIS EVENING AND OVERNIGHT. GIVEN THE AMOUNT OF INSTABILITY FORECAST ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS...ANY THUNDERSTORMS THAT DO DEVELOP MAY BECOME SEVERE WITH LARGE HAIL BEING THE MAIN THREAT. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS SHOULD LISTEN FOR THE LATEST FORECASTS AND BE PREPARED FOR POSSIBLE ACTIVATION LATE THIS AFTERNOON OR TONIGHT.
Special weather statement, May 6, 3:00 PM CDT, 3 hours 36 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-071100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE TULSA OK 300 PM CDT WED MAY 6 1998 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND TONIGHT ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS MAINLY ALONG AND NORTH OF A MCALESTER TO FORT SMITH LINE. A TORNADO WATCH IS IN EFFECT UNTIL 9 PM THIS EVENING FOR PORTIONS OF NORTHEAST OKLAHOMA...ALONG AND NORTH OF A BRISTOW TO TULSA TO WAGONER TO JAY LINE. A WEAK EAST TO WEST SURFACE BOUNDARY WAS LOCATED ACROSS FAR SOUTHERN KANSAS THIS AFTERNOON. AFTERNOON HEATING COMBINED WITH SURFACE DEWPOINTS IN THE LOWER TO MID 60S HAVE RESULTED IN THUNDERSTORM DEVELOPMENT ACROSS SOUTHERN KANSAS AND NORTHERN OKLAHOMA. THESE STORMS WILL CONTINUE TO STRENGTHEN AND MAY REACH PORTIONS OF PAWNEE AND OSAGE COUNTIES AFTER 4 PM. THE STORMS SHOULD EVENTUALLY SPREAD THROUGH NORTHEAST OKLAHOMA EARLY THIS EVENING...POSSIBLY MOVING INTO NORTHWEST ARKANSAS BY MID TO LATE EVENING. GIVEN THE DEGREE OF INSTABILITY...LARGE HAIL WILL BE THE PRIMARY SEVERE WEATHER THREAT. HOWEVER...WIND PROFILES ALSO SUGGEST SUPERCELL THUNDERSTORMS ARE POSSIBLE...SO AN ISOLATED TORNADO CANNOT BE RULED OUT. ELSEWHERE...THE CAP OF WARM AIR ALOFT CONTINUES TO SUPPRESS THUNDERSTORM DEVELOPMENT ACROSS SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. THE CAP HAS BEENING WEAKENING...HOWEVER...SO ISOLATED SEVERE THUNDERSTORMS ARE STILL POSSIBLE THROUGH THE EARLY EVENING ACROSS SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS SHOULD LISTEN FOR THE LATEST FORECASTS AND BE PREPARED FOR POSSIBLE ACTIVATION LATE THIS AFTERNOON OR TONIGHT.
Local storm report, May 6, 3:59 PM CDT, 2 hours 37 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
359 PM CDT WED MAY 06 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0321 AM HEAVENER OK .88 INCH HAIL
05/06/98 LE FLORE
0400 AM POTEAU OK FLOODING
05/06/98 LE FLORE HIGH WATER TEMPORARILY
COVERED DEWEY AVENUE
TOWARDS HOSPITALLocal storm report, May 6, 3:59 PM CDT, 2 hours 37 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
359 PM CDT WED MAY 06 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0321 AM HEAVENER OK .88 INCH HAIL
05/06/98 LE FLORE
0400 AM POTEAU OK FLOODING
05/06/98 LE FLORE HIGH WATER TEMPORARILY
COVERED DEWEY AVENUE
TOWARDS HOSPITALThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 1:56 AM CDT | Severe Thunderstorm Warning | TSA | Adair | 49 min |
| May 6, 2:42 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 48 min |
| May 6, 3:26 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 34 min |
| May 6, 3:56 AM CDT | Flash Flood Warning | TSA | LeFlore | 2 hr |
| May 6, 3:59 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 46 min |
| May 6, 4:41 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 49 min |
| May 6, 5:07 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 53 min |
| May 6, 5:26 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 64 min |
| May 6, 5:41 PM CDT | Tornado Warning | TSA | Okmulgee | 49 min |
| May 6, 5:49 PM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 56 min |
| May 6, 5:55 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 65 min |
| May 6, 6:06 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 24 min |
| May 6, 6:11 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Washington | 64 min |
| May 6, 6:14 PM CDT | Tornado Warning | TSA | Muskogee | 46 min |
| May 6, 6:20 PM CDT | Tornado Warning | TSA | Nowata, Washington | 40 min |
| May 6, 6:29 PM CDT | Tornado Warning | TSA | McIntosh | 61 min |
| May 6, 6:38 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 52 min |
| May 6, 6:43 PM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers, Wagoner | 77 min |
| May 6, 6:54 PM CDT | Flash Flood Warning | TSA | Tulsa | 3 hr |
| May 6, 6:59 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 61 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.