Alert archive / Oklahoma / Tornado Warnings in 1999
Tornado Warning 11, NWS Tulsa, OK
NWS Tulsa, OK issued this tornado warning at Mar 8, 1999, 6:42 PM CST for Haskell County, Muskogee County, Sequoyah County, Oklahoma. It was in force for 48 min. 2 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Mar 8, 1999, 6:42 PM CST (00:42 UTC)
- Expired
- Mar 8, 1999, 7:30 PM CST
- In force
- 48 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Haskell County, OK, Muskogee County, OK, Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 62 km from the middle of the area, began a volume at 00:45 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 8, 6:43 PM CST | Tornado F0 | Shady Grove, OK | The same parent thunderstorm that spawned the earlier tornado further west in McIntosh County again spawned a brief tornado touchdown about three miles west of Warner in far eastern McIntosh County. No damage was reported with this touchdown. |
| Mar 8, 6:59 PM CST | Hail 0.88 | Gore, 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 |
|---|---|---|---|
| Mar 8, 3:30 PM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 0.7 hours before the alert went out and 194 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
- 535 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 315 m²/s²
- 0-3 km storm-relative helicity
- 291 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS54 KTSA 090045 RRA TORTUL OKC061-101-135-090130- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TULSA OK 642 PM CST MON MAR 8 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * TORNADO WARNING FOR MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA SEQUOYAH COUNTY IN EAST CENTRAL OKLAHOMA HASKELL COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 730 PM CST * AT 642 PM CST STORM SPOTTERS REPORTED A TORNADO EAST OF CHECOTAH NORTH OF I-40 4 MILES SOUTHWEST OF WARNER...MOVING EAST AT 40 MPH. * LOCATIONS NEAR THE PATH OF THIS TORNADO INCLUDE WEBBERS FALLS... WARNER...PORUM...MOFFETT...BRUSHY...VIAN...ROLAND...MULDROW... GANS...SALLISAW AND TAMAHA LAT...LON 3552 9540 3534 9540 3532 9444 3557 9444
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Mar 8, 3:45 PM CST, 2 hours 57 minutes earlier.
Area forecast discussion, Mar 8, 3:45 PM CST, 2 hours 57 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 345 PM CST MON MAR 8 1999 PROBLEM(S) OF THE DAY: WILL THERE BE SEVERE CONVECTION THIS EVENING? 21Z SURFACE ANALYSIS SHOWS LOW PRESSURE OVER SCNTRL KS/NCTRL OK WITH DRYLINE EXTENDING SSEWD INTO SE OK. WARM FRONT IS A BIT ILL-DEFINED...BUT APPEARS TO CUT NW-SE ACROSS ERN OK. WHILE INITIAL BAND OF SHRA/TSRA HAS EXITED FORECAST AREA...WILL NEED TO KEEP AN EYE ON SE OK LATE THIS AFTERNOON/EARLY EVENING AS PARTIAL CLEARING/INCREASING SURFACE DEWPOINTS HAVE ALLOWED FOR DESTABILIZATION IN THE WARM SECTOR. ALREADY SEE ISOLATED ECHOES OVER SE OK ALONG THE DRYLINE...AND THESE COULD EVENTUALLY BECOME SEVERE AS COLDER MID LEVEL TEMPS/IMPRESSIVE 850-500MB LAPSE RATES SPREAD ACROSS THIS AREA. COVERAGE WILL BE LIMITED THOUGH...SO WILL KEEP POPS LOW. WLY/NWLY FLOW/SUBSIDENCE WILL OVERTAKE FORECAST AREA LATER THIS EVENING...WITH DECREASING SKIES. EXPECT A DRY AND MOSTLY SUNNY DAY FOR TUE...WITH SURFACE RIDGE SLIDING OVER ERN OK BY DAYS END. NEXT UPPER SYSTEM PROGD TO MOVE N OF FORECAST AREA WED/WED NIGHT. AVN SHOWS A DECENT RETURN OF LOW-LEVEL MOISTURE...BUT CANT GET TOO EXCITED WITH POPS WITH WLY FLOW ALOFT AND A VERY WEAK SURFACE PATTERN. WILL MAINTAIN 20 POPS FOR WED AND CARRY LOW POPS INTO WED NIGHT. EXTENDED FORECAST BECOMES RATHER MUDDLED FRI INTO SAT. ALL LONG RANGE MODELS SUGGEST THAT A SIGNIFICANT UPPER LOW WILL MOVE INTO THE SRN PLAINS...BUT TIMING DIFFERENCES ABOUND. NOGAPS/ECMWF/UKMET ALL A BIT FASTER THAN MRF WITH UPPER LOW...MOVING SYSTEM INTO KS BY 12Z SAT. MODELS EVEN SUGGEST POSSIBILITY OF FROZEN PRECIP OVER NRN ZONES BY SAT...BUT IT WILL ALL DEPEND ON WHERE SURFACE LOW DEVELOPS AND AMOUNT AVAILABLE LOW-LEVEL COLD AIR. FORECAST CONFIDENCE IS RATHER LOW...BUT WILL INTRODUCE A CHANCE OF RAIN ON FRI...AND A CHANCE OF RAIN OR SNOW OVER NE OK FOR SAT. FCSTID = 18 TUL 36 54 35 61 / 20 0 0 20 FSM 37 58 33 63 / 20 0 0 20 MLC 38 58 36 65 / 20 0 0 20 BVO 36 54 35 61 / 20 0 0 20 FYV 35 50 28 58 / 20 0 0 20 IDB 42 63 34 68 / 30 0 0 20 BYV 35 50 28 58 / 20 0 0 20 MIO 36 52 31 60 / 20 0 0 20 MKO 36 54 35 61 / 20 0 0 20 F10 36 54 35 61 / 20 0 0 20 HHW 42 63 34 68 / 30 0 0 20 .TUL... OK...NONE. AR...NONE. -------------------- EXPERIMENTAL OUTPUT: HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: SLIGHT CHANCE SEVERE THUNDERSTORMS NGM CONFIDENCE: 7 ON A SCALE OF 0 TO 10 ETA CONFIDENCE: 7 ON A SCALE OF 0 TO 10 AVN CONFIDENCE: 7 ON A SCALE OF 0 TO 10 FCST CONFIDENCE: 7 ON A SCALE OF 0 TO 10
In the hours before
Special weather statement, Mar 8, 1:00 PM CST, 5 hours 42 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-061200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CST MON MAR 8 1999 ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE TODAY IN FAR SOUTHEAST OKLAHOMA. .SYNOPSIS... A LINE OF SHOWERS AND THUNDERSTORMS WHICH MOVED ACROSS THE AREA THIS MORNING WAS LOCATED ACROSS WESTERN ARKANSAS AND FAR SOUTHEAST OKLAHOMA. BEHIND THE LINE OF STORMS...WINDS WERE SOUTHERLY BUT TEMPERATURES REMAINED QUITE COOL...WITH READINGS IN THE 40S AND LOWER 50S. WITH THE COOL AIR IN PLACE ACROSS MOST OF THE AREA...THE THREAT OF THUNDERSTORMS AND SEVERE WEATHER HAS DIMINISHED WITH ONLY A SLIGHT CHANCE OF THUNDERSTORMS DEVELOPING ACROSS MOST OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. ALONG THE RED RIVER IN SOUTHEAST OKLAHOMA...THERE WILL BE A SLIGHT CHANCE OF REDEVELOPMENT OF THUNDERSTORMS WHERE TEMPERATURES WILL REACH THE MID 60S AND MODERATELY HIGH AMOUNTS OF LOW LEVEL MOISTURE REMAIN. ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE... MAINLY OVER CHOCTAW AND PUSHMATAHA COUNTIES THROUGH ABOUT 8 PM. (NOTE: OUTLOOKS FOR MCCURTAIN COUNTY ARE ISSUED BY THE NWS IN SHREVEPORT). .DISCUSSION... INSTABILITY REMAINS VERY LOW EARLY THIS AFTERNOON...HOWEVER IN SOUTHCENTRAL OKLAHOMA AND NORTH TEXAS...THE ATMOSPHERE WAS BEGINNING TO DESTABILIZE. A FEW THUNDERSTORMS MAY DEVELOP IN THIS AREA BY 3 PM AND MOVE INTO SOUTHEAST OKLAHOMA LATER THIS AFTERNOON. THERE MAY BE ENOUGH INSTABILITY FOR THESE STORMS TO BECOME SEVERE WITH LARGE HAIL AND GUSTY WINDS. DUE TO THE DECREASED INSTABILITY AND SLIGHTLY WEAKER LOW LEVEL WIND SHEAR...THE THREAT OF TORNADOES HAS DIMINISHED. AREAS WELL TO THE EAST...AHEAD OF THE SQUALL LINE IN NORTHERN LOUISIANA AND EASTERN TEXAS WILL HAVE THE GREATEST THREAT FOR TORNADOES THIS AFTERNOON AND EVENING. .EMERGENCY AGENCY AND SPOTTER ACTIVATION... SPOTTER ACTIVATION DOES NOT APPEAR LIKELY THROUGH TONIGHT...HOWEVER THE LATEST CONDITIONS AND FORECASTS SHOULD BE MONITORED ACROSS FAR SOUTHEAST OKLAHOMA FOR POSSIBLE SEVERE STORM DEVELOPMENT.
Special weather statement, Mar 8, 1:00 PM CST, 5 hours 42 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-061200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CST MON MAR 8 1999 ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE TODAY IN FAR SOUTHEAST OKLAHOMA. .SYNOPSIS... A LINE OF SHOWERS AND THUNDERSTORMS WHICH MOVED ACROSS THE AREA THIS MORNING WAS LOCATED ACROSS WESTERN ARKANSAS AND FAR SOUTHEAST OKLAHOMA. BEHIND THE LINE OF STORMS...WINDS WERE SOUTHERLY BUT TEMPERATURES REMAINED QUITE COOL...WITH READINGS IN THE 40S AND LOWER 50S. WITH THE COOL AIR IN PLACE ACROSS MOST OF THE AREA...THE THREAT OF THUNDERSTORMS AND SEVERE WEATHER HAS DIMINISHED WITH ONLY A SLIGHT CHANCE OF THUNDERSTORMS DEVELOPING ACROSS MOST OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. ALONG THE RED RIVER IN SOUTHEAST OKLAHOMA...THERE WILL BE A SLIGHT CHANCE OF REDEVELOPMENT OF THUNDERSTORMS WHERE TEMPERATURES WILL REACH THE MID 60S AND MODERATELY HIGH AMOUNTS OF LOW LEVEL MOISTURE REMAIN. ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE... MAINLY OVER CHOCTAW AND PUSHMATAHA COUNTIES THROUGH ABOUT 8 PM. (NOTE: OUTLOOKS FOR MCCURTAIN COUNTY ARE ISSUED BY THE NWS IN SHREVEPORT). .DISCUSSION... INSTABILITY REMAINS VERY LOW EARLY THIS AFTERNOON...HOWEVER IN SOUTHCENTRAL OKLAHOMA AND NORTH TEXAS...THE ATMOSPHERE WAS BEGINNING TO DESTABILIZE. A FEW THUNDERSTORMS MAY DEVELOP IN THIS AREA BY 3 PM AND MOVE INTO SOUTHEAST OKLAHOMA LATER THIS AFTERNOON. THERE MAY BE ENOUGH INSTABILITY FOR THESE STORMS TO BECOME SEVERE WITH LARGE HAIL AND GUSTY WINDS. DUE TO THE DECREASED INSTABILITY AND SLIGHTLY WEAKER LOW LEVEL WIND SHEAR...THE THREAT OF TORNADOES HAS DIMINISHED. AREAS WELL TO THE EAST...AHEAD OF THE SQUALL LINE IN NORTHERN LOUISIANA AND EASTERN TEXAS WILL HAVE THE GREATEST THREAT FOR TORNADOES THIS AFTERNOON AND EVENING. .EMERGENCY AGENCY AND SPOTTER ACTIVATION... SPOTTER ACTIVATION DOES NOT APPEAR LIKELY THROUGH TONIGHT...HOWEVER THE LATEST CONDITIONS AND FORECASTS SHOULD BE MONITORED ACROSS FAR SOUTHEAST OKLAHOMA FOR POSSIBLE SEVERE STORM DEVELOPMENT.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 6:14 PM CST | Severe Thunderstorm Warning | TSA | Cherokee, Wagoner | 46 min |
| Mar 8, 6:24 PM CST | Tornado Warning | TSA | McIntosh, Muskogee | 51 min |
| Mar 8, 6:25 PM CST | Severe Thunderstorm Warning | TSA | Delaware, Mayes, Rogers | 50 min |
| Mar 8, 6:44 PM CST | Tornado Warning | TSA | Delaware, Mayes | 46 min |
| Mar 8, 6:50 PM CST | Severe Thunderstorm Warning | TSA | Cherokee, Muskogee | 55 min |
| Mar 8, 6:50 PM CST | Severe Thunderstorm Warning | TSA | Adair | 55 min |
Nearby
Tornado Warnings in Oklahoma, 1999Every tornado warning in 1999Tornadoes in 1999
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; radar from the NEXRAD Level II archive.