Alert archive / Oklahoma / Tornado Warnings in 1999
Tornado Warning 59, NWS Tulsa, OK
NWS Tulsa, OK issued this tornado warning at May 5, 1999, 6:11 PM CDT for Latimer County, Oklahoma. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 5, 1999, 6:11 PM CDT (23:11 UTC)
- Expired
- May 5, 1999, 7:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Latimer County, OK
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.2 hours before the alert went out and 199 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
- 1741 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- -62 m²/s²
- 0-3 km storm-relative helicity
- 156 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 052314 RRA TORTUL OKC077-060000- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TULSA OK 611 PM CDT WED MAY 5 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * TORNADO WARNING FOR SOUTHERN LATIMER COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 700 PM CDT * AT 611 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG ROTATION 8 MILES SOUTHWEST OF HIGGINS. MOVING EAST AT 30 MPH...THIS DANGEROUS STORM COULD PRODUCE A TORNADO AT ANY TIME. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... DAMON... BENGAL...HIGGINS AND YANUSH IF YOU ARE IN OR NEAR THE PATH OF THIS STORM...TAKE COVER NOW IF NO UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS MOTORISTS IN THE PATH OF THIS STORM SHOULD ABANDON VEHICLES FOR MORE SUBSTANTIAL SHELTER TAKE COVER IN A NEARBY STURDY BUILDING. AS A LAST RESORT...TAKE COVER IN A DITCH OR CULVERT. PROTECT YOUR HEAD AND BODY FROM FLYING DEBRIS
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 May 5, 3:30 PM CDT, 2 hours 41 minutes earlier.
Area forecast discussion, May 5, 3:30 PM CDT, 2 hours 41 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 330 PM CDT WED MAY 5 1999 PROBLEM(S) OF THE DAY: POPS WILL THERE BE SEVERE CONVECTION? CLOSED UPPER-LEVEL LOW NORTH OF THE AREA SHOULD SLOWLY MOVE NORTHEASTWARD TOWARD THE GREAT LAKES REGION OVER THE NEXT 48 HOURS. IN THE MEANTIME...A COUPLE OF TROUGHS ROTATING AROUND IT WILL SWING ACROSS THE AREA WITH VERY COLD AIR ALOFT AND VERY STEEP LAPSE RATES. THIS SHOULD RESULT IN THE DEVELOPMENT OF WIDELY SCATTERED SHOWERS AND THUNDERSTORMS THIS EVENING AND AGAIN TOMORROW AFTERNOON AND EVENING. DUE TO THE EXTREMELY COLD AIR ALOFT...SOME OF THE THUNDERSTORMS MAY BECOME SEVERE WITH LARGE HAIL. THE EFFECTS OF THE UPPER-LOW AND ASSOCIATED COLD POOL SHOULD MOVE OFF TO THE NORTHEAST OF THE AREA BY FRIDAY. OTHERWISE WEST TO NORTHWEST WINDS AND PARTLY CLOUDY SKIES SHOULD BE THE RULE. TEMPERATURES WILL BE SLIGHTLY WARMER THAN GUIDANCE TONIGHT DUE TO STRONGER WINDS THAN GUIDANCE SUGGESTS. A COMPROMISE OF AVAILABLE GUIDANCE WAS USED FOR LATER PERIODS. THE MRF IS LESS AMPLIFIED AND MUCH QUICKER WITH THE NEXT STORM SYSTEM WHICH WOULD BRING A CHANCE OF PRECIPITATION TO THE REGION BY LATE SUNDAY OR MONDAY. HOWEVER...THIS SCENARIO IS NOT VERY WELL SUPPORTED BY OTHER AVAILABLE GUIDANCE. THEREFORE WILL EXPECT THE FORECAST AREA TO REMAIN BETWEEN STORM SYSTEMS AT LEAST THROUGH EARLY NEXT WEEK AND WILL KEEP EXTENDED FORECAST DRY. FCSTID = 19 TUL 51 70 49 74 / 20 20 20 10 FSM 50 73 50 76 / 20 20 20 10 MLC 50 74 46 77 / 20 20 20 10 BVO 48 70 46 73 / 20 20 20 10 FYV 47 69 45 70 / 20 20 20 10 IDB 52 77 48 79 / 20 20 20 10 BYV 47 69 45 70 / 20 20 20 10 MIO 48 69 46 71 / 20 20 20 10 MKO 51 70 49 74 / 20 20 20 10 F10 51 70 49 74 / 20 20 20 10 HHW 52 77 48 79 / 20 20 20 10 .TUL... AR...NONE. OK...NONE. -------------------- EXPERIMENTAL OUTPUT: HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: CHANCE SEVERE THUNDERSTORMS NGM CONFIDENCE: 8 ON A SCALE OF 0 TO 10 ETA CONFIDENCE: 7 ON A SCALE OF 0 TO 10 AVN CONFIDENCE: 8 ON A SCALE OF 0 TO 10 FCST CONFIDENCE: 8 ON A SCALE OF 0 TO 10
In the hours before
Special weather statement, May 5, 1:00 PM CDT, 5 hours 11 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-051100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT WED MAY 5 1999 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND EVENING. .SYNOPSIS... AN UPPER LEVEL LOW PRESSURE SYSTEM WAS CENTERED OVER NORTHEAST NEBRASKA EARLY THIS AFTERNOON. AN UPPER LEVEL DISTURBANCE EXTENDED SOUTHWEST FROM THIS LOW INTO THE TEXAS PANHANDLE. THE LOW WILL MOVE ONLY VERY SLOWLY EAST THROUGH TONIGHT BUT THE DISTURBANCE WILL MOVE EAST ACROSS OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND EVENING. .DISCUSSION... VERY COLD AIR ALOFT ASSOCIATED WITH THE UPPER LEVEL DISTURBANCE WILL SPREAD ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND EVENING. WITH SURFACE TEMPERATURES RISING THROUGH THE 70S...VERY STEEP LAPSE RATES WILL BE PRESENT RESULTING IN MODERATE INSTABILITY. SCATTERED THUNDERSTORMS WILL DEVELOP BY MID AFTERNOON IN NORTHEAST OKLAHOMA AND ADDITIONAL DEVELOPMENT TO THE SOUTH AND EAST WILL OCCUR THROUGH THIS EVENING. THE THUNDERSTORMS WILL BE VERY EFFICIENT HAIL PRODUCERS DUE TO THE VERY COLD AIR ALOFT. DIME TO QUARTER SIZE HAIL WILL BE COMMON WITH THE STRONGER STORMS. STRONG GUSTY WINDS WILL ALSO BE POSSIBLE DUE TO DRY AIR IN THE LOWER LEVELS OF THE ATMOSPHERE. THE DRY LOW LEVEL AIR WILL ALSO KEEP MOST RAINFALL AMOUNTS QUITE LIGHT. AS SURFACE TEMPERATURES BEGIN TO FALL THIS EVENING...THE AIRMASS WILL BECOME MORE STABLE AND THE THREAT OF SEVERE WEATHER WILL END BY MIDNIGHT AND SKIES WILL CLEAR. .EMERGENCY MANAGEMENT AGENCY AND SPOTTER ACTIVATION... EMERGENCY MANAGEMENT OFFICIALS AND STORM SPOTTERS IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS MAY NEED TO BE ACTIVATED LATER THIS AFTERNOON AND EVENING.
Special weather statement, May 5, 1:00 PM CDT, 5 hours 11 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-051100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT WED MAY 5 1999 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND EVENING. .SYNOPSIS... AN UPPER LEVEL LOW PRESSURE SYSTEM WAS CENTERED OVER NORTHEAST NEBRASKA EARLY THIS AFTERNOON. AN UPPER LEVEL DISTURBANCE EXTENDED SOUTHWEST FROM THIS LOW INTO THE TEXAS PANHANDLE. THE LOW WILL MOVE ONLY VERY SLOWLY EAST THROUGH TONIGHT BUT THE DISTURBANCE WILL MOVE EAST ACROSS OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND EVENING. .DISCUSSION... VERY COLD AIR ALOFT ASSOCIATED WITH THE UPPER LEVEL DISTURBANCE WILL SPREAD ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND EVENING. WITH SURFACE TEMPERATURES RISING THROUGH THE 70S...VERY STEEP LAPSE RATES WILL BE PRESENT RESULTING IN MODERATE INSTABILITY. SCATTERED THUNDERSTORMS WILL DEVELOP BY MID AFTERNOON IN NORTHEAST OKLAHOMA AND ADDITIONAL DEVELOPMENT TO THE SOUTH AND EAST WILL OCCUR THROUGH THIS EVENING. THE THUNDERSTORMS WILL BE VERY EFFICIENT HAIL PRODUCERS DUE TO THE VERY COLD AIR ALOFT. DIME TO QUARTER SIZE HAIL WILL BE COMMON WITH THE STRONGER STORMS. STRONG GUSTY WINDS WILL ALSO BE POSSIBLE DUE TO DRY AIR IN THE LOWER LEVELS OF THE ATMOSPHERE. THE DRY LOW LEVEL AIR WILL ALSO KEEP MOST RAINFALL AMOUNTS QUITE LIGHT. AS SURFACE TEMPERATURES BEGIN TO FALL THIS EVENING...THE AIRMASS WILL BECOME MORE STABLE AND THE THREAT OF SEVERE WEATHER WILL END BY MIDNIGHT AND SKIES WILL CLEAR. .EMERGENCY MANAGEMENT AGENCY AND SPOTTER ACTIVATION... EMERGENCY MANAGEMENT OFFICIALS AND STORM SPOTTERS IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS MAY NEED TO BE ACTIVATED LATER THIS AFTERNOON AND EVENING.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:48 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 42 min |
| May 4, 8:24 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Washington | 51 min |
| May 4, 8:48 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 42 min |
| May 5, 6:06 PM CDT | Tornado Warning | TSA | Pittsburg | 24 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; the sounding from the Mesonet's radiosonde archive.