Alert archive / Oklahoma / Tornado Warnings in 1999
Tornado Warning 78, NWS Tulsa, OK
NWS Tulsa, OK issued this tornado warning at Jun 1, 1999, 6:41 AM CDT for Haskell County, LeFlore County, Oklahoma. It was in force for 64 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
- Jun 1, 1999, 6:41 AM CDT (11:41 UTC)
- Expired
- Jun 1, 1999, 7:45 AM CDT
- In force
- 64 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Haskell County, OK, LeFlore County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 1, 6:50 AM CDT | Hail 3 | Stigler, OK | |
| Jun 1, 7:30 AM CDT | Hail 0.75 | Bokoshe, 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 nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 11.7 hours before the alert went out and 214 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
- 1985 J/kg
- Mixed-layer CIN
- -200 J/kg
- Mixed-layer LCL
- 1255 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS54 KTSA 011143 RRA TORTUL OKC061-079-011245- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TULSA OK 641 AM CDT TUE JUN 1 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * TORNADO WARNING FOR HASKELL COUNTY IN SOUTHEAST OKLAHOMA NORTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 745 AM CDT * AT 641 AM CDT...RADAR INDICATED A DEVELOPING TORNADO OVER KINTA. THIS DANGEROUS STORM IS MOVING EAST AT 25 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... BOKOSHE...MC CURTAIN...KINTA AND LEQUIRE 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 THIS IS A VERY DANGEROUS STORM. IF YOU ARE NEAR ITS PATH YOU SHOULD PREPARE FOR LARGE DAMAGING HAIL...VIOLENT STRAIGHT LINE WINDS AND POSSIBLY A TORNADO. IF NO UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR ROOM AWAY FROM WINDOWS. IN ADDITION TO THE THREAT OF A TORNADO...LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS CAN BE EXPECTED WITH THIS STORM. GO TO A SAFE PLACE NOW LAT...LON 3525 9523 3509 9527 3501 9476 3521 9472
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 Jun 1, 6:00 AM CDT, 41 minutes earlier.
Area forecast discussion, Jun 1, 6:00 AM CDT, 41 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT TUE JUN 1 1999 PROBLEM(S) OF THE DAY: WILL THERE BE SEVERE CONVECTION? POPS SVR STORMS HAVE KEPT US BUSY. NO DISCUSSION WILL BE ISSUED UNTIL LATER TODAY. FCSTID = 9 TUL 84 64 88 70 / 40 20 10 10 FSM 85 65 89 67 / 50 30 10 10 MLC 83 63 90 71 / 40 20 10 10 BVO 85 61 89 69 / 50 20 10 10 FYV 80 58 84 62 / 60 30 10 10 IDB 86 66 90 68 / 50 30 10 10 BYV 80 58 84 62 / 60 30 10 10 MIO 83 60 86 66 / 40 20 10 10 MKO 84 64 88 70 / 40 20 10 10 F10 84 64 88 70 / 40 20 10 10 HHW 86 66 90 68 / 50 30 10 10 .TUL... AR...NONE. OK...NONE. -------------------- EXPERIMENTAL OUTPUT: HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: CHANCE SEVERE THUNDERSTORMS NGM CONFIDENCE: 7 ON A SCALE OF 0 TO 10 ETA CONFIDENCE: 8 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
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 4:32 AM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 43 min |
| Jun 1, 4:45 AM CDT | Tornado Warning | TSA | Okfuskee | 45 min |
| Jun 1, 5:03 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okmulgee | 57 min |
| Jun 1, 5:12 AM CDT | Tornado Warning | TSA | McIntosh | 63 min |
| Jun 1, 5:53 AM CDT | Tornado Warning | TSA | Haskell, Pittsburg | 67 min |
| Jun 1, 6:04 AM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 41 min |
| Jun 1, 3:56 PM CDT | Severe Thunderstorm Warning | TSA | Delaware, Mayes | 49 min |
| Jun 1, 4:25 PM CDT | Severe Thunderstorm Warning | TSA | Ottawa | 35 min |
| Jun 1, 4:47 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Mayes | 43 min |
| Jun 1, 5:06 PM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 39 min |
| Jun 1, 5:12 PM CDT | Tornado Warning | TSA | Cherokee | 33 min |
| Jun 1, 5:36 PM CDT | Tornado Warning | TSA | Cherokee, Muskogee, Wagoner | 54 min |
| Jun 1, 6:22 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 48 min |
| Jun 1, 6:24 PM CDT | Tornado Warning | TSA | McIntosh, Muskogee | 66 min |
| Jun 1, 6:56 PM CDT | Tornado Warning | TSA | Haskell | 49 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.