Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 554, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Dec 2, 1999, 9:04 PM CST for Creek County, Tulsa County, Oklahoma. It was in force for 56 min. 6 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
- Dec 2, 1999, 9:04 PM CST (03:04 UTC)
- Expired
- Dec 2, 1999, 10:00 PM CST
- In force
- 56 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Creek County, OK, Tulsa County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 2, 9:17 PM CST | Hail 0.88 | Bristow, OK | |
| Dec 2, 9:25 PM CST | Thunderstorm Wind | Mannford, OK | Thunderstorm winds caused tranformers to pop. |
| Dec 2, 9:33 PM CST | Hail 0.88 | Bristow, OK | |
| Dec 2, 9:45 PM CST | Hail 0.75 | Kellyville, OK | Dime size hail fell at Heyburn State Park. |
| Dec 2, 9:45 PM CST | Hail 1 | Bristow, OK | |
| Dec 2, 9:57 PM CST | Thunderstorm Wind 52 | Tulsa, 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 |
|---|---|---|---|
| Dec 2, 4:30 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
| Dec 2, 7:30 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 3.1 hours before the alert went out and 137 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
- 1310 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1013 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 030307 RRA SVRTUL OKC037-143-030400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 904 PM CST THU DEC 2 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CREEK COUNTY IN NORTHEAST OKLAHOMA WESTERN TULSA COUNTY IN NORTHEAST OKLAHOMA * UNTIL 1000 PM CST * AT 904 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS FROM NEAR SILVER CITY TO NEAR MILFAY...MOVING NORTHEAST AT 35 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...SAPULPA... KELLYVILLE...MANNFORD...OILTON...DRUMRIGHT...SHAMROCK...DEPEW...SLICK ...BRISTOW...AND SAND SPRINGS HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA.
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 Dec 2, 8:17 PM CST, 47 minutes earlier.
Area forecast discussion, Dec 2, 8:17 PM CST, 47 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 817 PM CST THU DEC 2 1999 UPDATED ZONES HAVE ALREADY BEEN SENT. THE UPDATE REFLECTS NEW SEVERE THUNDERSTORM WATCH AND ALSO DELAYED ENDING OF THUNDERSTORMS UNTIL EARLY FRIDAY MORNING MOST ZONES. LARGE SQUALL LINE HAS DEVELOPED ACROSS CENTRAL OKLAHOMA THIS EVENING AND WAS MOVING INTO WESTERN PART OF COUNTY WARNING AREA AT THIS TIME. MAIN THREAT OVERNIGHT WILL BE DAMAGING WIND GUSTS...ALTHOUGH WE WILL HAVE TO WATCH CLOSELY FOR SUPERCELLS IN ANY STORMS AHEAD OF THE LINE SINCE LOW LEVEL WINDS HAVE BACKED AND SHEAR REMAINS STRONG. NO CHANGES WERE MADE TO LATER PERIODS OF FORECAST. FCSTID = 9 .TUL... AR...NONE. OK...SEVERE THUNDERSTORM WATCH UNTIL 1000 PM THIS EVENING FOR ZONES OKZ049...OKZ053...OKZ060...OKZ064>067...OKZ070>071...OKZ073>075. SEVERE THUNDERSTORM WATCH UNTIL 100 AM CST FRIDAY FOR ZONES OKZ054>063.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 2, 8:07 PM CST | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 53 min |
| Dec 2, 8:45 PM CST | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 60 min |
| Dec 2, 9:20 PM CST | Severe Thunderstorm Warning | TSA | Nowata, Rogers, Tulsa, Washington | 40 min |
| Dec 2, 9:25 PM CST | Severe Thunderstorm Warning | TSA | Nowata, Rogers, Washington | 50 min |
| Dec 2, 9:25 PM CST | Severe Thunderstorm Warning | TSA | Tulsa | 50 min |
| Dec 2, 9:43 PM CST | Severe Thunderstorm Warning | TSA | Creek, Osage | 32 min |
| Dec 2, 10:11 PM CST | Severe Thunderstorm Warning | TSA | Nowata, Rogers, Tulsa | 64 min |
| Dec 2, 10:11 PM CST | Severe Thunderstorm Warning | TSA | Creek, Okfuskee, Okmulgee | 64 min |
| Dec 2, 10:48 PM CST | Severe Thunderstorm Warning | TSA | Delaware | 42 min |
| Dec 2, 11:21 PM CST | Severe Thunderstorm Warning | TSA | Mayes, Muskogee, Wagoner | 39 min |
| Dec 2, 11:58 PM CST | Severe Thunderstorm Warning | TSA | Cherokee, Muskogee, Wagoner | 62 min |
| Dec 3, 12:22 AM CST | Severe Thunderstorm Warning | TSA | Latimer, LeFlore | 68 min |
| Dec 3, 12:54 AM CST | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Sequoyah | 51 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1999Every severe thunderstorm warning 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.