Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 352, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jun 21, 1998, 12:24 AM CDT for Osage County, Oklahoma. It was in force for 66 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
- Jun 21, 1998, 12:24 AM CDT (05:24 UTC)
- Expired
- Jun 21, 1998, 1:30 AM CDT
- In force
- 66 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Osage County, OK
The radar
The Tulsa radar (KINX), 90 km from the middle of the area, began a volume at 05:27 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 |
|---|---|---|---|
| Jun 21, 1:15 AM CDT | Thunderstorm Wind | Fairfax, OK | Several trees were blown down, and 12 power poles were blown down. |
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 |
|---|---|---|---|
| Jun 20, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 5.4 hours before the alert went out and 181 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
- 2183 J/kg
- Mixed-layer CIN
- -239 J/kg
- Mixed-layer LCL
- 2070 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
789 WUUS54 KTSA 210525 RRA SVRTUL OKC113-210630- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1224 AM CDT SUN JUN 21 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... OSAGE COUNTY IN NORTHEASTERN OKLAHOMA * UNTIL 130 AM CDT * AT 1225 AM...NATIONAL WEATHER SERVICE RADAR DETECTED A LINE OF SEVERE THUNDERSTORMS FROM FAIRFAX TO PONCA CITY...MOVING EAST AT 20 MPH. * SOME LOCATIONS AFFECTED INCLUDE... FAIRFAX RURAL AREAS SOUTH OF PONCA CITY HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
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 Jun 20, 9:50 PM CDT, 2 hours 34 minutes earlier.
Area forecast discussion, Jun 20, 9:50 PM CDT, 2 hours 34 minutes before
FPUS3 KTUL 210253 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 950 PM CDT SAT JUN 20 1998 ZONES HAVE BEEN UPDATED TO ADD CHANCE POPS FOR MOST ZONES AND TO TWEAK WINDS AND TEMPS. COLD FRONT HAS FIRED UP OVER SE KANSAS AND THESE STORMS IF THEY SURVIVE WILL EVENTUALLY MOVE SOUTHEASTWARD OVER MUCH OF NE OK AND NW AR BY LATE TONIGHT. THE STORMS WILL LIKELY DEVELOP INTO A COMPLEX WHICH WOULD BRING A DECENT CHANCE OF SEVERE WEATHER TO THE AREA IN THE FORM PRIMARILY OF DAMAGING STRAIGHT-LINE WINDS. THE FRONT AND POSSIBLE PRECIP WILL PLAY HAVOC WITH LOW TEMPS. ...19... .TUL... OK...HEAT ADVISORY FOR TONIGHT THROUGH SUNDAY NIGHT FOR ZONES OKZ049...OKZ053>056...OKZ059>061...OKZ064>067...OKZ070>077. AR...HEAT ADVISORY FOR TONIGHT THROUGH SUNDAY NIGHT FOR ZONES ARZ019>020...ARZ029.
In the hours before
Local storm report, Jun 20, 9:57 PM CDT, 2 hours 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
957 PM CDT SAT JUN 20 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0855 PM JENNINGS OK NON TSTM WINDS
06/20/98 PAWNEE A DRY MICROBURST OCCURRED
FROM THE REMNANT ANVIL OF
A DISSIPATED THUNDERSTORM.
SEVERAL LARGE TREE LIMBS
WERE BLOWN DOWN.Local storm report, Jun 20, 10:59 PM CDT, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1059 PM CDT SAT JUN 20 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1035 PM BIXBY OK NON TSTM WINDS
06/20/98 TULSA A MEASURED WIND GUST TO 61
MPH OCCURRED IN BIXBY.
THIS WIND WAS A DRY
MICROBURST AND RESULTED IN
A 10 DEGREE TEMPERATURE
JUMP TO 95 DEGREESSpecial weather statement, Jun 20, 11:21 PM CDT, 1 hour 3 minutes before
OKZ054-059-060-064-066-067-070-210445- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 1121 PM CDT SAT JUN 20 1998 A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1215 AM FOR OSAGE... PAWNEE...CREEK AND TULSA COUNTIES AND UNTIL 100 AM FOR OKMULGEE... MUSKOGEE AND WAGONER COUNTIES. HIGH LEVEL MOISTURE...ASSOCIATED WITH THE REMNANTS OF EARLIER THUNDERSTORMS...IS CONTRIBUTING TO CONDITIONS FAVORABLE FOR HEAT BURSTS. THESE HEAT BURSTS ARE OCCURRING RANDOMLY ACROSS THE WARNING AREA AND AFFECTING SMALL AREAS...BUT WHEN THEY OCCUR WINDS GUST TO AROUND 60 MPH AND THE TEMPERATURE JUMPS WELL INTO THE 90S AND REACHES NEAR 100 DEGREES AT TIMES. BETWEEN 1020 AND 1040 PM A HEAT BURST OCCURRED IN SOUTH TULSA COUNTY WITH WINDS TO 60 MPH REPORTED IN BIXBY...POWER LINES REPORTED DOWN AT 91ST AND GARNETT IN SOUTHEAST TULSA AND TEMPEATURES NEAR 100 DEGREES REPORTED AT A NUMBER OF SPOTS IN SOUTH TULSA. CONDITIONS WILL REMAIN FAVORABLE FOR HEAT BURSTS IN THE WARNING AREAS. THESE WINDS WILL STRIKE SUDDENLY AND WITHOUT RAIN OR LIGHTNING. DAMAGE TO TREES AND POWER LINES MAY OCCUR. THE GREATEST RISK FOR ADDITIONAL HEAR BURSTS APPEARS TO BE FROM AROUND BROKEN ARROW TO NEAR COWETA AND HASKELL. STAY TUNED TO THIS STATION FOR FURTHER INFORMATION FROM THE NATIONAL WEATHER SERVICE.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 9:28 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee, Okmulgee | 62 min |
| Jun 21, 1:02 AM CDT | Flash Flood Warning | TSA | Osage | 3 hr |
| Jun 21, 1:23 AM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 52 min |
| Jun 21, 1:46 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 59 min |
| Jun 21, 2:09 AM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 36 min |
| Jun 21, 2:17 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 43 min |
| Jun 21, 2:23 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 37 min |
| Jun 21, 2:30 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Wagoner | 60 min |
| Jun 21, 2:30 AM CDT | Severe Thunderstorm Warning | TSA | Rogers, Tulsa | 60 min |
| Jun 21, 2:30 AM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 60 min |
| Jun 21, 2:53 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okmulgee | 37 min |
| Jun 21, 3:02 AM CDT | Severe Thunderstorm Warning | TSA | Mayes | 58 min |
| Jun 21, 3:15 AM CDT | Severe Thunderstorm Warning | TSA | Cherokee, McIntosh, Muskogee | 60 min |
| Jun 21, 3:26 AM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 34 min |
| Jun 21, 3:50 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Delaware | 40 min |
| Jun 21, 4:10 AM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 50 min |
| Jun 21, 4:20 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Delaware | 40 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; radar from the NEXRAD Level II archive.