Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 423, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Sep 1, 1998, 6:59 PM CDT for Osage County, Oklahoma. It was in force for 46 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
- Sep 1, 1998, 6:59 PM CDT (23:59 UTC)
- Expired
- Sep 1, 1998, 7:45 PM CDT
- In force
- 46 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 00:03 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.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 12.0 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2597 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
537 WUUS54 KTSA 020000 RRA SVRTUL OKC113-020045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 659 PM CDT TUE SEP 1 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... OSAGE COUNTY IN NORTHEASTERN OKLAHOMA * UNTIL 745 PM CDT * AT 657 PM...RADAR DETECTED A SEVERE THUNDERSTORM 2 MILES SOUTH OF PAWHUSKA...MOVING SOUTHEAST AT 10 MPH. * SOME LOCATIONS AFFECTED INCLUDE... PERSHING BARNSDALL HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 60 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 Sep 1, 3:40 PM CDT, 3 hours 19 minutes earlier.
Area forecast discussion, Sep 1, 3:40 PM CDT, 3 hours 19 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 340 PM CDT TUE SEP 1 1998 PROBLEM(S) OF THE DAY: WILL THERE BE CONVECTION? TEMPERATURES LOTS OF UNCERTAINTY IN THE FORECAST TODAY...BUT PERSISTENCE IS STILL THE BEST BET. FIRST PROBLEM IS WHETHER CONVECTION WILL WORK EASTWARD INTO THE FORECAST AREA FROM NORTH CENTRAL OKLAHOMA. MESONET SHOWS CONSIDERABLY MORE CONVERGENCE TO THE WEST WITH VERY WEAK CONVERGENCE IN EASTERN OKLAHOMA. WILL NOT PLAN ON LEAVING ANY EVENING POPS...BUT WILL MONITOR LATEST RADAR TRENDS BEFORE ISSUANCE TIME. T.S. EARL DOES NOT APPEAR AS THOUGH IT WILL AFFECT THE AREA...WITH THE EXCEPTION OF EASTERLY WINDS AND PERHAPS SOME INCREASED HIGH CLOUD IN THE SOUTHERN ZONES. BASICALLY IF EARL EVER GETS THIS FAR NORTH IT WILL LIKELY GET CAUGHT UP IN THE WESTERLIES AND WILL FOREVER REMAIN EAST OF US. BUT THE MOST LIKELY EVENT IS THAT IT WILL EVENTUALLY BE SWEPT WEST OR SOUTHWESTWARD INTO THE TEXAS OR MEXICAN COAST AROUND SOUTH SIDE OF THAT ROCKY MOUNTAIN HIGH. DESPITE THE EAST WINDS EXPECTED TO THE NORTH OF EARL'S CIRCULATION...THE ETA DOES NOT SHOW ANY CONSIDERABLE COOLING AT 850 MB. THEREFORE WILL GO WITH MOSTLY SUNNY SKIES EXCEPT FOR PARTLY CLOUDY IN THE EXTREME SOUTHEAST AND WILL GO WITH PERSISTENCE ON TEMPERATURES THROUGH THIS FORECAST. AS FOR MOS TEMPERATURES...WILL GO WELL ABOVE GUIDANCE FOR HIGHS AND STAY FAIRLY CLOSE TO LOWS. EXTENDED FORECAST IS MUDDLED BY MODELS HANDLING OF EARL...SO THERE IS A LOT OF UNCERTAINTY GOING INTO THE WEEKEND. THERE WILL PROBABLY BE SOME MORE ISOLATED CONVECTION AT SOME POINT LATE IN THE WEEK OR OVER THE WEEKEND...BUT THERE IS LITTLE GO ON FOR POPS AT THIS TIME. ONCE MODELS GET A HANDLE ON EARL HOPEFULLY THE PICTURE WILL CLEAR UP SOME. FCSTID = 19 TUL 67 99 68 99 / 5 5 0 0 FSM 69 98 68 97 / 5 5 5 5 MLC 65 99 67 98 / 5 5 5 5 BVO 64 99 64 99 / 5 5 0 0 FYV 61 91 60 90 / 5 5 0 0 IDB 66 99 67 98 / 5 5 5 5 BYV 61 91 60 90 / 5 5 0 0 MIO 63 97 62 97 / 5 5 0 0 MKO 67 99 68 99 / 5 5 0 0 F10 67 99 68 99 / 5 5 0 0 HHW 66 99 67 98 / 5 5 5 5 .TUL... OK...NONE. AR...NONE. -------------------- EXPERIMENTAL OUTPUT: GENERAL WEATHER EXPECTED NEXT 24 HOURS: NO PRECIP HAZARDOUS WEATHER EXPECTED NEXT 24 HOURS: NONE NGM CONFIDENCE: 6 ON A SCALE OF 0 TO 10 ETA CONFIDENCE: 7 ON A SCALE OF 0 TO 10 AVN CONFIDENCE: 6 ON A SCALE OF 0 TO 10 FCST CONFIDENCE: 8 ON A SCALE OF 0 TO 10
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.