Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 95, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 14, 1998, 6:10 PM CDT for Osage County, Oklahoma. It was in force for 50 min. 4 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
- Apr 14, 1998, 6:10 PM CDT (23:10 UTC)
- Expired
- Apr 14, 1998, 7:00 PM CDT
- In force
- 50 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 23:12 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 |
|---|---|---|---|
| Apr 14, 6:45 PM CDT | Hail 3 | Burbank, OK | 3" diameter hail caused roof damage and busted windows out of a car about 4 miles east-southeast of Ponca City |
| Apr 14, 6:50 PM CDT | Hail 2 | Burbank, OK | |
| Apr 14, 6:55 PM CDT | Hail 0.75 | Burbank, OK | |
| Apr 14, 7:00 PM CDT | Hail 1.75 | Shidler, 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 |
|---|---|---|---|
| Apr 14, 3:45 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.2 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
- 2302 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
199 WUUS54 KTSA 142312 SVRTUL OKC113-150000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 610 PM CDT TUE APR 14 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEASTERN OKLAHOMA ...EASTERN OSAGE COUNTY AT 607 PM...DOPPLER RADAR SHOWED THREE SEVERE THUNDERSTORMS. ONE NEAR HULAH LAKE...ONE NEAR JENNINGS AND ONE AT RALSTON. ALL THE STORMS WERE MOVING NORTHEAST AT 35 MPH. HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
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 Apr 14, 4:19 PM CDT, 1 hour 51 minutes earlier.
Area forecast discussion, Apr 14, 4:19 PM CDT, 1 hour 51 minutes before
FPUS3 KTUL 142120 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 419 PM CDT TUE APR 14 1998 SVR WX EPISODE BEGINNING TO UNFOLD ACRS THE AREA WITH AN ISOLD SVR STORM ALG DRYLINE IN CNTRL OKLA AND SCTD AREAS OF TCU NEAR DRYLINE UP INTO KS. TOR WATCH BOX ALREADY IN PLACE THIS AFTN...AND EXPCT MORE THRU THE NITE AS CONVECTION INCREASES ALG/AHEAD OF DRYLINE THIS EVE AND SPREADS EWD. GREATEST COVERAGE OF STORMS XPCTD NORTH OF ABOUT INTERSTATE 40...BUT SEVERE PSBL ANYWHERE IN AREA WITH SHEAR PROFILES FAVBL FOR SUPERCELLS AND TORNADOES. SEVERE TSRA MENTIONED IN ALL ZONES FOR TONITE...WITH HIEST POPS ACRS NRN 1/3 OF FCST AREA. STG DRYING JUST ABOVE SURFACE WILL SWEEP ACRS THE AREA TONITE TO THE SOUTH OF THE KS SHORTWV. ANY MORN SHRA/TSRA SHUD BE CONFINED TO EXTREM ERN ZNS WHERE MSTR STILL DEEP ENUF TO SUPPORT CONVECTION UNTIL 14 OR 15Z WEDS MORN. SFC WINDS SHUD QUICKLY VEER TO SW AND W IN ALL AREAS BY EARLY AFTN AS VERY DRY ALF MIXES DOWN TO SFC. COLD FRONT FCST TO MOVE INTO NRN ZONES WEDS EVE AND ACRS MOST OF FCST AREA WEDS NITE/EARLY THURS. ETA TOO FAST WITH FRONTAL MOVMT WITH NGM AND AVN IN DECENT AGREEMENT WITH A SLOWER MVMT. SHUD BE ENUF COLD AIR ALF NEAR LO/MID LVL BAROCLINIC ZONE FOR SOME -SHRA ACRS NRN ZONES WEDS NITE AND THURS...BUT WL KEEP POPS AT 20 FOR NOW GIVEN RELATIVELY DRY LO LVLS. SE OKLA AND WEST CNTRL ARK SHUD REMAIN DRY WEDS NITE AND THURS WITH PTLY CLDY SKIES XPCTD. COOL WEATHER XPCTD BEHIND THE FRONT THURS INTO SAT. WL INTRO SLGT CHC POPS FOR SAT AS A SHORTWV PROGD ACRS THE AREA...BUT FRI AND SUN LOOK DRY. FCSTID = 9 TUL 59 78 49 62 / 60 10 20 20 FSM 58 81 50 70 / 40 20 10 10 MLC 59 80 51 68 / 40 10 10 10 BVO 56 77 47 60 / 70 10 20 20 FYV 58 75 46 64 / 60 20 20 20 IDB 62 84 55 73 / 30 20 10 10 BYV 58 75 46 64 / 60 20 20 20 MIO 58 76 48 61 / 70 10 20 20 MKO 59 78 49 62 / 60 10 20 20 F10 59 78 49 62 / 60 10 20 20 HHW 62 84 55 73 / 30 20 10 10 .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, Apr 14, 1:00 PM CDT, 5 hours 10 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-151200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT TUE APR 14 1998 NUMEROUS SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS EVENING AND TONIGHT. MIDDAY WEATHER MAPS SHOWED A DEEPENING AREA OF SURFACE LOW PRESSURE OVER SOUTHWEST KANSAS...WITH A DRY LINE EXTENDING SOUTH THROUGH WESTERN OKLAHOMA INTO WESTERN TEXAS. SOUTH WINDS HAVE CONTINUED TO INCREASE DURING THE MORNING AND WERE HELPING TO INCREASE LOW LEVEL MOISTURE ACROSS EASTERN OKLAHOMA AND WEST CENTRAL ARKANSAS. SURFACE DEWPOINTS IN THE 60S HAD ADVANCED INTO NORTHEAST OKLAHOMA BY MIDDAY AND WITH CONTINUED HEATING THE AIR MASS WILL BECOME VERY UNSTABLE THIS AFTERNOON. SCATTERED THUNDERSTORMS WILL DEVELOP OVER SOUTHERN KANSAS AND NORTH CENTRAL OKLAHOMA LATE THIS AFTERNOON ALONG THE SLOWLY ADVANCING DRY LINE. AS THE AREA OF LOW PRESSURE MOVES NORTHEAST ACROSS KANSAS...THE DRY LINE WILL ADVANCE SLOWLY EAST ACROSS OKLAHOMA...WITH THUNDERSTORMS ADVANCING INTO EASTERN OKLAHOMA TOWARD EVENING. IT APPEARS THAT THE BEST THREAT OF SEVERE WEATHER IN EASTERN OKLAHOMA WILL BE AFTER DARK. HOWEVER...A FEW STORMS COULD DEVELOP AND MOVE INTO OSAGE AND PAWNEE COUNTIES BY 6 OR 7 PM. THE THREAT FOR SEVERE THUNDERSTORMS WILL SPREAD ACROSS EASTERN OKLAHOMA AND INTO WESTERN ARKANSAS DURING THE EVENING. GIVEN THE AMOUNT OF INSTABILITY AND THE VERTICAL WIND PROFILES... SUPERCELL THUNDERSTORMS WILL BE QUITE LIKELY...AND IT APPEARS THERE WILL BE A POTENTIAL FOR TORNADOES. IN ADDITION...DAMAGING WINDS AND LARGE HAIL ARE ALSO EXPECTED. BY WEDNESDAY MORNING THE SURFACE LOW WILL BE OVER NORTHERN MISSOURI WITH THE DRY LINE ALONG THE OKLAHOMA-ARKANSAS BORDER. THUS...THE THREAT FOR SEVERE THUNDERSTORMS WILL LAST INTO THE EARLY MORNING HOURS WEDNESDAY. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS SHOULD CLOSELY MONITOR THIS DEVELOPING WEATHER SITUATION. SPOTTERS WILL LIKELY NEED TO BE ACTIVATED THIS EVENING...ESPECIALLY AFTER 6 PM.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 5:55 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 50 min |
| Apr 14, 6:35 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 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.