Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 32, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Mar 30, 1998, 2:21 PM CST for Osage County, Pawnee County, Oklahoma. It was in force for 54 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
- Mar 30, 1998, 2:21 PM CST (20:21 UTC)
- Expired
- Mar 30, 1998, 3:15 PM CST
- In force
- 54 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties Osage County, OK, Pawnee County, OK
The radar
The Tulsa radar (KINX), 94 km from the middle of the area, began a volume at 20:24 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 |
|---|---|---|---|
| Mar 30, 3:00 PM CST | Hail 0.75 | 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 |
|---|---|---|---|
| Mar 30, 1:00 PM CST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lamont, OK (KLMN), launched 12:00Z, 8.4 hours before the alert went out and 85 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
- 332 J/kg
- Mixed-layer CIN
- -290 J/kg
- Mixed-layer LCL
- 949 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 284 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 302021 RRA SVRTUL OKC113-117-302115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 221 PM CST MON MAR 30 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHEASTERN OKLAHOMA ...WESTERN OSAGE COUNTY ...WESTERN PAWNEE COUNTY AT 2 17 PM A LINE OF SEVERE THUNDERSTORMS WAS LOCATED FROM JUST EAST OF PONCA CITY TO JUST WEST OF MERAMEC. MOVEMENT WAS TO THE NORTHEAST AT 60 MILES AN HOUR. PAWNEE AND BURBANK ARE IN THE PATH OF THESE STORMS. HAIL TO THE SIZE OF DIMES 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 Mar 30, 5:00 AM CST, 9 hours 21 minutes earlier.
Area forecast discussion, Mar 30, 5:00 AM CST, 9 hours 21 minutes before
FPUS3 KTUL 301111 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 500 AM CST MON MAR 30 1998 I GOT A REALLY BAD FEELING ABOUT THIS ONE. TSRA HAVE DEVELOPED ALONG THE COLD FRONT MAINLY IN KS OVERNIGHT. HOWEVER...SOME STORMS DID DEVELOP IN NW OK AND THE NRN TX PANHANDLE AND PUSHED THE COLD FRONT INTO NW OK BEFORE DYING. A FEW STORMS DEVELOPED BRIEFLY ALONG THE DRYLINE IN W TX OVERNIGHT...BUT NO SIGNIFICANT EASTWARD MOVEMENT HAS BEEN NOTED AT THIS POINT. MODELS ARE NOT IN VERY GOOD AGREEMENT WITH THE MOVEMENT OF THE COLD FRONT AND DRYLINE. THE ETA IS VERY AGGRESSIVE IN ERODING THE CAP OVER THE AREA AND MOVING THE DRYLINE EASTWARD ACROSS E OK TODAY. THE AVN AND NGM ARE SLOWER...BUT THE NGM IS ALREADY TOO FAR NORTH WITH ITS SURFACE LOW. THE MODELS ARE IN FAIRLY GOOD AGREEMENT PRODUCING CONSIDERABLE RAINFALL FOR WRN AR/EXTM E OK TONIGHT...BUT THE PROBLEM IS WHAT WILL HAPPEN IN THE MEANTIME. TWO THINGS HAVE TO HAPPEN FOR TSRA TO OCCUR TODAY...THE CAP MUST DISAPPEAR AND THE DRYLINES GOT TO GET MOVING. IF DRYLINE PUSHES EAST WITH THE CAP IN PLACE...WRN ZONES MAY NOT SEE A DROP OF RAIN. IF DRYLINE SLOWLY DRIFTS EASTWARD...BIG STORMS COULD OCCUR LATE THIS AFTERNOON OVER E OK AND SPREAD EASTWARD OVER THE REST OF THE AREA. WILL HEDGE AND SPRINKLE 60 POPS OVER THE ENTIRE AREA TODAY AS WAS PREVIOUSLY FORECAST. WILL ALSO MENTION SEVERE IN ALL ZONES AND HEAVY RAIN IN ERN ZONES THIS AFTERNOON. WILL TREND FROM CHANCE POPS OVER TUL/BVO TO CATEGORICAL OVER FSM TONIGHT...WITH SEVERE THREAT AND HEAVY RAIN POSSIBLE IN ERN ZONES. THE DRYLINE SHOULD BRING SOME CLEARING IN WRN ZONES TONIGHT...BUT WARM/MOIST SECTOR IS EXPECTED TO LINGER THROUGH THE NIGHT IN FAR ERN ZONES. SHRA MAY LINGER A BIT OVER ERN ZONES TUES MORNING...AS STORM SYSTEM MOVES NORTHEAST OUT OF THE AREA. BEHIND THE SYSTEM...SHOULD SEE DECENT WARM UP TUESDAY THANKS TO SIGNIFICANT WESTERLY COMPONENT TO THE WINDS AND SOME DECENT SUNSHINE. WEDNESDAY SHOULD BE DRY BEFORE NEXT SYSTEM SHOWS UP ON THURSDAY. GIVEN UNCERTAINTIES IN POP FORECAST...TEMPS ARE TROUBLESOME. GENERALLY WENT TOWARD COOLER FAN NUMBERS. THE EXCEPTION IS ON TUESDAY...WHEN WARMER FWC TEMPS LOOK MORE REASONABLE. FCSTID = 19 TUL 72 47 69 41 / 60 40 10 0 FSM 77 53 70 41 / 60 80 20 0 MLC 74 49 72 41 / 60 60 10 0 BVO 70 46 67 38 / 60 40 10 0 FYV 76 53 65 38 / 60 70 20 0 IDB 76 52 75 42 / 60 80 20 0 BYV 76 53 65 38 / 60 70 20 0 MIO 73 50 66 38 / 60 60 20 0 MKO 72 47 69 41 / 60 40 10 0 F10 72 47 69 41 / 60 40 10 0 HHW 74 49 72 41 / 60 60 10 0 .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, Mar 30, 1:00 PM CST, 1 hour 21 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-311200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CST MON MAR 30 1998 A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND EVENING. A TORNADO WATCH IS IN EFFECT FOR A LARGE PORTION OF EASTERN OKLAHOMA UNTIL 800 PM. SURFACE LOW PRESSURE WAS CENTERED OVER CENTRAL OKLAHOMA EARLY THIS AFTERNOON. A DRYLINE TRAILED SOUTH FROM THE LOW INTO NORTH CENTRAL TEXAS. IN THE MEANTIME...A STRONG UPPER LEVEL STORM SYSTEM CENTERED OVER THE SOUTHERN ROCKIES THIS MORNING WILL MOVE SLOWLY NORTHEASTWARD INTO WESTERN KANSAS THIS EVENING. THE AIRMASS EAST OF THE DRYLINE HAS BECOME VERY UNSTABLE EARLY THIS AFTERNOON. AT THE SAME TIME...THE LAYER OF WARM AIR ALOFT WHICH HAD BEEN CAPPING ANY CONVECTIVE DEVELOPMENT HAS WEAKENED. DUE TO THE STRENGTH OF THE APPROACHING STORM SYSTEM...A SIGNIFICANT SEVERE WEATHER EVENT APPEARS POSSIBLE. EARLY THIS AFTERNOON...STRONG THUNDERSTORMS HAD ALREADY DEVELOPED IN PARTS OF CENTRAL OKLAHOMA. THERE IS A CHANCE OF SUPERCELL DEVELOPMENT THIS AFTERNOON WEST OF HIGHWAY 75 IN EASTERN OKLAHOMA. LATER THIS EVENING...THE STORMS WILL ORGANIZE INTO A LINE. IF THEY ORGANIZE INTO A SOLID LINE...THE CHANCES FOR A SUPERCELL WOULD DECREASE. NEVERTHELESS...THERE IS A MODERATE TO HIGH POTENTIAL FOR THESE STORMS TO BECOME SEVERE. DAMAGING WINDS...LARGE HAIL AND TORNADOES WILL ALL BE POSSIBLE WITH THE STORMS GIVEN THE FORECAST WIND PROFILES. DURING THE NIGHTTIME HOURS...INSTABILITY WILL BE LESSENING DUE TO THE LOSS OF DAYTIME HEATING AND WEAKENING OF THE DRYLINE. HOWEVER...A FEW SEVERE THUNDERSTORMS WILL STILL LIKELY OCCUR IN NORTHWEST ARKANSAS AND EXTREME EASTERN OKLAHOMA. AGAIN THESE STORMS MAY PRODUCE DAMAGING WINDS...LARGE HAIL AND ISOLATED TORNADOES. THE SEVERE WEATHER THREAT SHOULD END BEFORE 300 AM AS THE UPPER LEVEL STORM LIFTS NORTHEAST AWAY FROM THE AREA. EMERGENCY MANAGEMENT OFFICIALS AND STORM SPOTTER GROUPS IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD PAY CLOSE ATTENTION TO THE WEATHER SITUATION THIS AFTERNOON AND TONIGHT.
Special weather statement, Mar 30, 1:00 PM CST, 1 hour 21 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-311200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CST MON MAR 30 1998 A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND EVENING. A TORNADO WATCH IS IN EFFECT FOR A LARGE PORTION OF EASTERN OKLAHOMA UNTIL 800 PM. SURFACE LOW PRESSURE WAS CENTERED OVER CENTRAL OKLAHOMA EARLY THIS AFTERNOON. A DRYLINE TRAILED SOUTH FROM THE LOW INTO NORTH CENTRAL TEXAS. IN THE MEANTIME...A STRONG UPPER LEVEL STORM SYSTEM CENTERED OVER THE SOUTHERN ROCKIES THIS MORNING WILL MOVE SLOWLY NORTHEASTWARD INTO WESTERN KANSAS THIS EVENING. THE AIRMASS EAST OF THE DRYLINE HAS BECOME VERY UNSTABLE EARLY THIS AFTERNOON. AT THE SAME TIME...THE LAYER OF WARM AIR ALOFT WHICH HAD BEEN CAPPING ANY CONVECTIVE DEVELOPMENT HAS WEAKENED. DUE TO THE STRENGTH OF THE APPROACHING STORM SYSTEM...A SIGNIFICANT SEVERE WEATHER EVENT APPEARS POSSIBLE. EARLY THIS AFTERNOON...STRONG THUNDERSTORMS HAD ALREADY DEVELOPED IN PARTS OF CENTRAL OKLAHOMA. THERE IS A CHANCE OF SUPERCELL DEVELOPMENT THIS AFTERNOON WEST OF HIGHWAY 75 IN EASTERN OKLAHOMA. LATER THIS EVENING...THE STORMS WILL ORGANIZE INTO A LINE. IF THEY ORGANIZE INTO A SOLID LINE...THE CHANCES FOR A SUPERCELL WOULD DECREASE. NEVERTHELESS...THERE IS A MODERATE TO HIGH POTENTIAL FOR THESE STORMS TO BECOME SEVERE. DAMAGING WINDS...LARGE HAIL AND TORNADOES WILL ALL BE POSSIBLE WITH THE STORMS GIVEN THE FORECAST WIND PROFILES. DURING THE NIGHTTIME HOURS...INSTABILITY WILL BE LESSENING DUE TO THE LOSS OF DAYTIME HEATING AND WEAKENING OF THE DRYLINE. HOWEVER...A FEW SEVERE THUNDERSTORMS WILL STILL LIKELY OCCUR IN NORTHWEST ARKANSAS AND EXTREME EASTERN OKLAHOMA. AGAIN THESE STORMS MAY PRODUCE DAMAGING WINDS...LARGE HAIL AND ISOLATED TORNADOES. THE SEVERE WEATHER THREAT SHOULD END BEFORE 300 AM AS THE UPPER LEVEL STORM LIFTS NORTHEAST AWAY FROM THE AREA. EMERGENCY MANAGEMENT OFFICIALS AND STORM SPOTTER GROUPS IN EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD PAY CLOSE ATTENTION TO THE WEATHER SITUATION THIS AFTERNOON AND TONIGHT.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 3:11 PM CST | Severe Thunderstorm Warning | TSA | Osage | 64 min |
| Mar 30, 4:04 PM CST | Severe Thunderstorm Warning | TSA | Okfuskee | 56 min |
| Mar 30, 4:15 PM CST | Severe Thunderstorm Warning | TSA | Osage | 45 min |
| Mar 30, 5:06 PM CST | Severe Thunderstorm Warning | TSA | McIntosh, Pittsburg | 39 min |
| Mar 30, 5:19 PM CST | Severe Thunderstorm Warning | TSA | Okfuskee, Okmulgee | 41 min |
| Mar 30, 5:37 PM CST | Severe Thunderstorm Warning | TSA | McIntosh, Pittsburg | 53 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.