Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 211, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 9, 1998, 3:04 PM CDT for McIntosh County, Pittsburg County, Oklahoma. It was in force for 41 min. 2 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
- May 9, 1998, 3:04 PM CDT (20:04 UTC)
- Expired
- May 9, 1998, 3:45 PM CDT
- In force
- 41 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
Counties McIntosh County, OK, Pittsburg County, OK
The radar
The Tulsa radar (KINX), 115 km from the middle of the area, began a volume at 20:04 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 |
|---|---|---|---|
| May 9, 3:30 PM CDT | Hail 1 | Crowder, OK | |
| May 9, 3:50 PM CDT | Thunderstorm Wind | Blocker, OK | Several trees 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 nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 8.1 hours before the alert went out and 154 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
- 208 J/kg
- Mixed-layer CIN
- -208 J/kg
- Mixed-layer LCL
- 773 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 589 m²/s²
- 0-3 km storm-relative helicity
- 623 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.5
The text
As transmitted, in the capitals the NWS used until 2016.
190 WUUS54 KTSA 092005 RRA SVRTUL OKC091-121-092045- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 304 PM CDT SAT MAY 9 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... MCINTOSH COUNTY - EAST CENTRAL OKLAHOMA NORTHERN PITTSBURG COUNTY - SOUTHEASTERN OKLAHOMA * UNTIL 345 PM CDT * AT 300 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A LINE OF SEVERE THUNDERSTORMS FROM JUST EAST OF DUSTIN TO NEAR SCIPIO... MOVING EAST AT 25 MPH. * SOME LOCATIONS AFFECTED INCLUDE... RAIFORD HANNA INDIANOLA EUFAULA CROWDER HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH. WHEN THUNDERSTORMS APPROACH...TAKE COVER INSIDE A STURDY BUILDING. STAY AWAY FROM WINDOWS. TO PROTECT YOURSELF FROM LIGHTNING STAY OFF THE PHONE AND DONT USE HAND HELD ELECTRICAL APPLIANCES. MOTORISTS SHOULD NEVER DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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 May 9, 10:50 AM CDT, 4 hours 14 minutes earlier.
Area forecast discussion, May 9, 10:50 AM CDT, 4 hours 14 minutes before
FPUS3 KTUL 091554 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1050 AM CDT SAT MAY 9 1998 COMPLEX SFC PATTERN THIS MRNG WITH ONE LOW ACRS NW OK...TRIPLE PT LOW ALG RED RVR WITH WM FNT EXTENDING E THRU NE TX. BAND OF TSRA CONTINUE ACRS ERN OK...WITH ADDITIONAL DVLPMT THE PAST HR ALG LEAD GUST FNT. UPR LOW AND ASSOCD COLD POOL OVR WRN OK WL MV INTO NW AR BY 00Z...SO COULD SEE MORE CONVECTION DVLP LTR THIS AFTN. WL KP HIGHEST POPS AND MENTION OF HVY RN ALG AND N OF TRACK OF H5 LOW. UPDATE SHUD BE OUT BY 1130 AM. 18 .TUL... OK...NONE. AR...NONE.
In the hours before
Special weather statement, May 9, 1:00 PM CDT, 2 hours 4 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT SAT MAY 9 1998 A FEW SEVERE THUNDERSTORMS ARE EXPECTED ACROSS NORTHWEST ARKANSAS THIS AFTERNOON. AT MIDDAY...SURFACE LOW PRESSURE WAS LOCATED OVER SOUTH CENTRAL OKLAHOMA WITH A COLD FRONT TO ITS SOUTH ACROSS CENTRAL TEXAS AND AND WARM FRONT TO ITS SOUTHEAST ACROSS NORTHEAST TEXAS AND LOUISIANA. MEANWHILE...AN UPPER LEVEL LOW PRESSURE SYSTEM WAS LOCATED OVER NORTH CENTRAL OKLAHOMA. THESE SURFACE AND UPPER LEVEL SYSTEMS WILL MOVE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND TO THE EAST OF THE AREA THIS EVENING. ALTHOUGH THE SURFACE INSTABILITY ACROSS THE AREA WILL BE MEAGER...COLD AIR ALOFT ASSOCIATED WITH THE UPPER LEVEL SYSTEM WILL BE SUFFICIENT TO PRODUCE CONSIDERABLE MID LEVEL INSTABILITY. THE MID LEVEL INSTABILITY WILL BE THE GREATEST OVER NORTHWEST ARKANSAS THIS AFTERNOON. THE RESULT WILL BE A FEW SEVERE THUNDERSTORMS. THE MAIN THREAT FROM THESE THUNDERSTORMS WILL BE LARGE HAIL AND DAMAGING WINDS. HOWEVER...ENOUGH FORCING AND MID LEVEL INSTABILITY MAY BE PRESENT FOR AN ISOLATED SUPERCELL WHICH MAY PRODUCE A TORNADO. CIVIL DEFENSE AGENCIES AND SPOTTER GROUPS ACROSS NORTHWEST ARKANSAS SHOULD BE PREPARED FOR ACTIVATION THIS AFTERNOON.
Local storm report, May 9, 2:39 PM CDT, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
239 PM CDT SAT MAY 09 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0130 PM ALTUS AR .75 INCH HAIL
05/09/98 FRANKLINSpecial weather statement, May 9, 2:45 PM CDT, 19 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 245 PM CDT SAT MAY 9 1998 ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THROUGH THE EARLY EVENING HOURS. AT MID AFTERNOON...LOW PRESSURE WAS LOCATED OVER SOUTHEAST OKLAHOMA WITH A COLD FRONT TO ITS SOUTH ACROSS EASTERN TEXAS AND A WARM FRONT TO ITS SOUTHEAST ACROSS SOUTHWEST ARKANSAS AND NORTHEAST LOUISIANA. MEANWHILE...LOW PRESSURE IN THE UPPER ATMOSPHERE WAS LOCATED OVER NORTH CENTRAL OKLAHOMA. BOTH THE SURFACE AND UPPER ATMOSPHERIC SYSTEMS ARE EXPECTED TO MOVE EAST THIS AFTERNOON AND EVENING AND SHOULD BE EAST OF THE AREA BY LATE EVENING. DUE TO THE VERY COLD AIR ALOFT ASSOCIATED WITH THE LOW PRESSURE IN THE UPPER ATMOSPHERE ENOUGH INSTABILITY WILL EXIST FOR ISOLATED SEVERE THUNDERSTORMS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSASv. THE MAIN THREAT WILL BE LARGE HAIL. HOWEVER...DAMAGING WINDS CANNOT BE RULED OUT AS WELL. CIVIL DEFENSE AND SPOTTER GROUPS ACROSS EASTERN OKLAHOMA SHOULD MONITOR THE LATEST WEATHER CONDTIONS AND BE PREPARED FOR POSSIBLE ACTIVATION.
Special weather statement, May 9, 2:45 PM CDT, 19 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 245 PM CDT SAT MAY 9 1998 ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THROUGH THE EARLY EVENING HOURS. AT MID AFTERNOON...LOW PRESSURE WAS LOCATED OVER SOUTHEAST OKLAHOMA WITH A COLD FRONT TO ITS SOUTH ACROSS EASTERN TEXAS AND A WARM FRONT TO ITS SOUTHEAST ACROSS SOUTHWEST ARKANSAS AND NORTHEAST LOUISIANA. MEANWHILE...LOW PRESSURE IN THE UPPER ATMOSPHERE WAS LOCATED OVER NORTH CENTRAL OKLAHOMA. BOTH THE SURFACE AND UPPER ATMOSPHERIC SYSTEMS ARE EXPECTED TO MOVE EAST THIS AFTERNOON AND EVENING AND SHOULD BE EAST OF THE AREA BY LATE EVENING. DUE TO THE VERY COLD AIR ALOFT ASSOCIATED WITH THE LOW PRESSURE IN THE UPPER ATMOSPHERE ENOUGH INSTABILITY WILL EXIST FOR ISOLATED SEVERE THUNDERSTORMS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. THE MAIN THREAT WILL BE LARGE HAIL. HOWEVER...DAMAGING WINDS CANNOT BE RULED OUT AS WELL. CIVIL DEFENSE AND SPOTTER GROUPS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD MONITOR THE LATEST WEATHER CONDTIONS AND BE PREPARED FOR POSSIBLE ACTIVATION.
Special weather statement, May 9, 2:45 PM CDT, 19 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 245 PM CDT SAT MAY 9 1998 ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THROUGH THE EARLY EVENING HOURS. AT MID AFTERNOON...LOW PRESSURE WAS LOCATED OVER SOUTHEAST OKLAHOMA WITH A COLD FRONT TO ITS SOUTH ACROSS EASTERN TEXAS AND A WARM FRONT TO ITS SOUTHEAST ACROSS SOUTHWEST ARKANSAS AND NORTHEAST LOUISIANA. MEANWHILE...LOW PRESSURE IN THE UPPER ATMOSPHERE WAS LOCATED OVER NORTH CENTRAL OKLAHOMA. BOTH THE SURFACE AND UPPER ATMOSPHERIC SYSTEMS ARE EXPECTED TO MOVE EAST THIS AFTERNOON AND EVENING AND SHOULD BE EAST OF THE AREA BY LATE EVENING. DUE TO THE VERY COLD AIR ALOFT ASSOCIATED WITH THE LOW PRESSURE IN THE UPPER ATMOSPHERE ENOUGH INSTABILITY WILL EXIST FOR ISOLATED SEVERE THUNDERSTORMS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSASv. THE MAIN THREAT WILL BE LARGE HAIL. HOWEVER...DAMAGING WINDS CANNOT BE RULED OUT AS WELL. CIVIL DEFENSE AND SPOTTER GROUPS ACROSS EASTERN OKLAHOMA SHOULD MONITOR THE LATEST WEATHER CONDTIONS AND BE PREPARED FOR POSSIBLE ACTIVATION.
Special weather statement, May 9, 2:45 PM CDT, 19 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-101200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 245 PM CDT SAT MAY 9 1998 ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THROUGH THE EARLY EVENING HOURS. AT MID AFTERNOON...LOW PRESSURE WAS LOCATED OVER SOUTHEAST OKLAHOMA WITH A COLD FRONT TO ITS SOUTH ACROSS EASTERN TEXAS AND A WARM FRONT TO ITS SOUTHEAST ACROSS SOUTHWEST ARKANSAS AND NORTHEAST LOUISIANA. MEANWHILE...LOW PRESSURE IN THE UPPER ATMOSPHERE WAS LOCATED OVER NORTH CENTRAL OKLAHOMA. BOTH THE SURFACE AND UPPER ATMOSPHERIC SYSTEMS ARE EXPECTED TO MOVE EAST THIS AFTERNOON AND EVENING AND SHOULD BE EAST OF THE AREA BY LATE EVENING. DUE TO THE VERY COLD AIR ALOFT ASSOCIATED WITH THE LOW PRESSURE IN THE UPPER ATMOSPHERE ENOUGH INSTABILITY WILL EXIST FOR ISOLATED SEVERE THUNDERSTORMS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. THE MAIN THREAT WILL BE LARGE HAIL. HOWEVER...DAMAGING WINDS CANNOT BE RULED OUT AS WELL. CIVIL DEFENSE AND SPOTTER GROUPS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD MONITOR THE LATEST WEATHER CONDTIONS AND BE PREPARED FOR POSSIBLE ACTIVATION.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 8:15 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee | 45 min |
| May 9, 9:00 AM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 45 min |
| May 9, 11:37 AM CDT | Severe Thunderstorm Warning | TSA | Delaware | 38 min |
| May 9, 11:54 AM CDT | Severe Thunderstorm Warning | TSA | Adair | 21 min |
| May 9, 12:07 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 23 min |
| May 9, 12:43 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 32 min |
| May 9, 1:45 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 30 min |
| May 9, 3:44 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer | 61 min |
| May 9, 3:46 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 29 min |
| May 9, 4:21 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 54 min |
| May 9, 5:11 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 34 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.