Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 203, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 9, 1998, 11:37 AM CDT for Delaware County, Oklahoma. It was in force for 38 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
- May 9, 1998, 11:37 AM CDT (16:37 UTC)
- Expired
- May 9, 1998, 12:15 PM CDT
- In force
- 38 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Delaware County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 9, 11:40 AM CDT | Hail 0.75 | Kansas, 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 nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 4.6 hours before the alert went out and 105 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
- 1409 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 25 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 091637 RRA SVRTUL OKC041-091715- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1137 AM CDT SAT MAY 9 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN DELAWARE COUNTY - NORTHEASTERN OKLAHOMA * UNTIL 1215 PM CDT * AT 1135 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM NEAR KANSAS...MOVING NORTHEAST AT 25 MPH. * SOME LOCATIONS AFFECTED INCLUDE... COLCORD 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 CDOVER INSIDE A STURDY BUILDING. STAY AWAY FROM WINDOWS. TO PROTECT YOURSELF FROM LIGHTNING STAY OFF THE PHONE AND DON'T 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, 47 minutes earlier.
Area forecast discussion, May 9, 10:50 AM CDT, 47 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, 6:00 AM CDT, 5 hours 37 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 600 AM CDT SAT MAY 9 1998 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE THROUGH MID AFTERNOON ACROSS PARTS OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. THE MAIN THREAT WILL BE IN AREAS SOUTH OF A LINE FROM TULSA TO FAYETTEVILLE. SEVERE THUNDERSTORM WATCH NUMBER 317 IS IN EFFECT FOR PARTS OF EASTERN OKLAHOMA UNTIL 11 AM. AN UPPER LEVEL WEATHER SYSTEM ACROSS EXTREME WESTERN OKLAHOMA EARLY THIS MORNING WILL MOVE INTO EASTERN OKLAHOMA BY MIDDAY AND INTO WESTERN ARKANSAS THIS AFTERNOON. A SURFACE LOW PRESSURE SYSTEM WAS CENTERED NEAR WICHITA FALLS TEXAS EARLY THIS MORNING AND IS EXPECTED TO MOVE ACROSS THE SOUTHEAST CORNER OF OKLAHOMA LATE THIS MORNING BEFORE MOVING INTO SOUTHERN ARKANSAS THIS AFTERNOON. NUMEROUS THUNDERSTORMS WERE DEVELOPING ACROSS CENTRAL AND WESTERN OKLAHOMA EARLY THIS MORNING AHEAD OF THE UPPER LEVEL SYSTEM. ALTHOUGH THE AIRMASS ACROSS MOST OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS MORNING WAS ONLY MARGINALLY UNSTABLE...INSTABILITY WILL INCREASE AS THE UPPER LEVEL SYSTEM APPROACHES. SCATTERED THUNDERSTORMS WILL SPREAD INTO EASTERN OKLAHOMA THIS MORNING AND INTO NORTHWEST ARKANSAS BY THIS AFTERNOON. COLD AIR ALOFT NEAR THE UPPER SYSTEM MAY PRODUCE ENOUGH INSTABILITY FOR A FEW SEVERE THUNDERSTORMS SOUTH OF A TULSA TO FAYETTEVILLE LINE. THUNDERSTORMS NORTH OF THIS AREA MAY BE CAPABLE OF PRODUCING SMALL HAIL...BUT THE LACK OF SUFFICIENT INSTABILITY WILL LIMIT THE SEVERE POTENTIAL. THE SEVERE WEATHER THREATS TODAY WILL BE LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS. AS THE SURFACE AND UPPER LEVEL SYSTEMS MOVE INTO ARKANSAS LATER THIS AFTERNOON...THE SEVERE WEATHER THREAT WILL DIMINISH. A FEW THUNDERSTORMS ARE POSSIBLE OVERNIGHT...BUT SEVERE WEATHER IS NOT EXPECTED AFTER 600 PM. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN THE SEVERE THUNDERSTORM WATCH AREA SHOULD CONSIDER ACTIVATION BY 800 AM. GROUPS ACROSS THE REST OF THE AREA SHOULD MONITOR THE LATEST FORECASTS AND BE PREPARED FOR ACTIVATION THIS MORNING OR EARLY THIS AFTERNOON.
Special weather statement, May 9, 6:00 AM CDT, 5 hours 37 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 600 AM CDT SAT MAY 9 1998 A FEW SEVERE THUNDERSTORMS ARE POSSIBLE THROUGH MID AFTERNOON ACROSS PARTS OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. THE MAIN THREAT WILL BE IN AREAS SOUTH OF A LINE FROM TULSA TO FAYETTEVILLE. SEVERE THUNDERSTORM WATCH NUMBER 317 IS IN EFFECT FOR PARTS OF EASTERN OKLAHOMA UNTIL 11 AM. AN UPPER LEVEL WEATHER SYSTEM ACROSS EXTREME WESTERN OKLAHOMA EARLY THIS MORNING WILL MOVE INTO EASTERN OKLAHOMA BY MIDDAY AND INTO WESTERN ARKANSAS THIS AFTERNOON. A SURFACE LOW PRESSURE SYSTEM WAS CENTERED NEAR WICHITA FALLS TEXAS EARLY THIS MORNING AND IS EXPECTED TO MOVE ACROSS THE SOUTHEAST CORNER OF OKLAHOMA LATE THIS MORNING BEFORE MOVING INTO SOUTHERN ARKANSAS THIS AFTERNOON. NUMEROUS THUNDERSTORMS WERE DEVELOPING ACROSS CENTRAL AND WESTERN OKLAHOMA EARLY THIS MORNING AHEAD OF THE UPPER LEVEL SYSTEM. ALTHOUGH THE AIRMASS ACROSS MOST OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS MORNING WAS ONLY MARGINALLY UNSTABLE...INSTABILITY WILL INCREASE AS THE UPPER LEVEL SYSTEM APPROACHES. SCATTERED THUNDERSTORMS WILL SPREAD INTO EASTERN OKLAHOMA THIS MORNING AND INTO NORTHWEST ARKANSAS BY THIS AFTERNOON. COLD AIR ALOFT NEAR THE UPPER SYSTEM MAY PRODUCE ENOUGH INSTABILITY FOR A FEW SEVERE THUNDERSTORMS SOUTH OF A TULSA TO FAYETTEVILLE LINE. THUNDERSTORMS NORTH OF THIS AREA MAY BE CAPABLE OF PRODUCING SMALL HAIL...BUT THE LACK OF SUFFICIENT INSTABILITY WILL LIMIT THE SEVERE POTENTIAL. THE SEVERE WEATHER THREATS TODAY WILL BE LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS. AS THE SURFACE AND UPPER LEVEL SYSTEMS MOVE INTO ARKANSAS LATER THIS AFTERNOON...THE SEVERE WEATHER THREAT WILL DIMINISH. A FEW THUNDERSTORMS ARE POSSIBLE OVERNIGHT...BUT SEVERE WEATHER IS NOT EXPECTED AFTER 600 PM. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS IN THE SEVERE THUNDERSTORM WATCH AREA SHOULD CONSIDER ACTIVATION BY 800 AM. GROUPS ACROSS THE REST OF THE AREA SHOULD MONITOR THE LATEST FORECASTS AND BE PREPARED FOR ACTIVATION THIS MORNING OR EARLY THIS AFTERNOON.
Local storm report, May 9, 9:40 AM CDT, 1 hour 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
940 AM CDT SAT MAY 9 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0905 AM OAK GROVE AR 1 INCH HAIL
05/09/98 CARROLL QUARTER SIZE HAIL
COVERING THE GROUND
0915 AM 15 S HUNSTVILLE AR .75 INCH HAIL
05/09/98 MADISONLocal storm report, May 9, 10:46 AM CDT, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1046 AM CDT SAT MAY 09 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0856 AMv BERRYVILLE AR 1.75 INCH HAIL
05/09/98 CARROLL
0945 AM METALTON AR .75 INCH HAIL
05/09/98 CARROLLLocal storm report, May 9, 10:46 AM CDT, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1046 AM CDT SAT MAY 09 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0856 AMv BERRYVILLE AR 1.75 INCH HAIL
05/09/98 CARROLL
0945 AM METALTON AR .75 INCH HAIL
05/09/98 CARROLLThe 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, 11:54 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, 3:04 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Pittsburg | 41 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.