Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 207, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 9, 1998, 12:43 PM CDT for Sequoyah County, Oklahoma. It was in force for 32 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, 12:43 PM CDT (17:43 UTC)
- Expired
- May 9, 1998, 1:15 PM CDT
- In force
- 32 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 42 km from the middle of the area, began a volume at 17:45 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, 12:45 PM CDT | Hail 0.75 | Short, 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, 5.7 hours before the alert went out and 178 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.
486 WUUS54 KTSA 091744 RRA SVRTUL OKC135-091815- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1243 PM CDT SAT MAY 9 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN SEQUOYAH COUNTY - EAST CENTRAL OKLAHOMA * UNTIL 115 PM CDT * AT 1240 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM NEAR LIBERTY...OR 4 MILES WEST OF SHORT...MOVING NORTHEAST AT 30 MPH. * SOME LOCATIONS AFFECTED INCLUDE... SHORT 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, 1 hour 53 minutes earlier.
Area forecast discussion, May 9, 10:50 AM CDT, 1 hour 53 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
Local storm report, May 9, 9:40 AM CDT, 3 hours 3 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, 1 hour 57 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, 1 hour 57 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, 11:37 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, 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; radar from the NEXRAD Level II archive.