Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 84, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 1, 2002, 11:37 PM CDT for Creek County, Oklahoma. It was in force for 23 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 1, 2002, 11:37 PM CDT (04:37 UTC)
- Expired
- May 2, 2002, 12:00 AM CDT
- In force
- 23 min
- Issued by
- NWS Tulsa, OK
- Area
- Counties, with a storm outline in the text
County Creek County, OK
The radar
The Tulsa radar (KINX), 63 km from the middle of the area, began a volume at 04:41 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 1, 11:50 PM CDT | Hail 0.75 | Sapulpa, 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
Norman, OK (KOUN), launched 00:00Z, 4.6 hours before the alert went out and 134 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
- 43 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 3005 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 020437 SVRTUL OKC037-020500- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1137 PM CDT WED MAY 1 2002 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN CREEK COUNTY IN NORTHEAST OKLAHOMA * UNTIL MIDNIGHT CDT * AT 1137 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTH OF KELLYVILLE...MOVING NORTHEAST AT 30 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...MOUNDS... KIEFER...KELLYVILLE AND SAPULPA. HAIL TO THE SIZE OF NICKELS CAN BE EXPECTED IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 3592 9633 3583 9623 3587 9604 3610 9607
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 8:29 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 46 min |
| May 1, 9:17 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 28 min |
| May 1, 9:28 PM CDT | Tornado Warning | TSA | Adair, Cherokee | 32 min |
| May 1, 11:26 PM CDT | Severe Thunderstorm Warning | TSA | Okmulgee, Tulsa | 49 min |
| May 1, 11:49 PM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 41 min |
| May 2, 12:22 AM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 38 min |
| May 2, 12:51 AM CDT | Severe Thunderstorm Warning | TSA | Mayes | 24 min |
| May 2, 1:01 AM CDT | Severe Thunderstorm Warning | TSA | Adair | 44 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2002Every severe thunderstorm warning in 2002
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.