Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 256, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 23, 2002, 7:43 PM CDT for Nowata County, Rogers County, Oklahoma. It was in force for 47 min. 4 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
- Aug 23, 2002, 7:43 PM CDT (00:43 UTC)
- Expired
- Aug 23, 2002, 8:30 PM CDT
- In force
- 47 min
- Issued by
- NWS Tulsa, OK
- Area
- Counties, with a storm outline in the text
Counties Nowata County, OK, Rogers County, OK
The radar
The Tulsa radar (KINX), 46 km from the middle of the area, began a volume at 00:45 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 |
|---|---|---|---|
| Aug 23, 7:50 PM CDT | Thunderstorm Wind 70 E | Nowata, OK | Thunderstorm winds measured at 74 miles an hour at a nearby mesonet site and estimated at 80 miles an hour at Nowata did widespread damage in and around Nowata. Several hundred trees and power poles were damaged or blown down. The trees fell on several hous |
| Aug 23, 7:57 PM CDT | Thunderstorm Wind 57 E | Foyil, OK | Law enforcement reported 65 mile an hour winds at Foyil. This wind caused damage to trees and power poles. The winds also blew down a metal shed at the football stadium. The falling shed injured a four year old girl who was at the location to watch a scrimm |
| Aug 23, 8:00 PM CDT | Thunderstorm Wind 70 E | Oologah, OK | Thunderstorm winds estimated at 80 miles an hour caused severe damage to trees, power poles and structures in and around Oologah. Some of the power poles blown down were on the northern periphery of American Electric Power Plant grounds. This caused a widesp |
| Aug 23, 8:10 PM CDT | Thunderstorm Wind 57 E | Claremore, 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 0.7 hours before the alert went out and 165 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
- 1863 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1567 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
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 Aug 23, 3:00 PM CDT, 4 hours 43 minutes earlier.
Area forecast discussion, Aug 23, 3:00 PM CDT, 4 hours 43 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OKLAHOMA 300 PM CDT FRI AUG 23 2002 HAVE SEEN SOME SCATTERED CONVECTION DEVELOP MAINLY OVER EASTERN SECTIONS OF THE AREA THIS AFTERNOON. THIS ACTIVITY IS GENERALLY DIURNALLY DRIVEN...SO SHOULD QUICKLY DIMINISH BY EARLY EVENING. FOCUS WILL THEN BE NORTHWEST OF THE AREA ONCE AGAIN AS A COMPLEX OF STORMS EXPECTED TO DEVELOP LATER TONIGHT. BELIEVE THIS ACTIVITY WILL DEVELOP FAR ENOUGH TO THE NORTHWEST...AND HAVE MORE OF AN EASTERLY MOVEMENT DURING THE NIGHT THUS REMAINING GENERALLY TO OUR NORTH AT LEAST THROUGH 12Z. HOWEVER...AM RELUCTANT TO REMOVE POPS FOR LATER TONIGHT AT THIS POINT...SO SLIGHT CHANCES WILL BE LEFT IN PLACE. BELIEVE BEST CHANCE FOR PRECIP OVER THE AREA WILL BE SATURDAY AND ESPECIALLY SATURDAY NIGHT AS FLOW ALOFT TURNS MORE NORTHWESTERLY. HIGHEST POPS WILL BE ACROSS NORTHEAST OKLAHOMA INTO NORTHWEST ARKANSAS BY LATER TOMORROW AFTERNOON INTO TOMORROW NIGHT...THEN TAPERING DOWNWARD OVER SOUTHEAST OKLAHOMA TOWARD THE RED RIVER. WILL KEEP CHANCE POPS OVER THE AREA SUNDAY...AND SLIGHT CHANCE SUNDAY NIGHT. FOR THE EXTENDED PART OF THE FORECAST WILL KEEP MONDAY AND TUESDAY DRY...THEN HAVE ADDED A MENTION OF SHOWERS AND THUNDERSTORMS FOR WEDNESDAY/THURSDAY. TUL 77 93 71 92 / 20 40 50 30 FSM 73 96 73 92 / 20 30 50 30 MLC 73 96 73 93 / 20 30 40 30 BVO 73 90 69 91 / 20 40 50 30 FYV 68 91 68 90 / 20 30 50 30 BYV 69 90 67 87 / 20 30 50 30 MIO 70 89 66 90 / 20 30 50 30 MKO 73 94 71 92 / 20 30 50 30 F10 73 94 72 93 / 20 30 40 30 HHW 74 98 75 94 / 20 20 30 30 FORECAST ID= 4 .TSA... AR...NONE. OK...NONE.
In the hours before
Local storm report, Aug 23, 5:58 PM CDT, 1 hour 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
558 PM CDT FRI AUG 23 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0510 PM 2 NE MIAMI OK 58 MPH TSTM WIND GUST
08/23/02 OTTAWA REPORT FROM MESONET
STATION.Special weather statement, Aug 23, 6:34 PM CDT, 1 hour 9 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-241200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 634 PM CDT FRI AUG 23 2002 ...ISOLATED SEVERE THUNDERSTORMS POSSIBLE THROUGH THIS EVENING... SCATTERED THUNDERSTORMS DEVELOPED THIS AFTERNOON IN THE VICINITY OF A FRONTAL BOUNDARY ACROSS SOUTHERN KANSAS. THE SCATTERED THUNDERSTORMS WILL CONTINUE TO MOVE SOUTHEAST INTO NORTHEASTERN OKLAHOMA THIS EVENING. SOME OF THE THUNDERSTORMS COULD BECOME SEVERE PRODUCING WIND GUSTS TO 60 MPH AND LARGE HAIL. THE THUNDERSTORM ACTIVITY IS EXPCECTED TO DIMINISH SHORTLY AFTER SUNSET. .SPOTTER ACTIVATION... SPOTTER ACTIVATION IS NOT EXPECTED THROUGH TONIGHT. RELATED GRAPHICAL INFORMATION CAN BE FOUND AT: WWW.SRH.NOAA.GOV/TULSA
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 7:02 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 58 min |
| Aug 23, 7:30 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 45 min |
| Aug 23, 8:10 PM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers | 50 min |
| Aug 23, 8:19 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 71 min |
| Aug 23, 8:49 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 41 min |
| Aug 23, 9:26 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 64 min |
| Aug 23, 10:25 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 65 min |
| Aug 23, 11:24 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 66 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.