Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 170, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 17, 2002, 1:49 AM CDT for Cherokee County, Oklahoma. It was in force for 41 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 17, 2002, 1:49 AM CDT (06:49 UTC)
- Expired
- May 17, 2002, 2:30 AM CDT
- In force
- 41 min
- Issued by
- NWS Tulsa, OK
- Area
- Counties, with a storm outline in the text
County Cherokee County, OK
The radar
The Tulsa radar (KINX), 46 km from the middle of the area, began a volume at 06:49 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 17, 1:59 AM CDT | Hail 0.75 | Peggs, 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, 6.8 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
- 1170 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 560 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 9.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 170649 SVRTUL OKC021-170730- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 149 AM CDT FRI MAY 17 2002 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA * UNTIL 230 AM CDT * AT 149 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTHWEST OF PEGGS...MOVING EAST AT 20 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...TAHLEQUAH... HULBERT...ELDON...PEGGS AND SCRAPER. HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 3608 9532 3582 9525 3581 9481 3617 9480
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 16, 7:53 PM CDT, 5 hours 56 minutes earlier.
Area forecast discussion, May 16, 7:53 PM CDT, 5 hours 56 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 753 PM CDT THU MAY 16 2002 COMPLICATED SFC PATTERN THIS EVENING WITH MULTIPLE BOUNDARIES ACROSS AREA. COLD FRONT LOCATED NEAR MCI EXTENDING SW INTO OK PANHANDLE. FURTHER SOUTH INVERTED SFC TROUGH OVER NW OK AND SECONDARY WEAKER BOUNDARY ACROSS SE OK. ELEVATED CONVECTION HAS DEVELOP OVER SOUTH-CENTRAL OK/NORTH TEXAS IN RESPONSE TO WEAK UPPER WAVE THAT MOVED OUT OF MEXICO EARLIER TODAY. ELEVATED INSTABILITIES WILL REMAIN MARGINAL THIS EVENING...BUT STRONGER CELLS COULD BRIEFLY APPROACH SEVERE LIMITS AS ACTIVITY MOVES EAST ACROSS SE OK THIS EVENING. STRONGER CONVECTION WILL LIKELY DEVELOP AFTER MIDNIGHT AS MAIN UPPER DISTURBANCE MOVES OUT INTO THE CENTRAL PLAINS. SCT TSTMS COULD DEVELOP LATER THIS EVENING ALONG INVERTED SFC TROUGH OVER NORTH-CENTRAL/ NORTHEAST OK...BECOMING MORE WIDESPREAD AS COLD FRONT PUSHES SOUTH INTO FA LATE TONIGHT. THE HEAVIEST PRECIP EXPECTED AFTER 300 AM... CONTINUING THROUGH THE MORNING HOURS BEFORE PUSHING EAST OF FA BY MID AFTERNOON FRIDAY. FLASH FLOOD WATCH STILL LOOKS GOOD AS WIDESPREAD 2-3 INCH RAINFALL AMOUNTS WILL BE POSSIBLE OVER PORTIONS OF FA THROUGH FRIDAY AFTERNOON. WILL UPDATE TO TWEAK CURRENT FORECAST GIVEN LATEST TRENDS...OTHERWISE NO SIGNIFICANT CHANGES ANTICIPATED THIS EVENING. FCSTID = 12 .TSA... AR...FLASH FLOOD WATCH UNTIL NOON CDT FRIDAY FOR ZONES ARZ001>002...ARZ010>011...ARZ019>020...ARZ029. OK...FLASH FLOOD WATCH FROM UNTIL NOON CDT FRIDAY FOR ZONES OKZ054>076.
In the hours before
Local storm report, May 17, 12:12 AM CDT, 1 hour 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1212 AM CDT FRI MAY 17 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1208 AM 5 S PRUE OK 1.00 INCH HAIL
05/17/02 TULSA REPORTED BY TRAINED
SPOTTERLocal storm report, May 17, 12:18 AM CDT, 1 hour 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1218 AM CDT FRI MAY 17 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0905 PM 3 S ANTLERS OK .75 INCH HAIL
05/16/02 PUSHMATAHALocal storm report, May 17, 12:48 AM CDT, 1 hour 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1248 AM CDT FRI MAY 17 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1242 AM TULSA OK 1.00 INCH HAIL
05/17/02 TULSA 51ST AND YALE. REPORTED BY
TRAINED SPOTTER.Local storm report, May 17, 12:53 AM CDT, 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1253 AM CDT FRI MAY 17 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1215 AM 3 S SANDSPRINGS OK .88 INCH HAIL
05/17/02 TULSA REPORTED BY TRAINED
SPOTTERLocal storm report, May 17, 1:09 AM CDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
109 AM CDT FRI MAY 17 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0100 AM BROKEN ARROW OK .75 INCH HAIL
05/17/02 TULSA REPORTED BY TRAINED
SPOTTERLocal storm report, May 17, 1:33 AM CDT, 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
133 AM CDT FRI MAY 17 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0130 AM COWETA OK 60 MPH TSTM WIND GUST
05/17/02 WAGONER .88 INCH HAIL
REPORTED BY SPOTTER.The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 8:50 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 55 min |
| May 16, 9:50 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 55 min |
| May 16, 9:55 PM CDT | Flash Flood Warning | TSA | Osage, Pawnee | 2 hr |
| May 16, 11:03 PM CDT | Flash Flood Warning | TSA | Washington | 3 hr |
| May 16, 11:12 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 48 min |
| May 16, 11:20 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 40 min |
| May 16, 11:34 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 41 min |
| May 16, 11:43 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 62 min |
| May 17, 12:26 AM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 49 min |
| May 17, 12:44 AM CDT | Severe Thunderstorm Warning | TSA | Creek | 61 min |
| May 17, 1:04 AM CDT | Severe Thunderstorm Warning | TSA | Okmulgee | 56 min |
| May 17, 1:10 AM CDT | Severe Thunderstorm Warning | TSA | Rogers, Tulsa, Wagoner | 50 min |
| May 17, 1:18 AM CDT | Flash Flood Warning | TSA | Creek, Tulsa | 3 hr |
| May 17, 1:58 AM CDT | Severe Thunderstorm Warning | TSA | Tulsa, Wagoner | 47 min |
| May 17, 2:12 AM CDT | Severe Thunderstorm Warning | TSA | Creek | 63 min |
| May 17, 2:21 AM CDT | Flash Flood Warning | TSA | Wagoner | 3 hr |
| May 17, 2:34 AM CDT | Flash Flood Warning | TSA | Okmulgee | 2 hr |
| May 17, 2:38 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Wagoner | 67 min |
| May 17, 3:03 AM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 57 min |
| May 17, 3:12 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee | 63 min |
| May 17, 3:15 AM CDT | Flash Flood Warning | TSA | Cherokee, Creek, Delaware, Mayes, Muskogee, Okmulgee and 2 more | 3 hr |
| May 17, 3:37 AM CDT | Severe Thunderstorm Warning | TSA | Okmulgee | 53 min |
| May 17, 4:05 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 40 min |
| May 17, 4:39 AM CDT | Severe Thunderstorm Warning | TSA | Haskell, Muskogee, Pittsburg | 51 min |
| May 17, 5:01 AM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 44 min |
| May 17, 5:05 AM CDT | Severe Thunderstorm Warning | TSA | Latimer | 40 min |
| May 17, 5:17 AM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 43 min |
| May 17, 5:23 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 52 min |
| May 17, 5:41 AM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 49 min |
| May 17, 6:10 AM CDT | Flash Flood Warning | TSA | Cherokee, Creek, Delaware, Mayes, Muskogee, Okmulgee and 2 more | 6 hr |
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.