Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 162, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 20, 2001, 9:19 PM CDT for Latimer County, Oklahoma. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- May 20, 2001, 9:19 PM CDT (02:19 UTC)
- Expired
- May 20, 2001, 10:00 PM CDT
- In force
- 41 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Latimer County, OK
The radar
The Western Arkansas radar (KSRX), 93 km from the middle of the area, began a volume at 02:19 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 20, 9:00 PM CDT | Tornado Watch | SPC | 2 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 2.3 hours before the alert went out and 207 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
- 2068 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1431 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 13.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 210220 SVRTUL OKC077-210300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 919 PM CDT SUN MAY 20 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN LATIMER COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 1000 PM CDT * AT 919 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES EAST OF YANUSH...MOVING EAST AT 20 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BENGAL AND YANUSH. HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA. LAT...LON 3483 9527 3469 9536 3472 9505 3493 9499
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 20, 5:40 PM CDT, 3 hours 39 minutes earlier.
Area forecast discussion, May 20, 5:40 PM CDT, 3 hours 39 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 540 PM CDT SUN MAY 20 2001 UPDATED FORECAST TO INCLUDE HEADLINE FOR SEVERE TSTORM WATCH NUMBER 256. STILL WAITING ON POSSIBLE TOR WATCH FOR WESTERN AR...WILL HAVE TO UPDATE AGAIN WHEN AND IF IT COMES OUT. INCREASED SEVERE THREAT WORDING IN SEVERAL ZONES GROUPS. NEW STORMS GOING UP AND INCREASING NOW...ONE IN EAST TULSA COUNTY AND THE ONE IN CREEK COUNTY. OTHER STORMS GOING UP IN HUGHES AND PONTOTOC COUNTIES COULD ALSO BECOME QUITE SEVERE AS IT TAPS EXTREME INSTABILITY. FCSTID = 26 .TSA... AR...NONE. OK...NONE.
In the hours before
Local storm report, May 20, 6:14 PM CDT, 3 hours 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
614 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
053r5 PM 7 SW BURBANK OK 67 MPH TSTM GUST
05/20/01 OSAGE MESONET MEASUREMENTLocal storm report, May 20, 6:34 PM CDT, 2 hours 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
634 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0630 PM 1 S PAWHUSKA OK TORNADO
05/20/01 OSAGE AMATEUR RADIO REPORTLocal storm report, May 20, 7:28 PM CDT, 1 hour 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
728 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0639 PM 5 W PAWHUSKA OK 65 MPH TSTM GUST
05/20/01 OSAGE ESTIMATE BY AMATEUR RADIO
0654 PM 1 NW STIGLER OK TORNADO
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM WHITEFIELD OK .75 INCH HAIL
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM 3 WNW STIGLER OK 92 MPH TSTM GUST
05/20/01 HASKELL MESONET MEASUREMENT
0657 PM STIGLER OK TORNADO
05/20/01 HASKELL TV CHASE TEAM REPORTED
20 SECOND TOUCHDOWN
0721 PM VERA OK .88 INCH HAIL
05/20/01 WASHINGTON AMATEUR RADIO REPORT
@ RUKWBCe KDENNWUS54 KTSA 210032
LSRTUL
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
732 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0639 PM 5 W PAWHUSKA OK 65 MPH TSTM GUST
05/20/01 OSAGE ESTIMATE BY AMATEUR RADIO
0654 PM 1 NW STIGLER OK TORNADO
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM WHITEFIELD OK .75 INCH HAIL
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM 3 WNW STIGLER OK 92 MPH TSTM GUST
05/20/01 HASKELL MESONET MEASUREMENT
0657 PM STIGLER OK TORNADO
05/20/01 HASKELL TV CHASE TEAM REPORTED
20 SECOND TOUCHDOWN
0721 PM VERA OK .88 INCH HAIL
05/20/01 WASHINGTON AMATEUR RADIO REPORTLocal storm report, May 20, 7:32 PM CDT, 1 hour 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
732 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0639 PM 5 W PAWHUSKA OK 65 MPH TSTM GUST
05/20/01 OSAGE ESTIMATE BY AMATEUR RADIO
0654 PM 1 NW STIGLER OK TORNADO
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM WHITEFIELD OK .75 INCH HAIL
05/20/01 HASKELL EMERGENCY MGMT REPORT
0655 PM 3 WNW STIGLER OK 92 MPH TSTM GUST
05/20/01 HASKELL MESONET MEASUREMENT
0657 PM STIGLER OK TORNADO
05/20/01 HASKELL TV CHASE TEAM REPORTED
20 SECOND TOUCHDOWN
0721 PM VERA OK .88 INCH HAIL
05/20/01 WASHINGTON AMATEUR RADIO REPORTLocal storm report, May 20, 8:11 PM CDT, 1 hour 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
811 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0755 PM 2 W SPIRO OK TORNADO
05/20/01 LE FLORE EMERGENCY MGMT REPORT
0802 PM FT SMITH AR 4.5 INCH HAIL
05/20/01 SEBASTIAN EMERGENCY MGMT REPORT
080g5 PM ASHLAND OK 1.75 INCH HAIL
05/20/01 PITTSBURG PUBLIC REPORTLocal storm report, May 20, 9:17 PM CDT, 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
917 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0813 PM 4 S LOCUST GROVE OK .75 INCH HAIL
05/20/01 MAYES EMER MGMT REPORT
0817 PM FT CHAFFEE AR 1.75 INCH HAIL
05/20/01 SEBASTIAN EMER MGMT REPORT
0835 PM PEGGS OK .88 INCH HAIL
05/20/01 CHEROKEE EMER MGMT REPORT
0851 PM 4 NE CLIFTY AR TORNADO
05/20/01 MADISON REPORTED BY CARROLL
COUNTY LAW ENF
0851 PM 3 W BRANCH AR TORNADO
05/20/01 FRANKLIN EMER MGMT REPORT
0904 PM BRANCH AR 1 INCH HAIL
05/20/01 FRANKLIN 0 EMER MGMT REPORTThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 7:00 PM CDT | Tornado Warning | TSA | Pittsburg | 60 min |
| May 20, 7:06 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 54 min |
| May 20, 7:12 PM CDT | Tornado Warning | TSA | LeFlore, Sequoyah | 63 min |
| May 20, 7:16 PM CDT | Tornado Warning | TSA | Haskell | 44 min |
| May 20, 7:17 PM CDT | Severe Thunderstorm Warning | TSA | Ottawa | 28 min |
| May 20, 7:20 PM CDT | Tornado Warning | TSA | Latimer | 55 min |
| May 20, 7:23 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 67 min |
| May 20, 7:30 PM CDT | Severe Thunderstorm Warning | TSA | Tulsa, Washington | 45 min |
| May 20, 7:32 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 43 min |
| May 20, 7:39 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee, Okmulgee | 51 min |
| May 20, 7:43 PM CDT | Tornado Warning | TSA | Pittsburg | 62 min |
| May 20, 7:48 PM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 42 min |
| May 20, 8:08 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 67 min |
| May 20, 8:09 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 51 min |
| May 20, 8:19 PM CDT | Tornado Warning | TSA | Latimer, LeFlore | 56 min |
| May 20, 8:27 PM CDT | Severe Thunderstorm Warning | TSA | Mayes | 63 min |
| May 20, 8:34 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 26 min |
| May 20, 8:46 PM CDT | Severe Thunderstorm Warning | TSA | Haskell | 44 min |
| May 20, 9:00 PM CDT | Tornado Warning | TSA | LeFlore | 60 min |
| May 20, 9:50 PM CDT | Severe Thunderstorm Warning | TSA | Haskell | 40 min |
| May 20, 9:59 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 46 min |
| May 20, 10:04 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 56 min |
| May 20, 10:13 PM CDT | Severe Thunderstorm Warning | TSA | Latimer, Pushmataha | 62 min |
| May 20, 10:25 PM CDT | Severe Thunderstorm Warning | TSA | Latimer | 50 min |
| May 20, 10:39 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 51 min |
| May 20, 10:46 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 59 min |
| May 20, 10:52 PM CDT | Flash Flood Warning | TSA | Haskell, LeFlore, Sequoyah | 113 min |
| May 20, 11:06 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 54 min |
| May 20, 11:07 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 38 min |
| May 20, 11:31 PM CDT | Severe Thunderstorm Warning | TSA | Haskell | 44 min |
| May 20, 11:45 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 45 min |
| May 20, 11:50 PM CDT | Severe Thunderstorm Warning | TSA | Latimer | 55 min |
| May 20, 11:56 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 49 min |
| May 21, 12:03 AM CDT | Tornado Warning | TSA | LeFlore | 27 min |
| May 21, 12:45 AM CDT | Severe Thunderstorm Warning | TSA | Pittsburg, Pushmataha | 45 min |
| May 21, 1:28 AM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 62 min |
| May 21, 2:26 AM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 64 min |
| May 21, 2:29 AM CDT | Flash Flood Warning | TSA | Pushmataha | 3 hr |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.