Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 146, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 20, 2001, 6:59 PM CDT for Osage County, Oklahoma. It was in force for 46 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, 6:59 PM CDT (23:59 UTC)
- Expired
- May 20, 2001, 7:45 PM CDT
- In force
- 46 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Osage County, OK
The radar
The Tulsa radar (KINX), 68 km from the middle of the area, began a volume at 00:00 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, 5:00 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Lamont, OK (KLMN), launched 12:00Z, 12.0 hours before the alert went out and 120 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
- 186 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 769 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 210000 SVRTUL OKC113-210045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 659 PM CDT SUN MAY 20 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA * UNTIL 745 PM CDT * AT 659 PM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES EAST OF OKESA TO 6 MILES SOUTH OF HOMINY...MOVING EAST AT 25 MPH. VERY STRONG AND DAMAGING WINDS CAN BE EXPECTED WITH THIS LINE OF STORMS! * SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...SKIATOOK... OKESA...BARNSDALL...AVANT AND HOMINY. HAIL TO THE SIZEf OF GOLFBALLS AND WIND GUSTS TO 75 MPH CAN BE EXPECTED IN THE WARNED AREA. THIS IS A DANGEROUS STORM! MOVE TO A SAFE PLACE NOW. LAT...LON 3678 9609 3632 9648 3626 9601 3677 9600
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, 1 hour 19 minutes earlier.
Area forecast discussion, May 20, 5:40 PM CDT, 1 hour 19 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, 5:30 PM CDT, 1 hour 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
530 CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0450 PM 5 NW HANNA OK TORNADO
05/20/01 MCINTOSH DAMAGE REPORTED AT
INDIAN NATION TURNPIKE
TOLL BOOTH.
0522 PM 2 S STIDHAM OK TORNADO
05/20/01 MCINTOSH SAME
TORNADO...CONTINUING ENELocal storm report, May 20, 5:52 PM CDT, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
552 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0548 PM VIVIAN OK 1.75 INCH HAIL
05/20/01 MCINTOSH
0550 PM 2 N BROKEN ARROW OK 1 INCH HAIL
05/20/01 TULSALocal storm report, May 20, 6:08 PM CDT, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
608 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
K0548 PM VIVIAN OK 1.75 INCH HAIL
05/20/01 MCINTOSH
0550 PM 2 N BROKEN ARROW OK 1 INCH HAIL
05/20/01 TULSALocal storm report, May 20, 6:11 PM CDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
611 PM CDT SUN MAY 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0556 PM 2 N FAIRFAX OK 1 INCH HAIL
05/20/01 OSAGE REPORTED BY POLICE DEPT
0607 PM SAND SPGS OK 1.75 INCH HAIL
05/20/01 TULSA AMATEUR RADIO REPORT
mLocal storm report, May 20, 6:14 PM CDT, 45 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, 25 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 REPORTThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 4:17 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 58 min |
| May 20, 4:24 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee, Okmulgee | 51 min |
| May 20, 4:30 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 60 min |
| May 20, 4:31 PM CDT | Tornado Warning | TSA | McIntosh | 29 min |
| May 20, 4:56 PM CDT | Tornado Warning | TSA | McIntosh | 49 min |
| May 20, 5:14 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 61 min |
| May 20, 5:23 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 52 min |
| May 20, 5:32 PM CDT | Tornado Warning | TSA | Osage | 43 min |
| May 20, 5:45 PM CDT | Tornado Warning | TSA | McIntosh | 60 min |
| May 20, 5:46 PM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 44 min |
| May 20, 5:51 PM CDT | Severe Thunderstorm Warning | TSA | Rogers, Wagoner | 39 min |
| May 20, 6:02 PM CDT | Tornado Warning | TSA | Pittsburg | 58 min |
| May 20, 6:11 PM CDT | Tornado Warning | TSA | Haskell, Muskogee | 64 min |
| May 20, 6:12 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 48 min |
| May 20, 6:13 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 62 min |
| May 20, 6:16 PM CDT | Tornado Warning | TSA | Osage | 44 min |
| May 20, 6:33 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Mayes, Rogers | 57 min |
| May 20, 6:41 PM CDT | Tornado Warning | TSA | Washington | 49 min |
| May 20, 6:43 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 62 min |
| May 20, 6:56 PM CDT | Tornado Warning | TSA | Mayes | 49 min |
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.