Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 94, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 22, 2001, 8:29 PM CDT for Okmulgee 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
- Apr 22, 2001, 8:29 PM CDT (01:29 UTC)
- Expired
- Apr 22, 2001, 9:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Okmulgee County, OK
The radar
The Tulsa radar (KINX), 74 km from the middle of the area, began a volume at 01:30 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 |
|---|---|---|---|
| Apr 22, 7:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 1.5 hours before the alert went out and 132 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2594 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 258 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 230129 SVRTUL OKC111-230215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 829 PM CDT SUN APR 22 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... OKMULGEE COUNTY IN NORTHEAST OKLAHOMA * UNTIL 915 PM CDT * AT 829 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9 MILES SOUTHWEST OF OKMULGEE...MOVING NORTHEAST AT 45 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BALD HILL... PRESTON AND OKMULGEE. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. LAT...LON 3556 9621 3546 9604 3573 9575 3586 9596
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 Apr 22, 7:50 PM CDT, 39 minutes earlier.
Area forecast discussion, Apr 22, 7:50 PM CDT, 39 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 750 PM CDT SUN APR 22 2001 SENT AN UPDATED ZONE PACKAGE TO REFLECT NEW TORNADO WATCH FOR ERN OK AND PARTS OF NW AR. LINE OF STORMS EXTEND FROM NOWATA COUNTY SOUTHWEST INTO OKFUSKEE COUNTY. LINE HAS EXHIBITED SLOWER MOVEMENT...SO ADJUSTED TIMING OF STORMS WORDED FOR SLIGHTLY LATER. STILL EXPECT STORMS TO CLEAR ALL OF THE ERN PORTION OF CWA LATE TONIGHT. COOLER AND DRIER CONDITIONS EXPECTED FOR MONDAY. FCSTID = 23 .TSA... AR...TORNADO WATCH UNTIL 100 AM CDT MONDAY FOR ZONES ARZ001... ARZ010...ARZ019...ARZ029. OK...TORNADO WATCH UNTIL 100 AM CDT MONDAY FOR ZONES OKZ049... OKZ053>058...OKZ060>076.
In the hours before
Local storm report, Apr 22, 6:15 PM CDT, 2 hours 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
615 PM CDT SUN APR 22 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0550 PM OILTON OK 60 MPH TSTM GUST
04/22/01 CREEK OILTON EMERGENCY MANAGER
0550 PM 2 N OILTON OK .75 INCH HAIL
04/22/01 CREEK SPOTTER REPORTLocal storm report, Apr 22, 6:35 PM CDT, 1 hour 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
635 PM CDT SUN APR 22 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0614 PM WYNONA OK 60 MPH TSTM GUST
04/22/01 OSAGE SPOTTER REPORTThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:25 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 50 min |
| Apr 22, 7:41 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 49 min |
| Apr 22, 8:07 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 38 min |
| Apr 23, 12:52 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Delaware | 53 min |
| Apr 23, 2:45 AM CDT | Severe Thunderstorm Warning | TSA | Choctaw | 60 min |
| Apr 23, 3:23 AM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 67 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.