Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 603, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Sep 20, 2001, 10:19 PM CDT for Blaine County, Oklahoma. It was in force for 41 min. 1 report 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
- Sep 20, 2001, 10:19 PM CDT (03:19 UTC)
- Expired
- Sep 20, 2001, 11:00 PM CDT
- In force
- 41 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Blaine County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 20, 10:35 PM CDT | Hail 0.88 | Watonga, 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.
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 3.3 hours before the alert went out and 119 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
- 644 J/kg
- Mixed-layer CIN
- -279 J/kg
- Mixed-layer LCL
- 1410 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 20, 9:40 PM CDT, 39 minutes earlier.
Area forecast discussion, Sep 20, 9:40 PM CDT, 39 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 940 PM CDT THU SEP 20 2001 ONE MORE ZONE UPDATE ISSUED TO CLEAN THINGS UP A BIT BASED ON LATEST RADAR TRENDS. REMOVED MENTION OF SEVERE BUT KEPT HEAVY RAIN PROSPECTS ALL AREAS. ADJUSTED A FEW LOW TEMPS OVERNIGHT BASED ON RECENT TRENDS AND REMOVED TEMPORAL WORDING FOR WINDS IN SOME OF THE GROUPS. STILL EXPECTING MORE RAINFALL OVERNIGHT WITH APPROACH OF SHORT WAVE. .OUN... OK...FLASH FLOOD WATCH AFTER MIDNIGHT FOR OKZ 030>032-039>043-045>048-050>052 TX...NONE. 33/DLF
In the hours before
Local storm report, Sep 20, 7:25 PM CDT, 2 hours 54 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
725 PM CDT THU SEP 20 2001
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0645 PM 2 W PLAINVIEW OK 3.00 INCH HAIL
09/20/01 WOODS SPOTTER REPORT
0710 PM 11 E BUFFALO OK 2.00 INCH HAIL
09/20/01 HARPER PUBLIC REPORT
JLocal storm report, Sep 20, 7:50 PM CDT, 2 hours 29 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
750 PM CDT THU SEP 20 2001
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0705 PM VERA TX WIND DAMAGE. POWER POLES
09/20/01 KNOX DOWN. AMATEUR RADIO
REPORT.
JLocal storm report, Sep 20, 8:00 PM CDT, 2 hours 19 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
800 PM CDT THU SEP 20 2001
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0748 PM 3 E BUFFALO OK .75 INCH HAIL
09/20/01 HARPER PUBLIC REPORT
0740 PM 10 E BUFFALO OK 1.25 INCH HAIL
09/20/01 HARPER SPOTTER REPORT
JLocal storm report, Sep 20, 8:07 PM CDT, 2 hours 12 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
807 PM CDT THU SEP 20 2001
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0625 PM 4 NNW PLAINVIEW OK .75 INCH HAIL
09/20/01 WOODS PUBLIC REPORT
JLocal storm report, Sep 20, 8:45 PM CDT, 1 hour 34 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
845 PM CDT THU SEP 20 2001
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0815 PM 5 N WOODWARD OK 1.00 INCH HAIL
09/20/01 WOODWARD SPOTTER REPORT
JLocal storm report, Sep 20, 9:09 PM CDT, 1 hour 10 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
909 PM CDT THU SEP 20 2001
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0900 PM 9 SSW WOODWARD OK .75 INCH HAIL
09/20/01 WOODWARD PUBLIC REPORT
JThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 7:30 PM CDT | Severe Thunderstorm Warning | OUN | Harper | 45 min |
| Sep 20, 8:04 PM CDT | Severe Thunderstorm Warning | OUN | Woodward | 41 min |
| Sep 20, 8:13 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper | 32 min |
| Sep 20, 8:45 PM CDT | Severe Thunderstorm Warning | OUN | Woodward | 45 min |
| Sep 20, 10:39 PM CDT | Severe Thunderstorm Warning | OUN | Kingfisher | 51 min |
| Sep 20, 10:48 PM CDT | Severe Thunderstorm Warning | OUN | Garfield | 27 min |
| Sep 20, 10:54 PM CDT | Severe Thunderstorm Warning | OUN | Blaine | 51 min |
| Sep 20, 11:38 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Kingfisher | 52 min |
| Sep 21, 1:05 AM CDT | Severe Thunderstorm Warning | OUN | Kay | 25 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.