Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 584, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Sep 17, 2001, 11:43 PM CDT for Ellis County, Woodward County, Oklahoma. It was in force for 52 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 17, 2001, 11:43 PM CDT (04:43 UTC)
- Expired
- Sep 18, 2001, 12:35 AM CDT
- In force
- 52 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties
Counties Ellis County, OK, Woodward County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 17, 11:44 PM CDT | Thunderstorm Wind 56 E | Mooreland, 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
Dodge City, (KDDC), launched 00:00Z, 4.7 hours before the alert went out and 165 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
- 732 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1890 m above ground
- 0-6 km bulk shear
- 106 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
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 17, 9:51 PM CDT, 1 hour 52 minutes earlier.
Area forecast discussion, Sep 17, 9:51 PM CDT, 1 hour 52 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 951 CDT MON SEP 17 2001 THE OVERNIGHT FORECAST IS ON TRACK NEEDING VERY LITTLE ADJUSTMENT. SHOWERS AND STORMS WILL MOVE INTO HARPER COUNTY FROM THE NORTHWEST BEFORE MIDNIGHT. THE BULK OF THE THUNDERSTORMS AND SHOWERS WILL NOT REACH CENTRAL SECTIONS UNTIL NEARLY DAYBREAK OR LATER...BUT A FEW STORMS MAY OCCASIONALLY FORM AHEAD OF THE MAIN AREA AS WE HAVE ALREADY SEEN THIS EVENING...SO TIMING WORDING WAS NOT INCLUDED IN THE FORECAST. .OUN... OK...NONE. TX...NONE.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 11:02 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 43 min |
| Sep 17, 11:14 PM CDT | Severe Thunderstorm Warning | OUN | Ellis | 31 min |
| Sep 17, 11:43 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Major, Woods | 52 min |
| Sep 18, 12:49 AM CDT | Tornado Warning | OUN | Major | 26 min |
| Sep 18, 1:05 AM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher | 40 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.