Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 575, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Sep 15, 2001, 2:51 PM CDT for Custer County, Roger Mills County, Oklahoma. It was in force for 34 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 15, 2001, 2:51 PM CDT (19:51 UTC)
- Expired
- Sep 15, 2001, 3:25 PM CDT
- In force
- 34 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Custer County, OK, Roger Mills County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 15, 3:15 PM CDT | Hail 0.75 | Herring Station, 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
Norman, OK (KOUN), launched 12:00Z, 7.9 hours before the alert went out and 183 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
- 482 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 15, 10:50 AM CDT, 4 hours 1 minute earlier.
Area forecast discussion, Sep 15, 10:50 AM CDT, 4 hours 1 minute before
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 4:18 PM CDT | Severe Thunderstorm Warning | OUN | Kiowa, Washita | 42 min |
| Sep 15, 5:00 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Kiowa | 45 min |
| Sep 15, 5:16 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 29 min |
| Sep 15, 5:44 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Greer, Jackson, Kiowa | 46 min |
| Sep 15, 6:36 PM CDT | Severe Thunderstorm Warning | OUN | Jackson, Tillman | 39 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.