Alert archive / Oklahoma / Tornado Warnings in 1999
Tornado Warning 128, NWS Norman, OK
NWS Norman, OK issued this tornado warning at Jun 29, 1999, 11:30 PM CDT for Custer County, Washita County, Oklahoma. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1999, 11:30 PM CDT (04:30 UTC)
- Expired
- Jun 30, 1999, 12:00 AM CDT
- In force
- 30 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Custer County, OK, Washita County, OK
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 29, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 4.5 hours before the alert went out and 147 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
- 567 J/kg
- Mixed-layer CIN
- -317 J/kg
- Mixed-layer LCL
- 1460 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 254 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 tornado 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 tornado warning went out at Jun 29, 9:00 PM CDT, 2 hours 30 minutes earlier.
Area forecast discussion, Jun 29, 9:00 PM CDT, 2 hours 30 minutes 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 |
|---|---|---|---|---|
| Jun 29, 10:43 PM CDT | Severe Thunderstorm Warning | OUN | Custer | 47 min |
| Jun 29, 10:54 PM CDT | Tornado Warning | OUN | Custer | 36 min |
| Jun 29, 11:57 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Washita | 48 min |
| Jun 30, 1:24 AM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 51 min |
| Jun 30, 2:16 AM CDT | Flash Flood Warning | OUN | Harper | 3 hr |
| Jun 30, 2:21 AM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper | 39 min |
| Jun 30, 3:00 AM CDT | Severe Thunderstorm Warning | OUN | Ellis, Woodward | 45 min |
| Jun 30, 3:20 AM CDT | Flash Flood Warning | OUN | Noble | 3 hr |
| Jun 30, 4:05 AM CDT | Severe Thunderstorm Warning | OUN | Ellis | 40 min |
| Jun 30, 5:51 AM CDT | Severe Thunderstorm Warning | OUN | Ellis | 54 min |
| Jun 30, 5:55 AM CDT | Severe Thunderstorm Warning | OUN | Roger Mills | 65 min |
| Jun 30, 7:46 AM CDT | Severe Thunderstorm Warning | OUN | Beckham | 44 min |
Nearby
Tornado Warnings in Oklahoma, 1999Every tornado warning in 1999Tornadoes in 1999
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.