Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 401, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 10, 1997, 10:39 PM CDT for Jackson County, Oklahoma. It was in force for 36 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
- Aug 10, 1997, 10:39 PM CDT (03:39 UTC)
- Expired
- Aug 10, 1997, 11:15 PM CDT
- In force
- 36 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Jackson County, OK
The radar
The Altus AFB radar (KFDR), 47 km from the middle of the area, began a volume at 03:42 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 10, 10:54 PM CDT | Thunderstorm Wind 53 | Altus, OK | measured by the Altus EOC |
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 00:00Z, 3.7 hours before the alert went out and 197 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
- 2314 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1225 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.8
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 Aug 10, 8:26 PM CDT, 2 hours 13 minutes earlier.
Area forecast discussion, Aug 10, 8:26 PM CDT, 2 hours 13 minutes before
FPUS3 KOKC 110126 COR AFDOKC AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 826 PM CDT SUN AUG 10 1997 UPDATED ZONES AT 745 PM TO INCLUDE FLASH FLOOD WATCH TONIGHT FOR WEST AND NORTH CENTRAL OKLAHOMA ZONES. BASIS WAS PREVIOUS HEAVY RAINFALL IN DEFINED FFA...PRESENT RADAR SITUATION WITH SOME TRAINING ECHOES AND CONTINUED OVERNIGHT CONVECTION. ADJUSTED TERMINOLOGY TO ACCOUNT FOR PERIODS OF THUNDERSTORMS OVERNIGHT IN FFA. INCREASED POPS IN SOUTHWEST SET OF ZONES. ADJUSTED WINDS TO REFLECT CURRENT SYNOPTIC SITUATION AND MESONET DATA. TEMPERATURES WERE UNCHANGED. FCSTID = 85 .OKC... OK...FFA TNGT ZNS 004>023..033>036. TX...NONE.
In the hours before
Local storm report, Aug 10, 10:30 PM CDT, 9 minutes before
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</html>Local storm report, Aug 10, 10:33 PM CDT, 6 minutes before
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<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
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Please try again in a few minutes.
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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 |
|---|---|---|---|---|
| Aug 10, 7:00 PM CDT | Flash Flood Warning | OUN | Beckham | 3 hr |
| Aug 10, 8:10 PM CDT | Flash Flood Warning | OUN | Kiowa, Washita | 3 hr |
| Aug 10, 10:00 PM CDT | Flash Flood Warning | OUN | Beckham, Custer, Greer, Kiowa, Washita | 4 hr |
| Aug 10, 11:18 PM CDT | Severe Thunderstorm Warning | OUN | Kiowa, Tillman | 42 min |
| Aug 10, 11:52 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 53 min |
| Aug 11, 1:50 AM CDT | Flash Flood Warning | OUN | Kiowa | 3 hr |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1997Every severe thunderstorm warning in 1997
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; radar from the NEXRAD Level II archive.