Alert archive / Kansas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 29, NWS Wichita, KS
NWS Wichita, KS issued this severe thunderstorm warning at Apr 21, 1999, 9:14 PM CDT for Butler County, Kansas. It was in force for 61 min. 9 reports 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
- Apr 21, 1999, 9:14 PM CDT (02:14 UTC)
- Expired
- Apr 21, 1999, 10:15 PM CDT
- In force
- 61 min
- Issued by
- NWS Wichita, KS
- Area
- Whole counties
County Butler County, KS
The radar
The Wichita radar (KICT), 55 km from the middle of the area, began a volume at 02:15 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 |
|---|---|---|---|
| Apr 21, 9:14 PM CDT | Hail 1.75 | Potwin, KS | |
| Apr 21, 9:17 PM CDT | Hail 2.75 | Potwin, KS | |
| Apr 21, 9:25 PM CDT | Hail 1.75 | Cassoday, KS | |
| Apr 21, 9:37 PM CDT | Hail 1 | El Dorado, KS | Report ed at El Dorado Lake. |
| Apr 21, 9:47 PM CDT | Hail 1.75 | El Dorado, KS | |
| Apr 21, 9:47 PM CDT | Hail 2.5 | Cassoday, KS | Tennis ball-sized hail damaged 5 vehicles and inflicted roof damage to several houses. |
| Apr 21, 9:52 PM CDT | Hail 1.75 | Potwin, KS | |
| Apr 21, 10:15 PM CDT | Thunderstorm Wind 52 | Potwin, KS | |
| Apr 21, 10:19 PM CDT | Hail 1.75 | Potwin, KS |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 21, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 2.2 hours before the alert went out and 171 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
- 1547 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1180 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 216 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 13.3
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 Wichita, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 21, 5:47 PM CDT, 3 hours 27 minutes earlier.
Area forecast discussion, Apr 21, 5:47 PM CDT, 3 hours 27 minutes before
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE WICHITA KS 445 PM CDT WED APR 21 1999 TNGT: WE BROKE THE CAP, WITH A LINE OF SCATTERED TS DVLPG FROM SW CORNER OF SUMNER CO NNE TO NE HARbVEY COUNTY 5 MILES NE OF KEWK. REPORT OF 1/2 INCH HAIL WAS REPORTED AT CALDWELL IN EXTREME SW SUMNER CO AT 430 PM. HAVE THEREFORE REVERSED FIELDS & EMPLOYED "POSSIBLY SEVERE" WORDING WITH EMPHASIS ON HAIL FOR SC & SE SXNS. ES
In the hours before
Special weather statement, Apr 21, 6:21 PM CDT, 2 hours 53 minutes before
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</html>Special weather statement, Apr 21, 6:21 PM CDT, 2 hours 53 minutes before
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<div class="status" id="status">Temporary Notice</div>
<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.
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<p id="message2">
Please try again in a few minutes.
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</html>The office that day
Everything else NWS Wichita, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 7:09 PM CDT | Severe Thunderstorm Warning | ICT | Chase | 66 min |
| Apr 21, 7:51 PM CDT | Severe Thunderstorm Warning | ICT | Sumner | 59 min |
| Apr 21, 8:14 PM CDT | Severe Thunderstorm Warning | ICT | Sedgwick | 46 min |
| Apr 21, 8:15 PM CDT | Severe Thunderstorm Warning | ICT | Chase | 60 min |
| Apr 21, 8:16 PM CDT | Severe Thunderstorm Warning | ICT | Butler | 59 min |
| Apr 21, 8:37 PM CDT | Severe Thunderstorm Warning | ICT | Cowley, Sumner | 38 min |
| Apr 21, 9:18 PM CDT | Severe Thunderstorm Warning | ICT | Chase | 42 min |
| Apr 21, 9:27 PM CDT | Severe Thunderstorm Warning | ICT | Sedgwick | 63 min |
| Apr 21, 9:55 PM CDT | Severe Thunderstorm Warning | ICT | Sumner | 60 min |
| Apr 21, 10:14 PM CDT | Severe Thunderstorm Warning | ICT | Sedgwick | 61 min |
| Apr 21, 10:15 PM CDT | Severe Thunderstorm Warning | ICT | Butler | 60 min |
| Apr 22, 4:00 AM CDT | Flash Flood Warning | ICT | Butler | 4 hr |
| Apr 22, 4:00 AM CDT | Severe Thunderstorm Warning | ICT | Sumner | 30 min |
| Apr 22, 4:26 AM CDT | Severe Thunderstorm Warning | ICT | Cowley | 64 min |
| Apr 22, 3:36 PM CDT | Severe Thunderstorm Warning | ICT | Labette, Montgomery | 39 min |
Nearby
Severe Thunderstorm Warnings in Kansas, 1999Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.