Alert archive / Kansas / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 33, NWS Wichita, KS

April 21, 1999Sedgwick County, Kansas

NWS Wichita, KS issued this severe thunderstorm warning at Apr 21, 1999, 10:14 PM CDT for Sedgwick County, Kansas. It was in force for 61 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: Apr 21, 1999, 10:14 PM CDT (03:14 UTC)
Expired: Apr 21, 1999, 11:15 PM CDT
In force: 61 min
Issued by: NWS Wichita, KS
Area: Whole counties

County Sedgwick County, KS

The radar

The Wichita radar (KICT), 4 km from the middle of the area, began a volume at 03:15 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.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 3.2 hours before the alert went out and 216 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

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, 4 hours 27 minutes earlier.

Area forecast discussion, Apr 21, 5:47 PM CDT, 4 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, 3 hours 53 minutes before

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Special weather statement, Apr 21, 6:21 PM CDT, 3 hours 53 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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, 9:14 PM CDT	Severe Thunderstorm Warning	ICT	Butler	61 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, 10:15 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, 1999 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.