Alert archive / Kansas / Areal Flood Advisories in 2021

Areal Flood Advisory 41, NWS Topeka, KS

June 30, 2021Osage County, Shawnee County, Wabaunsee County, Kansas

NWS Topeka, KS issued this areal flood advisory at Jun 30, 2021, 6:30 AM CDT for Osage County, Shawnee County, Wabaunsee County, Kansas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jun 30, 2021, 6:30 AM CDT (11:30 UTC)
Expired: Jun 30, 2021, 9:30 AM CDT
In force: 3 hr
Issued by: NWS Topeka, KS
Area: Storm-based polygon

Counties Osage County, KS, Shawnee County, KS, Wabaunsee County, KS

The radar

The Topeka radar (KTWX), 32 km from the middle of the area, began a volume at 11:30 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

Springfield, MO (KSGF), launched 00:00Z, 11.5 hours before the alert went out and 287 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: 1477 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 993 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Topeka, KS wrote its last area forecast discussion before this areal flood advisory went out at Jun 30, 5:38 AM CDT, 52 minutes earlier.

Area forecast discussion, Jun 30, 5:38 AM CDT, 52 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Jun 30, 4:26 AM CDT, 2 hours 4 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Topeka, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 5:04 AM CDT	Areal Flood Advisory	TOP	Lyon, Morris	116 min
Jun 30, 7:38 AM CDT	Areal Flood Advisory	TOP	Douglas, Franklin, Osage	2 hr
Jun 30, 8:37 AM CDT	Flash Flood Warning	TOP	Douglas	2 hr
Jun 30, 11:39 AM CDT	Flash Flood Warning	TOP	Coffey, Lyon	2 hr
Jun 30, 12:36 PM CDT	Areal Flood Advisory	TOP	Anderson, Coffey, Franklin, Osage	4 hr
Jun 30, 2:19 PM CDT	Areal Flood Advisory	TOP	Douglas, Jefferson, Morris, Osage, Shawnee, Wabaunsee	3 hr
Jun 30, 3:31 PM CDT	River Flood Warning	TOP	Franklin, Osage	23 hr
Jun 30, 6:35 PM CDT	Areal Flood Warning	TOP	Anderson, Coffey	3 hr

Nearby

Areal Flood Advisories in Kansas, 2021 Every areal flood advisory in 2021

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.