Alert archive / Indiana / Areal Flood Advisories in 2021

Areal Flood Advisory 6, NWS Indianapolis, IN

April 29, 20214 counties in Indiana

NWS Indianapolis, IN issued this areal flood advisory at Apr 29, 2021, 5:54 AM EDT for 4 counties in Indiana. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Apr 29, 2021, 5:54 AM EDT (09:54 UTC)
Expired: Apr 29, 2021, 8:00 AM EDT
In force: 2 hr
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon

Counties Jackson County, IN, Jennings County, IN, Lawrence County, IN, Martin County, IN

The radar

The Indianapolis radar (KIND), 94 km from the middle of the area, began a volume at 09:55 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 9.9 hours before the alert went out and 219 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: 123 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 856 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 Indianapolis, IN wrote its last area forecast discussion before this areal flood advisory went out at Apr 29, 3:26 AM EDT, 2 hours 28 minutes earlier.

Area forecast discussion, Apr 29, 3:26 AM EDT, 2 hours 28 minutes before

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Hazardous weather outlook, Apr 29, 3:50 AM EDT, 2 hours 4 minutes before

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<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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</body>
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The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 8:01 AM EDT	Areal Flood Advisory	IND	Jackson, Jennings, Lawrence, Martin	4 hr
Apr 29, 3:22 PM EDT	Areal Flood Warning	IND	Martin	8 hr

Nearby

Areal Flood Advisories in Indiana, 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.