Alert archive / Kentucky / Areal Flood Warnings in 2021

Areal Flood Warning 16, NWS Louisville, KY

May 4, 2021Logan County, Simpson County, Warren County, Kentucky

NWS Louisville, KY issued this areal flood warning at May 4, 2021, 8:46 AM CDT for Logan County, Simpson County, Warren County, Kentucky. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 4, 2021, 8:46 AM CDT (13:46 UTC)
Expired: May 4, 2021, 12:00 PM CDT
In force: 3 hr
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Flood severity: None

Counties Logan County, KY, Simpson County, KY, Warren County, KY

The radar

The Ft Campbell radar (KHPX), 60 km from the middle of the area, began a volume at 13:46 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

Little Rock, AR (KLZK), launched 12:00Z, 1.8 hours before the alert went out and 375 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: 10 J/kg
Mixed-layer CIN: -373 J/kg
Mixed-layer LCL: 1101 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 100 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 warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Louisville, KY wrote its last area forecast discussion before this areal flood warning went out at May 4, 8:01 AM CDT, 45 minutes earlier.

Area forecast discussion, May 4, 8:01 AM CDT, 45 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, May 4, 8:12 AM CDT, 34 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>

In the hours before

Local storm report, May 4, 7:56 AM CDT, 50 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>

Local storm report, May 4, 8:22 AM CDT, 24 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>

Local storm report, May 4, 8:23 AM CDT, 23 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>

Local storm report, May 4, 8:30 AM CDT, 16 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>

Local storm report, May 4, 8:36 AM CDT, 10 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>

Local storm report, May 4, 8:43 AM CDT, 3 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 Louisville, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 4, 12:08 AM CDT	Special Weather Statement	LMK	Warren	22 min
May 4, 12:12 AM CDT	Severe Thunderstorm Warning	LMK	Edmonson, Warren	33 min
May 4, 12:26 AM CDT	Severe Thunderstorm Warning	LMK	Allen, Monroe	34 min
May 4, 12:45 AM CDT	Special Weather Statement	LMK	Edmonson	15 min
May 4, 1:32 AM CDT	Special Weather Statement	LMK	Barren, Warren	43 min
May 4, 1:57 AM CDT	Special Weather Statement	LMK	Metcalfe	33 min
May 4, 2:15 AM CDT	Special Weather Statement	LMK	Monroe	30 min
May 4, 2:18 AM CDT	Special Weather Statement	LMK	Warren	27 min
May 4, 2:43 AM CDT	Special Weather Statement	LMK	Barren	32 min
May 4, 2:54 AM CDT	Special Weather Statement	LMK	Butler	36 min
May 4, 3:13 AM CDT	Severe Thunderstorm Warning	LMK	Barren, Edmonson, Hart	32 min
May 4, 3:22 AM CDT	Severe Thunderstorm Warning	LMK	Clinton, Cumberland	23 min
May 4, 3:27 AM CDT	Flash Flood Warning	LMK	Barren	3 hr
May 4, 3:42 AM CDT	Severe Thunderstorm Warning	LMK	Cumberland, Monroe	33 min
May 4, 3:47 AM CDT	Special Weather Statement	LMK	Adair, Butler, Clinton, Cumberland, Edmonson, Green and 2 more	28 min
May 4, 3:55 AM CDT	Flash Flood Watch	LMK	Adair, Allen, Barren, Butler, Casey, Clinton and 13 more	22 hr
May 4, 4:06 AM CDT	Flash Flood Warning	LMK	Cumberland, Monroe	3 hr
May 4, 4:11 AM CDT	Special Weather Statement	LMK	Butler	34 min
May 4, 4:21 AM CDT	Flash Flood Warning	LMK	Butler	5 hr
May 4, 4:24 AM CDT	Special Weather Statement	LMK	Edmonson, Warren	36 min
May 4, 4:51 AM CDT	Flash Flood Warning	LMK	Edmonson, Hart	3 hr
May 4, 5:03 AM CDT	Special Weather Statement	LMK	Green	27 min
May 4, 5:20 AM CDT	Special Weather Statement	LMK	Allen, Barren, Logan, Simpson, Warren	40 min
May 4, 5:21 AM CDT	Flash Flood Warning	LMK	Adair, Cumberland, Metcalfe	3 hr
May 4, 5:49 AM CDT	Flash Flood Warning	LMK	Barren, Edmonson, Metcalfe, Warren	3 hr
May 4, 5:54 AM CDT	Flash Flood Warning	LMK	Logan, Simpson, Warren	3 hr
May 4, 5:58 AM CDT	Special Weather Statement	LMK	Allen, Simpson	47 min
May 4, 6:10 AM CDT	Severe Thunderstorm Warning	LMK	Allen, Simpson	20 min
May 4, 6:26 AM CDT	Special Weather Statement	LMK	Barren, Monroe	19 min
May 4, 6:28 AM CDT	Areal Flood Advisory	LMK	Allen, Barren, Metcalfe, Monroe	3 hr
May 4, 6:43 AM CDT	Special Weather Statement	LMK	Allen, Cumberland, Monroe	47 min
May 4, 6:51 AM CDT	Flash Flood Warning	LMK	Adair, Barren, Clinton, Cumberland, Metcalfe, Monroe and 1 more	6 hr
May 4, 8:50 AM CDT	Areal Flood Warning	LMK	Barren, Edmonson, Metcalfe, Warren	4 hr
May 4, 10:12 AM CDT	River Flood Warning	LMK	Cumberland, Monroe	11 hr
May 4, 1:19 PM CDT	River Flood Warning	LMK	Butler, Warren	4 days
May 4, 1:19 PM CDT	River Flood Warning	LMK	Butler, Muhlenberg, Ohio	5 days
May 4, 5:40 PM CDT	Special Weather Statement	LMK	Warren	50 min
May 4, 5:48 PM CDT	Special Weather Statement	LMK	Spencer	27 min
May 4, 6:13 PM CDT	Special Weather Statement	LMK	Simpson	47 min
May 4, 6:26 PM CDT	Special Weather Statement	LMK	Edmonson	49 min
May 4, 6:41 PM CDT	Special Weather Statement	LMK	Butler	34 min
May 4, 6:56 PM CDT	Special Weather Statement	LMK	Butler	34 min
May 4, 5:54 AM CDT	Special Weather Statement	LMK	Orange	36 min

Nearby

Areal Flood Warnings in Kentucky, 2021 Every areal flood warning 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.