Alert archive / Arkansas / Flash Flood Warnings in 2009

Flash Flood Warning 220, NWS Memphis, TN

October 9, 2009Lake County, Tennessee; Craighead County, Mississippi County, Arkansas

NWS Memphis, TN issued this flash flood warning at Oct 9, 2009, 3:38 AM CDT for Lake County, Tennessee; Craighead County, Mississippi County, Arkansas. It was in force for 6 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: Oct 9, 2009, 3:38 AM CDT (08:38 UTC)
Expired: Oct 9, 2009, 9:45 AM CDT
In force: 6 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Craighead County, AR, Mississippi County, AR, Lake County, TN

The radar

The Memphis radar (KNQA), 72 km from the middle of the area, began a volume at 08:41 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

Nashville Metro, TN (KBNA), launched 00:00Z, 8.6 hours before the alert went out and 311 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: 1054 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 757 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 292 m²/s²
0-3 km storm-relative helicity: 351 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 7.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Memphis, TN wrote its last area forecast discussion before this flash flood warning went out at Oct 9, 12:32 AM CDT, 3 hours 6 minutes earlier.

Area forecast discussion, Oct 9, 12:32 AM CDT, 3 hours 6 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, Oct 8, 8:30 PM CDT, 7 hours 8 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 Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 9, 6:04 AM CDT	Flash Flood Warning	MEG	DeSoto, Tunica	6 hr
Oct 9, 10:48 AM CDT	Severe Thunderstorm Warning	MEG	Coahoma, DeSoto, Marshall, Panola, Quitman, Tate and 1 more	42 min
Oct 9, 11:27 AM CDT	Severe Thunderstorm Warning	MEG	Coahoma, Lafayette, Marshall, Panola, Quitman, Tallahatchie and 2 more	63 min
Oct 9, 1:47 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw, Yalobusha	43 min
Oct 9, 2:20 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw, Monroe	40 min
Oct 9, 2:28 PM CDT	Tornado Warning	MEG	Chickasaw, Monroe	32 min
Oct 9, 2:46 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Itawamba, Lee, Monroe	44 min
Oct 9, 2:48 PM CDT	Tornado Warning	MEG	Monroe	42 min
Oct 9, 9:35 AM CDT	Flash Flood Warning	MEG	Lauderdale, Tipton	6 hr
Oct 9, 9:49 AM CDT	Flash Flood Warning	MEG	Dyer, Lake, Obion	6 hr
Oct 8, 11:22 PM CDT	Severe Thunderstorm Warning	MEG	Randolph	45 min
Oct 9, 12:22 AM CDT	Flash Flood Warning	MEG	Clay, Greene, Lawrence, Randolph	14 hr

Nearby

Flash Flood Warnings in Arkansas, 2009 Flash Flood Warnings in Tennessee, 2009 Every flash flood warning in 2009

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.