Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 126, NWS Little Rock, AR

August 13, 20115 counties in Arkansas

NWS Little Rock, AR issued this flash flood warning at Aug 13, 2011, 1:32 PM CDT for 5 counties in Arkansas. It was in force for 4 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: Aug 13, 2011, 1:32 PM CDT (18:32 UTC)
Expired: Aug 13, 2011, 5:12 PM CDT
In force: 4 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Flood severity: None

Counties Cleveland County, AR, Dallas County, AR, Grant County, AR, Jefferson County, AR, Lincoln County, AR

The radar

The Little Rock radar (KLZK), 85 km from the middle of the area, began a volume at 18:33 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

Jackson, MS (KJAN), launched 12:00Z, 6.5 hours before the alert went out and 277 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: 1901 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 713 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 Little Rock, AR wrote its last area forecast discussion before this flash flood warning went out at Aug 13, 10:40 AM CDT, 2 hours 52 minutes earlier.

Area forecast discussion, Aug 13, 10:40 AM CDT, 2 hours 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, Aug 13, 5:00 AM CDT, 8 hours 32 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 Little Rock, AR issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 7:05 PM CDT	Severe Thunderstorm Warning	LZK	Sharp	25 min
Aug 12, 7:16 PM CDT	Special Weather Statement	LZK	Scott	29 min
Aug 12, 7:19 PM CDT	Special Weather Statement	LZK	Logan, Yell	31 min
Aug 12, 7:41 PM CDT	Severe Thunderstorm Warning	LZK	Logan, Yell	36 min
Aug 12, 7:53 PM CDT	Special Weather Statement	LZK	Conway	32 min
Aug 12, 7:57 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Logan, Pope, Yell	33 min
Aug 12, 8:09 PM CDT	Severe Thunderstorm Warning	LZK	Garland, Montgomery, Perry, Saline, Scott, Yell	36 min
Aug 12, 8:12 PM CDT	Special Weather Statement	LZK	Sharp	43 min
Aug 12, 8:14 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Independence, Jackson	46 min
Aug 12, 8:27 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Faulkner, Perry, Pope, Van Buren, Yell	33 min
Aug 12, 8:48 PM CDT	Severe Thunderstorm Warning	LZK	Perry, Pulaski, Saline	42 min
Aug 12, 8:51 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Independence, Jackson, White, Woodruff	39 min
Aug 12, 8:58 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Faulkner, Perry, Pulaski	47 min
Aug 12, 9:01 PM CDT	Special Weather Statement	LZK	Garland, Hot Spring	44 min
Aug 12, 9:16 PM CDT	Severe Thunderstorm Warning	LZK	Garland, Grant, Hot Spring, Saline	44 min
Aug 12, 9:26 PM CDT	Severe Thunderstorm Warning	LZK	Jackson, White, Woodruff	49 min
Aug 12, 9:28 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Lonoke, Pulaski, Saline	47 min
Aug 12, 9:41 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Faulkner, Lonoke, Prairie, Pulaski, White	49 min
Aug 12, 9:56 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Dallas, Grant, Hot Spring, Jefferson, Saline	49 min
Aug 12, 10:19 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Jefferson, Lonoke, Prairie, Pulaski, Saline	41 min
Aug 12, 10:41 PM CDT	Special Weather Statement	LZK	Lonoke	59 min
Aug 12, 10:51 PM CDT	Special Weather Statement	LZK	Clark, Cleveland, Dallas, Grant, Ouachita	59 min
Aug 12, 11:03 PM CDT	Special Weather Statement	LZK	Jefferson, Lonoke	62 min
Aug 13, 12:56 AM CDT	Special Weather Statement	LZK	Bradley, Calhoun, Drew	59 min
Aug 13, 1:09 AM CDT	Severe Thunderstorm Warning	LZK	Clark	31 min
Aug 13, 2:29 AM CDT	Special Weather Statement	LZK	Dallas	46 min

Nearby

Flash Flood Warnings in Arkansas, 2011 Every flash flood warning in 2011

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.