Alert archive / Alabama / Flash Flood Watches in 2014

Flash Flood Watch 3, NWS Huntsville, AL

April 29, 201411 counties in Alabama; Franklin County, Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this flash flood watch at Apr 29, 2014, 9:08 AM CDT for 11 counties in Alabama; Franklin County, Lincoln County, Moore County, Tennessee. It took effect at Apr 29, 2014, 2:00 PM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Apr 29, 2014, 9:08 AM CDT (14:08 UTC)
In effect from: Apr 29, 2014, 2:00 PM CDT
Expired: Apr 30, 2014, 12:00 AM CDT
In force: 10 hr
Issued by: NWS Huntsville, AL
Flood severity: None

Counties Colbert County, AL, Cullman County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 69 km from the middle of the area, began a volume at 14:12 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 12:00Z, 2.1 hours before the alert went out and 159 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1906 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 76 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 flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Huntsville, AL wrote its last area forecast discussion before this flash flood watch went out at Apr 29, 6:15 AM CDT, 2 hours 53 minutes earlier.

Area forecast discussion, Apr 29, 6:15 AM CDT, 2 hours 53 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, Apr 29, 3:40 AM CDT, 5 hours 28 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 Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 28, 7:05 PM CDT	Tornado Warning	HUN	Lawrence, Limestone, Morgan	25 min
Apr 28, 8:00 PM CDT	Severe Thunderstorm Warning	HUN	Madison	30 min
Apr 28, 8:15 PM CDT	Flash Flood Warning	HUN	Jackson, Limestone, Madison, Morgan	3 hr
Apr 28, 8:29 PM CDT	Tornado Warning	HUN	Cullman, Lawrence, Morgan	31 min
Apr 28, 8:35 PM CDT	Tornado Warning	HUN	Cullman	25 min
Apr 28, 8:59 PM CDT	Tornado Warning	HUN	Cullman	31 min
Apr 28, 9:11 PM CDT	High Wind Warning	HUN	Cullman, Lawrence, Limestone, Madison, Morgan	2 hr
Apr 28, 9:24 PM CDT	Tornado Warning	HUN	Cullman	36 min
Apr 28, 9:30 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	15 min
Apr 28, 9:36 PM CDT	Tornado Warning	HUN	Cullman	24 min
Apr 28, 9:45 PM CDT	Areal Flood Warning	HUN	Colbert, Franklin, Lauderdale, Lawrence, Limestone, Morgan	3 hr
Apr 28, 9:53 PM CDT	Tornado Warning	HUN	Cullman, Marshall, Morgan	37 min
Apr 28, 10:10 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	35 min
Apr 28, 10:21 PM CDT	Tornado Warning	HUN	Madison, Marshall	39 min
Apr 28, 11:13 PM CDT	Areal Flood Warning	HUN	Jackson, Limestone, Madison, Morgan	4 hr
Apr 28, 11:42 PM CDT	River Flood Warning	HUN	Lawrence	56 hr
Apr 28, 11:44 PM CDT	Tornado Warning	HUN	DeKalb, Marshall	46 min
Apr 29, 12:31 AM CDT	Tornado Warning Emergency	HUN	DeKalb	29 min
Apr 29, 1:00 AM CDT	Tornado Warning	HUN	DeKalb	45 min
Apr 29, 2:10 AM CDT	Flash Flood Warning	HUN	DeKalb	7 hr
Apr 29, 2:17 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb	28 min
Apr 29, 9:10 AM CDT	Areal Flood Warning	HUN	DeKalb	6 hr
Apr 29, 3:00 PM CDT	Areal Flood Warning	HUN	DeKalb	3 hr
Apr 29, 5:57 PM CDT	Special Weather Statement	HUN	Morgan	33 min
Apr 29, 6:13 PM CDT	Special Weather Statement	HUN	Limestone	32 min
Apr 29, 6:16 PM CDT	River Flood Warning	HUN	Madison	13 hr
Apr 29, 6:19 PM CDT	Special Weather Statement	HUN	Lawrence	26 min
Apr 29, 6:24 PM CDT	Special Weather Statement	HUN	Limestone, Madison, Morgan	36 min
Apr 29, 6:30 PM CDT	Flash Flood Warning	HUN	Colbert, Lauderdale, Lawrence, Limestone	90 min
Apr 29, 6:41 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison	34 min
Apr 28, 7:26 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	34 min
Apr 28, 7:52 PM CDT	Flash Flood Warning	HUN	Franklin, Lincoln, Moore	3 hr
Apr 28, 8:09 PM CDT	Tornado Warning Emergency	HUN	Lincoln	36 min
Apr 28, 8:11 PM CDT	Flash Flood Warning	HUN	Lincoln, Moore	3 hr
Apr 28, 8:27 PM CDT	Tornado Warning Emergency	HUN	Franklin, Lincoln, Moore	33 min
Apr 29, 4:41 PM CDT	Special Weather Statement	HUN	Lincoln	34 min
Apr 29, 5:05 PM CDT	Special Weather Statement	HUN	Moore	25 min
Apr 29, 5:46 PM CDT	Special Weather Statement	HUN	Lincoln	44 min
Apr 29, 6:46 PM CDT	Special Weather Statement	HUN	Lincoln	29 min

Nearby

Flash Flood Watches in Alabama, 2014 Flash Flood Watches in Tennessee, 2014 Every flash flood watch in 2014

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.