Alert archive / Nebraska / Flash Flood Warnings in 2010

Flash Flood Warning 6, NWS Omaha, NE

June 12, 2010Boone County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jun 12, 2010, 2:36 AM CDT for Boone County, Nebraska. 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: Jun 12, 2010, 2:36 AM CDT (07:36 UTC)
Expired: Jun 12, 2010, 8:30 AM CDT
In force: 6 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

County Boone County, NE

The radar

The Omaha radar (KOAX), 148 km from the middle of the area, began a volume at 07:39 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 7.6 hours before the alert went out and 221 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: 1323 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 871 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 12.6

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 Omaha, NE wrote its last area forecast discussion before this flash flood warning went out at Jun 11, 3:28 PM CDT, 11 hours 8 minutes earlier.

Area forecast discussion, Jun 11, 3:28 PM CDT, 11 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>

Hazardous weather outlook, Jun 11, 5:34 PM CDT, 9 hours 2 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 Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 7:01 PM CDT	Areal Flood Warning	OAX	Washington	18 hr
Jun 11, 11:35 PM CDT	River Flood Warning	OAX	Platte	70 hr
Jun 12, 1:24 AM CDT	Areal Flood Warning	OAX	Pierce	6 hr
Jun 12, 3:09 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Seward	51 min
Jun 12, 6:21 AM CDT	Areal Flood Warning	OAX	Burt, Washington	36 hr
Jun 12, 8:09 AM CDT	River Flood Warning	OAX	Douglas	4 days
Jun 12, 8:55 AM CDT	River Flood Warning	OAX	Dodge	4 days
Jun 12, 9:21 AM CDT	River Flood Warning	OAX	Antelope	5 days
Jun 12, 9:26 AM CDT	Areal Flood Warning	OAX	Boone	12 hr
Jun 12, 3:40 PM CDT	Areal Flood Warning	OAX	Cass, Otoe	24 hr
Jun 12, 3:47 PM CDT	Flash Flood Watch	OAX	Gage, Jefferson, Johnson, Nemaha, Pawnee, Richardson	12 hr
Jun 12, 6:41 PM CDT	Areal Flood Warning	OAX	Douglas	30 hr

Nearby

Flash Flood Warnings in Nebraska, 2010 Every flash flood warning in 2010

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.