Alert archive / Iowa / Areal Flood Warnings in 2014

Areal Flood Warning 21, NWS Omaha, NE

October 1, 2014Fremont County, Iowa

NWS Omaha, NE issued this areal flood warning at Oct 1, 2014, 9:55 PM CDT for Fremont County, Iowa. It was in force for 12 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 1, 2014, 9:55 PM CDT (02:55 UTC)
Expired: Oct 2, 2014, 10:00 AM CDT
In force: 12 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

County Fremont County, IA

The radar

The Omaha radar (KOAX), 90 km from the middle of the area, began a volume at 02:56 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

Omaha, NE (KOAX), launched 00:00Z, 2.9 hours before the alert went out and 91 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: 1248 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 904 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -70 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: -0.4
Supercell composite: -2.9

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 Omaha, NE wrote its last area forecast discussion before this areal flood warning went out at Oct 1, 7:09 PM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Oct 1, 7:09 PM CDT, 2 hours 46 minutes before

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Hazardous weather outlook, Oct 1, 5:48 PM CDT, 4 hours 7 minutes before

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<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.
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        Please try again in a few minutes.
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The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 1, 10:20 PM CDT	Special Weather Statement	OAX	Boone	40 min
Oct 1, 11:02 PM CDT	Special Weather Statement	OAX	Dodge	43 min
Oct 2, 3:51 AM CDT	Special Weather Statement	OAX	Jefferson	39 min
Oct 2, 4:42 AM CDT	Special Weather Statement	OAX	Saline	48 min
Oct 2, 5:24 AM CDT	Special Weather Statement	OAX	Johnson	51 min
Oct 2, 5:54 AM CDT	Special Weather Statement	OAX	Johnson, Nemaha	51 min
Oct 2, 6:31 AM CDT	Special Weather Statement	OAX	Nemaha	29 min

Nearby

Areal Flood Warnings in Iowa, 2014 Every areal flood warning 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.