Alert archive / Iowa / Flash Flood Watches in 2018

Flash Flood Watch 12, NWS Des Moines, IA

September 6, 201811 counties in Iowa

NWS Des Moines, IA issued this flash flood watch at Sep 6, 2018, 3:01 PM CDT for 11 counties in Iowa. It took effect at Sep 7, 2018, 12:00 AM CDT. It was in force for 27 hr.

The area

The counties it named.

The facts

Issued: Sep 6, 2018, 3:01 PM CDT (20:01 UTC)
In effect from: Sep 7, 2018, 12:00 AM CDT
Expired: Sep 8, 2018, 3:20 AM CDT
In force: 27 hr
Issued by: NWS Des Moines, IA
Flood severity: None

Counties Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Ringgold County, IA, Wapello County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 98 km from the middle of the area, began a volume at 20:06 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.

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 Des Moines, IA wrote its last area forecast discussion before this flash flood watch went out at Sep 6, 12:40 PM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Sep 6, 12:40 PM CDT, 2 hours 21 minutes before

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Hazardous weather outlook, Sep 6, 10:47 AM CDT, 4 hours 14 minutes before

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<body>
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    <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>
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        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 Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 6, 5:56 AM CDT	River Flood Warning	DMX	Dallas, Greene	72 hr
Sep 6, 2:35 PM CDT	Areal Flood Warning	DMX	Butler	6 hr
Sep 6, 2:41 PM CDT	Areal Flood Warning	DMX	Mahaska	24 hr

Nearby

Flash Flood Watches in Iowa, 2018 Every flash flood watch in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.