Alert archive / Iowa / Areal Flood Warnings in 2016

Areal Flood Warning 10, NWS Des Moines, IA

September 23, 2016Butler County, Franklin County, Iowa

NWS Des Moines, IA issued this areal flood warning at Sep 23, 2016, 5:19 AM CDT for Butler County, Franklin County, Iowa. 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: Sep 23, 2016, 5:19 AM CDT (10:19 UTC)
Expired: Sep 23, 2016, 11:15 AM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Butler County, IA, Franklin County, IA

The radar

The Des Moines radar (KDMX), 125 km from the middle of the area, began a volume at 10:22 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

Davenport, (KDVN), launched 00:00Z, 10.3 hours before the alert went out and 242 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: 580 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1227 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Des Moines, IA wrote its last area forecast discussion before this areal flood warning went out at Sep 23, 4:03 AM CDT, 1 hour 16 minutes earlier.

Area forecast discussion, Sep 23, 4:03 AM CDT, 1 hour 16 minutes before

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Hazardous weather outlook, Sep 23, 4:28 AM CDT, 51 minutes before

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In the hours before

Local storm report, Sep 23, 12:31 AM CDT, 4 hours 48 minutes before

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Local storm report, Sep 23, 12:32 AM CDT, 4 hours 47 minutes before

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Local storm report, Sep 23, 12:36 AM CDT, 4 hours 43 minutes before

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Local storm report, Sep 23, 12:39 AM CDT, 4 hours 40 minutes before

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Local storm report, Sep 23, 12:40 AM CDT, 4 hours 39 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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      <p id="message2">
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Sep 23, 12:52 AM CDT, 4 hours 27 minutes before

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      <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.
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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 22, 9:16 PM CDT	Special Weather Statement	DMX	Polk	29 min
Sep 22, 9:37 PM CDT	Flash Flood Warning	DMX	Story	6 hr
Sep 22, 11:24 PM CDT	Flash Flood Warning	DMX	Bremer, Butler, Cerro Gordo, Franklin	6 hr
Sep 23, 12:22 AM CDT	River Flood Warning	DMX	Story	31 hr
Sep 23, 1:14 AM CDT	River Flood Warning	DMX	Polk, Story	33 hr
Sep 23, 1:22 AM CDT	Flash Flood Warning	DMX	Hancock, Wright	6 hr
Sep 23, 3:36 AM CDT	Flash Flood Warning	DMX	Franklin, Humboldt, Kossuth, Wright	6 hr
Sep 23, 5:42 AM CDT	Flash Flood Warning	DMX	Palo Alto, Pocahontas	4 hr
Sep 23, 7:15 AM CDT	Areal Flood Warning	DMX	Hancock, Wright	4 hr
Sep 23, 11:12 AM CDT	Areal Flood Warning	DMX	Black Hawk, Bremer, Butler, Franklin, Hancock, Wright	48 hr

Nearby

Areal Flood Warnings in Iowa, 2016 Every areal flood warning in 2016

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.