Alert archive / Iowa / Wind Chill Advisories in 2008

Wind Chill Advisory 6, NWS Des Moines, IA

January 29, 200834 counties in Iowa

NWS Des Moines, IA issued this wind chill advisory at Jan 29, 2008, 4:25 AM CST for 34 counties in Iowa. It took effect at Jan 29, 2008, 12:00 PM CST. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: Jan 29, 2008, 4:25 AM CST (10:25 UTC)
In effect from: Jan 29, 2008, 12:00 PM CST
Expired: Jan 30, 2008, 8:00 AM CST
In force: 20 hr
Issued by: NWS Des Moines, IA

All 34 counties

Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Crawford County, IA, Dallas County, IA, Emmet County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Jasper County, IA, Kossuth County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Poweshiek County, IA, Sac County, IA, Story County, IA, Tama County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 73 km from the middle of the area, began a volume at 10:23 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

Minneapolis, MN (KMPX), launched 00:00Z, 10.4 hours before the alert went out and 274 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: 1274 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 294 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 wind chill advisory 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 wind chill advisory went out at Jan 29, 3:39 AM CST, 46 minutes earlier.

Area forecast discussion, Jan 29, 3:39 AM CST, 46 minutes before

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Hazardous weather outlook, Jan 29, 1:28 AM CST, 2 hours 57 minutes before

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  <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.
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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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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 29, 4:25 AM CST	Snow and Blowing Snow Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	14 hr
Jan 29, 6:43 AM CST	River Flood Warning	DMX	Lucas	10 hr
Jan 29, 7:39 AM CST	Winter Weather Advisory	DMX	Adair, Adams, Appanoose, Clarke, Dallas, Davis and 15 more	11 hr
Jan 29, 11:38 AM CST	Blizzard Warning	DMX	Cerro Gordo, Franklin, Hancock, Humboldt, Kossuth, Palo Alto and 4 more	6 hr
Jan 29, 3:55 PM CST	Wind Chill Warning	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Emmet, Franklin and 10 more	16 hr

Nearby

Wind Chill Advisories in Iowa, 2008 Every wind chill advisory in 2008

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.