Alert archive / Iowa / Wind Chill Advisories in 2015

Wind Chill Advisory 1, NWS Des Moines, IA

January 4, 201543 counties in Iowa

NWS Des Moines, IA issued this wind chill advisory at Jan 4, 2015, 6:07 AM CST for 43 counties in Iowa. It was in force for 27 hr.

The area

The counties it named.

The facts

Issued: Jan 4, 2015, 6:07 AM CST (12:07 UTC)
Expired: Jan 5, 2015, 9:00 AM CST
In force: 27 hr
Issued by: NWS Des Moines, IA

All 43 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass 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, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Sac County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 46 km from the middle of the area, began a volume at 12:08 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 12:00Z, 0.1 hours before the alert went out and 228 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: 1146 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -110 m²/s²
0-3 km storm-relative helicity: 23 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 4, 5:15 AM CST, 52 minutes earlier.

Area forecast discussion, Jan 4, 5:15 AM CST, 52 minutes before

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Hazardous weather outlook, Jan 4, 4:35 AM CST, 1 hour 32 minutes before

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In the hours before

Local storm report, Jan 4, 3:15 AM CST, 2 hours 52 minutes before

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Local storm report, Jan 4, 3:28 AM CST, 2 hours 39 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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      <p id="message2">
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Local storm report, Jan 4, 6:01 AM CST, 6 minutes before

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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
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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.
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      <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 3, 6:32 PM CST	Blizzard Warning	DMX	Emmet, Kossuth, Palo Alto, Winnebago	6 hr
Jan 3, 6:32 PM CST	Winter Weather Advisory	DMX	Emmet, Kossuth, Palo Alto, Winnebago	11 hr
Jan 4, 4:00 AM CST	Winter Storm Watch	DMX	Audubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 31 more	24 hr
Jan 4, 3:42 PM CST	Winter Storm Warning	DMX	Audubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 30 more	31 hr

Nearby

Wind Chill Advisories in Iowa, 2015 Every wind chill advisory in 2015

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.