Alert archive / Iowa / Wind Chill Advisories in 2015

Wind Chill Advisory 14, NWS Des Moines, IA

February 27, 201517 counties in Iowa

NWS Des Moines, IA issued this wind chill advisory at Feb 27, 2015, 3:22 PM CST for 17 counties in Iowa. It took effect at Feb 28, 2015, 12:00 AM CST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Feb 27, 2015, 3:22 PM CST (21:22 UTC)
In effect from: Feb 28, 2015, 12:00 AM CST
Expired: Feb 28, 2015, 9:00 AM CST
In force: 9 hr
Issued by: NWS Des Moines, IA

Counties Black Hawk County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Jasper County, IA, Marshall County, IA, Poweshiek County, IA, Story County, IA, Tama County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA

The radar

The Des Moines radar (KDMX), 103 km from the middle of the area, began a volume at 21:27 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 12:00Z, 9.4 hours before the alert went out and 237 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: 888 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 22 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 Feb 27, 11:42 AM CST, 3 hours 40 minutes earlier.

Area forecast discussion, Feb 27, 11:42 AM CST, 3 hours 40 minutes before

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Hazardous weather outlook, Feb 27, 9:26 AM CST, 5 hours 56 minutes before

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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>
      <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
Feb 26, 9:48 PM CST	Wind Chill Advisory	DMX	Black Hawk, Boone, Bremer, Butler, Calhoun, Carroll and 29 more	11 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.