Alert archive / Iowa / Freezing Rain Advisories in 2007

Freezing Rain Advisory 4, NWS Des Moines, IA

February 24, 20076 counties in Iowa

NWS Des Moines, IA issued this freezing rain advisory at Feb 24, 2007, 3:57 AM CST for 6 counties in Iowa. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Feb 24, 2007, 3:57 AM CST (09:57 UTC)
Expired: Feb 24, 2007, 3:45 PM CST
In force: 12 hr
Issued by: NWS Des Moines, IA

Counties Appanoose County, IA, Davis County, IA, Lucas County, IA, Monroe County, IA, Wapello County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 118 km from the middle of the area, began a volume at 09:57 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 00:00Z, 10.0 hours before the alert went out and 297 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: 1472 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 191 m²/s²
0-3 km storm-relative helicity: 292 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 freezing rain 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 freezing rain advisory went out at Feb 23, 3:57 PM CST, 12 hours earlier.

Area forecast discussion, Feb 23, 3:57 PM CST, 12 hours before

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Hazardous weather outlook, Feb 23, 3:42 PM CST, 12 hours 15 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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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
Feb 24, 3:57 AM CST	Snow and Blowing Snow Advisory	DMX	Clarke, Decatur, Lucas, Ringgold, Taylor	23 hr
Feb 24, 3:45 PM CST	Blizzard Warning	DMX	Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 7 more	11 hr

Nearby

Freezing Rain Advisories in Iowa, 2007 Every freezing rain advisory in 2007

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.