Alert archive / Iowa / Blowing Snow Advisories in 2008

Blowing Snow Advisory 2, NWS Des Moines, IA

January 28, 200827 counties in Iowa

NWS Des Moines, IA issued this blowing snow advisory at Jan 28, 2008, 3:50 PM CST for 27 counties in Iowa. It took effect at Jan 29, 2008, 9:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 28, 2008, 3:50 PM CST (21:50 UTC)
In effect from: Jan 29, 2008, 9:00 AM CST
Expired: Jan 29, 2008, 4:25 AM CST
In force
Issued by: NWS Des Moines, IA

All 27 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, Emmet County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Kossuth County, IA, Marshall County, IA, Palo Alto County, IA, Pocahontas 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), 97 km from the middle of the area, began a volume at 21:51 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, 9.8 hours before the alert went out and 257 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: 1603 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 319 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 blowing snow 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 blowing snow advisory went out at Jan 28, 3:31 PM CST, 19 minutes earlier.

Area forecast discussion, Jan 28, 3:31 PM CST, 19 minutes before

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Hazardous weather outlook, Jan 28, 3:49 PM CST, 1 minute before

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      <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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        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
Jan 28, 3:54 AM CST	Wind Advisory	DMX	Appanoose, Davis, Mahaska, Monroe, Wapello	12 hr
Jan 28, 3:58 PM CST	Wind Advisory	DMX	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more	20 hr

Nearby

Blowing Snow Advisories in Iowa, 2008 Every blowing snow 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.