Alert archive / Iowa / Snow Advisories in 2007

Snow Advisory 7, NWS Quad Cities, IA

December 5, 200721 counties in Iowa; 13 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this snow advisory at Dec 5, 2007, 3:37 PM CST for 21 counties in Iowa; 13 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Dec 6, 2007, 12:00 PM CST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Dec 5, 2007, 3:37 PM CST (21:37 UTC)
In effect from: Dec 6, 2007, 12:00 PM CST
Expired: Dec 7, 2007, 12:20 AM CST
In force: 12 hr
Issued by: NWS Quad Cities, IA

All 36 counties

Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 41 km from the middle of the area, began a volume at 21:35 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, 9.6 hours before the alert went out and 47 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: 569 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: -117 m²/s²
0-3 km storm-relative helicity: 29 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 snow advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this snow advisory went out at Dec 5, 3:22 PM CST, 15 minutes earlier.

Area forecast discussion, Dec 5, 3:22 PM CST, 15 minutes before

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Hazardous weather outlook, Dec 5, 5:00 AM CST, 10 hours 37 minutes before

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In the hours before

Local storm report, Dec 5, 10:27 AM CST, 5 hours 10 minutes before

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Local storm report, Dec 5, 10:32 AM CST, 5 hours 5 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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Nearby

Snow Advisories in Iowa, 2007 Snow Advisories in Illinois, 2007 Snow Advisories in Missouri, 2007 Every snow 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.