Alert archive / Iowa / Winter Storm Watches in 2007

Winter Storm Watch 3, NWS Quad Cities, IA

February 22, 200713 counties in Iowa; 8 counties in Illinois

NWS Quad Cities, IA issued this winter storm watch at Feb 22, 2007, 4:08 AM CST for 13 counties in Iowa; 8 counties in Illinois. It took effect at Feb 24, 2007, 6:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 22, 2007, 4:08 AM CST (10:08 UTC)
In effect from: Feb 24, 2007, 6:00 AM CST
Expired: Feb 24, 2007, 4:20 AM CST
In force
Issued by: NWS Quad Cities, IA

All 21 counties

Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Muscatine County, IA, Scott County, IA, Bureau County, IL, Carroll County, IL, Henry County, IL, Jo Daviess County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 35 km from the middle of the area, began a volume at 10:11 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 10.1 hours before the alert went out and 358 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: 1405 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 242 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 winter storm watch 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 winter storm watch went out at Feb 22, 3:18 AM CST, 50 minutes earlier.

Area forecast discussion, Feb 22, 3:18 AM CST, 50 minutes before

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Nearby

Winter Storm Watches in Iowa, 2007 Winter Storm Watches in Illinois, 2007 Every winter storm watch 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.