Alert archive / Iowa / Wind Chill Advisories in 2013

Wind Chill Advisory 1, NWS Quad Cities, IA

January 20, 201317 counties in Iowa; 6 counties in Illinois

NWS Quad Cities, IA issued this wind chill advisory at Jan 20, 2013, 3:06 PM CST for 17 counties in Iowa; 6 counties in Illinois. It took effect at Jan 21, 2013, 12:00 AM CST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jan 20, 2013, 3:06 PM CST (21:06 UTC)
In effect from: Jan 21, 2013, 12:00 AM CST
Expired: Jan 21, 2013, 3:00 PM CST
In force: 15 hr
Issued by: NWS Quad Cities, IA

All 23 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, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Washington County, IA, Carroll County, IL, Jo Daviess County, IL, Mercer County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 48 km from the middle of the area, began a volume at 21:03 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 12:00Z, 9.1 hours before the alert went out and 380 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: 985 m above ground
0-6 km bulk shear: 99 kt
0-1 km storm-relative helicity: -120 m²/s²
0-3 km storm-relative helicity: 35 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 Quad Cities, IA wrote its last area forecast discussion before this wind chill advisory went out at Jan 20, 3:01 PM CST, 5 minutes earlier.

Area forecast discussion, Jan 20, 3:01 PM CST, 5 minutes before

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Hazardous weather outlook, Jan 20, 4:25 AM CST, 10 hours 41 minutes before

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In the hours before

Special weather statement, Jan 20, 12:31 PM CST, 2 hours 35 minutes before

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Nearby

Wind Chill Advisories in Iowa, 2013 Wind Chill Advisories in Illinois, 2013 Every wind chill advisory in 2013

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.