Alert archive / Iowa / Wind Chill Advisories in 2010

Wind Chill Advisory 4, NWS Quad Cities, IA

January 4, 201021 counties in Iowa; 7 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this wind chill advisory at Jan 4, 2010, 2:20 PM CST for 21 counties in Iowa; 7 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Jan 4, 2010, 9:00 PM CST. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued: Jan 4, 2010, 2:20 PM CST (20:20 UTC)
In effect from: Jan 4, 2010, 9:00 PM CST
Expired: Jan 5, 2010, 10:08 AM CST
In force: 13 hr
Issued by: NWS Quad Cities, IA

All 30 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, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 63 km from the middle of the area, began a volume at 20:25 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

Lincoln, IL (KILX), launched 12:00Z, 8.3 hours before the alert went out and 265 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: 685 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 18 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 4, 3:05 AM CST, 11 hours 15 minutes earlier.

Area forecast discussion, Jan 4, 3:05 AM CST, 11 hours 15 minutes before

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Hazardous weather outlook, Jan 4, 4:41 AM CST, 9 hours 39 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 3, 7:07 PM CST	River Flood Warning	DVN	Clinton, Scott	15 hr
Jan 4, 4:16 PM CST	River Flood Warning	DVN	Clinton, Scott	17 hr

Nearby

Wind Chill Advisories in Iowa, 2010 Wind Chill Advisories in Illinois, 2010 Wind Chill Advisories in Missouri, 2010 Every wind chill advisory in 2010

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.