Alert archive / Illinois / Ice Storm Warnings in 2007

Ice Storm Warning 1, NWS Quad Cities, IA

January 12, 2007Lee County, Iowa; 4 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this ice storm warning at Jan 12, 2007, 3:48 PM CST for Lee County, Iowa; 4 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Jan 12, 2007, 4:00 PM CST. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 12, 2007, 3:48 PM CST (21:48 UTC)
In effect from: Jan 12, 2007, 4:00 PM CST
Expired: Jan 13, 2007, 4:16 AM CST
In force: 12 hr
Issued by: NWS Quad Cities, IA

Counties Lee County, IA, Hancock County, IL, Henderson County, IL, McDonough County, IL, Warren County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 128 km from the middle of the area, began a volume at 21:47 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, 9.8 hours before the alert went out and 229 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: 749 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 206 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 ice storm warning 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 ice storm warning went out at Jan 12, 3:00 PM CST, 48 minutes earlier.

Area forecast discussion, Jan 12, 3:00 PM CST, 48 minutes before

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Hazardous weather outlook, Jan 12, 3:20 PM CST, 28 minutes before

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In the hours before

Local storm report, Jan 12, 10:27 AM CST, 5 hours 21 minutes before

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Local storm report, Jan 12, 10:32 AM CST, 5 hours 16 minutes before

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Local storm report, Jan 12, 11:48 AM CST, 4 hours before

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Local storm report, Jan 12, 12:33 PM CST, 3 hours 15 minutes before

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Local storm report, Jan 12, 12:40 PM CST, 3 hours 8 minutes before

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Local storm report, Jan 12, 1:11 PM CST, 2 hours 37 minutes before

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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 12, 10:59 AM CST	Winter Weather Advisory	DVN	Des Moines, Lee	5 hr
Jan 12, 3:48 PM CST	Winter Weather Advisory	DVN	Des Moines, Henry, Jefferson, Keokuk, Louisa, Muscatine and 3 more	12 hr

Nearby

Ice Storm Warnings in Illinois, 2007 Ice Storm Warnings in Missouri, 2007 Ice Storm Warnings in Iowa, 2007 Every ice storm warning 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.