Alert archive / Iowa / Blizzard Watches in 2009

Blizzard Watch 1, NWS Quad Cities, IA

January 12, 200918 counties in Iowa; 9 counties in Illinois

NWS Quad Cities, IA issued this blizzard watch at Jan 12, 2009, 3:24 AM CST for 18 counties in Iowa; 9 counties in Illinois. It took effect at Jan 12, 2009, 6:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 12, 2009, 3:24 AM CST (09:24 UTC)
In effect from: Jan 12, 2009, 6:00 PM CST
Expired: Jan 12, 2009, 1:06 PM CST
In force
Issued by: NWS Quad Cities, IA

All 27 counties

Benton County, IA, Buchanan County, IA, Cedar County, IA, Clinton County, IA, Delaware 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, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, Henry County, IL, Jo Daviess County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 33 km from the middle of the area, began a volume at 09:25 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 9.4 hours before the alert went out and 381 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: 1259 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 81 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 blizzard 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 blizzard watch went out at Jan 11, 3:20 PM CST, 12 hours 4 minutes earlier.

Area forecast discussion, Jan 11, 3:20 PM CST, 12 hours 4 minutes before

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Hazardous weather outlook, Jan 11, 4:20 PM CST, 11 hours 4 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 12, 3:24 AM CST	Winter Weather Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more	23 hr
Jan 12, 1:06 PM CST	Blizzard Warning	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 10 more	11 hr
Jan 12, 1:06 PM CST	Winter Weather Advisory	DVN	Hancock, McDonough	14 hr

Nearby

Blizzard Watches in Iowa, 2009 Blizzard Watches in Illinois, 2009 Every blizzard watch in 2009

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.