Alert archive / Iowa / Winter Storm Watches in 2013

Winter Storm Watch 2, NWS Des Moines, IA

January 29, 201332 counties in Iowa

NWS Des Moines, IA issued this winter storm watch at Jan 29, 2013, 3:59 AM CST for 32 counties in Iowa. It took effect at Jan 29, 2013, 6:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 29, 2013, 3:59 AM CST (09:59 UTC)
In effect from: Jan 29, 2013, 6:00 PM CST
Expired: Jan 29, 2013, 12:01 PM CST
In force
Issued by: NWS Des Moines, IA

All 32 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Grundy County, IA, Guthrie County, IA, Hardin County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 36 km from the middle of the area, began a volume at 10:00 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

Davenport, (KDVN), launched 00:00Z, 10.0 hours before the alert went out and 243 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: 483 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 263 m²/s²
0-3 km storm-relative helicity: 328 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 Des Moines, IA wrote its last area forecast discussion before this winter storm watch went out at Jan 29, 3:49 AM CST, 10 minutes earlier.

Area forecast discussion, Jan 29, 3:49 AM CST, 10 minutes before

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Hazardous weather outlook, Jan 28, 10:59 PM CST, 5 hours before

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In the hours before

Special weather statement, Jan 28, 10:12 PM CST, 5 hours 47 minutes before

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Special weather statement, Jan 29, 12:48 AM CST, 3 hours 11 minutes before

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Special weather statement, Jan 29, 3:01 AM CST, 58 minutes before

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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 29, 12:01 PM CST	Winter Storm Warning	DMX	Adair, Adams, Appanoose, Black Hawk, Boone, Bremer and 24 more	24 hr
Jan 29, 12:01 PM CST	Winter Weather Advisory	DMX	Audubon, Carroll, Cass, Cerro Gordo, Franklin, Greene and 4 more	24 hr

Nearby

Winter Storm Watches in Iowa, 2013 Every winter storm watch 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.