Alert archive / Iowa / Winter Storm Warnings in 2019

Winter Storm Warning 5, NWS Quad Cities, IA

February 11, 201916 counties in Iowa; 5 counties in Illinois

NWS Quad Cities, IA issued this winter storm warning at Feb 11, 2019, 3:08 AM CST for 16 counties in Iowa; 5 counties in Illinois. It took effect at Feb 11, 2019, 3:00 PM CST. It was in force for 33 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: Feb 11, 2019, 3:08 AM CST (09:08 UTC)
In effect from: Feb 11, 2019, 3:00 PM CST
Expired: Feb 13, 2019, 12:00 AM CST
In force: 33 hr
Issued by: NWS Quad Cities, IA

All 21 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, Muscatine County, IA, Scott County, IA, Washington County, IA, Carroll County, IL, Jo Daviess County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 52 km from the middle of the area, began a volume at 09:08 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, 9.1 hours before the alert went out and 57 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: 487 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 250 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 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 winter storm warning went out at Feb 10, 11:05 PM CST, 4 hours 3 minutes earlier.

Area forecast discussion, Feb 10, 11:05 PM CST, 4 hours 3 minutes before

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Hazardous weather outlook, Feb 10, 4:20 PM CST, 10 hours 48 minutes before

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In the hours before

Special weather statement, Feb 10, 9:14 PM CST, 5 hours 54 minutes before

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Special weather statement, Feb 10, 9:19 PM CST, 5 hours 49 minutes before

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Special weather statement, Feb 10, 11:44 PM CST, 3 hours 24 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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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
Feb 11, 11:22 AM CST	Winter Weather Advisory	DVN	Des Moines, Henry, Lee, Louisa, Van Buren	37 hr

Nearby

Winter Storm Warnings in Iowa, 2019 Winter Storm Warnings in Illinois, 2019 Every winter storm warning in 2019

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.