Alert archive / Iowa / Special Weather Statements in 2012

Special Weather Statement, NWS Quad Cities, IA

October 22, 20124 counties in Iowa

NWS Quad Cities, IA issued this special weather statement at Oct 22, 2012, 6:13 AM CDT for 4 counties in Iowa. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 22, 2012, 6:13 AM CDT (11:13 UTC)
Expired: Oct 22, 2012, 7:15 AM CDT
In force: 62 min
Issued by: NWS Quad Cities, IA

Counties Iowa County, IA, Jefferson County, IA, Keokuk County, IA, Washington County, IA

The radar

The Des Moines radar (KDMX), 135 km from the middle of the area, began a volume at 11:12 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, 11.2 hours before the alert went out and 146 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: 20 J/kg
Mixed-layer CIN: -405 J/kg
Mixed-layer LCL: 1138 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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
Oct 22, 6:49 AM CDT	Special Weather Statement	DVN	Benton, Des Moines, Iowa, Johnson, Louisa, Muscatine and 1 more	56 min
Oct 22, 7:16 AM CDT	Special Weather Statement	DVN	Benton, Buchanan, Cedar, Johnson, Jones, Linn and 2 more	59 min
Oct 22, 7:50 AM CDT	Special Weather Statement	DVN	Cedar, Clinton, Delaware, Jones, Linn, Muscatine and 1 more	55 min
Oct 22, 8:41 AM CDT	Special Weather Statement	DVN	Clinton, Delaware, Dubuque, Jackson, Scott	79 min
Oct 22, 6:16 AM CDT	Special Weather Statement	DVN	Hancock	59 min
Oct 22, 7:40 AM CDT	Special Weather Statement	DVN	Warren	65 min
Oct 22, 9:32 AM CDT	Special Weather Statement	DVN	Carroll, Jo Daviess, Stephenson	58 min

Nearby

Special Weather Statements in Iowa, 2012 Every special weather statement in 2012

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.