Alert archive / Iowa / Special Weather Statements in 2013

Special Weather Statement, NWS Quad Cities, IA

October 4, 20134 counties in Iowa

NWS Quad Cities, IA issued this special weather statement at Oct 4, 2013, 5:04 AM CDT for 4 counties in Iowa. It was in force for 56 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 4, 2013, 5:04 AM CDT (10:04 UTC)
Expired: Oct 4, 2013, 6:00 AM CDT
In force: 56 min
Issued by: NWS Quad Cities, IA

Counties Cedar County, IA, Johnson County, IA, Jones County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 71 km from the middle of the area, began a volume at 10:05 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, 10.1 hours before the alert went out and 77 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: 1514 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 921 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.0

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 4, 3:39 AM CDT	Special Weather Statement	DVN	Benton, Iowa	81 min
Oct 4, 4:27 AM CDT	Special Weather Statement	DVN	Benton, Iowa, Johnson, Linn	93 min
Oct 4, 5:55 AM CDT	Special Weather Statement	DVN	Cedar, Jones	45 min
Oct 4, 6:37 AM CDT	Special Weather Statement	DVN	Cedar, Clinton, Jackson, Jones, Scott	38 min
Oct 4, 7:53 AM CDT	Special Weather Statement	DVN	Benton, Iowa, Linn	52 min
Oct 4, 8:27 AM CDT	Severe Thunderstorm Warning	DVN	Iowa	63 min
Oct 4, 8:44 AM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Johnson, Linn	46 min
Oct 4, 9:33 AM CDT	Special Weather Statement	DVN	Linn	57 min
Oct 4, 9:55 AM CDT	Special Weather Statement	DVN	Iowa	35 min
Oct 4, 5:59 PM CDT	Special Weather Statement	DVN	Dubuque	31 min
Oct 4, 1:05 PM CDT	Special Weather Statement	DVN	Henry	55 min
Oct 4, 1:18 PM CDT	Special Weather Statement	DVN	Whiteside	12 min

Nearby

Special Weather Statements in Iowa, 2013 Every special weather statement 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.