Alert archive / Iowa / Special Weather Statements in 2014

Special Weather Statement, NWS Quad Cities, IA

August 24, 20148 counties in Iowa; Hancock County, Henderson County, McDonough County, Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this special weather statement at Aug 24, 2014, 4:39 AM CDT for 8 counties in Iowa; Hancock County, Henderson County, McDonough County, Illinois; Clark County, Scotland County, Missouri. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 24, 2014, 4:39 AM CDT (09:39 UTC)
Expired: Aug 24, 2014, 8:00 AM CDT
In force: 3 hr
Issued by: NWS Quad Cities, IA

Counties Des Moines County, IA, Henry County, IA, Jefferson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Van Buren County, IA, Washington County, IA, Hancock County, IL, Henderson County, IL, McDonough County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 134 km from the middle of the area, began a volume at 09:43 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

Lincoln, IL (KILX), launched 00:00Z, 9.7 hours before the alert went out and 267 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: 2124 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1036 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.1

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 24, 3:32 AM CDT, 1 hour 7 minutes earlier.

Area forecast discussion, Aug 24, 3:32 AM CDT, 1 hour 7 minutes before

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Hazardous weather outlook, Aug 24, 3:58 AM CDT, 41 minutes before

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In the hours before

Special weather statement, Aug 24, 4:39 AM CDT, 0 minutes before

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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
Aug 24, 3:38 AM CDT	Heat Advisory	DVN	Des Moines, Henry, Lee, Van Buren	40 hr
Aug 24, 5:02 AM CDT	Dense Fog Advisory	DVN	Des Moines, Henry, Iowa, Jefferson, Keokuk, Lee and 3 more	4 hr
Aug 24, 6:37 AM CDT	Special Weather Statement	DVN	Benton, Cedar, Des Moines, Henry, Iowa, Jefferson and 8 more	113 min
Aug 24, 3:50 PM CDT	Heat Advisory	DVN	Louisa, Muscatine, Scott	28 hr

Nearby

Special Weather Statements in Iowa, 2014 Special Weather Statements in Illinois, 2014 Special Weather Statements in Missouri, 2014 Every special weather statement in 2014

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.