Alert archive / Iowa / Heat Advisories in 2011

Heat Advisory 3, NWS Quad Cities, IA

July 10, 20118 counties in Iowa; 5 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this heat advisory at Jul 10, 2011, 1:58 PM CDT for 8 counties in Iowa; 5 counties in Illinois; Clark County, Scotland County, Missouri. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jul 10, 2011, 1:58 PM CDT (18:58 UTC)
Expired: Jul 10, 2011, 7:00 PM CDT
In force: 5 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, Mercer County, IL, Warren County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 109 km from the middle of the area, began a volume at 18:59 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 12:00Z, 7.0 hours before the alert went out and 251 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: 449 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 863 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 65 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 heat advisory 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 heat advisory went out at Jul 10, 3:40 AM CDT, 10 hours 18 minutes earlier.

Area forecast discussion, Jul 10, 3:40 AM CDT, 10 hours 18 minutes before

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Hazardous weather outlook, Jul 10, 5:03 AM CDT, 8 hours 55 minutes before

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In the hours before

Special weather statement, Jul 10, 10:35 AM CDT, 3 hours 23 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
Jul 10, 10:35 AM CDT	Special Weather Statement	DVN	Benton, Buchanan, Delaware, Dubuque, Iowa, Johnson and 2 more	55 min

Nearby

Heat Advisories in Iowa, 2011 Heat Advisories in Illinois, 2011 Heat Advisories in Missouri, 2011 Every heat advisory in 2011

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.