Alert archive / Iowa / Heat Advisories in 2015

Heat Advisory 2, NWS Quad Cities, IA

July 12, 201510 counties in Iowa; 6 counties in Illinois

NWS Quad Cities, IA issued this heat advisory at Jul 12, 2015, 3:24 PM CDT for 10 counties in Iowa; 6 counties in Illinois. It took effect at Jul 13, 2015, 12:00 PM CDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jul 12, 2015, 3:24 PM CDT (20:24 UTC)
In effect from: Jul 13, 2015, 12:00 PM CDT
Expired: Jul 13, 2015, 8:00 PM CDT
In force: 8 hr
Issued by: NWS Quad Cities, IA

Counties Benton County, IA, Cedar County, IA, Clinton County, IA, Iowa County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Linn County, IA, Muscatine County, IA, Scott County, IA, Bureau County, IL, Carroll County, IL, Henry County, IL, Putnam County, IL, Rock Island County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 19 km from the middle of the area, began a volume at 20:28 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, 8.4 hours before the alert went out and 252 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: 606 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 79 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 12, 12:25 PM CDT, 2 hours 59 minutes earlier.

Area forecast discussion, Jul 12, 12:25 PM CDT, 2 hours 59 minutes before

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Hazardous weather outlook, Jul 12, 4:57 AM CDT, 10 hours 27 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 12, 3:31 AM CDT	Heat Advisory	DVN	Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 2 more	35 hr
Jul 11, 7:25 PM CDT	Flash Flood Warning	DVN	Hancock	4 hr
Jul 11, 7:59 PM CDT	River Flood Warning	DVN	Hancock, McDonough	4 days
Jul 11, 8:25 PM CDT	Flash Flood Warning	DVN	Clark	6 hr
Jul 11, 9:42 PM CDT	Special Weather Statement	DVN	Scotland	33 min

Nearby

Heat Advisories in Iowa, 2015 Heat Advisories in Illinois, 2015 Every heat advisory in 2015

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.