Alert archive / Illinois / Heat Advisories in 2011

Heat Advisory 6, NWS Lincoln, IL

July 29, 20118 counties in Illinois

NWS Lincoln, IL issued this heat advisory at Jul 29, 2011, 10:32 AM CDT for 8 counties in Illinois. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jul 29, 2011, 10:32 AM CDT (15:32 UTC)
Expired: Jul 29, 2011, 7:00 PM CDT
In force: 8 hr
Issued by: NWS Lincoln, IL

Counties Clark County, IL, Clay County, IL, Crawford County, IL, Cumberland County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Richland County, IL

The radar

The Evansville,IN radar (KVWX), 87 km from the middle of the area, began a volume at 15:29 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, 3.5 hours before the alert went out and 137 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: 1383 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 Lincoln, IL wrote its last area forecast discussion before this heat advisory went out at Jul 29, 6:23 AM CDT, 4 hours 9 minutes earlier.

Area forecast discussion, Jul 29, 6:23 AM CDT, 4 hours 9 minutes before

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Hazardous weather outlook, Jul 29, 6:10 AM CDT, 4 hours 22 minutes before

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In the hours before

Local storm report, Jul 29, 7:20 AM CDT, 3 hours 12 minutes before

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Local storm report, Jul 29, 8:22 AM CDT, 2 hours 10 minutes before

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Local storm report, Jul 29, 8:53 AM CDT, 1 hour 39 minutes before

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The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 5:20 PM CDT	Areal Flood Advisory	ILX	Edgar, Vermilion	4 hr
Jul 29, 5:28 PM CDT	Special Weather Statement	ILX	Clark	62 min
Jul 29, 6:25 PM CDT	Areal Flood Advisory	ILX	Clark	4 hr

Nearby

Heat Advisories in Illinois, 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.