Alert archive / Illinois / Excessive Heat Warnings in 2010

Excessive Heat Warning 3, NWS Lincoln, IL

August 3, 201027 counties in Illinois

NWS Lincoln, IL issued this excessive heat warning at Aug 3, 2010, 7:22 PM CDT for 27 counties in Illinois. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 3, 2010, 7:22 PM CDT (00:22 UTC)
Expired: Aug 4, 2010, 7:00 PM CDT
In force: 24 hr
Issued by: NWS Lincoln, IL

All 27 counties

Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Mason County, IL, Menard County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Vermilion County, IL

The radar

The Lincoln radar (KILX), 74 km from the middle of the area, began a volume at 00:24 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, 0.4 hours before the alert went out and 63 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: 4758 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 15.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this excessive heat warning 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 excessive heat warning went out at Aug 3, 6:23 PM CDT, 59 minutes earlier.

Area forecast discussion, Aug 3, 6:23 PM CDT, 59 minutes before

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Hazardous weather outlook, Aug 3, 3:45 PM CDT, 3 hours 37 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
Aug 4, 3:44 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Mason, Schuyler	61 min
Aug 4, 4:51 PM CDT	Special Weather Statement	ILX	Piatt	39 min
Aug 4, 5:06 PM CDT	Special Weather Statement	ILX	Vermilion	39 min
Aug 4, 6:01 PM CDT	Special Weather Statement	ILX	Vermilion	59 min
Aug 4, 6:13 PM CDT	Special Weather Statement	ILX	Champaign, Vermilion	62 min
Aug 4, 6:22 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Vermilion	53 min

Nearby

Excessive Heat Warnings in Illinois, 2010 Every excessive heat warning in 2010

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.