Alert archive / Illinois / Flash Flood Warnings in 2013

Flash Flood Warning 31, NWS Chicago, IL

October 5, 2013Kankakee County, Illinois

NWS Chicago, IL issued this flash flood warning at Oct 5, 2013, 6:35 PM CDT for Kankakee County, Illinois. It was in force for 6 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: Oct 5, 2013, 6:35 PM CDT (23:35 UTC)
Expired: Oct 6, 2013, 12:30 AM CDT
In force: 6 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: None

County Kankakee County, IL

The radar

The Chicago radar (KLOT), 55 km from the middle of the area, began a volume at 23:36 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, 11.6 hours before the alert went out and 126 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: 774 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this flash flood warning went out at Oct 5, 5:19 PM CDT, 1 hour 16 minutes earlier.

Area forecast discussion, Oct 5, 5:19 PM CDT, 1 hour 16 minutes before

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Hazardous weather outlook, Oct 5, 4:05 PM CDT, 2 hours 30 minutes before

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In the hours before

Local storm report, Oct 5, 5:19 PM CDT, 1 hour 16 minutes before

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Local storm report, Oct 5, 5:42 PM CDT, 53 minutes before

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Special weather statement, Oct 5, 5:49 PM CDT, 46 minutes before

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Local storm report, Oct 5, 5:58 PM CDT, 37 minutes before

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Local storm report, Oct 5, 6:02 PM CDT, 33 minutes before

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Special weather statement, Oct 5, 6:25 PM CDT, 10 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 5, 2:22 AM CDT	Dense Fog Advisory	LOT	Lake, McHenry	6 hr
Oct 5, 1:28 PM CDT	Special Weather Statement	LOT	Boone	32 min
Oct 5, 3:22 PM CDT	Special Weather Statement	LOT	Kankakee, Will	53 min
Oct 5, 3:46 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Lake, Will	59 min
Oct 5, 3:49 PM CDT	Special Marine Warning	LOT		116 min
Oct 5, 4:09 PM CDT	Areal Flood Advisory	LOT	Cook, DuPage, Will	6 hr
Oct 5, 4:41 PM CDT	Areal Flood Advisory	LOT	Kankakee, Will	3 hr
Oct 5, 4:52 PM CDT	Special Weather Statement	LOT	Lake	23 min
Oct 5, 4:58 PM CDT	Areal Flood Advisory	LOT	Lake	6 hr
Oct 5, 5:49 PM CDT	Special Weather Statement	LOT	Kankakee	41 min
Oct 5, 2:26 PM CDT	Special Weather Statement	LOT	Benton	49 min
Oct 5, 6:25 PM CDT	Special Weather Statement	LOT	Lake	65 min

Nearby

Flash Flood Warnings in Illinois, 2013 Every flash flood warning in 2013

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.