Alert archive / Illinois / Flash Flood Warnings in 2013

Flash Flood Warning 19, NWS Chicago, IL

June 22, 2013Ford County, Iroquois County, Livingston County, Illinois; Benton County, Indiana

NWS Chicago, IL issued this flash flood warning at Jun 22, 2013, 10:42 AM CDT for Ford County, Iroquois County, Livingston County, Illinois; Benton County, Indiana. 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: Jun 22, 2013, 10:42 AM CDT (15:42 UTC)
Expired: Jun 22, 2013, 4:30 PM CDT
In force: 6 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: None

Counties Ford County, IL, Iroquois County, IL, Livingston County, IL, Benton County, IN

The radar

The Chicago radar (KLOT), 100 km from the middle of the area, began a volume at 15:43 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, 3.7 hours before the alert went out and 82 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: 2564 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: -16 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 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 Jun 22, 9:28 AM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Jun 22, 9:28 AM CDT, 1 hour 14 minutes before

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Hazardous weather outlook, Jun 22, 4:11 AM CDT, 6 hours 31 minutes before

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In the hours before

Special weather statement, Jun 22, 9:21 AM CDT, 1 hour 21 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
Jun 22, 2:23 AM CDT	Special Weather Statement	LOT	DeKalb, DuPage, Kane	37 min
Jun 22, 5:05 AM CDT	Areal Flood Advisory	LOT	Lee, Ogle, Winnebago	5 hr
Jun 22, 9:21 AM CDT	Special Weather Statement	LOT	Boone, Ogle, Winnebago	54 min
Jun 22, 11:09 AM CDT	Special Weather Statement	LOT	Ford	51 min
Jun 22, 11:19 AM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois	56 min
Jun 22, 12:07 PM CDT	River Flood Advisory	LOT	Winnebago	8 hr
Jun 22, 12:07 PM CDT	River Flood Advisory	LOT	Winnebago	8 hr
Jun 22, 12:07 PM CDT	River Flood Advisory	LOT	Ogle	8 hr

Nearby

Flash Flood Warnings in Illinois, 2013 Flash Flood Warnings in Indiana, 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.