Alert archive / Illinois / Flash Flood Warnings in 2014

Flash Flood Warning 19, NWS Chicago, IL

July 12, 2014Ford County, Livingston County, Illinois

NWS Chicago, IL issued this flash flood warning at Jul 12, 2014, 12:05 PM CDT for Ford County, Livingston County, Illinois. It was in force for 3 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: Jul 12, 2014, 12:05 PM CDT (17:05 UTC)
Expired: Jul 12, 2014, 3:00 PM CDT
In force: 3 hr
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Flood severity: None

Counties Ford County, IL, Livingston County, IL

The radar

The Chicago radar (KLOT), 99 km from the middle of the area, began a volume at 17:07 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, 5.1 hours before the alert went out and 68 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: 1263 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 908 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

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 Jul 12, 11:27 AM CDT, 38 minutes earlier.

Area forecast discussion, Jul 12, 11:27 AM CDT, 38 minutes before

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Hazardous weather outlook, Jul 12, 11:13 AM CDT, 52 minutes before

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In the hours before

Local storm report, Jul 12, 9:14 AM CDT, 2 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
914 AM CDT SAT JUL 12 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 AM     HEAVY RAIN       MANHATTAN               41.43N 87.99W
07/12/2014  M2.68 INCH       WILL               IL   CO-OP OBSERVER

            24 HOUR TOTAL

&&

ACS

Local storm report, Jul 12, 9:43 AM CDT, 2 hours 22 minutes before

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Local storm report, Jul 12, 10:52 AM CDT, 1 hour 13 minutes before

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Local storm report, Jul 12, 10:54 AM CDT, 1 hour 11 minutes before

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Local storm report, Jul 12, 11:27 AM CDT, 38 minutes before

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Local storm report, Jul 12, 11:45 AM CDT, 20 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
Jul 12, 7:29 AM CDT	Areal Flood Advisory	LOT	Cook, Kankakee, Will	4 hr
Jul 12, 7:38 AM CDT	Areal Flood Advisory	LOT	Ford, Livingston	6 hr
Jul 12, 8:12 AM CDT	Flash Flood Warning	LOT	Ford, Livingston	4 hr
Jul 12, 9:19 AM CDT	Flash Flood Warning	LOT	Cook, Will	4 hr
Jul 12, 11:36 AM CDT	Areal Flood Warning	LOT	Cook, Will	4 hr
Jul 12, 2:36 PM CDT	Areal Flood Warning	LOT	Ford, Livingston	4 hr
Jul 12, 3:21 PM CDT	Flash Flood Watch	LOT	Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more	14 hr

Nearby

Flash Flood Warnings in Illinois, 2014 Every flash flood warning in 2014

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.