Alert archive / Illinois / Flash Flood Watches in 2015

Flash Flood Watch 6, NWS Lincoln, IL

June 23, 201514 counties in Illinois

NWS Lincoln, IL issued this flash flood watch at Jun 23, 2015, 3:25 PM CDT for 14 counties in Illinois. It took effect at Jun 24, 2015, 7:00 PM CDT. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Jun 23, 2015, 3:25 PM CDT (20:25 UTC)
In effect from: Jun 24, 2015, 7:00 PM CDT
Expired: Jun 25, 2015, 11:08 AM CDT
In force: 16 hr
Issued by: NWS Lincoln, IL
Flood severity: None

Counties Cass County, IL, Fulton County, IL, Knox County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Peoria County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 54 km from the middle of the area, began a volume at 20:23 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, 8.4 hours before the alert went out and 112 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1163 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: 47 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 watch 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 flash flood watch went out at Jun 23, 3:14 PM CDT, 11 minutes earlier.

Area forecast discussion, Jun 23, 3:14 PM CDT, 11 minutes before

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Hazardous weather outlook, Jun 23, 12:00 PM CDT, 3 hours 25 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
Jun 22, 8:40 PM CDT	Tornado Warning	ILX	Stark	33 min
Jun 22, 8:54 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Schuyler	40 min

Nearby

Flash Flood Watches in Illinois, 2015 Every flash flood watch in 2015

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.