Alert archive / Illinois / Flood Watches in 2025

Flood Watch 3, NWS Lincoln, IL

July 11, 2025Knox County, Marshall County, Stark County, Illinois

NWS Lincoln, IL issued this flood watch at Jul 11, 2025, 2:49 AM CDT for Knox County, Marshall County, Stark County, Illinois. It took effect at Jul 11, 2025, 4:00 PM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Jul 11, 2025, 2:49 AM CDT (07:49 UTC)
In effect from
Jul 11, 2025, 4:00 PM CDT
Expired
Jul 12, 2025, 1:00 AM CDT
In force
9 hr
Issued by
NWS Lincoln, IL
Flood severity
None

Counties Knox County, IL, Marshall County, IL, Stark County, IL

The radar

The Quad Cities radar (KDVN), 94 km from the middle of the area, began a volume at 07:49 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

Davenport, (KDVN), launched 00:00Z, 7.8 hours before the alert went out and 90 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2025-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2407 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2025-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2407 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1108 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
1.8
Supercell composite
12.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this 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 flood watch went out at Jul 11, 12:06 AM CDT, 2 hours 43 minutes earlier.

Area forecast discussion, Jul 11, 12:06 AM CDT, 2 hours 43 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 10:29 PM CDTSevere Thunderstorm WarningILXKnox40 min
Jul 10, 10:53 PM CDTSevere Thunderstorm WarningILXStark50 min
Jul 10, 11:22 PM CDTSevere Thunderstorm WarningILXMarshall38 min

Nearby

Flood Watches in Illinois, 2025Every flood watch in 2025

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.