Flash Flood Warning 30, NWS Lincoln, IL

622 
WGUS73 KILX 172236 RRA
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
536 PM CDT Wed Jun 17 2026

ILC019-039-113-147-180030-
/O.CON.KILX.FF.W.0030.000000T0000Z-260618T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Champaign IL-De Witt IL-McLean IL-Piatt IL-
536 PM CDT Wed Jun 17 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM CDT THIS 
EVENING FOR NORTHEASTERN DE WITT, SOUTHEASTERN MCLEAN, NORTHERN 
PIATT AND NORTHERN CHAMPAIGN COUNTIES...

At 536 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1 and 4 inches of rain have 
fallen. Additional rainfall amounts up to 1 inch are possible in the 
warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Champaign, Bloomington, Urbana, Rantoul, Mahomet, St. Joseph, Le 
  Roy, Farmer City, Fisher, Thomasboro, Downs, Gifford, Mansfield, 
  Ogden, Saybrook, De Land, Bondville, Lake Of The Woods, Ludlow and 
  Bellflower.

This includes the following State Parks...
	Moraine View State Park.

This includes the following highways...
	 Interstate 72 between  mile markers 173 and 182.
	 Interstate 74 between  mile markers 134 and 197.
	 Interstate 55 between  mile markers 155 and 156.
	 Interstate 57 between  mile markers 235 and 257.

This includes the following streams and drainages...
  Stony Creek, Hillsbury Slough, Trenkle Slough, Timber Creek, Salt 
  Creek, Lone Tree Creek, West Fork Salt Creek, Sugar Creek, Owl 
  Creek, Long Point Creek, Spoon River, Dickerson Slough, Camp 
  Creek, Kaskaskia River, Kickapoo Creek, South Fork Camp Creek, 
  Upper Salt Fork Drainage Ditch, Lake Fork Special, Copper Slough, 
  Madden Creek, Prairie Creek, Buck Creek, Goose Creek, Little 
  Kickapoo Creek, Drummer Creek, Conkey Branch, Salt Fork, Wildcat 
  Slough, Sangamon River and Middle Fork Vermilion River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4044 8846 4040 8846 4040 8795 4038 8793
      4010 8794 4012 8868 4045 8908

FLASH FLOOD...RADAR INDICATED

$$

Deubelbeiss

249 
WGUS73 KILX 180025
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
725 PM CDT Wed Jun 17 2026

ILC019-039-113-147-180035-
/O.EXP.KILX.FF.W.0030.000000T0000Z-260618T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Champaign IL-De Witt IL-McLean IL-Piatt IL-
725 PM CDT Wed Jun 17 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 730 PM CDT THIS EVENING FOR 
NORTHEASTERN DE WITT, SOUTHEASTERN MCLEAN, NORTHERN PIATT AND 
NORTHERN CHAMPAIGN COUNTIES...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

&&

LAT...LON 4044 8846 4040 8846 4040 8795 4038 8793
      4010 8794 4012 8868 4045 8908

$$

Deubelbeiss

Area Forecast Discussion
National Weather Service Lincoln IL
316 PM CDT Wed Jun 17 2026

.KEY MESSAGES...

- A Tornado Watch is in effect until 10pm CDT for locations
  along and south of a Macomb to Chenoa line. All severe hazards
  are possible...with the greatest probability for strong
  tornadoes focusing south of a Springfield to Paris line.

- Quiet weather will prevail Thursday through Saturday...with
  the next chance for thunderstorms arriving by Sunday.

&&

.DISCUSSION...
Issued at 316 PM CDT Wed Jun 17 2026

19z/2pm mesoanalysis shows an outflow boundary left behind by
the morning convection along a Quincy...to Litchfield...to
Salem line. This is considerably further south than previously
thought: therefore the most significant risk for widespread
severe weather later this afternoon and evening has shifted
south as well. As such, the new Tornado Watch coordinated with
SPC does not include the far northern KILX CWA from the Peoria
area northward.

MLCAPEs are currently under 1000J/kg: however, as the boundary
mixes slowly northward this afternoon, the RAP suggests MLCAPEs
will increase into the 1500-2000J/kg along/southeast of a Quincy
to Champaign line over the next couple of hours. Impressive wind
fields aloft are contributing to very strong 0-6km bulk shear
of 60-80kt...while 0-1km shear values remain in the 30-40kt
range. Given marginal instability and extreme shear, am
expecting supercell thunderstorms to rapidly develop along/ahead
of a slowly advancing cold front across the Illinois River
Valley imminently. All severe hazards will be in play...including
damaging wind gusts in excess of 70mph, hail larger than
golf balls, and tornadoes. The Significant Tornado Parameter
(STP) is currently maximized closer to the outflow boundary
from central/northern Missouri across south-central Illinois,
but is progged to lift northward later this afternoon/evening.
At this time, it appears the highest probability of potentially
strong tornadoes will focus along/south of a Springfield to
Paris line.

Thunderstorms are currently developing in a band from
Galesburg/Rushville eastward to Pontiac/Champaign. CAMs have
generally sped up the development process, as well as the
gradual S/SE movement of the band. As a result, think the
primary severe risk will be focused along the I-72 corridor
between 4pm and 6pm, then will sink toward I-70 by 7pm to 9pm.
The primary line of convection will exit the far SE KILX CWA
around midnight: however, a few showers may linger further north
throughout the evening into the first part of the overnight.

A short-wave trough will bring a period of mid-level cloudiness
to central Illinois Thursday morning, with forecast soundings
suggesting the potential for a few light rain showers mostly
along/south of a Rushville to Robinson line where slight chance
PoPs (20%) are warranted. Once this wave departs, a return to
cool and mostly dry weather will be on tap for Friday and
Saturday. The next significant chance for precipitation will
hold off until late Saturday night into Sunday as a stronger
short-wave trough traverses the Plains and approaches from the
west. Given better deep-layer moisture and strong forcing, think
showers and thunderstorms will become widespread. The severe
weather risk remains uncertain at this time, with several
machine learning algorithms such as Colorado State and NSSL
keeping the greatest probabilities further south. A few NCAR
members do however suggest 15-30% probs northward into central
Illinois, so will need to keep an eye on mesoscale details as
the time nears.

&&

.AVIATION /18Z TAFS THROUGH 18Z THURSDAY/...
Issued at 1247 PM CDT Wed Jun 17 2026

Convection is ongoing across central Illinois early this
afternoon: however, 1740z/1240pm radar imagery shows the back
edge of the precip along a KGBG to KSPI line. Based on
radar/satellite trends, it appears the terminals will see a
couple hour break as the afternoon progresses before a final
line of thunderstorms forms from the Iowa/Missouri border
eastward into the area after 19z/20z. Following the latest
HRRR/RAP solution closely, have highlighted thunder with visbys
down to 1 mile at KPIA between 19z and 21z...then further south
to the I-72 sites between 22z and 00z. Once the convective line
settles further south, scattered showers will remain possible
until early evening. After that, am expecting skies to become
mostly clear through much of the evening before a layer of
mid-level clouds AOA 15,000ft spreads across the area by
Thursday morning. Winds are highly variable at the moment due to
ongoing storms, but will become southeasterly this
afternoon...then westerly this evening as a cold front passes.

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
Flood Watch until 10 PM CDT this evening for ILZ027>031-
036>038.
Wind Advisory until 7 PM CDT this evening for ILZ040>057-
061>063-066>068-071>073.

&&

KEY MESSAGES...Barnes
DISCUSSION...Barnes
AVIATION...Barnes

Hazardous Weather Outlook
National Weather Service Lincoln IL
328 PM CDT Wed Jun 17 2026

ILZ036>038-040>057-061>063-066>068-071>073-181100-
Fulton-Tazewell-McLean-Schuyler-Mason-Logan-De Witt-Piatt-Champaign-
Vermilion-Cass-Menard-Scott-Morgan-Sangamon-Christian-Macon-Moultrie-
Douglas-Coles-Edgar-Shelby-Cumberland-Clark-Effingham-Jasper-
Crawford-Clay-Richland-Lawrence-
328 PM CDT Wed Jun 17 2026

This Hazardous Weather Outlook is for central Illinois, east
central Illinois, southeast Illinois and west central Illinois.

.DAY ONE...Tonight.

A broken line of thunderstorms capable of all severe hazards will
settle southward through central Illinois late this afternoon and
evening. The strongest cells within the line will have the potential
to produce tornadoes, damaging wind gusts in excess of 70mph, and hail
large than golf balls. The highest probability for strong tornadoes
will focus along and south of a Springfield to Paris line.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will develop across the area late Saturday night into
Sunday. At this time it appears the severe weather risk will remain
low.

River flooding is ongoing for portions of central Illinois. Please
refer to the latest flood statements for details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed through 10pm this evening.

Expected storm motion is toward the east at 60-70mph.

ILZ027>031-181100-
Knox-Stark-Peoria-Marshall-Woodford-
328 PM CDT Wed Jun 17 2026

This Hazardous Weather Outlook is for central Illinois and west
central Illinois.

.DAY ONE...Tonight.

A few strong to severe thunderstorms capable of damaging wind gusts
and large hail will track across north-central Illinois late this
afternoon. The storms will drop south of the Peoria area by early
evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will develop across the area late Saturday night into
Sunday. At this time it appears the severe weather risk will remain
low.

River flooding is ongoing for portions of central Illinois. Please
refer to the latest flood statements for details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed through 5pm this afternoon.

Expected storm motion is toward the east at 60-70mph.

Barnes

Preliminary Local Storm Report
National Weather Service Lincoln IL
406 PM CDT Wed Jun 17 2026

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

0344 PM     Tstm Wnd Dmg     Wapella                 40.22N 88.96W
06/17/2026                   De Witt            IL   Emergency Mngr

            Power pole snapped at 106 N Locust street in
            Wapella.

&&

Preliminary Local Storm Report
National Weather Service Lincoln IL
408 PM CDT Wed Jun 17 2026

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

0350 PM     Tstm Wnd Dmg     2 E Clinton             40.15N 88.92W
06/17/2026                   De Witt            IL   Emergency Mngr

            Two power poles snapped along highway 10 and
            Weldon Springs road east of Clinton.
            Powerline hanging down.

&&

Preliminary Local Storm Report
National Weather Service Lincoln IL
411 PM CDT Wed Jun 17 2026

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

0330 PM     Rain             2 E Wapella             40.22N 88.92W
06/17/2026  M1.25 Inch       De Witt            IL   Emergency Mngr

            Had 1.25 inches of rain in an hour from 230
            to 330 pm.

&&

Preliminary Local Storm Report
National Weather Service Lincoln IL
412 PM CDT Wed Jun 17 2026

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

0351 PM     Rain             Washington              40.70N 89.42W
06/17/2026  M3.01 Inch       Tazewell           IL   Mesonet

            Mesonet station EW8799 Washington.

0355 PM     Rain             2 NW Metamora           40.81N 89.38W
06/17/2026  M2.53 Inch       Woodford           IL   Mesonet

            Mesonet station AU804 1 NW Metamora.

0355 PM     Rain             1 S Goodfield           40.61N 89.28W
06/17/2026  M2.46 Inch       Tazewell           IL   Mesonet

            Mesonet station DW8284 Goodfield.

&&

Preliminary Local Storm Report
National Weather Service Lincoln IL
414 PM CDT Wed Jun 17 2026

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

0348 PM     Flash Flood      Heyworth                40.32N 88.99W
06/17/2026                   McLean             IL   Public

            Report from mPING: Street/road flooding;
            Street/road closed; Vehicles stranded.

0406 PM     Flash Flood      Heyworth                40.31N 88.98W
06/17/2026                   McLean             IL   Emergency Mngr

            Low lying and Urban flooding in Heyworth.

&&

Preliminary Local Storm Report
National Weather Service Lincoln IL
417 PM CDT Wed Jun 17 2026

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

0347 PM     Flash Flood      Lexington               40.64N 88.78W
06/17/2026                   McLean             IL   Emergency Mngr

            Localized urban flooding in Lexington with 4
            inches of rain so far today.

&&