Flash Flood Warning 27, NWS Lincoln, IL

948 
WGUS73 KILX 120237
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
937 PM CDT Thu Jun 11 2026

ILC021-115-137-147-167-120400-
/O.CON.KILX.FF.W.0027.000000T0000Z-260612T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Christian IL-Macon IL-Morgan IL-Piatt IL-Sangamon IL-
937 PM CDT Thu Jun 11 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 11 PM CDT THIS 
EVENING FOR NORTHERN CHRISTIAN, MACON, SOUTHERN PIATT, CENTRAL 
SANGAMON AND SOUTHEASTERN MORGAN COUNTIES...

At 936 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1 and 2 inches of rain have 
fallen. Flooding impacts will continue, but no additional rainfall 
is expected. 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...
  Springfield, Decatur, Chatham, Mount Zion, Auburn, Rochester, 
  Forsyth, Riverton, Pawnee, Bement, Cerro Gordo, Harristown, Long 
  Creek, Waverly, Atwood, Warrensburg, Blue Mound, Macon, Edinburg 
  and Illiopolis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 3959 9030 3992 8929 3998 8846 3979 8847
      3979 8876 3974 8876 3974 8881 3965 8881
      3966 8913 3952 9030

FLASH FLOOD...RADAR INDICATED

$$

37

985 
WGUS73 KILX 120357
FFSILX

Flash Flood Statement
National Weather Service Lincoln IL
1057 PM CDT Thu Jun 11 2026

ILC021-115-137-147-167-120407-
/O.EXP.KILX.FF.W.0027.000000T0000Z-260612T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Christian IL-Macon IL-Morgan IL-Piatt IL-Sangamon IL-
1057 PM CDT Thu Jun 11 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 11 PM CDT THIS EVENING FOR 
NORTHERN CHRISTIAN, MACON, SOUTHERN PIATT, CENTRAL SANGAMON AND 
SOUTHEASTERN MORGAN COUNTIES...

The rain has ended and flood waters are receding. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

&&

LAT...LON 3959 9030 3992 8929 3998 8846 3979 8847
      3979 8876 3974 8876 3974 8881 3965 8881
      3966 8913 3952 9030

$$

37

Area Forecast Discussion
National Weather Service Lincoln IL
Issued by National Weather Service Sioux Falls SD
654 PM CDT Thu Jun 11 2026

.KEY MESSAGES...

- A line of severe thunderstorms is forecast to produce damaging
  winds and several embedded tornadoes across central Illinois
  this evening (risk level 4 of 5). The window for the most
  intense storms will be 4-10pm.

- While the risk is lower (level 2 of 4), there could be some
  localized flooding with these storms as well, especially north
  of I-72 and west of I-57 where many locations received
  several inches of rainfall yesterday.

- More showers and thunderstorms are likely (60-80% chance)
  Saturday night, with a level 1 of 5 (marginal) risk for
  severe weather and excessive rainfall.

&&

.DISCUSSION...
Issued at 230 PM CDT Thu Jun 11 2026

***** SEVERE WEATHER OUTBREAK THIS EVENING *****

At 230pm, temperatures and dewpoints across central and southeast
Illinois were in the mid-upper 80s and mid 70s, respectively amidst
southerly flow, evapotranspiration "ET" (mostly evaporation this
early in the growing season), and sunshine. RAP mesoanalysis
suggests this is contributing to MLCAPE values of 1000-3500 J/kg - a
sharp gradient across the area with higher values to the south.
Surface heating should continue to boost both temperatures and
instability and reduce convective inhibition (CIN) throughout the
afternoon ahead of an approaching cold front, which will sweep the
area west-east during the mid to late evening hours. RAP/HRRR/NAM
suggest MLCAPE will peak around 4000-5000 J/kg with 35-45 kt deep
layer shear ahead of that front, which should provide sufficient
forcing to maintain the ongoing storms across west-central IL and
result in development further to the south. This highly volatile
convective environment should favor organized convection capable
initially of all severe hazards (tornadoes, large hail, and damaging
winds), with an increasing wind and quasilinear convective system
(QLCS) tornado threat as storms grow quickly upscale into bowing
lines. PWATs approaching 2 inches will favor precip loading,
especially in the taller cores which will feature melting hail,
while steep mid level lapse rates and wide CAPE profiles will
enhance potential for RIJ formation in bowing segments; this will
increase the risk for high-end (75+ mph) and long-duration (20+
minutes) straight-line winds which would result in swaths of
enhanced damage (trees down, shingle damage, power outages). SPC has
issued a level 4 of 5, "moderate," risk for severe weather, driven
by wind and tornadoes, which could be strong north of a Macomb to
Bloomington line. Winds ahead of these storms may gust up to 40 mph
from the south, as descending hydrometeors from anvils aid in
momentum transport from a 40-50 kt LLJ (strongest over northern IL).

***** LOW RISK FOR FLASH FLOODING *****

With some locations north of I-72 and west of I-57 having received
over 3 inches of rainfall yesterday (and multiple rounds of heavy
rainfall in days prior), there is concern that flash flooding could
occur with storms this afternoon and evening. This is especially
true with the ongoing training storms north of a roughly Macomb to
El Paso line. 3 hour FFG in some of these areas is under a half an
inch, and with various CAMs advertising 1 hour rain rates >1 inch it
makes sense there could be some issues, especially in urban and poor
drainage areas. A Flood Watch was issued for Cass to Dewitt, and
counties further north, in effect until 9pm.

***** LESS WARM AND MUGGY STARTING TONIGHT *****

Behind the cold front, conditions will turn much less humid and,
with some clearing, temperatures are forecast to fall into the mid
to upper 50s overnight west of roughly I-57. High temperatures
tomorrow should only climb into the low 80s, making it feel much
more pleasant heading into the weekend. Warm air advection (WAA)
will bring a slightly more humid airmass into the region tomorrow
night into Saturday ahead of another shortwave trough, but
convection to our southwest should limit the northward extent of
deep layer moisture - resulting in a low (albeit nonzero) risk for
severe weather and heavy rainfall Saturday/night in our neck of the
woods. Both SPC and WPC have us in marginal risks for each hazard.

Behind that second front, much cooler conditions return, with NBM
only giving a 15-30% chance high temperatures reach 75 degrees on
Sunday. Temperatures are slated to moderate gradually towards the
middle of next week, as southwest flow returns ahead of the next
upper level low pressure system.

&&

.AVIATION /00Z TAFS THROUGH 00Z SATURDAY/...
Issued at 640 PM CDT Thu Jun 11 2026

Strong to severe thunderstorms are currently moving through the
area. These storms are currently producing strong winds with
recorded gusts up to about 50 knots or potentially greater. A
tornado is also possible with this line of storms as it pushes
through the area. These storms are moving through quickly though
and will exit the area between 01z to 02z. Brief drops to MVFR
ceilings is expected in the storms and potentially for an hour
or so behind them as well. Visibility will drop to IFR levels
within the storm. The good news is that quiet conditions will
return in the wake of the departing thunderstorms. Winds will
remain out of the northwest before weakening this evening while
backing to out of the west. With calmer winds in place, there
could be isolated patches of fog or low stratus. However, the
probability of fog or low ceilings is low at a <=20% chance.
Have kept this potential omitted from all TAFs at this time but
trends will be monitored through the night. Otherwise, light
west/northwest winds are expected for the rest of the TAF period
as high pressure moves into the region.

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
Flood Watch until 9 PM CDT this evening for ILZ027>031-036>038-
040>043-047-048.

&&

KEY MESSAGES...Bumgardner
DISCUSSION...Bumgardner
AVIATION...Meyers

Hazardous Weather Outlook
National Weather Service Lincoln IL
405 PM CDT Thu Jun 11 2026

ILZ027>031-036>038-040>057-061-122115-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler-
Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-
Morgan-Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby-
405 PM CDT Thu Jun 11 2026

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

.DAY ONE...Tonight.

Severe thunderstorms are expected through this evening. Damaging
winds over 70 mph, large hail, and tornadoes are all possible with
the strongest storms. Heavy rain may also lead to flash flooding,
especially where heavy rain fell the last several days.

River flooding is ongoing or expected to develop along the Spoon, La
Moine, Illinois and Mackinaw Rivers.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Additional thunderstorms are expected Saturday night. A few of these
will be capable of producing strong wind gusts.

River flooding is ongoing or expected to develop along the Spoon, La
Moine, Mackinaw, and Illinois Rivers.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed through late this evening.

Expected storm motion is toward east between 35-45 mph.

ILZ062-063-066>068-071>073-122115-
Cumberland-Clark-Effingham-Jasper-Crawford-Clay-Richland-Lawrence-
405 PM CDT Thu Jun 11 2026

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

.DAY ONE...Tonight.

A line of severe thunderstorms is expected to move across the area
this evening. These storms will be capable of damaging wind gusts
and a couple tornadoes. In addition, locally heavy rain may
aggravate any lingering flooding from recent storms.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Additional thunderstorms are expected Saturday night. A few of these
will be capable of producing strong wind gusts.

Minor flooding will continue along the Wabash River into next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed through late this evening.

Expected storm motion is toward the east-southeast around 35-45 mph.

NMA

Preliminary Local Storm Report
National Weather Service Lincoln IL
720 PM CDT Thu Jun 11 2026

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

0709 PM     Tstm Wnd Dmg     1 N Bellflower          40.35N 88.53W
06/11/2026                   McLean             IL   Emergency Mngr

            Power poles blown down blocking the road.

&&

Erwin

Preliminary Local Storm Report
National Weather Service Lincoln IL
723 PM CDT Thu Jun 11 2026

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

0653 PM     Tstm Wnd Dmg     Kenney                  40.10N 89.08W
06/11/2026                   De Witt            IL   Emergency Mngr

            Power lines blown down on Kenney Street.

0719 PM     Tstm Wnd Dmg     3 SSW Mahomet           40.16N 88.43W
06/11/2026                   Champaign          IL   Emergency Mngr

            Power lines down at intersection of 1900N
            and 200E.

&&

Erwin

Preliminary Local Storm Report
National Weather Service Lincoln IL
738 PM CDT Thu Jun 11 2026

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

0630 PM     Tstm Wnd Dmg     Carlock                 40.58N 89.13W
06/11/2026                   McLean             IL   Emergency Mngr

            Large tree limbs, two feet in diameter or
            greater, blown down onto house resulting in
            structural damage. Time estimated by radar.

0635 PM     Tstm Wnd Dmg     Pleasant Plains         39.87N 89.92W
06/11/2026                   Sangamon           IL   Fire Dept/Rescue

            Large tree blown down onto powerlines. Time
            estimated by radar.

0650 PM     Tstm Wnd Dmg     Wapella                 40.22N 88.96W
06/11/2026                   De Witt            IL   Emergency Mngr

            Power line blown down, resulting in a fire
            in an alley. Time estimated by radar.

0705 PM     Tstm Wnd Dmg     Farmer City             40.25N 88.65W
06/11/2026                   De Witt            IL   Emergency Mngr

            Tree blown down blocking roadway in Farmer
            City. Time estimated by radar.

0720 PM     Tstm Wnd Gst     1 N Farmingdale         39.84N 89.81W
06/11/2026  E60 MPH          Sangamon           IL   Emergency Mngr

            Estimated gusts of 50-60 mph.

0720 PM     Tstm Wnd Gst     2 WNW Seymour           40.12N 88.46W
06/11/2026  E60 MPH          Champaign          IL   Trained Spotter

            Estimating 55-60 mph gusts. Report relayed
            by county EM.

0720 PM     Tstm Wnd Dmg     3 NE Fisher             40.35N 88.32W
06/11/2026                   Champaign          IL   Public

0730 PM     Tstm Wnd Dmg     2 NW Leland Grove       39.80N 89.72W
06/11/2026                   Sangamon           IL   Emergency Mngr

            Tree damage noted on the west side of
            Springfield.

0730 PM     Tstm Wnd Dmg     Jacksonville            39.73N 90.23W
06/11/2026                   Morgan             IL   Emergency Mngr

            Trees blown down onto houses and roadways.

0731 PM     Tstm Wnd Gst     Willard Airport         40.04N 88.28W
06/11/2026  M68 MPH          Champaign          IL   ASOS

0733 PM     Tstm Wnd Gst     1 WNW Springfield       39.81N 89.67W
06/11/2026  E60 MPH          Sangamon           IL   Local Official

0733 PM     Tstm Wnd Dmg     Champaign               40.11N 88.26W
06/11/2026                   Champaign          IL   Broadcast Media

            Webcam photo showing damage at the top of a
            tall building.

&&

Erwin

Preliminary Local Storm Report
National Weather Service Lincoln IL
740 PM CDT Thu Jun 11 2026

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

0615 PM     Tstm Wnd Dmg     1 ESE Morton            40.60N 89.44W
06/11/2026                   Tazewell           IL   Trained Spotter

            Trees snapped, approximately two feet in
            diameter. Other branches blown down.

0735 PM     Tstm Wnd Gst     Capital Airport         39.84N 89.68W
06/11/2026  M68 MPH          Sangamon           IL   ASOS

&&

Erwin

Preliminary Local Storm Report
National Weather Service Lincoln IL
753 PM CDT Thu Jun 11 2026

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

0720 PM     Funnel Cloud     Rossville               40.38N 87.66W
06/11/2026                   Vermilion          IL   Trained Spotter

            Report relayed by county EM.

0722 PM     Tstm Wnd Gst     2 NNE Curran            39.77N 89.75W
06/11/2026  M60 MPH          Sangamon           IL   Mesonet

            Personal weather station.

0739 PM     Funnel Cloud     Oakwood                 40.12N 87.78W
06/11/2026                   Vermilion          IL   Trained Spotter

            Funnel cloud on the southern edge of the
            storm.

0740 PM     Tstm Wnd Gst     Warrensburg             39.93N 89.06W
06/11/2026  E60 MPH          Macon              IL   Emergency Mngr

0746 PM     Tstm Wnd Gst     4 SW Henning            40.26N 87.75W
06/11/2026  E75 MPH          Vermilion          IL   Trained Spotter

&&

Erwin

Preliminary Local Storm Report
National Weather Service Lincoln IL
755 PM CDT Thu Jun 11 2026

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

0747 PM     Tornado          1 S Hoopeston           40.45N 87.67W
06/11/2026                   Vermilion          IL   Trained Spotter

            Tornado reported south of Hoopeston. Report
            relayed by county EM.

&&

Erwin