Bridgeport, Illinois Weather Forecast Discussion

546
FXUS63 KILX 231947
AFDILX
Area Forecast Discussion
National Weather Service Lincoln IL
247 PM CDT Tue Sep 23 2025
.KEY MESSAGES...
- Rain with isolated thunderstorms will spread across most of
  central IL from the Illinois River eastward this afternoon and
  evening, and slowly depart the area Wednesday morning. Isolated
  2 inch rainfall amounts will be possible, but most areas should
  see rainfall under a half inch north of I-72, and around an inch
  to the south.
- A stretch of dry weather returns Friday through at least early
  next week with temps returning to above normal (highs in the mid
  80s).
&&
.DISCUSSION...
Issued at 247 PM CDT Tue Sep 23 2025
Weak low pressure over eastern OK with an attendant warm frontal
feature extending across MO toward central IL is beginning to
spread showers into southwest portions of central IL this
afternoon, with high resolution model ensembles in good agreement
these showers will spread northeastward across most of central IL
this evening, with a few embedded thunderstorms as a few to
several hundred J/kg CAPE develops over the area. Deep layer shear
appears to be on the weak side for any sever storms, generally
under 30 kts. There appears to be a corridor where fairly
persistent rainfall could result in rainfall totals of an inch or
two overnight, as well as some spotty slow moving thunderstorms
that could produce localized two inch rainfall. This system should
slowly migrate eastward Wednesday morning, with precipitation
dissipating at least for a time. It still appears a frontal
boundary will be stalled out near I-70 Wednesday, with another
couple of shortwaves rotating around an upper level low stalled
out near the Great Lakes, set to affect portions of the region
through Thursday. This could produce some additional showers and
thunderstorms lingering into Thursday, mainly east of I-55. A
strong upper level ridge should build back over the region late
this week into early next week, providing dry conditions.
Temperatures will trend downward for Wednesday as the front
progresses south of the area, with highs mainly mid 70s.
Temperatures will trend back upward over the weekend, with highs
Friday around 80, followed by mid 80s.
37
&&
.AVIATION...  (For the 18z TAFs through 18z Wednesday Afternoon)
Issued at 1233 PM CDT Tue Sep 23 2025
A cold frontal boundary trailing across the area and a low
pressure system approaching from the southwest will provide a few
chances for showers and thunderstorms mainly before 12Z. First,
some isolated thunderstorms could develop over the area from
around 20Z-23Z with peak diurnal heating. Second, the system
approaching from the southwest will bring more widespread shower
activity with a few embedded thunderstorms spreading into the
KSPI area around 23Z and rapidly spreading northeast. The KPIA
area will likely be near the northwest extent of this system. VFR
conditions can be expected until around 06Z-08Z when lowering cigs
develop and MVFR to locally IFR develop, except isolated MVFR
cigs/vsbys in TSRA. Winds VRB to SW around 5 kts this afternoon,
becoming NE 6-12 kts by 06Z-10Z.
37
&&
.ILX WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$

NWS ILX Office Area Forecast Discussion