Spring Valley, Illinois Weather Forecast Discussion

792
FXUS63 KDVN 281915
AFDDVN
Area Forecast Discussion
National Weather Service Quad Cities IA IL
215 PM CDT Sun Sep 28 2025
.KEY MESSAGES...
- The warmer than normal conditions will continue through the
  week with only a slight cool down toward the weekend.
- Dry conditions are expected through Saturday. While the models
  suggest rain next weekend, there is an 80% probability that
  dry conditions will continue.
&&
.SHORT TERM /THROUGH MONDAY/...
Issued at 215 PM CDT Sun Sep 28 2025
The front has stalled south of I-80 and will slowly wash out through
sunrise Monday. The dry air will result in larger than normal
diurnal temperature swings.
Right now it appears no records will be broken on Monday but one
location may be close. Refer to the climate section for records
highs.
&&
.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
Issued at 215 PM CDT Sun Sep 28 2025
Monday night through Saturday
Assessment...A near certainty (>99%)of above normal temperatures
and no rain.
The thermal ridge remains in place across the area through mid-week
before slowly retrograding into the Plains. Record highs are not
expected for Tuesday but have been included in the climate section.
The main weather players this week will be the developing blocking
pattern on the east coast with strong high pressure from New England
into the mid-Atlantic states with tropical systems Humberto and
Imelda off the southeast coast. Until a developing trof forecast by
the global models develops on the east coast to push Humberto and
Imelda out to sea, weather systems across the CONUS will slow to a
crawl. The persistent dry air over the area will also result in cool
nights and warm days.
Saturday night and Sunday
Assessment...Very high (>90%) confidence on warmer than normal
temperatures continuing. Very low (

NWS DVN Office Area Forecast Discussion