Clare, Illinois Weather Forecast Discussion

680
FXUS63 KLOT 292309
AFDLOT
Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
609 PM CDT Mon Sep 29 2025
.KEY MESSAGES...
- Dry and unseasonably warm daytime conditions through next
  weekend.
&&
.DISCUSSION...
Issued at 136 PM CDT Mon Sep 29 2025
Blue skies abound across much of the forecast area this
afternoon. The exception is southeast of I-57 where weak
instability has allowed for some mid level cumulus to
develop. With an upper level ridge remaining firmly in place
through much of the week, unseasonably warm and dry conditions
are expected to prevail. Temperatures can be expected in the 80s
inland, but persistent east-northeast flow will help keep the
lake shoreline in the mid to upper 70s tomorrow through
Thursday. As winds turn back to the south-southwest on Friday,
temperatures will once again rise into the upper 80s, with low
to mid 80s near the lake setting up a warm and dry weekend.
Returning momentarily to tonight: clear skies, light onshore
winds and a stout inversion are expected overnight. Localized
patchy shallow fog may crop up in traditional low-lying areas.
For now, the best chances look to be to the north in Wisconsin,
so the only formal mention patchy fog in the forecast is in Lake
(IL) and McHenry Counties.
The upper level ridge is projected to slowly move east this
weekend with an upper level trough moving toward the western
Great Lakes Saturday night into Sunday. There is still some
discrepancies between models in the exact track of the trough
into early next week, but many are showing a more northward
track through Canada. There was already low confidence in the
chances for precipitation early next week in the last forecast
package, and it seems that models are trending lower with PoPs
more focused north of Illinois. Any chances for meaningful
precipitation seems low which could further exacerbate drought
conditions, at least in the foreseeable future.
DK
&&
.AVIATION /00Z TAFS THROUGH 06Z WEDNESDAY/...
Issued at 609 PM CDT Mon Sep 29 2025
There are again no significant concerns through the period.
Patchy shallow fog may develop in portions of far northeast
Illinois overnight. While some guidance has been consistently
depicting accompanying low CIGs with the shallow fog, even into
ORD and MDW, the chance of occurrence seems very low due to the
very dry conditions. Current easterly winds in the wake of the
lake breeze will become light north-northeast to VRB/calm at
times overnight and then northeast around 10 kt by mid to late
Tuesday morning. Northeast winds will likely remain in the 5-10
kt range through Tuesday night, especially near the lake.
Castro
&&
.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.
&&
$$
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NWS LOT Office Area Forecast Discussion