FXUS63 KLOT 241825

AFDLOT



Area Forecast Discussion

National Weather Service Chicago/Romeoville, IL

125 PM CDT Fri Oct 24 2025



.KEY MESSAGES...



- Seasonable temperatures will prevail. 



- Chances for rain through the next 7 days are 30 percent or

  lower and any given location. 



&&



.DISCUSSION...

Issued at 125 PM CDT Fri Oct 24 2025



Through next Friday: 



Another cold night is in store tonight on the back edge of the 

departing ridge. A gradual increase in mid to upper-level cloud 

cover, especially south, will limit nocturnal cooling to some 

extent, but overnight lows should still have no problem falling

into the 30s (except in the core of Chicago where lows in the

lower 40s are expected). With most of the area experiencing a

widespread freeze this morning, will forgo the issuance of any

frost/freeze headlines for the remainder of the fall season. 



A blocked upper-level "high over low" pattern across the 

central CONUS will drive much of the weather for our area this 

weekend into early next week. The main upper-level low currently

over the Four Corners region will gradually draw in Gulf 

moisture across the southern Plains and into the mid to lower 

Mississippi River Valley during this time. Meanwhile, a weak 

wave shifting southeast over the western Great Lakes will clip 

the area to the northeast on Saturday. Some mid-level moisture 

originating from the upper-level low is expected to interact 

with the wave to the north. However, a stout surface high 

pressure system centered over southeastern Canada will provide a

steady feed of dry low-level air, likely chewing up any 

raindrops as they fall toward the ground. In all, will go with a

10-15% chance of measurable precip at any given location 

keeping in mind most areas will stay dry. Thick cloud cover will

hold high temperatures toward seasonable values and in the 50s.



Current indications are that the upper-level low will remain 

well south of the area Sunday and Monday, with the northern 

periphery of the system bringing some isolated showers near

US-24 during this period. But again, a vast majority of the 

area is favored to remain dry for much of the period.



A trough attempting to undercut the northern ridge from the 

blocking pattern is progged to send a wave into the Ohio River 

Valley and amplify the upper-level low over the central 

Appalachians early next week. The expansion of the deep low 

combined with a trailing trough on the western flank of the low 

supports the inclusion of at least some scattered showers in the

forecast for Tuesday into Wednesday. However, the continued feed

of dry air from the Canadian high may relegate any measurable

precipitation south of our area. Seasonable temperatures will 

prevail. 



Kluber/Borchardt



&&



.AVIATION /18Z TAFS THROUGH 00Z SUNDAY/...

Issued at 1213 PM CDT Fri Oct 24 2025



There are no aviation weather concerns for the 18Z TAF period.



NW winds are occasionally flipping to NE while moving at around

or below 5 kt. This may continue until an easterly direction 

takes hold late in the afternoon. Then expect SE to E winds 

largely below 10 kt through the remainder of the period. VFR is 

anticipated throughout the period.



Doom



&&



.LOT WATCHES/WARNINGS/ADVISORIES...

IL...None.

IN...None.

LM...None.



&&



$$



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