Walworth, Wisconsin Weather Forecast Discussion

923
FXUS63 KMKX 131904
AFDMKX
Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
204 PM CDT Sat Sep 13 2025
.KEY MESSAGES...
- Above normal temps and humidity this weekend into next week.
  Daily thunderstorm chances return for the 2nd half of the new
  week.
- Areas of fog over south central and southwest WI is forecast
  late tonight into Sunday morning.
&&
.SHORT TERM...
Issued 204 PM CDT Sat Sep 13 2025
Tonight through Monday night:
The low stratus has been slow to mix out over east central WI
but it is still making progress. More low stratus and fog may
develop late tnt, but would likely be most concentrated from
south central into southwest WI as slightly drier air on ely
winds will move into ern WI. This drier air is in response to
large surface high pressure moving from Ontario to srn Quebec
through Monday night, while the narrow upper ridge axis to the
west will shift over WI and Lake MI for tomorrow into Monday.
Warm and humid conditions are expected but no precipitation into
early next week.
Gehring
&&
.LONG TERM...
Issued 204 PM CDT Sat Sep 13 2025
Tuesday through Saturday:
The narrow upper ridge axis will weaken and roll over into the
Lower Great Lakes from Lake Huron and Lower MI for this period.
A mean upper trough comprised of many vorticity maximums will
initially be over the nrn and central Great Plains but will
consolidate into a trough passage over srn WI late in the week.
Thus Wed nt to the end of the week will see a return of
thunderstorm chances each day and very humid conditions.
Gehring
&&
.AVIATION...
Issued 204 PM CDT Sat Sep 13 2025
Areas of Cigs of 1000-1900 feet north of Milwaukee early this
afternoon will dissipate later this afternoon. Late tnt, more
areas of low stratus and fog will develop and linger into Sun
AM. This would include pockets of Cigs below 1 kft and Vsbys to
1/2SM FG and may concentrate more over south central and
southwest WI. The low stratus and fog will then burn off by late
Sun AM.
Gehring
&&
.MARINE...
Issued 204 PM CDT Sat Sep 13 2025
Low pressure around 29.7 inches over the northern Great Plains
will remain in place through early next week, while large high
pressure of 30.3 inches moves from Ontario to southern Quebec,
Canada. This will yield mean light to modest easterly winds
into early next week. Areas of fog, possibly dense, may develop
late tonight into Sunday morning over the northern one third of
the lake.
Gehring
&&
.MKX WATCHES/WARNINGS/ADVISORIES...
WI...None.
LM...None.
&&
$$
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NWS MKX Office Area Forecast Discussion