Janesville, Wisconsin 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

894
FXUS63 KMKX 240339
AFDMKX

Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
939 PM CST Sat Nov 23 2024

.KEY MESSAGES...

- Largely quiet weather with near normal temperatures through
  the weekend

- Rain chances return to the area Sunday night into Monday.
  Uncertainty with precipitation chances increases mid next week
  and beyond.

- Colder weather is expected to settle into the area following
  the system Monday/Monday night

&&

.UPDATE...
Issued 939 PM CST Sat Nov 23 2024

A deck of low clouds is hovering just to the south of the WI/IL
border, with areas of fog (visibility around 5 miles) reported
within the low cloud deck. However, this deck is moving quite
slowly northward, so chances are minimal for the next few
hours. That being said, reduced visibilities are possible going
into the early morning hours on Sunday. A few sprinkles remain
possible along a band of upper level frontogenesis in central
Wisconsin through late tonight, but otherwise dry conditions
are expected. Expect lows in the lower 30s.

MH

&&

.SHORT TERM...
Issued 402 AM CST Sat Nov 23 2024

Today through Sunday:

Quiet weather will continue today through tonight as high
pressure moves through the area. Mostly cloudy skies are likely
to continue, though high temps will still be near normal today.
The clouds will keeps temps a few degrees above normal again
tonight.

Low pressure will approach Sunday, moving through far southern
Wisconsin or just to the south of the state Sunday night. Kept
precip chances on the lower end for now given weak lift and
limited moisture. Looks mainly like sprinkles or drizzle would
be the best chance for precip at this time.

DDV

&&

.LONG TERM...
Issued 402 AM CST Sat Nov 23 2024

Sunday night through Friday:

Precip chances are little higher on Monday (20-40%) as the main
trough and cold front swing through. The colder air should
arrive largely after the deeper moisture exits, so precip should
be mainly in the form of rain.

Below normal temps will settle into the area for mid-week. High
pressure is expected to bring dry weather Tuesday, with a
shortwave possibly bringing light snow chances later Wednesday
into Wednesday night.

Another cold front is expected to move through by later in the
day Thursday, bringing even colder conditions to southern
Wisconsin Friday into the weekend.

DDV

&&

.AVIATION...
Issued 939 PM CST Sat Nov 23 2024

Main question through tonight regards the 800 to 1300 ft cloud
deck with areas of fog around 5 SM just to the south of the
Wisconsin and Illinois border. Modeling has consistently
indicated this deck moving northward associated with warm air
advection in the low levels, but so far the deck has remained
nearly stationary. Still anticipating movement northward into
JVL/MSN/MKE/ENW, but have adjusted TAFs to see deteriorating
conditions after midnight and into Sunday morning. Low clouds
will scatter out after sunrise on Sunday, with the next round of
low ceilings moving in Sunday night as low pressure lifts
through the southern Great Lakes region.

Light and variable to calm winds are expected through tonight,
shifting to become southeasterly and becoming steady into
Sunday. Light and variable winds are expected again Sunday night
as low pressure moves overhead.

MH

&&

.MARINE...
Issued 402 AM CST Sat Nov 23 2024

High pressure will move through the area today into tonight,
bringing lighter winds to Lake Michigan. Southeast winds will
then pick up on Sunday ahead of an approaching low, with breezy
northwest winds then expected later Monday into Tuesday behind
the low and an associated cold front. A Small Craft Advisory may
be needed for this period. Lighter winds are expected to return
to the area Wednesday under weak high pressure.

DDV

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...None.
LM...None.
&&

$$

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