Hartland, Wisconsin Weather Forecast Discussion

206
FXUS63 KMKX 140934
AFDMKX
Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
434 AM CDT Sun Sep 14 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 are forecast over much of the region into this morning,
  with the worst of it towards eastern and central WI.
&&
.SHORT TERM...
Issued 416 AM CDT Sun Sep 14 2025
Today through Tonight:
Areas of dense fog will persist until around the 9AM to 10AM
hour as it lifts and mixes. Otherwise high pressure will
continue to contribute to dry, quiet conditions today into
tonight. Highs will be in the mid 80s inland, and in the upper
70s near the lakeshore owing to light east winds off of the
lake.
CMiller
&&
.LONG TERM...
Issued 416 AM CDT Sun Sep 14 2025
Monday through Saturday:
The high amplitude ridge in the jet stream remains dominant over
the region through mid week, gradually shifting from neutral to
positive tilt, but maintaining it`s amplitude. Corresponding
surface high pressure over southern Quebec Canada remains dominant
over the Great Lakes Region, continuing to favor dry weather and
allowing for weak synoptic wind flow at the surface (veering from
east to south Monday through Wednesday) and lake breeze
circulations. Away from said lake breeze, inland daytime high
temperatures reach the mid to upper 80s Monday through Wednesday.
Precip chances remain very low, with weak surface pressure
troughing and warm air advection managing to produce some slight
rain chances for far western WI, likely holding short of our
entire CWA though.
The next mentionable chance of precip for our region would be the
second half of this week (Wednesday night and onwards, 25-50%
rain chances each day) as Quebec high pressure dissipates and a
broad area of low pressure drifts inbound from the Central Great
Plains. Though surface winds are likely to remain out of the south
on Thursday, cloud cover associated with this system is forecast
to hold daytime high temps several degrees cooler. Late this week,
strong high pressure approaches James Bay Canada, likely forcing
a backdoor cold front through our region, with continued rain
chances and falling temperatures.
Sheppard
&&
.AVIATION...
Issued 417 AM CDT Sun Sep 14 2025
Morning fog will be dense in spots, with visibility drops down
to 1/4SM. Fog is expected to dissipate after dawn. Skies should
then clear by 18Z with VFR conditions expected amid light east
winds.
CMiller
&&
.MARINE...
Issued 417 AM CDT Sun Sep 14 2025
Low pressure over the northern Great Plains will remain in
place through early next week. Light easterly winds are expected
during this time over Lake Michigan. Areas of fog, possibly
dense, may develop at times.
A Marine Dense Fog Advisory is in effect for all open waters north
of a Port Washington WI to Whitehall MI line until mid Sunday
morning. The worst of the fog is expected towards the western side
of the lake in the Advisory area.
CMiller
&&
.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Dense Fog Advisory...WIZ051-WIZ052-WIZ058-WIZ059-WIZ060-WIZ065-
     WIZ066-WIZ070-WIZ071-WIZ072 until 10 AM Sunday.
LM...Dense Fog Advisory...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565-
     LMZ567-LMZ643-LMZ669-LMZ868-LMZ870 until 10 AM Sunday.
&&
$$
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NWS MKX Office Area Forecast Discussion