Whitewater, WI 53190 Weather

This Hazardous Weather Outlook is for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin.

Day one: Today and Tonight

A few thunderstorms are possible late tonight into early Thursday morning.

Days two through seven: Thursday through Monday

Thunderstorms will remain possible through Thursday morning.

Spotter information statement

Spotter activation will not be needed.

Key messages

- Warm and dry today, a bit breezy.

- 60-80 percent chance for rain showers north and west of the MKE metro area tnt with lesser chances for MKE and south. Isolated thunderstorms possible.

- Chances for rain continue each day through the weekend into early next week.

Update

Issued 637 AM CDT Wed Oct 28 2026

The forecast is on track for a return of 70 degree temps today as a wave of low pressure tracks from the central high plains to the Upper MS River Valley. The low will track northeast into Ontario tnt and deepen while its cold frontal passage will occur over srn WI from 10-16Z Thu. Numerous showers are expected but with lesser chances over far se WI as the dynamics stay well to the north. A few thunderstorms may occur as tall, skinny, elevated CAPE is noted on fcst soundings. Subsidence and drying will then take hold for Thu with clearing skies. High temps in the 60s are forecast.

Gehring

Short term

Issued 1237 AM CDT Tue Oct 27 2026

Today through Thursday night:

Some localized patchy fog was able to develop late this evening despite the cloud cover. Temperatures were able to fall to the dewpoints or very close to (dewpoint depressions around 2 or less) under the diminishing winds. Winds are expected to remain light and temperatures should continue to fall as skies are clearing. Fog should stick to low lying areas and fields. If temperatures plummet under the clear skies the fog could potentially become more widespread and locally dense.

The upper level DIV and PVA that brought us the small chance for showers early this evening will continue to move northeast toward the Hudson Bay through today. As the trough pivots and moves northeast the upper level jet should increase at the sfc the low pressure system in Ontario should also strengthen which will tighten the pressure gradient across the Great Lakes Region. This will create some breezy conditions across the state. A few meso models are showing a bit of a weaker rain signal. The few models that are doing this are slower to bring in the mid level moisture and have a narrower moisture profile. This has effected the rain amounts with a cold front that is expected to pass through late Wednesday into Thursday. Despite this not expecting a ton of change here even if the moisture is a bit lacking this wasn't expected a huge rain producing event. The biggest change would be that rain is more along a scattered line. Either way there is still elevated CAPE in the area as well which will bring the chances for a few rumbles of thunder.

The front should clear Wisconsin during the morning hours with high pressure moving in behind it. Skies should quickly clear behind the front and some CAA will bring some cooler temps.

Patterson

Long term

Issued 1237 AM CDT Tue Oct 27 2026

Wednesday through Monday:

High pressure will pull to the east of Wisconsin Friday which should swing winds back around to the east to southeast. This will bring back some WAA to the state. There is a bit of uncertainty on if the the mid level WAA will be enough to get some rain to develop. The forcing doesn't look all that great and moisture will still be lacking under the easterly winds. Conditions for rain starts to improve a bit heading to Friday night into Saturday as the trough advects northeast into the Central Plains and western Great Lakes. This track is still uncertain however. The GFS looks to be the furtherest north, EURO the furthest south with the CAN and NAM being some where in between. The NAM by far seems to be the slowest with this system at the edge of its forecast range. All these difference shift around the axis of rain and the strength of the system as a whole. At least we can bank on some consistency from the GFS as it remains the rainiest option for southern Wisconsin. Kept to the average among guidance which keeps POPS low around 15-30%.

Looking further ahead to into early next week, guidance is hinting at a larger and stronger low pressure system moving into the central CONUS. There is a bit of discrepancies as one would expect with the biggest caveats being how well the upper level flow merges together with a northern and southern track trough. The evolution of this system differs wildly from model to model, but this looks to kick off a more active period regardless.

Patterson

Aviation

Issued 637 AM CDT Wed Oct 28 2026

VFR conditions today and early this evening followed by numerous rain showers and isolated thunderstorms late evening into the overnight. A narrow band of MVFR Cigs may then develop along a southeastward moving cold front from the early morning into the mid to late morning on Thu.

Gehring

Marine

Issued 637 AM CDT Wed Oct 28 2026

High pressure of 30.4 inches over New England will move offshore later today, while weak low pressure over the central high plains tracks to western Lake Superior for this evening. The low will then deepen to 29.5 inches as it tracks northeast across Ontario into Quebec through Thursday. Modest south winds today will become breezy tonight with gusts approaching gale force over far northern Lake Michigan. Winds then become southwesterly and come around to northwesterly with the passage of a cold front Thursday morning. Winds then quickly slow behind the front Thursday afternoon and evening as high pressure of 30.2 inches works in from the central plains.

Gehring

Watches, warnings and advisories

WI: None. LM: Small Craft Advisory: LMZ643: 7 PM Wednesday to 7 AM Thursday.