textproduct: Milwaukee/Sullivan

KEY MESSAGES

- Widespread showers tonight with clearing toward morning.

- Another round of showers with a few storms (60-90+ percent) is forecast Thursday night.

- An active weather pattern returns late this weekend into next week. Warm and humid conditions and more showers and storms are expected.

SHORT TERM

Issued 1150 PM CDT Wed Apr 8 2026

Today through Saturday:

Two distinct sw-ne bands of showers are prevalent over srn WI. The initial band over far se WI is associated with warm, moist advection in the low to mid level thermal ridge. The second band from sw WI to the Fond du Lac area is associated with sfc-850 mb frontogenesis. The cold front and rainfall will move esewd through the early morning ending at MSN around 07Z and MKE around 10Z.

Weak sfc ridging and a wly sfc flow can be expected for Thu with cooler temps than Wed, but still on the mild side. A wave of low pressure supported by a weak shortwave trough will then track from the central Great Plains into far srn lower MI Thu nt. PWATs of 0.75-1.00 inches will shift back north into the region. Well organized 850-700 mb frontogenesis and the nose of a low level jet near the IL border will support widespread showers and a few rumbles of thunder during this time. 0.50-0.90 inches of rain are forecast along and south of a line from Mineral Point to Madison to Port Washington.

High pressure will then track from ern SD to the Upper MS River Valley on Fri, then across srn WI Fri nt. The high will then reach the Mid Atlantic States around 00Z Sun. Pleasant wx will prevail with high temps Fri-Sat in the middle to upper 50s well inland, with upper 40s at the Lake MI shoreline. The onset of low to mid level warm, moist advection will bring 20-30 percent chances for showers Sat afternoon over south central WI.

Gehring

LONG TERM

Issued 1150 PM CDT Wed Apr 8 2026

Saturday night through Wednesday:

This period will see a pattern change to swly flow aloft with low pressure areas developing over the high plains and tracking to the north or over srn WI. Relatively warm and humid air will arrive for Sun-Tue with repeated rounds of showers and storms from Sat nt-Tue. Showers may linger into Wed along with somewhat cooler temps. Will be monitoring rivers for a possible return of some flooding to some degree.

Gehring

AVIATION

Issued 1150 PM CDT Wed Apr 8 2026

LLWS will end from nw to se across srn WI during the early morning hours as a swly 50 kt jet leaves the region. Widespread showers will move across srn WI early this morning. A few hours or so of rainfall is expected at any one location with a brief period of MVFR Vsbys or Cigs possible. Clearing skies and much lighter winds will then take hold mostly before sunrise and continue through the day. However, widespread rainfall will quickly return Thu evening into the overnight. MVFR Cigs and Vsbys will develop with the rainfall including areas of Cigs below 1 kft over far srn WI.

Gehring

MARINE

Issued 1150 PM CDT Wed Apr 8 2026

Low pressure around 29.7 inches just north of Lake Superior will continue to James Bay by Thursday afternoon. This will result in gales ending during the early morning hours of Thu over the northern three quarters of the lake. A Small Craft Advisory from Sheboygan to Winthrop Harbor will also end at 4 AM CDT as winds and waves diminish.

Much lighter westerly winds are then expected Thursday in the wake of a cold front. Light and variable winds will prevail Friday into Saturday, until breezy southerly winds return late in the weekend.

Gehring

MKX WATCHES/WARNINGS/ADVISORIES

WI...None. LM...Gale Warning...LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565- LMZ567-LMZ669-LMZ671-LMZ673-LMZ675-LMZ868-LMZ870-LMZ872- LMZ874-LMZ876 until 4 AM Thursday.

Small Craft Advisory...LMZ643-LMZ644-LMZ645-LMZ646 until 4 AM Thursday.