Marine Weather and Tide Forecast for Manitowoc, WI

DISCUSSION
Issued at 453 AM CDT Tue Apr 29 2025

Precip Today...Following the overnight rain and thunderstorms, most places were quiet as of 09Z/Tue with only a few very isolated rain showers or sprinkles. The main feature to watch is the mix of rain and snow occurring in far northwest Wisconsin and northeast MN in association with the wrap around from the surface low and a mid- level shortwave. As these features track east over the next few hours, this will bring a low to medium chance (20-50%) of precip to northern and north- central through late morning (~6-11AM). Temperatures are warmer here, so precip will mostly be rain, but cannot rule out a few snowflakes in mainly Vilas Co. No snow accumulation or impacts are expected. Cannot completely rule out any thunder with this morning wave as some models show a tiny bit of instability, but any lightning activity would be isolated and short-lived. No severe weather is expected.

Precipitation and clouds clear out this afternoon as high pressure builds in, leading to ample sunshine for the area.
However, a colder airmass will be in place, so temps will be cooler today with highs ranging from the middle 40s in Vilas County to the upper 50s to around 60 degrees across the Fox Valley and east- central Wisconsin.

Winds Today...Gusty W to NW winds are also expected in the wake of the cold front, with gusts from 20-35 mph. Winds will be strongest in east-central WI, along east of the Fox Valley, where the chance for wind gusts of 35+ mph is 20-40%.

Cool Wednesday Morning...High pressure and upper ridging will keep conditions dry through Wednesday. The clear skies and light winds tonight will bring somewhat chilly temps for late April, with lows falling to the upper 20s and low 30s.

Next System...Another system impacts the area Wednesday night into Friday morning which will bring on/off precip chances. As the main low is currently expected to track south of the forecast area, anticipate being on the cooler side of the system with little to no instability to work with. So at the moment, thunder chances are low and any severe weather looks unlikely.

Spring-like Weekend...Large high pressure builds in for the weekend and early next week bringing very spring-like conditions with partly to mostly sunny skies, relatively light winds, and a warming trend. The chance for readings at or above 70 degrees on Sunday and Monday ranges from about 50-70% for most locations away from the lakeshore.

AVIATION
for 18Z TAF Issuance Issued at 1203 PM CDT Tue Apr 29 2025

MVFR CIGS across northern Wisconsin will rise into the VFR category by mid afternoon. Skies will clear later this afternoon or early this evening and then remain clear through the overnight hours into Wednesday before high clouds return later in the day. Gusty northwest winds up to 30 knots should diminish gradually this afternoon. Wind are expected to veer to the northeast/east tonight then becoming southeast on Wednesday. The next chance of rain is expected on Wednesday night, with the highest chances across east- central and northeast Wisconsin.

GRB WATCHES/WARNINGS/ADVISORIES
None.