Marine Weather and Tide Forecast for Kewaunee, WI
 | Sunrise 6:08 AM Sunset 7:33 PM Moonrise 4:43 AM Moonset 4:29 PM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
LMZ542 Sturgeon Bay To Two Rivers Wi- 452 Pm Cdt Tue Apr 14 2026
.dense fog advisory in effect until 7 am cdt Wednesday - .
Late this afternoon - E wind 5 to 10 kts. Waves 2 ft or less. Areas of dense fog. A chance of showers and Thunderstorms.
Tonight - NE wind 5 to 10 kts backing N after midnight. Waves 2 ft or less. Areas of dense fog. Showers likely and a chance of Thunderstorms in the evening. A slight chance of showers after midnight.
Wednesday - NE wind 5 to 10 kts. Waves 2 ft or less. Areas of dense fog in the morning, then patchy fog in the afternoon. A chance of showers in the afternoon.
Wednesday night - NE wind 5 to 10 kts. Waves 2 ft or less. Patchy fog in the evening. Showers likely in the evening. A chance of Thunderstorms. A chance of showers after midnight.
Thursday - N wind 5 to 10 kts. Waves 2 ft or less. A chance of showers.
LMZ500
No data
No data
7 Day Forecast for Marine Location Near Kewaunee, WI
NEW! Add second zone forecast
FXUS63 KGRB 142105 AFDGRB
Area Forecast Discussion National Weather Service Green Bay WI 405 PM CDT Tue Apr 14 2026
Forecast discussion for routine afternoon forecast issuance
KEY MESSAGES
- There is a risk for strong to severe thunderstorms south of line roughly from Merrill to Carter to Amberg this afternoon and evening. Large hail and damaging winds are the main hazards.
There is also an isolated tornado threat mainly south of HWY 10.
- Thunderstorms will lead to localized heavy rainfall, greater than 1", this afternoon and evening across central and east- central WI. This will lead to additional flooding concerns in urban, low-lying, and poor drainage areas through tonight.
- Minor to moderate river flooding is ongoing or forecast to occur on several area rivers. Expect many rivers to rise this week due to additional rain and runoff from Upper Michigan, with the greatest impacts expected on the Menominee River, where some locations may see major flooding during the mid to late part of the week.
- Additional rounds of rain and thunderstorms are expected at times Wednesday through this weekend.
DISCUSSION
Issued at 405 PM CDT Tue Apr 14 2026
Severe Storm Potential Late This Afternoon/Evening...A surface boundary (warm front) was orientated west-east just on the southern edge of the forecast area this afternoon. This boundary will gradually lift north into the southern portion of the forecast area this afternoon due to persistent southwesterly flow, ushering in moist, unstable air. The atmosphere will be primed across the southern portion of the forecast area with steep mid- level lapse rates, 50-60 kts of deep-layer shear, and around 1000 to 2000 J/kg of MUCAPE, supporting the potential for severe thunderstorms with large hail and damaging winds being the main hazards. However, just along the southern portion of the forecast area, CAMs and current surface analysis indicate some surface- based CAPE of 1000 to 1500 J/kg, effective SRH of 100-200 m2/s2, and steep low-level lapse rates, favoring a tornado threat in addition to the large hail and damaging winds. After coordination with SPC and surrounding offices, a Tornado Watch was issued for Waushara, Winnebago, Calumet, and Manitowoc counties until 10 PM tonight (Tuesday). Depending on how far north the boundary lifts, the tornado threat could reach into the next northern tier of counties. PWATs of 1-1.25 inches are forecast with these storms, causing a risk of at least additional flooding in urban, low- lying, and poor drainage areas, and a risk of flash flooding, especially where ongoing flooding impacts from Monday evening's storms remain.
Possible Dense Fog Tonight...Following this evening's showers and thunderstorms, models indicate low-level moisture/stratus expanding into the area from the northeast. Given the low-level moisture and the ongoing low-level moisture over the area already, fog is likely going to occur. Models indicate visibilities may drop as low as 1/4 mile at times. A Dense Fog Advisory may be needed late tonight into Wednesday morning.
Rain and Thunderstorms Wednesday-Monday...A surface low is forecast to lift into the Upper Mississippi Valley Wednesday into Thursday, bringing another round of rain and possible thunderstorms. MUCAPE of 200-400 J/kg looks to stay confined to the southern portions of the forecast area leaving a marginal risk for severe storms. Although rainfall amounts with this system look less impressive, any additional rainfall will still add to the ongoing flooding risk.
A more dynamic trough is slated to impact the region late Friday into early Saturday, bringing additional widespread rainfall and storms. The northward extent of greater instability is somewhat uncertain with this system, impacting severe weather potential, but this will be something to watch in the coming days. Cooler air will trail behind this system, which may bring potential for snow across the far north on Saturday associated with the wrap-around moisture from the main low pressure system.
AVIATION
for 18Z TAF Issuance Issued at 109 PM CDT Tue Apr 14 2026
A mix of MVFR and IFR cigs prevailed across the region early this afternoon, with the exception of LIFR cigs and 1/4 mile vsbys at MTW. These conditions are expected to continue until around 00z Wed. Low stratus with LIFR cigs with fog of 1/2 mile or as low as 1/4 mile will then expand across the area after 00z Wed reaching all terminals. Anticipate these conditions to continue through early Wednesday morning before gradually improving by the afternoon.
Additionally, the next chances for showers and thunderstorms arrives around 23z at the central and east-central WI TAF sites.
Confidence is highest for thunderstorms at the east-central WI TAF sites between 23z Tue and 02z Wed, which are expressed with TEMPO groups. A brief period of LLWS is also anticipated at the east- central WI TAF sites during this time as well. Lower confidence for showers and thunderstorms at the central WI TAF sites, so used PROB30 groups. Some of the strongest storms could produce large hail and damaging wind gusts.
HYDROLOGY
Issued at 405 PM CDT Tue Apr 14 2026
Despite no precipitation falling from this morning through early this afternoon, several locations across east-central WI were still dealing with flooding impacts where a maximum of 4.5-5.5 inches of rainfall fell from Monday's storms along an axis from Stevens Point to Bonduel, with a more broad swath of 1-3" south of HWY 8. An additional 0.5-1" of rain is expected across east- central WI this afternoon/evening, which will only exacerbate flooding concerns. Runoff from snow melt in Upper Michigan is also still expected to bring moderate to possibly major flooding on the Menominee River, especially during the mid to late part of the week. If you live near a river or stream, keep a close eye on water levels this week and monitor the latest Flood Warnings from the National Weather Service in Green Bay.
GRB WATCHES/WARNINGS/ADVISORIES
Flood Watch through Wednesday morning for WIZ022-035>040-045- 048>050.
Area Forecast Discussion National Weather Service Green Bay WI 405 PM CDT Tue Apr 14 2026
Forecast discussion for routine afternoon forecast issuance
KEY MESSAGES
- There is a risk for strong to severe thunderstorms south of line roughly from Merrill to Carter to Amberg this afternoon and evening. Large hail and damaging winds are the main hazards.
There is also an isolated tornado threat mainly south of HWY 10.
- Thunderstorms will lead to localized heavy rainfall, greater than 1", this afternoon and evening across central and east- central WI. This will lead to additional flooding concerns in urban, low-lying, and poor drainage areas through tonight.
- Minor to moderate river flooding is ongoing or forecast to occur on several area rivers. Expect many rivers to rise this week due to additional rain and runoff from Upper Michigan, with the greatest impacts expected on the Menominee River, where some locations may see major flooding during the mid to late part of the week.
- Additional rounds of rain and thunderstorms are expected at times Wednesday through this weekend.
DISCUSSION
Issued at 405 PM CDT Tue Apr 14 2026
Severe Storm Potential Late This Afternoon/Evening...A surface boundary (warm front) was orientated west-east just on the southern edge of the forecast area this afternoon. This boundary will gradually lift north into the southern portion of the forecast area this afternoon due to persistent southwesterly flow, ushering in moist, unstable air. The atmosphere will be primed across the southern portion of the forecast area with steep mid- level lapse rates, 50-60 kts of deep-layer shear, and around 1000 to 2000 J/kg of MUCAPE, supporting the potential for severe thunderstorms with large hail and damaging winds being the main hazards. However, just along the southern portion of the forecast area, CAMs and current surface analysis indicate some surface- based CAPE of 1000 to 1500 J/kg, effective SRH of 100-200 m2/s2, and steep low-level lapse rates, favoring a tornado threat in addition to the large hail and damaging winds. After coordination with SPC and surrounding offices, a Tornado Watch was issued for Waushara, Winnebago, Calumet, and Manitowoc counties until 10 PM tonight (Tuesday). Depending on how far north the boundary lifts, the tornado threat could reach into the next northern tier of counties. PWATs of 1-1.25 inches are forecast with these storms, causing a risk of at least additional flooding in urban, low- lying, and poor drainage areas, and a risk of flash flooding, especially where ongoing flooding impacts from Monday evening's storms remain.
Possible Dense Fog Tonight...Following this evening's showers and thunderstorms, models indicate low-level moisture/stratus expanding into the area from the northeast. Given the low-level moisture and the ongoing low-level moisture over the area already, fog is likely going to occur. Models indicate visibilities may drop as low as 1/4 mile at times. A Dense Fog Advisory may be needed late tonight into Wednesday morning.
Rain and Thunderstorms Wednesday-Monday...A surface low is forecast to lift into the Upper Mississippi Valley Wednesday into Thursday, bringing another round of rain and possible thunderstorms. MUCAPE of 200-400 J/kg looks to stay confined to the southern portions of the forecast area leaving a marginal risk for severe storms. Although rainfall amounts with this system look less impressive, any additional rainfall will still add to the ongoing flooding risk.
A more dynamic trough is slated to impact the region late Friday into early Saturday, bringing additional widespread rainfall and storms. The northward extent of greater instability is somewhat uncertain with this system, impacting severe weather potential, but this will be something to watch in the coming days. Cooler air will trail behind this system, which may bring potential for snow across the far north on Saturday associated with the wrap-around moisture from the main low pressure system.
AVIATION
for 18Z TAF Issuance Issued at 109 PM CDT Tue Apr 14 2026
A mix of MVFR and IFR cigs prevailed across the region early this afternoon, with the exception of LIFR cigs and 1/4 mile vsbys at MTW. These conditions are expected to continue until around 00z Wed. Low stratus with LIFR cigs with fog of 1/2 mile or as low as 1/4 mile will then expand across the area after 00z Wed reaching all terminals. Anticipate these conditions to continue through early Wednesday morning before gradually improving by the afternoon.
Additionally, the next chances for showers and thunderstorms arrives around 23z at the central and east-central WI TAF sites.
Confidence is highest for thunderstorms at the east-central WI TAF sites between 23z Tue and 02z Wed, which are expressed with TEMPO groups. A brief period of LLWS is also anticipated at the east- central WI TAF sites during this time as well. Lower confidence for showers and thunderstorms at the central WI TAF sites, so used PROB30 groups. Some of the strongest storms could produce large hail and damaging wind gusts.
HYDROLOGY
Issued at 405 PM CDT Tue Apr 14 2026
Despite no precipitation falling from this morning through early this afternoon, several locations across east-central WI were still dealing with flooding impacts where a maximum of 4.5-5.5 inches of rainfall fell from Monday's storms along an axis from Stevens Point to Bonduel, with a more broad swath of 1-3" south of HWY 8. An additional 0.5-1" of rain is expected across east- central WI this afternoon/evening, which will only exacerbate flooding concerns. Runoff from snow melt in Upper Michigan is also still expected to bring moderate to possibly major flooding on the Menominee River, especially during the mid to late part of the week. If you live near a river or stream, keep a close eye on water levels this week and monitor the latest Flood Warnings from the National Weather Service in Green Bay.
GRB WATCHES/WARNINGS/ADVISORIES
Flood Watch through Wednesday morning for WIZ022-035>040-045- 048>050.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| KWNW3 - 9087069- Kewaunee, WI | 1 mi | 59 min | E 5.1G | 29.74 | ||||
| GBWW3 | 28 mi | 59 min | NNE 7G | 52°F | 29.73 | |||
| MN4 - 9087088 - Menominee, MI | 45 mi | 59 min | NNW 5.1G | 44°F | 41°F | 29.75 | 44°F |
Wind History for Kewaunee MET, WI
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Link to 1 hour of 5 minute data for KMTW
Terminal Aerodrome Forecast (TAF) for KMTW
Wind History Graph: MTW
(wind in knots)
GEOS Local Image of great lakes
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