Marine Weather and Tide Forecast for Two Rivers, WI
 | Sunrise 5:42 AM Sunset 8:11 PM Moonrise 10:39 PM Moonset 12:15 PM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
LMZ543 Expires:202608050400;;628840 Fzus53 Kgrb 042223 Nshgrb
nearshore marine forecast national weather service green bay wi 523 pm cdt Tue aug 4 2026
for waters within five nautical miles of shore on lake michigan
lmz541>543-050400- rock island passage to sturgeon bay wi- sturgeon bay to two rivers wi-two rivers to sheboygan wi- 523 pm cdt Tue aug 4 2026
.small craft advisory in effect until 10 pm cdt this evening - .
Late this afternoon - S wind 10 to 20 kts. Waves 3 to 5 ft. A chance of showers and Thunderstorms.
Tonight - SW wind 10 to 15 kts veering N 5 to 10 kts in the late evening and overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft after midnight. A chance of showers and Thunderstorms.
Wednesday - N wind 5 to 10 kts veering se early in the afternoon. Waves 1 to 3 ft. A chance of showers in the morning.
Wednesday night - SE wind 5 to 10 kts veering sw after midnight. Waves 2 ft or less. Partly cloudy.
Thursday - SW wind 5 to 10 kts backing S in the late morning and afternoon. Waves 2 ft or less. Mostly Sunny.
nearshore marine forecast national weather service green bay wi 523 pm cdt Tue aug 4 2026
for waters within five nautical miles of shore on lake michigan
lmz541>543-050400- rock island passage to sturgeon bay wi- sturgeon bay to two rivers wi-two rivers to sheboygan wi- 523 pm cdt Tue aug 4 2026
LMZ500
No data
No data
7 Day Forecast for Marine Location Near Two Rivers, WI
NEW! Add second zone forecast
FXUS63 KGRB 041750 AFDGRB
Area Forecast Discussion National Weather Service Green Bay WI 1250 PM CDT Tue Aug 4 2026
KEY MESSAGES
- A few non-severe storms (30-60%) may impact mainly east- central into northeast Wisconsin late this afternoon/evening.
- There are intermittent 30-50% chances for storms Friday through early next week, but confidence in timing and potential severity are low at this time.
DISCUSSION
Issued at 1250 PM CDT Tue Aug 4 2026
A cold front will pass southeast across the area this evening into early Wednesday. Ahead of the front, the HRRR surface-based CAPE reaches ~1000 J/kg across east-central Wisconsin, although synoptic forcing and deep layer shear are relatively modest.
Isolated to scattered storms may develop ahead of the front, but the severe weather risk will be quite low. Additional showers may persist north of the surface boundary overnight into Wednesday.
A shortwave trough will drag a boundary south towards the area on Friday with a 20-40% chance of storms. Over the weekend into early next week, the local area will likely reside on the northern periphery of a seasonably warm, moist and unstable environment.
Subtle shortwave troughs embedded in the seasonally strong mid-level westerly flow will interact with the low-level boundary and instability to produce rounds of showers and storms across the Midwest. However, predictability of storms at this range is low in this type of pattern. Some weather risk could evolve given the degree of flow aloft, but these trends will need to be evaluated in coming days as confidence increases with the degree of instability, timing of shortwaves, and boundary placement.
Otherwise, temperatures will trend seasonably warm late this week into the weekend. Some smoke aloft from wildfires may lead to hazy skies at times, but HRRR smoke model suggests low near surface smoke concentrations through Wednesday.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
Issued at 1250 PM CDT Tue Aug 4 2026
A cold front move southeast this afternoon and tonight with scattered thunderstorms most likely (40-60%) late this afternoon and evening across east-central Wisconsin. The greatest window for any storms was refined at KGRB, KATW and KMTW, but additional adjustments likely will be needed in subsequent updates. Showers may persist overnight into early Wednesday north of the front, but with the thunder threat lower.
Southwest winds will shift west/northwest in the wake of the front or become light overnight. With the light flow, areas of IFR/MFR stratus may develop overnight into Wednesday morning.
GRB WATCHES/WARNINGS/ADVISORIES
WI...Beach Hazards Statement from 2 PM this afternoon to 10 PM CDT this evening for WIZ022-040-050.
MARINE...Small Craft Advisory from 2 PM this afternoon to 10 PM CDT this evening for LMZ541>543.
Area Forecast Discussion National Weather Service Green Bay WI 1250 PM CDT Tue Aug 4 2026
KEY MESSAGES
- A few non-severe storms (30-60%) may impact mainly east- central into northeast Wisconsin late this afternoon/evening.
- There are intermittent 30-50% chances for storms Friday through early next week, but confidence in timing and potential severity are low at this time.
DISCUSSION
Issued at 1250 PM CDT Tue Aug 4 2026
A cold front will pass southeast across the area this evening into early Wednesday. Ahead of the front, the HRRR surface-based CAPE reaches ~1000 J/kg across east-central Wisconsin, although synoptic forcing and deep layer shear are relatively modest.
Isolated to scattered storms may develop ahead of the front, but the severe weather risk will be quite low. Additional showers may persist north of the surface boundary overnight into Wednesday.
A shortwave trough will drag a boundary south towards the area on Friday with a 20-40% chance of storms. Over the weekend into early next week, the local area will likely reside on the northern periphery of a seasonably warm, moist and unstable environment.
Subtle shortwave troughs embedded in the seasonally strong mid-level westerly flow will interact with the low-level boundary and instability to produce rounds of showers and storms across the Midwest. However, predictability of storms at this range is low in this type of pattern. Some weather risk could evolve given the degree of flow aloft, but these trends will need to be evaluated in coming days as confidence increases with the degree of instability, timing of shortwaves, and boundary placement.
Otherwise, temperatures will trend seasonably warm late this week into the weekend. Some smoke aloft from wildfires may lead to hazy skies at times, but HRRR smoke model suggests low near surface smoke concentrations through Wednesday.
AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/
Issued at 1250 PM CDT Tue Aug 4 2026
A cold front move southeast this afternoon and tonight with scattered thunderstorms most likely (40-60%) late this afternoon and evening across east-central Wisconsin. The greatest window for any storms was refined at KGRB, KATW and KMTW, but additional adjustments likely will be needed in subsequent updates. Showers may persist overnight into early Wednesday north of the front, but with the thunder threat lower.
Southwest winds will shift west/northwest in the wake of the front or become light overnight. With the light flow, areas of IFR/MFR stratus may develop overnight into Wednesday morning.
GRB WATCHES/WARNINGS/ADVISORIES
WI...Beach Hazards Statement from 2 PM this afternoon to 10 PM CDT this evening for WIZ022-040-050.
MARINE...Small Craft Advisory from 2 PM this afternoon to 10 PM CDT this evening for LMZ541>543.
Wind History for Kewaunee MET, WI
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Link to 5 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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