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Marine Weather and Tide Forecast for Ashland, WI

April 24, 2025 6:46 PM CDT (23:46 UTC)
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Sunrise 6:02 AM   Sunset 8:10 PM
Moonrise 3:32 AM   Moonset 3:17 PM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
   
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NOTE: Zones were updated 3/20/2025
LSZ121 206 Pm Cdt Mon Sep 16 2024

.an area of Thunderstorms over the nearshore waters of western lake superior - .
the areas affected include - . Chequamegon bay-bayfield to oak point wi - . Outer apostle islands beyond 5 nm from mainland - . Port wing to sand island wi - . Sand island to bayfield wi - .
at 205 pm cdt, doppler radar indicated an area of Thunderstorms, capable of producing winds to around 30 knots and frequent cloud to water lightning. This area of Thunderstorms was located along a line extending from near raspberry island to near herbster to 14 nm south of port wing harbor. The area of Thunderstorms were nearly stationary.
locations impacted include - . Ironwood island, basswood island, sand island, stockton island, devils island, cat island, manitou island, north twin island, herbster, meyers beach, york island, eagle island, apostle islands national lake shore, la pointe, rocky island, raspberry island, oak island, siskwit bay, apostle island sea caves, and south twin island.
precautionary/preparedness actions - .
mariners can expect gusty winds up to 33 knots, locally higher waves, lightning strikes, and heavy downpours. Boaters should seek safe harbor immediately until these storms pass.
&&
lat - .lon 4677 9092 4687 9080 4690 9080 4694 9086 4692 9096 4683 9111 4682 9118 4683 9122 4681 9129 4686 9124 4711 9071 4703 9045 4683 9070 4671 9089
LSZ100
No data

7 Day Forecast for Marine Location Near Ashland, WI
   
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Area Discussion for Duluth, MN
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FXUS63 KDLH 242339 AFDDLH

Area Forecast Discussion National Weather Service Duluth MN 639 PM CDT Thu Apr 24 2025

KEY MESSAGES

- Rain showers are expected tonight into Friday morning over northwest Wisconsin. Little to no precipitation will occur over northeast Minnesota over the same time period.

- Dry conditions are expected Friday afternoon into Saturday.
Near- critical fire weather conditions may be possible due to low relative humidity on Saturday.

- Rain chances arrive on Sunday and continue into Monday. There is a 15% chance for strong to severe thunderstorms on Monday, for areas along and south of US-2.

DISCUSSION
Issued at 308 PM CDT Thu Apr 24 2025

Fairly benign conditions have been observed across the CWA early this afternoon with varying amounts of cloud cover. Clouds have been advecting in from the south this afternoon ahead of an approaching shortwave trough. In addition to the shortwave approaching from southern Manitoba, low pressure will continue propagating eastward through the mid-Mississippi valley tonight into Friday morning. An area of light rain that has already developed within the baroclinic zone ahead of the shortwave trough axis will advect north into northwest WI late this afternoon into tonight. Total QPF from the system tonight into Friday will be around 0.5" or less.

Expect rain to come to an end across the CWA by Friday afternoon as the axis of the shortwave pivots through. Dry and mostly sunny conditions are expected Friday afternoon into Saturday as high pressure builds over the central CONUS. Model soundings from CAMs and the GFS show that a substantial dry layer will likely develop over the area on Saturday. With the potential for this dry air to mix to the surface, near-critical fire weather conditions may be a concern for Saturday as min RH drops to around 25%. Fortunately, fire weather concerns are somewhat mitigated by the relatively light winds that are expected under the high pressure.

Attention turns towards another active period of weather Sunday into Monday as a cutoff low over the Great Basin region rejoins the jet stream on Sunday and propagates towards the Midwest. Sunday will see rain shower chances arrive into the area as southerly flow provides strong WAA and ample moisture advection to the CWA This initial round of precipitation on Sunday will most likely be rain with the potential for isolated thunderstorms.

Thunderstorm chances ramp up late Sunday into Monday as steeper mid- level lapse rates in excess of 8 degC/km move into the CWA Moisture advection into the area will continue to be favorable, with PWAT by 12z Monday being as high as 1-1.4" (around the 97th percentile of NAEFS climatology). Expect this strong Gulf moisture advection to continue through the afternoon with high temps in the afternoon reaching the low 70s for the southern half of the CWA These warm temps combined with dewpoints reaching the low 60s and steep mid- level lapse rates will potentially increase MUCAPE in excess of 1000 J/kg for the southern half of the CWA This moderately favorable instability environment will occur in conjunction with strong 0-6km bulk shear of 50+ knots. At this time there is a fair amount of uncertainty regarding how far north the instability can reach and whether or not a sizable cap appearing in model soundings in the low-levels can be overcome. GEFS and EPS ensemble MSLP centers show a decent amount of spatial spread, which will have large implications on the placement of highest instability and the northward extent of possible severe convection. The Day 5 convective outlook from SPC still reflects a 15% chance for severe thunderstorms for areas along and south of US-2 on Monday. This will be a day to closely monitor as we head through the weekend and forecast confidence increases.

AVIATION /00Z TAFS THROUGH 00Z SATURDAY/
Issued at 639 PM CDT Thu Apr 24 2025

VFR covered the Northland early this evening with area radars showing widespread rain over southern Minnesota northeast into northern Wisconsin with some lighter rain/sprinkles further west over central to parts of northern Minnesota. Rain will be most widespread over northwest Wisconsin tonight tapering off to the west and north. Little if any rain will occur over far northern Minnesota. Ceilings will lower to MVFR over northwest Wisconsin and far eastern Minnesota overnight then they will rise west to east Friday. There are some indications that fog will develop tonight, including over far northern Minnesota. The clouds may limit how dense and widespread the clouds become. For now, we kept visibilities at MVFR at KINL.

MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/
Issued at 308 PM CDT Thu Apr 24 2025

Light northeast winds will continue through the afternoon today.
Winds will generally maintain this direction through Friday night into Saturday morning with speeds of 5 to 10 kts across western Lake Superior. There will be some light rain along the South Shore zones tonight that will be exiting Friday morning. The next chance for hazardous conditions for small vessels won't arrive until Monday into Tuesday as winds increase along with chances for showers and thunderstorms.

For the open water discussion, refer to the NWS Marquette Area Forecast Discussion at weather.gov/mqt.

DLH WATCHES/WARNINGS/ADVISORIES
MN...None.
WI...None.
MARINE...None.


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
PNGW3 - Port Wing, WI 30 mi67 minESE 1.9G7 50°F 30.24
DISW3 - Devils Island, WI 36 mi47 minESE 6G7 42°F 30.2934°F


Wind History for Duluth, MN
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KASX JOHN F KENNEDY MEMORIAL,WI 2 sm53 minN 0710 smClear46°F36°F66%30.26

Weather Map
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GEOS Local Image of Upper Mississippi Valley  
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Duluth, MN,





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