Spot Forecast
Issued by NWS Marquette, MI
Issued by NWS Marquette, MI
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FNUS73 KMQT 201459
FWSMQT
Spot Forecast for Operation Joe Mama...USCG
National Weather Service Marquette MI
1059 AM EDT Thu Aug 20 2026
Forecast is based on forecast start time of 1100 EDT on August 20.
If conditions become unrepresentative...contact the National Weather
Service.
.DISCUSSION...
Light winds primarily out of the south/southwest to start off
gradually turn more easterly today as low pressure moves into
northern WI. Winds pick up into the evening, with gusts up to 15kts
possible. This yields wave heights of less than a foot the rest of the daytime
hours, increasing to around a foot after sunset. Meanwhile, light
rain showers are spreading across western Lake Superior, with thunder
becoming possible mid to late afternoon. Spotty showers and storms
continue through the rest of the afternoon and evening, finally
wrapping up between 03-06Z. Any storms could lead to brief drops in
visibility and ceilings, as well as erratic winds. Given an increase
in lower-level moisture, there is a potential for patchy fog and low
stratus to develop over the lake tonight into early Friday, with
ceilings dropping down to MVFR before lifting again later Friday
morning. Winds turn over to the NW Friday behind a cold front, but
remain fairly light at around 5-10kts with wave heights of a foot or
less. Otherwise, any additional rain chances stay contained to
eastern Lake Superior.
For enroute and areal forecasts please contact Marquette MI.
.REST OF TODAY...
Sky/weather.........Mostly cloudy (75-85 percent). Chance of
showers late in the morning, then showers and
slight chance of thunderstorms in the
afternoon.
Chance of pcpn......80 percent.
Chance of thunder...15 percent.
Temperature.........61 at forecast start...Max 65.
Surface winds.......Northwest winds around 6 knots shifting to the
southeast 7 to 8 knots in the afternoon.
Ceiling (kft).......8.6 decreasing to 8.0 early in the afternoon,
then decreasing to 6.5 late in the afternoon
increasing to 8.4 late in the afternoon.
Visibility (sm).....9.
Wave Height.........Waves calm to 2 feet.
Wave period.........2 seconds.
Freezing Spray......MISSING.
Lake Surface Temp...60 Degrees Fahrenheit.
Wave Direction......133.
TIME (EDT) 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........76 79 81 76 85 79 75
Weather cov.....CHC CHC CHC LKY LKY DEF LKY
Weather type....RW RW RW RW RW RW RW
Tstm cov........ SCH
Chc of pcpn (%).30 30 30 60 70 80 60
Chc of thdr (%).0 0 0 10 10 10 20
Temp............61 62 63 63 63 63 63
Ceiling (kft)...9.0 8.6 8.0 6.8 6.5 6.9 8.4
Visibility (sm).10 10 10 9 10 10 10
Surface wnd dir.NW SE SE SE SE SE SE
Surface wnd spd.6 7 7 7 8 8 8
Surface wnd gst.9 10 10 10 12 12 12
Wave Direction..200 180 180 180 130 130 130
Wave period (s).2 2 2 2 2 2 2
Wave height (ft)0 0 0 0 1 1 1
Freezing spray..
.TONIGHT...
Sky/weather.........Mostly cloudy (70-80 percent) then becoming
partly cloudy (40-50 percent) then becoming
mostly cloudy (55-65 percent). Showers likely
and slight chance of thunderstorms in the
evening, then slight chance of showers
overnight.
Chance of pcpn......60 percent.
Chance of thunder...19 percent.
Temperature.........Min 60.
Surface winds.......East winds 7 to 9 knots shifting to the
southeast around 7 knots overnight, then
shifting to the northeast around 6 knots after
3 am.
Ceiling (kft).......5.6 decreasing to 4.2.
Visibility (sm).....8 decreasing to 6 overnight.
Wave Height.........Waves calm to 2 feet.
Wave period.........4 seconds.
Freezing Spray......MISSING.
Lake Surface Temp...60 Degrees Fahrenheit.
Wave Direction......100.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........70 74 83 83 77 82 77 65 63 45 54 69
Weather cov.....LKY CHC CHC CHC CHC SCH SCH
Weather type....RW RW RW RW RW RW RW
Tstm cov........SCH SCH SCH SCH SCH
Chc of pcpn (%).60 50 50 40 40 20 20 10 10 10 10 0
Chc of thdr (%).20 20 20 20 20 10 10 10 0 0 0 0
Temp............63 63 63 63 63 63 63 63 63 62 62 62
Ceiling (kft)...6.5 5.9 5.7 5.8 5.6 5.4 4.8 4.6 4.6 5.2 4.2 4.2
Visibility (sm).10 10 10 10 10 10 9 8 8 7 6 6
Surface wnd dir.E E E SE SE SE SE SE SE NE NE NE
Surface wnd spd.9 9 9 8 8 8 7 7 7 6 6 6
Surface wnd gst.14 14 14 13 13 13 11 11 11 10 10 10
Wave Direction..100 100 100 100 100 100 100 100 100 100 100 100
Wave period (s).3 3 3 3 3 3 4 4 4 3 3 3
Wave height (ft)1 1 1 1 1 1 1 1 1 1 1 1
Freezing spray..
.FRIDAY...
Sky/weather.........Partly sunny (55-65 percent).
Chance of pcpn......10 percent.
Chance of thunder...3 percent.
Temperature.........Max 67.
Surface winds.......North winds 5 to 8 knots shifting to the
northwest around 5 knots late in the afternoon.
Ceiling (kft).......2.6 decreasing to 2.0 early in the morning,
then decreasing to 1.3 late in the morning
increasing to 2.0 early in the afternoon
increasing to 4.8 increasing to 7.2 late in the
afternoon increasing to 9.6.
Visibility (sm).....4 increasing to 10.
Wave Height.........Waves calm to 2 feet.
Wave period.........3 seconds.
Freezing Spray......MISSING.
Lake Surface Temp...60 Degrees Fahrenheit.
Wave Direction......20.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........68 80 64 56 62 66 65 65 54 56 53 35
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0 0 10 10 10 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............61 61 62 62 62 63 63 63 63 63 64 65
Ceiling (kft)...2.8 2.6 2.3 2.0 1.6 1.3 1.7 2.0 2.4 4.8 7.2 9.6
Visibility (sm).4 6 8 8 9 10 10 10 10 10 10 10
Surface wnd dir.NE NE NE NE NE NE N N N NW NW NW
Surface wnd spd.7 7 7 8 8 8 7 7 7 5 5 5
Surface wnd gst.10 10 10 11 11 11 10 10 10 7 7 7
Wave Direction..100 100 100 040 040 040 020 020 020 020 020 020
Wave period (s).3 3 3 3 3 3 3 3 3 3 3 3
Wave height (ft)1 1 1 1 1 1 1 1 1 1 1 1
Freezing spray..
$$
Forecaster...LC
Requested by...Ethan Russell
Type of request...MARINE
.TAG 2620084.0/MQT
.DELDT 08/20/26
.FormatterVersion 2.0.0
.EMAIL Ethan.c.russell@uscg.mil