Sunrise 6:39 AM   Sunset 8:32 PM Moonrise 3:18 PM   Moonset 4:19 AM

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LHZ345 Straits Of Mackinac Within 5 Nm Of Mackinac Bridge Including Mackinac Island- 1008 Pm Edt Fri Apr 19 2024
Overnight - West wind 10 to 20 knots. Chance of showers early in the evening. Chance of snow showers through the night. Waves 2 feet or less building to 2 to 4 feet after midnight. Saturday - West wind 10 to 20 knots. Slight chance of rain and snow showers. Waves 2 to 4 feet. Saturday night - West wind 15 to 20 knots. Mostly clear. Waves 2 to 4 feet. Sunday - West wind 15 to 25 knots. Sunny. Waves 3 to 5 feet.
see the open lakes forecast for days 3 through 5.

LHZ300
No data

FXUS63 KAPX 200205 AFDAPX

Area Forecast Discussion National Weather Service Gaylord MI 1005 PM EDT Fri Apr 19 2024

KEY MESSAGES

- Scattered rain/snow showers overnight through Saturday, with the potential for graupel to mix in with any heavier showers.

- Cooler than normal temperatures through the middle of next week but no high impact weather expected.

UPDATE
Issued at 1005 EDT Fri Apr 19 2024 Deep troughing remains over the Western Great Lakes region late this evening
Weak short wave continues to slide thru our CWA
providing some enhancement to light rain/snow shower activity.
Have made some upward modifications to POPs thru the night based on radar and near term model trends. Precip will be very light...and expect little to no snow accumulation. Overnight lows will cool into the lower 30s.

SHORT TERM /THROUGH SUNDAY/
Pattern Synopsis/Forecast: Closed upper-level low pressure continues to spin across northern Ontario with broad/amplified troughing draped across the Great Lakes and upper MS Valley. Attendant surface low expected to follow suit to the northeast into Quebec by this evening. Initial cold front already east of our area with a secondary front expected to cross northwest to southeast later tonight into Saturday morning.

Forecast Details: Partly sunny skies across much of northern lower this afternoon with more cloud cover north of the bridge in closer proximity to the aforementioned surface low. Relatively steep lapse rates and increasing low-level moisture already supporting showers developing this afternoon across eastern upper. These showers perhaps mixed with graupel and/or snow at times into the overnight hours. Those chances spread across northwest lower and the tip of the mitt this evening and overnight with lower probabilities across northeast lower and especially near Saginaw Bay. Any snow accumulation likely minimal with some locations perhaps picking up a coating to a few tenths of an inch. Low temps tonight generally within a couple of degrees on either side of freezing -- coldest inland from the Great Lakes.

A similar story anticipated for Saturday with at least low chances for showers continuing under partly to mostly cloudy skies. While afternoon highs likely reach into the low-mid 40s area-wide, some snow mixing in remains a possibility, especially for the typically cooler/interior spots. Again, a minor accumulation not entirely out of the question, although with little impact expected.

LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/
Still expecting a breezy and cool weather pattern across the region over the next several days as a trough becomes established across northeast Canada. Do expect this trough to eventually give up the ghost late next week leading to warming temperatures. Looking farther ahead, above normal temperatures are expected for the last few days of the month. Precipitation chances in the long term are limited to Monday night into Tuesday night from a short wave moving in off of the Pacific and Friday via warm air advection. A majority of the upcoming low temperatures (with the exception of perhaps Monday night) will be at or below freezing with at least a couple of nights potentially as low as the low and mid 20s.

AVIATION /00Z TAFS THROUGH 00Z SUNDAY/
Deep troughing will remain over the Great Lakes region thru Saturday night
resulting in mainly cloudy skies
low VFR cigs and scattered light rain/snow showers for the next 24 hours.
Surface winds will remain from the west at 10 to 15 kts tonight...strengthening again to 15 to 25 kts on Saturday.

APX WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...Small Craft Advisory until midnight EDT tonight for LHZ345>349.
Small Craft Advisory until 5 AM EDT Saturday for LMZ323-341- 342-344>346.
Small Craft Advisory until 8 PM EDT Saturday for LSZ321.

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