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LEZ163 Expires:202312110915;;259892 Fzus61 Kcle 110234 Glfle
open lake forecast for lake erie national weather service cleveland oh 934 pm est Sun dec 10 2023
for waters beyond five nautical miles of shore on lake erie
waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum.
Synopsis.. A trough averaging 30.10 inches will persist over the lake through morning before exiting to the east Monday afternoon as high pressure 30.40 inches builds northeast towards the lower great lakes. A series of cold fronts will cross the lake Tuesday evening into Wednesday before high pressure 30.70 inches builds over the great lakes Thursday into Friday.
lez162-163-110915- detroit river lt. To maumee bay oh to reno beach oh beyond 5nm offshoreline to us-canadian border- reno beach to the islands oh beyond 5nm off shoreline to us- canadian border- 934 pm est Sun dec 10 2023
Rest of tonight..Northwest winds 15 to 20 knots. A slight chance of rain and snow showers, then a slight chance of snow showers late. Waves 1 to 3 feet.
Monday..Northwest winds 15 to 20 knots becoming west. Waves 1 to 3 feet.
Monday night..West winds 15 to 20 knots becoming southwest. Waves 1 to 3 feet building to 2 to 4 feet.
Tuesday..Southwest winds 15 to 25 knots becoming west. Waves 2 to 4 feet.
Tuesday night..West winds 15 to 20 knots. Waves 1 to 3 feet.
Wednesday..West winds 15 to 20 knots diminishing to 10 to 15 knots. Waves 1 to 3 feet.
Thursday..Southwest winds 10 to 15 knots. Waves 1 to 2 feet.
Friday..Southwest winds 5 to 15 knots becoming west. Waves 2 feet or less.

LEZ100
No data

FXUS61 KCLE 110324 AFDCLE

Area Forecast Discussion National Weather Service Cleveland OH 1024 PM EST Sun Dec 10 2023

SYNOPSIS
A cold front will move through the region tonight and a residual trough will settle across the area for Monday. High pressure will build from the south for Monday night into Tuesday. Another cold front will enter northeast of the area for Tuesday night into Wednesday.

NEAR TERM /THROUGH MONDAY NIGHT/
Showers have expanded east of Cleveland this evening as the front starts to push south across Lake Erie. Dewpoints have increased with the arrival of the showers and most of this activity has been rain or a rain/snow mix. Activity is still pretty limited across lower Michigan and disorganized across Lake Huron. A piece of energy ahead of the 500mb cold pool is forecast to cross Lake Erie over the next several hours with increasing coverage. The low level cold advection increases after midnight and should see an eventual change over to primarily snow. Pavement temperatures are mainly in the upper 30s to lower 40s so accumulations will be mainly on grassy or elevated surfaces. Best chances for accumulation look to be in northwest Pennsylvania if we can establish some type of connection to Lake Huron towards morning. Main adjustment to the forecast was to raise minimum temperatures slightly with limited breaks in the clouds across NW Ohio.

Previous discussion...All attention this afternoon is on a front located across southern Lower Michigan that will continue southeast toward the forecast area for this evening. The front is largely inactive across SE Michigan with some light rain/snow but more snow activity is located over SW Michigan with the lake enhancement. Expect some better ignition of snow with the front crossing Lake Erie and have PoPs increasing to likely/categorical in NE OH/NW PA after dark. Snow chances seem more fleeting elsewhere and have a slight chance to chance mention.

With this forecast cycle, the trend in the total lake effect or lake enhanced snow seems to be down compared to the last 2-3 cycles. It is becoming more evident that the deeper moisture once expected across the region tonight into Monday is less present with the cold front and there could only be a brief window tonight with barely enough moisture into the DGZ to get some more perky snow showers. Otherwise, the moisture in the atmosphere seems very shallow, confined to the sfc-850 mb layer.
Some lake induced instability remains with temperatures at 850 mb of -8 to -10 degrees C and lake surface temperatures around 6 C, but this isn't the most favorable amount of lake instability.
In the end, the flavor of the forecast is just some light snow showers for 12 hours late tonight into Monday for extreme NE OH and NW PA. The snow forecast has been knocked back an inch or two in this region. The best accumulations will be in interior Erie County, PA, where the placement of the Lake Huron connection will likely sit and there will be help with the higher terrain of the hills in the eastern portion of the county. There could be up to 4 inches of snow here, but overall, the forecast seems to be a more widespread 2-3 inches for the zone and have opted against a Winter Weather Advisory with this package. Elsewhere, there could be some scattered lake clouds and light snow with origins off Lake Michigan or Lake Erie (with help from the terrain of the hills of North Central Ohio) but nothing incredibly notable for snow accumulations expected.
Temperatures through the period will not be out of the norm for the start of the 2nd week of December with highs and lows in the 30s.

A low level ridge and surface high pressure will build into the region on Monday night and bring drier air and backing flow to the region. This will shut down any remaining snow showers across the region. Clearing conditions will allow for temperatures to drop into the 20s for Monday night.

SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/
High pressure continues to build east across the region Tuesday with dry weather anticipated through at least Tuesday evening. Cyclonic flow develops aloft Tuesday night into Wednesday with a series of troughs and surface cold fronts pivoting across the CWA through Wednesday. Generally expect dry frontal passages due to significant dry air in the low to mid levels, but there may be sufficient moisture and lake-induced instability in far NW PA for isolated light lake-enhanced rain/snow showers with very little (if any snow accumulation) Tuesday night into Wednesday. Maintained slight chance PoPs for this area for Tuesday night through Wednesday afternoon, but it's possible that all locations remain dry. A strong surface high and upper ridge build over the local area Wednesday night, resulting in widespread dry weather.

Expect highs in the 40s Tuesday with cooling temperatures due to cold air advection on Wednesday; highs should only be in the 30s.
Overnight lows will be in the 20s each night, but locations near the lakeshore may be a touch warmer in the lower 30s Tuesday night and a few inland locations may dip into the teens Wednesday night.

LONG TERM /THURSDAY THROUGH SUNDAY/
The aforementioned high and upper ridge anchor over the region through at least Friday and dry weather will persist through the end of the workweek. Still some uncertainty in the synoptic setup over the weekend, but an upper trough may move across the region Saturday, which could result in the next chance of precipitation.
Temperatures moderate during the long term period with highs in the lower 40s THursday rising to the mid to upper 40s Friday and Saturday.

AVIATION /00Z Monday THROUGH Friday/
Precipitation is starting to fill in across Lake Erie with only a few very light reports of precipitation inland. Precipitation is starting off as a rain/snow mix, but will transition to more of a snow across the snowbelt overnight as a cold front arrives and where the better coverage of showers will be. Visibilities in snow will primarily be MVFR but can not rule out a brief dip to IFR at CLE/ERI/CAK/YNG. Any precipitation at TOL/FDY/MFD will be both brief and light. Ceilings will be primarily MVFR until late tonight when some drier air and possible clearing starts to work into NW Ohio. Ceilings will lift to VFR by midday on Monday.

Winds will shift to the northwest behind the cold front by 06Z at 7-12 knots. Winds will back to westerly and eventually southwesterly on Monday as a ridge of high pressure builds into the Ohio Valley.

Outlook...Non-VFR may linger in NE Ohio and NW PA into Monday night. A cold front may bring some non-VFR ceilings on Tuesday night into Wednesday for extreme NE OH/NW PA.

MARINE
Unsettled marine conditions persist through the next several days ('tis the season!) with Small Craft Advisories likely continuing through at least the first half of the week. West winds 15 to 20 knots early this evening will shift to the northwest tonight and continue through Monday with winds increasing to 20 to 25 knots in the open waters of the central basin Monday morning. Although winds gradually become southwesterly Monday evening into Tuesday, wind speeds increase as strong high pressure builds over the region and a cold front approaches from the northwest Tuesday which will likely lead to an extension of the current Small Craft Advisory. Winds will likely increase to around 20 knots in the nearshore zones and the open waters may reach 25 to 30 knots, especially in the central and eastern basin towards the border of the Canadian waters. Wind direction should be too southwesterly for any low water concerns in the western basin, but may need to keep an eye on forecast water levels at Toledo if guidance trends a bit more westerly. The passage of a cold front will allow winds to shift to the west/northwest and diminish to 15 to 20 knots Tuesday night into Wednesday, but headlines will likely persist due to onshore flow.

Calmer marine conditions may arrive by Wednesday night or early Thursday as winds diminish to 10 to 15 knots, but winds may once again increase as flow becomes southwesterly and increases slightly in response to warm air advection.

CLE WATCHES/WARNINGS/ADVISORIES
OH...None.
PA...None.
MARINE...Small Craft Advisory until 1 PM EST Monday for LEZ144.
Small Craft Advisory until 7 PM EST Monday for LEZ145.
Small Craft Advisory until 4 AM EST Tuesday for LEZ146>149.

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