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LEZ168 Expires:202312082115;;113472 Fzus61 Kcle 081415 Glfle
open lake forecast for lake erie national weather service cleveland oh 915 am est Fri dec 8 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 warm front will lift north across lake erie during the day today. Low pressure 29.60 inches enters the region from the southwest Saturday swinging a cold front eastward across lake erie on Sunday. Lingering trough averaging 29.80 inches persists through Monday. High pressure 30.30 inches will build north toward the lower great lakes into mid-week.
lez164>168-082115- the islands to vermilion oh beyond 5 nm off shoreline to us- canadian border- vermilion to avon point oh beyond 5 nm off shoreline to us- canadian border- avon point to willowick oh beyond 5 nm off shoreline to us- canadian border-willowick to geneva-on-the- lake oh beyond 5nm off shoreline to us-canadian border-geneva-on- the-lake to conneaut oh beyond 5 nm off shoreline to us- canadian border- 915 am est Fri dec 8 2023
This afternoon..South winds 15 to 20 knots diminishing to 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet.
Tonight..South winds 10 to 15 knots increasing to 15 to 20 knots. A slight chance of showers late. Waves 1 to 3 feet.
Saturday..South winds 15 to 20 knots. Scattered showers in the afternoon. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet.
Saturday night..South winds 10 to 15 knots becoming west. Showers. Waves 1 to 3 feet.
Sunday..Northwest winds 10 to 15 knots increasing to 15 to 25 knots. Rain showers likely during the day, then a chance of rain showers Sunday night. Waves 1 to 3 feet building to 3 to 6 feet.
Monday..Northwest winds 15 to 20 knots becoming southwest. Waves 3 to 5 feet.
Tuesday..Southwest winds 15 to 25 knots becoming west. Waves 3 to 6 feet subsiding to 2 to 4 feet.

LEZ100
No data

FXUS61 KCLE 081415 AFDCLE

Area Forecast Discussion National Weather Service Cleveland OH 915 AM EST Fri Dec 8 2023

SYNOPSIS
Low pressure over the upper Midwest moves over the northern Great Lakes by tonight. A stronger area of low pressure moves into the central Great Lakes Saturday afternoon with its cold front moving eastward across the region Saturday night into Sunday morning. High pressure moves eastward across the region on Monday.

NEAR TERM /THROUGH SATURDAY/
930AM Update...
Slight adjustments were made to temperatures to have the overall high for today be a degree or two warmer given the more widespread clearing this morning. In addition, adjusted sky coverage to have most clear skies today with some high clouds building in across western counties this evening.

Previous Discussion...
High level cloud cover will move west to east across the region this morning with an axis of ridging at the middle levels of the atmosphere. As this ridge shifts east of the region it will allow some low level moisture to increase on a LLJ. This increased moisture and sunshine should allow for the development of some strato cumulus which may become broken to overcast across west of I-71 by the afternoon. This increased cloud cover likely keeps the low level jet from mixing efficiently to the surface.
So this should keep wind gusts under control with speeds remaining under 30 mph.

Highs today should be into the 50's areawide. Increasing cloud cover and a southerly breeze overnight will keep lows in the 40's tonight.

Saturday will see warmer temperatures with some uncertainty about how much sunshine the region will see the. The thicker the cloud cover the region experiences the lighter the winds will be. However it still appears winds may touch 30-35 mph across the western CWA and in the downsloping flow across NW PA. There will be increased lift through the day but nothing to really focus any shower development. So for now will place an isolated to scattered shower mention through the afternoon. A few locations will at least approach record temperature levels on Saturday with highs ranging from the mid 50's to lower 60's.

SHORT TERM /SATURDAY NIGHT THROUGH MONDAY NIGHT/
Expansive upper level trough crosses east through the Great Lakes and Ohio Valley regions this weekend. Widespread rainfall will occur across the majority of the CWA Saturday night into the day Sunday.
Portions of our area could see periods of heavier rainfall as the best upper support and LLJ move overhead overnight Saturday. QPF amounts Saturday night into Monday morning up to 1 inch along and east of the I-71 corridor where the best jet support looks to set up. Locations west of I-71 and along the I-75 corridor will see lower QPF amounts between 0.25-0.75 inches. As previous discussions mentioned, this is a longer duration event so there are no concerns for flooding at this moment. Will continue to monitor the evolution of this system and keep an eye on our most responsive rivers and creeks.

As the cold front crosses eastward during the day Sunday mean flow turns northwesterly with 850mb temperatures dropping between -7C and -10 C. This will turn lingering rain showers across northeast Ohio and northwest Pennsylvania into lake effect snow showers Sunday night. Lake effect snow showers gradually dissipate through the day Monday as mid level ridging and drier air build north into the Ohio Valley. Overall snow accumulations will be fairly light across the primary snowbelt. Snow totals generally less than an inch for most and up to 1 to 1.5 inches across higher elevations in northwest Pennsylvania.

Ahead of the cold front, overnight low temperatures Saturday night will range between the upper 30s to lower 40s. Behind the cold front, overnight lows drop into the 20s areawide. Highs on Sunday rise into the mid to upper 40s. Cooler on Monday with highs in the low 30s in northeast Ohio and northwest Pennsylvania and upper 30s across western Ohio.

LONG TERM /TUESDAY THROUGH THURSDAY/
The aforementioned high pressure ridging will continue to build northward into the lower Great Lakes region through mid week. This should allow for a fairly quiet period of weather through next week.
There is a slight chance for lake effect precip across northwest Pennsylvania during the day Wedneday as a subtle shortwave aloft sags southward. High pressure then returns into the end of the week.

Highs in the 40s for much of next week with lows in the upper 20s the lower 30s.

AVIATION /12Z Friday THROUGH Tuesday/
VFR conditions are anticipated through the TAF period. High level cloud cover moves west to east through mi/late morning.
We then wait to see the coverage of some low level VFR strato cumulus during the afternoon hours near and west of I-71. Still a bit of uncertainty on how fast these move eastward through the afternoon. Current thinking is that this cloud cover over may dip to 3500-5000 feet.

South to southwest winds increase through the morning with 10 to 15 knots common. The strongest winds will be located across NW OH where a low level jet will be located. This low level jet moves across NW OH through mid morning with some low level wind shear likely until surface winds increase with deeper mixing.

Outlook...Non-VFR in isolated/scattered showers Saturday. Non- VFR continues Saturday night into Sunday in widespread rain. As the system exits to the east, lake effect snow may produce non- VFR conditions across NE OH into NW PA Sunday night and Monday.

MARINE
A warm front will lift north across Lake Erie this morning and allow for southerly winds to increase to 15-20 knots. Highest winds and waves should remain offshore. Southerly winds remain elevated over the lake through the weekend as a low pressure system enters the lower Great Lakes region. This low will swing a cold front eastward across the lake Saturday night into Sunday and turn winds west- northwesterly by Sunday morning. Our next best chance for small craft advisories will come Sunday night into early next week as onshore flow increases to 20-25 knots. This should allow for waves in the nearshore to build to 3 to 6 feet, mainly across the central and eastern basins. Headlines will likely remain in place over the lake into the middle of next week as winds and waves remain elevated.

CLIMATE
It is expected to get very warm on Saturday, December 9th, with temperatures approaching record high levels. Here are the records for Saturday:

Date Toledo Mansfield Cleveland Akron Youngstown Erie

12-09 60(1952) 60(1952) 62(1952) 62(1952) 64(1952) 65(1885)

CLE WATCHES/WARNINGS/ADVISORIES
OH...None.
PA...None.
MARINE...None.

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