Marine Weather and Tide Forecast for Powell, OH

KEY MESSAGES
1) Mid and upper level low will track from the Great Lakes into New England Saturday. This will offer cooler temperatures, with the potential for frost and freezing conditions tonight, Saturday night, and Sunday night.

2) Temperatures will make a return to above normal for high temperatures for the first half of next week, returning to near normal for the second half.

DISCUSSION
KEY MESSAGE 1)

Mid and upper level low to track thru the Great Lakes tonight and into New England Saturday. This will place the Ohio Valley in a northwest flow pattern. At the surface a secondary cold front pushed thru the area this morning. In the wake of this front temperatures will drop to the low to mid 30s tonight. Have continued the frost advisory across the southern counties. Surface high pressure builds into the Lower MS Valley Saturday/Saturday night. Considerable clouds - especially across the north will diminish late in the day into Saturday evening. Decreasing winds combined with clear skies will lead to cool overnight temperatures. Expect lows generally in the lower 30s with some cooler valleys bottoming out in the upper 20s. Some minor moderation to temperatures Sunday night but still cool with lows in the lower and middle 30s.

KEY MESSAGE 2)

A dry forecast is expected through most of next week as northwest flow aloft becomes more westerly. High temperatures in the upper 50s and lower 60s Monday warm into the middle 60s Tuesday. A short wave to dig southeast across the Great Lakes and Ohio Valley Thursday and Friday. This system will bring the next chance for rain and offer cooler temperatures with highs in the lower and middle 50s for Friday and Saturday and lows in the lower 30s.

AVIATION /00Z SATURDAY THROUGH WEDNESDAY/
Stratocumulus with bases around 5000 feet will gradually lower to MVFR conditions Saturday morning under steady cyclonic northwest flow off the lakes. Therefore, northern sites have a greater chance for 2500 feet ceilings and confidence is lower that this will impact CVG/LUK.
As high pressure builds in Saturday afternoon, clouds will gradually scatter out.

Northwest winds will drop to less than 10 knots tonight and increase to 10-12 knots Saturday. As high pressure builds in, winds will become light and variable at the end of the period.

OUTLOOK...Significant weather is not expected.

ILN WATCHES/WARNINGS/ADVISORIES
OH...Frost Advisory from midnight tonight to 9 AM EST Saturday for OHZ073-077>082-088.
KY...Frost Advisory from midnight tonight to 9 AM EST Saturday for KYZ089>100.
IN...Frost Advisory from midnight tonight to 9 AM EST Saturday for INZ073>075-080.