Marine Weather and Tide Forecast for Hamilton, OH

KEY MESSAGES
1) Cooler temperatures the next couple of days.

2) A series of low pressure systems moving across the Great Lakes will bring chances for showers and thunderstorms Tuesday night and then again Wednesday night into Thursday.

DISCUSSION
KEY MESSAGE 1)

Surface high pressure will build into the Ohio Valley through this afternoon. With a cool airmass in place, temperatures today will be about 10 degrees below normal with daytime highs only in the lower 70s. With clear skies and light winds, lows tonight will dip into the low to mid 50s. Temperatures will begin to recover on Tuesday but still remain several degrees below normal with daytime highs in the mid to possibly upper 70s.

KEY MESSAGE 2)

A mid level low will shift quickly east across the southern Great Lakes Tuesday night. This will be accompanied by a weak cold front that will approach from the west with a 30-40 knot 850 mb jet shifting eastward across our area through the night. In the southerly flow, weak moisture advection up into the Ohio Valley will lead to a developing chance for showers and thunderstorms Tuesday evening and into the overnight hours.

A stronger mid level short wave will shift east across the Great Lakes Wednesday into Thursday. In developing southerly flow ahead of this, a warm front will lift north across the region Wednesday night. This will lead to an impressive surge of moisture up into the region Wednesday night as an anomalously strong 50-60 knot 850 mb jet shifts east across the mid Ohio Valley. With some lingering instability and the increasing moisture, widespread showers and thunderstorms will be possible Wednesday night into Thursday morning Strong 0-3 km and 0-6 km shear will result in a threat for severe storms Wednesday night. In addition, locally heavy rainfall will be possible as PWs increase to 2+ inches through the night. Pcpn chances will continue into Thursday before a cold front moves through the area. Given the strong wind fields, gusty gradient winds will also be possible Wednesday night into Thursday.

AVIATION /03Z MONDAY THROUGH FRIDAY/
High pressure will build into the area through today. With some lingering surface moisture and decreasing winds, some MVFR to locally IFR fog will be possible through daybreak, especially in the river valleys. Otherwise, expect some sct cu today with clear skies again tonight.

OUTLOOK... Thunderstorms and gusty winds possible Wednesday and Thursday.

ILN WATCHES/WARNINGS/ADVISORIES
OH...None.
KY...None.
IN...None.