Sunshine for Tuesday, rain and storms for Wednesday

finger lakes weather forecast tuesday september 7 2021 high pressure sunny mild wednesday thunderstorms
Sunshine and mild temperatures will make for a pleasant day today, but rain and thunderstorms will move through tomorrow. [Photo by Meteorologist Drew Montreuil]

High Pressure, Low Pressure

An area of high pressure will move through the Finger Lakes today, followed by a cold front associated with low pressure on Wednesday.

The core of this high pressure system is over the Mid-Atlantic, but a narrow extension of the high reaches up through Pennsylvania, over the Finger Lakes, and into Canada.

This pattern will result in a quiet and sunny day with mild temperatures thanks to the southwesterly flow of air around the center of the high pressure.

Afternoon highs will range from 75 to 80 degrees for most areas. A few higher elevations between Syracuse and Cortland may be a touch cooler. The best chance for hitting 80 degrees will be from Rochester to Geneva.

Skies are mostly clear to start off this morning but will mix with fair weather clouds throughout the day. No rain is expected from any of these puffy cumulus clouds.

The wind will be light with speeds near or just above 5 mph through the late afternoon. Tonight, the wind turns more southerly and increases to around 10 mph. Some periods of clouds will also move in, especially after midnight.

This will add up to a warm night with lows generally in the mid 60s.

A slow-moving band of rain will enter the western Finger Lakes on Wednesday morning. This will track into the middle of the region during the midday and early afternoon. Most of this rain will be light, but it may stick around for a couple hours.

By the mid to late afternoon, the band will intensify as thunderstorms start to develop over the eastern third of the region. A few of these storms could become robust with some strong winds and locally heavy rain. This will be most likely from about Syracuse to Ithaca to Elmira and for points east, mainly after 4 PM.

finger lakes weather 7-day forecast tuesday september 7 2021
This graphic represents an average over the entire Finger Lakes region. Localized variations should be expected. Click to enlarge.

Late Summer Pattern

Low pressure will still be the primary influence for our weather on Thursday. Cooler air will start to build in with highs topping out in the low 70s.

Scattered showers be possible throughout Thursday, but especially during the midday and afternoon hours. There is some question as to how many showers will pop up, so it could end up being more dry than not.

Clouds and a few showers will linger into Friday morning. By this time, the core of the cool air will be overhead. Morning lows Friday will mainly range from 50 to 55 degrees and afternoon highs will be in the upper 60s.

Saturday morning will start equally chilly, but afternoon highs will bounce back to the mid 70s. It should be a fine day similar to today, with a good deal of sun and no rain.

Temperatures will continue to climb on Sunday and much of the region looks to have a shot at breaking into the low 80s. Monday may be a touch cooler, but the middle of next week also looks potentially warm.

That should end with a cold front later next week, sometime around late Wednesday or Thursday with some rain. High temperatures should settle back into the 70s thereafter.

More Information:

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finger lakes weather 7-day forecast tuesday september 7 2021
This graphic represents an average over the entire Finger Lakes region. Localized variations should be expected.

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Follow Meteorologist Drew Montreuil:
Meteorologist Drew Montreuil has been forecasting the weather in the Finger Lakes region since 2006 and has degrees in meteorology from SUNY Oswego (B.S. with Honors) and Cornell (M.S.). Drew and his wife have four young boys. When not working or playing with the boys, he is probably out for a run through the countryside.