What was with all the fog Friday morning?

Thursday rain, morning air temperatures combined in recipe for fog

CHICOPEE, Mass. (WWLP) – What a foggy Friday morning we had over parts of western Massachusetts! But why was it so foggy?

The main ingredient was the rain we had on Thursday that added moisture to the ground. That moisture increased the dew point temperatures at the surface. The dew point is the temperature at which the air is saturated. Air temperatures dropped to the dew point, and fog formed.

We mainly had fog in the valley though. That’s because the valley acts like a sink and the cool air drains to the bottom of it. As the air cooled more in the valley, we saw a strip of fog right along the Connecticut River and surrounding area.

Thankfully, the strong May sunshine was able to warm the air temperatures around the fog, lowering the saturation of the air and dissipating the fog.

Get used to morning fog a lot this time of year as humidity increases.

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