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Bundle up going to those football games tonight as well as those youth soccer games Saturday morning! Tonight we’ll end up in the low 30s across much of the Tri-State, generating patchy frost but also fog near in the river valleys (where the water is still relatively mild). Thus clear, calm nights (especially ones with a covering of snow) will end up being our coldest nights. The Earth’s intrinsic heat radiates toward outer space at night, but under clear skies and calm winds there is nothing to restrain that heat close to the surface. If we had 10 of us in an elevator, it would get hot as our collective heat is penned in, but when outside or in water we would continue to lose heat (though thankfully we’re warm blooded and the body works to regulate our temperature). We have an internal temperature, we radiate heat out from our body. The way this works is the same way it works for our own bodies.

These clouds will be rather stubborn for a while, keeping temperatures in the 40s for much of the day, but we should just sneak into the low 50s later this afternoon once we get the clouds to actually break from west to east.īetter clearing settles in tonight, but this next round of cooling has a different term: “radiational cooling”. Whenever temperature differences get wider between the surface and aloft, the air is destabilizing toward clouds- this holds true whether it’s just the surfaced being warmed by sunshine, or the air aloft being cooled, or a combination of both. Colder air is still arriving aloft, and that is often a cloud-producer here, whether the Sun is shining or not.

(WSAZ) - The rains have departed, but a drizzly din remains.