Wind and then low
clouds prevented ideal radiational cooling last night, with a low of 67F. The
cold front passed in the morning, leading to a maximum wind of 15-16 kt,
bringing with it drier low-level air. However, the low to mid-level clouds were
more persistent than expected, even through the afternoon, though it is finally
clearing out. The clouds prevented the winds from fully mixing down from aloft
as well, so they were not as strong as they could be. The clouds and perhaps
stronger cold advection than expected led to a high of only 81F so far.
Winds will switch
back to southeasterly tonight, leading to low-level moisture advection and low
clouds returning, with both wind and low clouds hampering radiational cooling,
just like last night, though if the clouds don’t form until late in the night,
it could still cool down to cooler than last night before warming up when the
clouds move in. The low clouds may not be as extensive as last night due to the
initially drier air mass. Whatever low clouds will burn off tomorrow morning,
and then with mostly sunny skies and slight warm advection with southerly winds
strengthening, a quick warmup to temperatures hotter than yesterday are
expected, perhaps slightly above model guidance. The sunshine will also help
mix down stronger winds aloft down to the surface, though USL’s wind might be
slightly too strong as usual.
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| Source: PivotalWeather |
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