Cold advection
with stiff northwesterly winds led to a low of 39F last night, followed by a
slower warmup to a high of 62F today. Maximum wind was surprisingly only 14-16 kt in the early
afternoon sunshine promoting vertical mixing of winds aloft down to the surface
before winds weakened through the vertical column as high pressure moved in. As
high pressure crests overhead and then moves to the south, winds will be light
tonight but turn southwesterly, with some warm advection slightly limiting
otherwise very good radiational cooling with very dry air. With a warmer air
mass tomorrow, some westerly winds initially, and continued sunshine, it will
be warmer. However, another weak cold front will pass from the north in the
early afternoon, with winds turning to weak northerly afterward. There will be
a temperature gradient in the area due to the slow-moving front, leading to a
somewhat greater uncertainty in the high temperature than usual for a fully
sunny day (warmer if the front is farther north and cooler if the front is
farther south). The front will likely also give a brief boost to winds,
especially with the afternoon sunshine promoting vertical mixing of winds aloft
down to the surface, perhaps with a maximum higher than USL’s paltry 10 kt.
| Source: PivotalWeather |
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