Could snow showers form inland on the 5th of January?
Minor shifts west of the trough, like what happened on the ICON 12z significantly increases snow shower potential, even far inland.
Using London as an example again. The LCL height is only at roughly 300m high on the ICON 12z on the 5th of January
This then allows clouds to be closer to the surface, and grow thicker. In this specific case, the cloud seems to get to 2km thick based on RH, which is supportive of little flurries, snow showers, and possibly even bursts of heavy snow with the lapse rate at 7.0. I doubt that these would be possible to forecast unless a polar low develops, which ends up
However, it's important to consider that sounding at this range aren't reliable at all, which I forgot to mention in my morning post. This just serves as an example of what is possible with westward shifts.
The sea level pressure at this point is 1013, the 850hPa temperature was -6 to -8, and the 2m temp was roughly around 1C. If this were to verify, and precipitation were to develop, snow would be expected, likely powder snow if it gets heavy enough and evaporative cooling gets underway
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