TODAY: Morning fog in many locations, no temperature issues. High pressure at the surface (per light wind) and in the mid-levels supplied by ample shallow moisture is the culprit for the fog, with that moisture being trapped by warmer air just above the ground. The inversion of temperatures per morning sounding and short-run model (RUC) forecast soundings indicate this inversion is shallow so the fog should be able to break up as heating occurs. With light winds aloft from near calm toward the east, low clouds could manifest as the fog breaks up and advect toward the east..but those too will thin out some working toward early afternoon. Otherwise, most locations will see the low 80Fs today with inland areas into the mid-80Fs easily with light inland winds and SE winds near the immediate coast (but light).
|The blue zig-zag lines are a depiction of surface axis or ridges of high pressure centers. Not that the fog is closer to the location of those lines.|
THIS WEEKEND: Prior to the weekend, namely Thursday-Saturday warmer yet still with highs most areas in the mid-80Fs and perhaps a few upper 80Fs as well, partly cloudy sky. Winds light again this evening become SSW-SW Thursday through Saturday. A cold front is approaching and should be able to tweak through sometime very early Sunday near daybreak and continue south to the Straits before becoming absorbed once again by high pressure (as was the case with the previous frontal boundary), after which time we will experience 2-3 days of slightly below normal temperatures but nothing earth-shattering (into Tuesday).
It appears there will be a cloudy and possibly showery period along with the boundary and behind it mainly, to persist a good 6-12 hours after cold frontal passage (Sunday).
Perhaps two days of highs reaching 70F or not quite even that, but morning lows will not get below the mid 40Fs (North interior), toward low 50Fs immediate East Coast Central to warmer yet all of South Florida.
NEXT WEDNESDAY: Wind will become more onshore toward early-mid week and strengthen. Plentiful stratocumulus clouds and low topped showers could begin by Tuesday, especially toward Wednesday. From that point on it appears a more synoptic (large scale) pattern is to emerge for the U.S. So far, no cold air on the way other than the upcoming cool spell, but rain chances could pick up significantly with the on-set of stronger onshore winds mid-late week next week and beyond prior to the next front. Looks more like 'late fall' type pattern as opposed to early spring.