May 21, 2013
UPDATE...
Based on latest fog and pop guidance...added fog to all areas
after midnight with focus on ern areas. patchy to areas of dense fog
after 3 AM EST from west to east. Also tweaked pops dropping any
rain from ern most counties.
NEAR TERM [Through Tonight]...
Little substantive change in the pattern is forecast in the near
term and therefore persistence will be a good forecast. The upper
ridge is holding strong over FL and the Bahamas with a giant
positively tilted trough dominating the western 2/3 of the nation.
Surface analysis shows a cold front extending from near Pensacola
northeast through Atlanta to the Mid Atlantic coast. With upper
level flow parallel to the front, little movement of the front is
expected and in fact is is now analyzed as stationary. Slight to low
chance (20-30) PoPs will remain limited to the northwest half of the
forecast area. Min temps will range from the lower 50s southeast to
around 60 under thicker cloud cover over our western zones. These
clouds should once again limit fog formations across the west.
However, eastern areas could see areas of fog develop once again
after midnight and persist until 14Z or so. The fog is not
anticipated to be dense or widespread enough to require an advisory.
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