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From: Thomas Giella, KN4LF (kn4lf{at}gbronline.com)
Date: Sun Dec 29 2002 - 13:22:30 EST
2002 Florida Daily Weather Discussion
http://www.kn4lf.com/sub/fmci17.htm
Published Sunday 12/29/02 11:00 AM EST
I misjudged the speed at which our cold surface high pressure ridge moved
east overnight. Most of this season we have had and El Nino enhanced fast
moving jet stream that has aided in moving our endless parade of cold
surface high pressure eastward at a fast clip. This time however I
overlooked the development of the interrelated mid level thumb ridge, which
allowed the surface high to move slower. End end result was a 25-30 mph
boundary level wind that allowed occasional mixing down to the surface,
resulting in a cyclical rise and fall of surface winds of 1-3, mph that
interfered with the strengthening of the surface level temperature inversion
and slowed the temperature fall.
Bottom line though is that this morning still dawned as the coldest of the
season with mid 20's deep into the south central citrus growing region. The
cold spot in the state was on the south central peninsula with 23 deg. at
Venus, which is located WNW of Lake Okeechobee. The cold spot across the
north was 27 deg. at Crestview, with Immokalee the cold spot across the
southern peninsula with 34 deg.
Other notable minimum temperatures on the central peninsula include 24 deg.
at East Nobleton, 25 deg. at Brooksville and Inverness, 26 deg. at San
Antonio, 27 deg. at Mount Plymouth and Archbold, 28 deg. at Knights Station,
Ocala and Lady Lake and 30 deg. with a heavy frost here in rural West Plant
City, east of Tampa.
As is usually the case except in severe freeze events, virtually all urban
reporting stations on the peninsula had minimum temperatures above freezing.
Lakeland had 33 deg., Jacksonville and Orlando had 34 deg., Melbourne 37
deg., Tampa and Fort Myers 40 deg. and Miami 53 deg.
Tonight will be another cold one though warmer then last night due to
airmass modification. The subfreezing line should extend down to
approximately I-4 for early Monday morning 12/30/02.
Then we will see a rapid warm up on Monday afternoon, as yet another El Nino
enhanced winter storm arrives during the early day Tuesday 12/31/02 and
lasts into New Years Day Wednesday 01/01/03. This means yet another round of
widespread heavy rainfall and severe thunderstorms possible for the state's
already water logged river basins.
Thomas Giella
FL Meteorological & Climatic Institute
http://www.kn4lf.com/sub/fmci.htm
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