Weather

777 
fxus62 kjax 060243 
afdjax 


Area forecast discussion 
National Weather Service Jacksonville Florida 
940 PM EST Monday Jan 5 2009 


Update...area 00z sounding generally show warming aloft past 24 
hours as middle-upper level ridging builds over the area. Water vapor 
imagery shows strong progressive trough over the southwestern U.S. With a 
strong upper level jet from Texas to Ohio Valley reaching speeds of 
about 180 knots. At surface...stationary front is across eastern Tennessee to northern 
Georgia and SW into la. The County Warning Area remains in a warm and moist southerly flow 
at this time with temperatures in the middle/upper 60s and dewpoints upper 50s to 
near 60. Southerly flow at 1000 mb only about 5-10 knots but expected to 
increase to about 10-15 knots after 06z. Any prospects for a shower 
over southeast Georgia coming to a quick end with loss of heating and no upper 
support. Lows tonight look on track mainly in the middle to upper 
50s. The main weather impact tonight is the fog and fog product already 
shows a swath of low clouds and some dense sea fog from west of tlh 
to Gilchrist County into western Marion. May go ahead and issue a 
dense fog advisory for a portion of the Suwannee Valley and may 
include a couple counties in southeast Georgia as the fog rolls in overnight. 
Northern and eastern extent of this fog may make it to the Highway 301 by 
12z Tuesday. Will beef up wording in the zones for this as well. 


&& 


Aviation...may need to adjust taf's for a slightly later start to 
fog at East Coast sites and likely earlier start at kgnv. 


&& 


Marine...went ahead and hoisted a Small Craft Advisory for the 
offshore waters from late Tuesday to early Friday on the 4pm issuance. Middle 
shift will probably need to hoist a shorter duration advisory for 
the near shore waters. Will also word fog as late in the 1st period 
and early in the 2nd period as low-level flow is expected to rapidly 
increase Tuesday morning. 


&& 


Preliminary point temps/pops... 
amg 57 79 60 65 / 10 10 40 60 
ssi 59 75 59 70 / 10 10 30 60 
jax 57 82 59 73 / 10 10 20 60 
sgj 60 80 63 74 / 10 10 20 50 
gnv 55 82 60 72 / 10 10 20 60 
ocf 55 83 60 75 / 10 10 20 60 


&& 


Jax watches/warnings/advisories... 
Florida...none. 
Georgia...none. 
Am...Small Craft Advisory from 10 PM Tuesday to 4 am Friday for Altamaha 
Sound Georgia to Flagler Beach Florida 20 nm to 60 nm offshore. 


&& 


$$ 


Shashy/Carroll/Keegan