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Area forecast discussion 
National Weather Service Houston/Galveston Texas 
545 am CST Monday Nov 23 2009 


Update... 
12z aviation update below. 


&& 


Aviation... 
more widespread dense fog across majority of non-urban terminals 
this morning...back to VFR by 15z. Swath of middle-upper dry air 
swinging across central and eastern Texas going into the afternoon 
allowing sky clear under a weak onshore wind. T/dew point spread may not be as 
small Tuesday morning as atmosphere slowly warms up slightly quicker 
than moisture return. Not anticipating widespread fog formation... 
more spotty IFR br across more rural sites. Increasing cloud cover 
from 24/14z Onward due to a Southern Plains trough dragging in higher 
moisture ahead of it...prob30 of -shra at kiah under weak capping. 31 


&& 


Previous discussion... /issued 439 am CST Monday Nov 23 2009/ 


Discussion... 
areas of fog...some dense...will lift and burn off after sunrise. Another 
dry day is in store for the area as surface high pressure edges off 
to the east and weak south to southeast winds become established. The 
next cold front along with a chance of showers and thunderstorms comes 
through the area tomorrow. Surface high pressure builds in behind the 
front and brings cool nights and mild days through the rest of the week 
with only occasional high clouds moving across the area. Thanksgiving 
will see lows in the 40s and highs in the 60s. The surface high moves 
off to the east over the weekend and allows for an onshore flow to set 
up and strengthen. Expect warming temperatures...increasing clouds...and 
gradually increasing rain chances over the weekend. 42 


Marine... 
quiet maritime conditions through mid-Tuesday. The next front is 
timed to reach the near shore waters sometime Tuesday afternoon. 
Advisory criteria will be met going into that evening as offshore 
sustained winds of 20 kts or greater and 6-9 foot seas last through 
Wednesday afternoon. Offshore flow will persist through this weekend 
as a reinforcing northern high pressure cell comes across the waters 
late Thursday into early Friday. Onshore winds resume Saturday 
afternoon...increasing in strength Sunday before the next frontal 
passage Monday. 31 


&& 


Preliminary point temps/pops... 
College Station (cll) 74 54 66 44 66 / 0 30 30 10 0 
Houston (iah) 74 57 72 45 66 / 0 20 40 10 0 
Galveston (gls) 71 63 73 53 65 / 0 20 50 20 0 


&& 


Hgx watches/warnings/advisories... 
Texas...dense fog advisory until 9 am CST this morning for the following 
zones: Austin...Brazoria...Brazos...Burleson...Chambers... 
Colorado...Fort Bend...Galveston...Grimes...Harris... 
Houston...Jackson...Liberty...Madison...Matagorda... 
Montgomery...Polk...San Jacinto...Trinity...Walker... 
Waller...Washington...Wharton. 


GM...none. 
&& 


$$ 


Discussion...42 
aviation/marine...31