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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Saturday
• 
• High: 90 °
• Low: 72 °
• Partly Cloudy

• Sunday
• 
• High: 88 °
• Low: 73 °
• Partly Cloudy

• Monday
• 
• High: 90 °
• Low: 73 °
• Partly Cloudy

• Tuesday
• 
• High: 84 °
• Low: 75 °
• Partly Cloudy

• Wednesday
• 
• High: 84 °
• Low: 73 °
• Chance of T-Storms

Area forecast discussion 
National Weather Service Houston/Galveston Texas 
1204 PM CDT Sat may 18 2013 


Discussion... 
see 18z aviation discussion. 


&& 


Aviation... 
other than reduced visibility at times from smoke...generally VFR 
conds expected through 05z. Moisture beneath the cap will allow 
MVFR ceilings to develop again. Leaned toward persistence once again 
with MVFR ceilings overnight and mxing out between 15-16z. Gradient 
looks tighter on Sunday so will add a gust group. 43 


&& 


Previous discussion... /issued 1023 am CDT Sat may 18 2013/ 


Discussion... 
a high pressure ridge was present across southeast Texas this morning. The 
surface pressure gradient was fairly tight...especially over the 
western counties and coastal marine zones. An analysis of the 12z 
upper air pressure surfaces showed a very warm layer overhead. 
This was confirmed by the large cap in place on the 12z soundings 
at kcrp...klch...and kshv. A fairly deep low-level southern flow 
from the surface to above 850mb was helping to advect smoke from 
southeastern Mexico overhead our area. Further aloft the middle and 
high level ridge was moving overhead the eastern part of the 
state. 


With all this in mind...expect a hazy afternoon to develop as the 
morning cloudiness scatters out. The smoke and haze should help 
generate a bit of a greenhouse effect and warm temperatures up a 
bit over the inland sites. Toward the coast...the onshore flow off 
the cooler Gulf waters will help moderate temperatures. Updates 
were to the wind grids and added an scec to the marine groups 
beyond 20 nm and west of Freeport within 20 nm and including 
Matagorda Bay. 


40 


&& 


Preliminary point temps/pops... 
College Station (cll) 91 72 91 73 91 / 10 10 10 10 10 
Houston (iah) 90 72 90 73 91 / 10 10 10 10 10 
Galveston (gls) 82 73 82 73 82 / 10 10 10 10 10 


&& 


Hgx watches/warnings/advisories... 
Texas...none. 
GM...small craft should exercise caution until 6 PM CDT this evening 
for the following zones: Matagorda Bay...waters from 
Freeport to the Matagorda Ship Channel 20 nm to 60 nm... 
waters from Freeport to the Matagorda Ship Channel out 20 
nm...waters from High Island to Freeport 20 to 60 nm. 


&& 


$$ 


Discussion...40 
aviation/marine...43