477 
axpz20 knhc 020350
twdep 
Tropical weather discussion
NWS TPC/National Hurricane Center Miami FL
0405 UTC Tue Dec 02 2008
Tropical weather discussion for the eastern Pacific Ocean
from the Equator to 32n...east of 140w. 
Based on 0000 UTC surface analysis and satellite imagery through 
0300 UTC.
...ITCZ...
intertropical convergence zone along 07n81w to 068n88w to 
10n109w to 08n128w to 07n140w.  No significant convection.
...Discussion...
broad upper level ridge covers wrn portion of basin W of 113w 
advecting moisture into basin N of 08n with ITCZ used for 
isolated decreasing deep convection W of 134w.  Large amplitude 
upper level trough cover remainder E pac with moderate to strong 
subsidence and very dry air mass limiting cloud vertical 
development throughout.
At the surface...
high pres center 1025 mb at 31n134w has ridge extend se to 
13n112w maintaining strong trade winds from 10n-20n W of 128w.
  
High pres center over Gulf of Mexico forces cold air across 
isthmus and Gulf of Tehuantepec starting to be felt tonight and 
reaching gale force Tue for short period.  High pres over Gulf 
of Mexico moves E quickly and gale event dies by Tue night... 
although strong northerlies linger till Wed.    
As high pres enters wrn Caribbean...Gulf of papagayo start 
feeling NE winds spilling across mountain passes and reach short 
of gale force by Wed. 
$$
Wally Barnes