000
AXPZ20 KNHC 270333
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE MAR 27 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 00 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
025 UTC.

...ITCZ...
ITCZ AXIS ALONG THE LINE...4N77W  7N82W  5N109W  6N122W 6N140W.  
SCATTERED MODERATE WITHIN 60 NM OF AXIS FROM 119W TO 136W.

...DISCUSSION...
MID/ UPPER TROUGH EXTEND FROM 32N101 TO 17N120W TO 11140W WITH 
VERY DRY SUBSIDING AIR MASS WITHIN 360 NM NW OF AXIS.  UPSTREAM 
FLATTENED RIDGE CREST IMPORTS MODERATE AMOUNTS OF MOISTURE N OF 
25N W OF 112W.  JET CORE HEADING NE WITHIN 180 NM SE OF AXIS HAS 
WEAKENED CONSIDERABLY DOWN TO 90 KT BUT REMAINS AN ADVECTION 
FORCE WITH WIDE TROPICAL MOISTURE PLUME PART OF TROUGH MOVED 
OVER MEXICO INTO NW GULF OF MEXICO.  REMAINDER E PAC E OF 107W 
KEPT VERY DRY ALOFT AS UPPER LEVEL EXTENSION OF ATLC RIDGE 
MAINTAINS STRONG SUBSIDENCE OVER AREA.
 
AT THE SURFACE...
WEAK COLD FRONT APPROACHES NW CORNER OF E PAC SQUEEZING REMAINS 
OF SURFACE RIDGE AGAINST CALIFORNIA COAST INCREASING N-NW WINDS 
ALONG COASTAL WATERS INCLUDING GULF OF CALIFORNIA N OF 25N.  

$$
WALLY BARNES