000
AXPZ20 KNHC 090950
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC SUN JUN 09 2013

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS FROM 10N85W TO 10N98W TO 14N111W TO 09N120W
TO 08N130W TO 07N136W THEN ITCZ TO BEYOND 07N140W.  SCATTERED 
MODERATE ISOLATED STRONG CONVECTION WITHIN 240 NM S OF AXIS
E OF 105W AND WITHIN 60 NM OF AXIS FROM 118W TO 130W.

...DISCUSSION...
SUBTLE UPPER LEVEL TROUGH ALONG 126W N OF 16N SPLIT E-W ORIENTED
RIDGE ALONG 18N INTO TWO INDEPENDENT ANTICYCLONES...ONE AT
18N124W AND A SECOND AT 17N141W.  RIDGE MAINTAINS CENTRAL E PAC
IN SUBSIDING DRY AND STABLE ALOFT WITH LOW LEVEL STRATIFIED 
CLOUDS N OF 16N W OF 115W. DEEPENING TROUGH ALOFT ALONG 100W
BRINGS MOISTURE PLUME INTO MEXICO AND CENTRAL AMERICA.  THIRD
ANTICYCLONE...THIS ONE OVER GUATEMALA...PROMPTS MODERATE OUTFLOW
TO ADVECTED MOISTURE ACROSS CENTRAL AMERICA AND MOVES IT INTO
EASTERN PAC ALONG MONSOON TROUGH.    
              
MODERATE UPPER LEVEL DIFFLUENCE BETWEEN DEEPENING TROUGH AND
UPSTREAM RIDGE OVER MONSOON TROUGH ENHANCES SCATTERED MODERATE
ISOLATED STRONG CONVECTION ALONG AXIS.

...ELSEWHERE AT THE LOWER LEVELS...
STRONG AND BROAD HIGH PRES CENTER 1037 MB AT 45N155W PRESSES
AGAINST COAST OF NORTHERN CALIFORNIA PROMPTING GALE FORCE WINDS.
BY SUN NIGHT...A FRESH N-NE BREEZE INTRUDE S ACROSS 32N INTO E 
PAC ALONG WITH 8-10 FT.  WEAK 1010 MB SURFACE LOW PRES OFF THE 
COAST OF NORTHERN BAJA CALIFORNIA AND ITS ATTENDANT TROUGH N OF
27N ALONG 124W PROMPT FRESH TO STRONG NE WINDS ACROSS 30N W OF
TROUGH AXIS.

$$
WALLY BARNES