000
AXPZ20 KNHC 120323
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED APR 11 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...ITCZ...
AXIS 8N83W 8N103W 4N120W 3N140W. SCATTERED MODERATE CONVECTION FROM 
5N TO 8N BETWEEN 88W AND 95W.

...DISCUSSION...
PROGRESSIVE PATTERN N OF 20N CONTINUES. SATELLITE IMAGERY SHOWS A 
SHORT WAVE TROUGH INTENSIFYING ALONG 108W AS AN UPPER RIDGE BUILDS 
UPSTREAM BETWEEN 120W AND 130W. TROUGH IS SPLITTING THE SUBTROPICAL 
JET INTO A NORTHERN BRANCH EXTENDING FROM 16N138W TO 23N125W TO SRN 
BAJA...AND SOUTHERN BRANCH FROM 16N110W ACROSS SRN MEXICO INTO GULF 
OF MEXICO. FURTHER SOUTH A WEAK UPPER LEVEL RIDGE OVERLIES THE ITCZ 
ROUGHLY ALONG 7-8N E OF 105W.

AT THE SURFACE...BROAD HIGH PRESSURE RIDGE EXTENDS FROM 1030 MB HIGH 
NEAR 34N138W TO 17N110W. HEAT LOW NEAR LAS VEGAS NV CREATING TIGHT
PRES GRADIENT ALONG COAST OF SRN CALIF AND NRN BAJA. RESULTING STRONG
NW WINDS GENERATING LARGE SWELLS 10-15 FT NEAR SAN DIEGO...WHICH WILL
CONTINUE TO PROPAGATE INTO FAR NE PORTION OF DISCUSSION AREA...THEN 
DAMPEN OUT AS THEY MOVE FARTHER SOUTH...W OF BAJA PENINSULA. THE HIGH
PRES N OF THE AREA CENTERED NEAR 34N140W IS ALSO PRODUCING ENHANCED 
TRADE WINDS W OF 125W...WHICH WILL GRADUALLY WEAKEN IN ABOUT 48-60  
HOURS AS A LOW PRES TROUGH MOVES INTO THE NW PORTION OF THE AREA.

$$
MUNDELL