000
AXPZ20 KNHC 302127
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON APR 30 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
AXIS 6N78W 9N100W 7N124W 6N140W. SCATTERED MODERATE CONVECTION 
WITHIN 90 NM OF AXIS BETWEEN 96W AND 116W.

...DISCUSSION...
DEEP LAYER CYCLONIC CIRCULATION CENTERED NEAR 30N130W WITH UPPER 
LEVEL TROUGH EXTENDING TO 25N136W. UPPER LEVEL ANTICYCLONE CENTERED 
NEAR 14N116W. BETWEEN THESE TWO CENTERS SUBTROPICAL JET PICKING UP 
WITH MAX WINDS ESTIMATED FROM CLOUD DRIFT TO 100 KT NEAR 21N128W.
THIS PATTERN IS ADVECTING LARGE AMOUNTS OF MOISTURE FROM SW PART OF
AREA TOWARD BAJA CALIFORNIA. UPPER RIDGE EXTENDS EASTWARD OF 110W 
ALONG 9N TO CENTRAL AMERICA. DIFFLUENT FLOW ALOFT NEAR RIDGE AXIS IS 
GENERATING WIDESPREAD LIGHT TO MODERATE CONVECTION ALONG ITCZ. WIDE 
SWATH OF MOISTURE EVIDENT S OF 10N ACROSS ENTIRE DISCUSSION AREA. 

WEAK SURFACE RIDGE EXTENDS SE TO 20N110W. LACK OF A STRONG RIDGE IS 
KEEPING TRADES IN A GENTLE TO MODERATE RANGE. VERY LITTLE CHANGE TO 
CURRENT PATTERN EXPECTED THROUGH 36 HOURS. A WEAK FRONT ENTERING NW 
PORTION IN ABOUT 48 HOURS WILL PUSH SWELLS UP TO 11-12 FT THU NIGHT 
ALONG WITH A SLIGHT INCREASE IN TRADE WINDS W OF 130W.  

$$
MUNDELL