000
AXPZ20 KNHC 230912
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON APR 23 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0800 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 2N79W 7N90W 6N108W 3N121W  2N140W. 
SCATTERED MODERATE FROM 1N TO 3N BETWEEN 130W AND 132W.

...DISCUSSION...
UPPER LEVEL TROUGHING EXTENDS SWD FROM VERTICALLY STACKED LOW 
PRES OVER THE SW U.S. ACROSS BAJA TO A WEAK ELONGATED UPPER LOW 
NEAR 25N114W. THIS TROUGHING IS GETTING PUSHED INLAND BY A LARGE 
AMPLIFIED MID TO UPPER LEVEL RIDGE CENTERED NEAR 30N139W. TO THE 
S OF THIS WELL-DEFINED RIDGE LIES A E-W ORIENTED TROUGH ALONG 
19N W OF 123W. AN UPPER LEVEL JET ORIGINATES BETWEEN THIS E-W 
TROUGH AND UPPER RIDGING TO ITS S AND THEN EXTENDS NEWD INTO 
MEXICO ALONG 15N140W 17N121W 27N112W. ABUNDANT MOISTURE IS BEING 
TRANSPORTED WITHIN 240 NM E/SE OF THE JET AXIS. MOST OF THIS 
MOISTURE IS LIKELY IN THE FORM OF A BROKEN TO OVERCAST CIRRUS 
DECK...BUT ISOLATED TO SCATTERED SHOWERS ARE POSSIBLE ESP NEAR 
AND OVER CENTRAL BAJA WHERE THE JET IS AMPLIFIED BY THE UPPER 
SHORTWAVE/LOW MENTIONED ABOVE. FARTHER E...THE WEAK UPPER 
PATTERN IS NOT FAVORING SIGNIFICANT CONVECTION ALONG THE ITCZ.

AT THE SFC...A 1026 MB HIGH PRES CENTER ANALYZED AT 28N145W WITH 
RIDGE EXTENDING ESE THROUGH 21N115W CONTROLS THE PATTERN. THIS  
HIGH PRES MAINTAINS MODERATE NE TRADES. NE TO E WINDS ARE 
EXPECTED TO INCREASE OVER THE GULF OF PAPAGAYO WITHIN NEXT 6-12 
HRS AND PERSIST FOR A COUPLE OF DAYS.

$$
CANGIALOSI