000
AXPZ20 KNHC 260932
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU APR 26 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 
0900 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 2N78W 7N90W 7N110W 6N127W 5N140W. 
SCATTERED MODERATE CONVECTION IS WITHIN 120 NM N OF AXIS BETWEEN 
117W -127W. SIMILAR ACTIVITY IS WITHIN 60 NM N OF AXIS W OF 
137W. WIDELY SCATTERED MODERATE IS WITHIN 90 NM EITHER SIDE OF 
AXIS BETWEEN 108W-117W.

...DISCUSSION...

IN THE MID AND UPPER LEVELS...A SPRAWLING HIGH CENTERED NEAR 
13N109W IS THE MAIN SYNOPTIC FEATURE THIS MORNING. A COMPLEX 
SERIES OF SHORTWAVE TROUGHS AND WEAK RIDGES COVER THE NW 
PORTION. A SWLY JET WITH CORE WINDS OF 100+ KT LIES BETWEEN THE 
STRONG RIDGE AND COMPLEX PATTERN ORIGINATING NEAR 14N130W AND 
EXTENDING NEWD TO N CENTRAL BAJA CALIFORNIA NEAR 29N114W. THIS 
UPPER ENERGY IS TAPPING MOISTURE...MOSTLY IN THE FORM OF BROKEN 
TO OVERCAST MID-HIGH LEVEL CLOUDS...FROM THE ITCZ AND DRAWING IT 
N AND NE WITHIN 360 NM E OF THE JET AXIS. THIS CLOUD DECK 
QUICKLY DRIES OUT E OF 108W ON THE DOWNWARD BRANCH OF THE RIDGE 
WHICH IS LIMITING CONVECTION ALONG THE ITCZ BETWEEN 
90W-108W. THERE ARE A FEW SMALL CLUSTERS OF CONVECTION FORMING E 
OF 90W IN A WEAK DIFFLUENT ZONE BUT NONE OF THESE ARE STRONG OR 
FOCUSED.  

AT THE SFC...A 1032 MB HIGH CENTERED NEAR 34N140W DOMINATES THE 
PATTERN PRODUCING 20 KT NE TRADES ON ITS SRN PERIPHERY AND 
SIMILAR OR SLIGHTLY STRONGER NLY WINDS OFF THE BAJA/CALIFORNIA 
COAST. BOTH OF THESE AREAS ARE FORECAST TO DECREASE OVER THE 
NEXT 48 HOURS AS THE HIGH WEAKENS IN PLACE. TYPICAL SCATTERED 
STRATOCUMULUS CLOUDS ARE EVIDENT ON NIGHT CHANNEL VIS PICTURES 
IN THE N AND NE FLOW REGIME ACROSS A GOOD PORTION OF THE 
SUBTROPICAL EPAC. 

$$
CANGIALOSI