000
AXPZ20 KNHC 011513
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED MAR 01 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1415 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 5N77W 6N85W 4N101W 6N120W 5N140W. 
SCATTERED MODERATE/ISOLATED STRONG WITHIN 120 NM OF THE AXIS 
BETWEEN 80W-85W AND WITHIN 60 NM S OF THE AXIS FROM 86W-89W. 

...DISCUSSION...

MID/UPPER RIDGE EXTENDS FROM UPPER HIGH CENTERED IN THE VICINITY 
OF SE MEXICO/NRN CENTRAL AMERICA WITH A RIDGE AXIS PLANTED ALONG 
13N TO 105W THEN NW TO 30N130W AND ONLY WEAKLY AMPLIFIED FLOW 
ACROSS THE SRN UNITED STATES. MID/UPPER LEVEL TROUGH JUST W OF 
AREA ALONG 147W IS BEGINNING TO MOVE TOWARD THE W PORTION OF THE 
AREA AND BE IN THE AREA FRIDAY PRODUCING A EXTENSIVE AREA OF 
UPPER LEVEL DIFFLUENCE E OF THE HAWAIIAN ISLANDS EXTENDING 
ACROSS 140W WITH WIDESPREAD HIGH CLOUDINESS N OF 7N AND W OF 
120W...ALSO EXTENDING NE ACROSS BAJA CALIFORNIA INTO NW MEXICO. 
INCIDENTALLY...THESE CLOUDS ARE BEING ADVECTED BY THE 
SUBTROPICAL JET WITH WINDS OF 90 TO 130 KT EXTENDING FROM 
23N140W TO 30N126W AND A JET STREAK OF 150+ KT CONTINUING ACROSS 
NW MEXICO NEAR 30N116W. CONFLUENT FLOW INTO THE JET IS HELPING 
TO STRENGTHEN THE SURFACE RIDGE EXTENDING FROM 30N130W TO 
19N117W. THE STRONG GRADIENT IS PRODUCING 20-25 KT WINDS WITHIN 
THE TRADES...AS WELL AS DOWN THE COAST OF BAJA CALIFORNIA.
STRONG SUBSIDENCE DOMINATES THE AREA E OF 115W CAUSING FAIR 
WEATHER UP AND DOWN THE MEXICAN/CENTRAL AMERICAN COAST WITH THE 
ITCZ SUPPRESSED TO S OF 6N. OTHERWISE...ONLY A FEW CLOUDS WITH 
MODERATE/STRONG WINDS MAKING IT ACROSS NICARAGUA AND COSTA RICA 
FROM THE CARIBBEAN WATERS DUE TO STRONG TRADE WIND FLOW IN THAT 
AREA.

$$
WALLACE