000
AXPZ20 KNHC 110312
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN MAR 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 
0245 UTC.

...ITCZ...1N79W 7N87W 3N140W. NO SIG CONVECTION.

ITCZ 
...DISCUSSION...
AT THE LOW LEVELS...SURFACE HIGH PRES IS CENTERED NEAR 32N130W 
RIDGING SE TO 15N110W AND RIDGING SW TO THE HAWAIIAN ISLANDS.

A BAND OF UPPER MOISTURE IS NOTED WITHIN 120 NM EITHER SIDE OF 
LINE 21N119W 32N104W. OTHERWISE...DRY UPPER AIR IS INDICATED N 
OF THE ITCZ W OF 118W.
 AN UPPER ANTICYCLONE IS ESTIMATED NEAR 11N86W WITH A RIDGE 
EXTENDING W TO A CREST AT 11N113W. A MOISTURE PLUME... 
ORIGINATING FROM ITCZ CONVECTION BETWEEN 107W AND 127W...IS 
NOTED WITHIN 360 NM EITHER SIDE OF LINE FROM 12N112W TO 
21N104W...THEN THE PLUME NARROWS SLIGHTLY AS IT TURNS E IN UPPER 
ZONAL FLOW ACROSS THE RIDGE...WITHIN 270 NM EITHER SIDE OF LINE 
22N99W 26N75W. THE UPPER FLOW IS DIFFLUENT S OF 8N E OF 104W 
WITH SLIGHT ENHANCEMENT OF THE NORTHERN HEMISPHERE ITCZ E OF 98W.
A MID TO UPPER SHORTWAVE RIDGE IS AMPLIFYING NE OVER THE NW 
PORTION OF THE DISCUSSION AREA WITH ITS AXIS ALONG 23N140W TO 
BEYOND 32N136W. UPPER MOISTURE IS TRAPPED UNDER THE RIDGE... 
ROUGHLY N OF 28N W OF 125W. IMMEDIATELY TO THE E...A SERIES OF 
SHORTWAVE TROUGHS OVER THE WESTERN CONUS HAVE A MEAN AXIS 
EXTENDING SW INTO THE AREA ALONG 32N112W TO A BASE AT 11N122W. 
AT THE LOW LEVELS...SURFACE HIGH PRES IS CENTERED NEAR 32N130W 
RIDGING SE TO 15N110W AND RIDGING SW TO THE HAWAIIAN ISLANDS.

GAP WINDS....GULF OF TEHUANTEPEC N WINDS 20 KT SEAS LESS THAN 8 
FT..24 HOUR FORECAST FORECAST WINDS LESS THAN 20 KT SEAS LESS 
THAN 8 FT.
.FROM 10N TO 12N E OF 89W INCLUDING GULF OF PAPAGAYO...NE WINDS 
20 TO 25 KT SEAS TO 8 FT.
.24 HOUR FORECAST FROM 9N TO 13N E OF 91W INCLUDING GULF OF 
PAPAGAYO...NE WINDS 20 TO 25 KT SEAS TO 9 FT. 


$$
NELSON