000
AXPZ20 KNHC 290344
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC THUD MAR 29 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 
0345 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 6N78W 7N100W 7N110W 6N120W 5N130W 
4N140W. SCATTERED MODERATE/ISOLATED STRONG CONVECTION IS WITHIN 
60 NM OF THE AXIS BETWEEN 121W-125W.

...DISCUSSION...

MID/UPPER LEVEL RIDGE IS OVER THE W PORTION OF THE DISCUSSION 
WITH ITS AXIS ROUGHLY ALONG 130W. ASSOCIATED ANTICYCLONIC FLOW 
COVERS THE AREA W OF 121W WITH MODERATE TO STRONG SUBSIDENCE AND 
DRY AIR EVIDENT ON SATELLITE WATER VAPOR IMAGERY FROM 9N-26N W OF
115W...AND ALSO NW OF LINE 20N105W TO 10N117W. A MID/UPPER LEVEL 
TROUGH EXTENDS FROM A STRONG MID/UPPER LEVEL CYCLONIC OVER THE 
CIRCULATION OVER THE SW U.S. SWD ACROSS GULF OF CALIFORNIA TO 
19N109W TO 15N107W. A JET STREAM BRANCH WITH MAXIMUM WINDS IN 
THE RANGE 70-95W KT ROUNDS THE BASE OF THE TROUGH NEWD TO ACROSS
CENTRAL MEXICO CALIFORNIA NEWD TO THE WRN GULF OF MEXICO.

A MID/UPPER LEVEL TROUGH IS NOTED THROUGH 12N103W SSE TO 
6N95.5W. THE UPPER LEVEL FLOW PATTERN IS DIFFLUENT SE OF THE 
FIRST MID/UPPER LEVEL TROUGH MENTIONED ABOVE...BUT BECOMES 
SOMEWHAT CONFLUENT ACROSS THE NRN PORTION OF THE SECOND TROUGH 
AS IT CAUGHT IN BETWEEN SW FLOW TO ITS N WITH THE JET STREAM AND 
ANTICYCLONIC FLOW TO ITS SE ASSOCIATED WITH A MID/UPPER LEVEL 
RIDGE THAT EXTENDS ALONG THE CENTRAL MEXICAN COAST FROM PANAMA 
TO NRN COSTA RICA AND TO ACROSS GUATEMALA AND SE MEXICO. 
MID/UPPER ANTICYCLONIC FLOW COVERS THE ERN PART OF THE PACIFIC N 
OF 5N E OF 99W. ITCZ MID/UPPER LEVEL MOISTURE IS LIFTING NWD 
AROUND THE WRN PERIPHERY OF THE RIDGE.

MOSTLY MODERATE SUBSIDENCE AND DRY AIR IS NOTED S OF THE ITCZ
E OF 105W.

AT THE SURFACE...FAIRLY STRONG RIDGE AXIS EXTENDS FROM 32N126W 
THROUGH 26N120W TO 22N115W. HIGH PRES COVERS THE AREA N OF 15N 
AND W OF 112W. BROKEN TO OVERCAST MOSTLY STRATOCUMULUS CLOUDS 
MOVING WSW WITH POSSIBLE ISOLATED SHOWERS ARE SEEN N OF 14N W OF 
128W...AND FROM 14N-20N BETWEEN 114W-128W.

$$
AGUIRRE