000
AXPZ20 KNHC 290906
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0845 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 4N77W 8N87W 5N105W 9N114W 5N125W 
5N140W. WIDELY SCATTERED SHOWERS/ISOLATED TSTMS WITHIN 60 NM OF 
THE AXIS W OF 120W.

...DISCUSSION...

SUBTROPICAL PACIFIC...
UPPER LEVEL WESTERLIES DOMINATE THE FLOW OVER THE PACIFIC WATERS 
N OF 15N. A SOMEWHAT PROGRESSIVE RIDGE AXIS IS ALIGNED ALONG 
130W WITH A FEW CIRRUS PATCHES TRANSITING TO THE E AND 
EVAPORATING ONCE THEY PASS THE AXIS. STRONGER SUBSIDENCE IS 
LOCATED E OF 120W ACROSS BAJA CALIFORNIA AND NW MEXICO ON THE 
UNDERSIDE OF A LARGE AND LUMBERING MID/UPPER LOW CENTERED OVER 
THE FOUR CORNERS REGION OF THE UNITED STATES. THE SUBSIDENCE AND 
LACK OF LOW-LEVEL MOISTURE IS KEEPING SKIES CLOUD-FREE UP AND 
DOWN THE MEXICAN COAST ALTHOUGH A STRONG 1032 MB HIGH OFF THE 
CALIFORNIA COAST IS PRODUCING BRISK 20-25 KT NORTHERLY WINDS 
ALONG THE BAJA COAST AND OVER THE GULF OF CALIFORNIA. THE TRADES 
ON THE S SIDE OF THE HIGH ARE ALSO IN THE 20-25 KT RANGE BUT ARE 
EXPECTED TO FINALLY LET UP WITHIN THE NEXT 24-48 HRS AS THE HIGH 
WEAKENS BY ABOUT 8 MB.

TROPICAL PACIFIC...
A WEAK MID-LEVEL RIDGE IS CENTERED ALONG 15N AND PRODUCING 
MODERATE/STRONG SUBSIDENCE FROM THE ITCZ TO 25N W OF 110W. A 
BROAD TROUGH OVER THE HAWAIIAN ISLANDS IS LIFTING A PATCH OF 
HIGH CLOUDS OUT OF THE ITCZ AND EWD ACROSS 140W FROM 
5N-22N...SLIGHTLY ERODING THE SUBSIDENT AREA. ANOTHER WEAK UPPER 
TROUGH IS LOCATED ALONG 105W AND IS DOING A SIMILAR 
NUMBER...ADVECTING PATCHES OF UPPER CIRRUS ACROSS SRN MEXICO AND 
MUCH OF CENTRAL AMERICA. AS A RESULT...MUCH OF THE AREA BETWEEN 
THE GULF OF TEHUANTEPEC AND THE NICARAGUA/COSTA RICA BORDER WILL 
BE HAVE PARTLY SUNNY CONDITIONS TODAY DUE TO THE VEIL OF HIGH 
CLOUDS MOVING N.

$$
BERG