000
AXPZ20 KNHC 100916
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU APR 10 2008

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0845 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 8N77W 5N87W 6N96W 9N106W 3N123W 
5N140W. SCATTERED MODERATE/STRONG CONVECTION WITHIN 150 NM OF 
AXIS BETWEEN 78W-88W. SCATTERED MODERATE FROM 3N-7N BETWEEN 
94W-103W. SCATTERED MODERATE/ISOLATED STRONG WITHIN 120 NM OF 
AXIS BETWEEN 108W-134W.

...DISCUSSION...

W OF 110W...
A 1031 MB HIGH IS CENTERED ABOUT 800 NM W OF CALIFORNIA NEAR 
38N140W WITH THE ASSOCIATED SURFACE RIDGE CONTINUING SE OFF THE 
COAST OF BAJA CALIFORNIA TO NEAR 15N110W. FRESH TO STRONG TRADES 
LIE ON THE SOUTHERN PERIPHERY OF THE RIDGE MAINLY W OF 120W... 
AND FRESH NORTHWESTERLY FLOW ALSO LIES OFF THE BAJA COAST TO THE 
N OF THE RIDGE AXIS. NORTHWESTERLY SWELLS OF 8-11 FT HAVE MOVED 
DOWN THE BAJA COAST AND ARE EXPECTED TO SUBSIDE OVER THE NEXT 
FEW DAYS. IN THE UPPER LEVELS...A TROUGH/CYCLONIC SHEAR AXIS 
ORIGINATES FROM A SHARP TROUGH OVER THE ROCKY MOUNTAINS AND LIES 
FROM 28N110W TO 26N125W THEN TO 29N140W WITH MODERATE/STRONG 
SUBSIDENCE N OF 23N. INCREASED HIGH CLOUDINESS IS LOCATED S OF 
23N DUE TO OUTFLOW FROM A CLOSED UPPER LOW SW OF HAWAII. AN 
UPPER HIGH IS CENTERED NEAR 11N141W AND IS PRODUCING NW/N FLOW 
ALOFT W OF 122W. ELSEWHERE A STATIONARY TROUGH IS LOCATED ALONG 
120W AND THE SOUTHERLY FLOW TO ITS E HAS PULLED THE ITCZ 
NORTHWARD BETWEEN 100W-115W. A STREAM OF HIGH CIRRUS EXTENDS NE 
OF THE TROUGH TO THE MOUTH OF THE GULF OF CALIFORNIA AND INLAND 
NEAR MAZATLAN.

E OF 110W...
A SHARP UPPER TROUGH OVER THE ROCKY MOUNTAINS EXTENDS SWD INTO 
NORTHERN MEXICO WITH A THIN BAND OF HIGH CLOUDS LYING ACROSS THE 
STATES OF SINALOA...DURANGO...COAHUILA...AND NUEVO LEON. 
ELSEWHERE A SPRAWLING UPPER HIGH IS CENTERED OVER THE YUCATAN 
PENINSULA WITH MODERATE/STRONG SUBSIDENCE COVERING MUCH OF SE 
MEXICO...NW CENTRAL AMERICA...AND THE ADJACENT WATERS. A SHEAR 
AXIS EXTENDS FROM NICARAGUA TO AN UPPER LOW NEAR 5N106W AND 
SERVES AS A DEMARCATION BETWEEN DRIER AIR TO THE N AND MORE 
ABUNDANT MOISTURE OVER THE DEEP TROPICS. SURFACE WINDS ARE 
GENTLE TO MODERATE ACROSS THE REGION AND THE ITCZ IS RATHER 
ILL-DEFINED...ALTHOUGH THERE IS STILL ENOUGH LOW-LEVEL 
CONVERGENCE FOR SCATTERED CONVECTION TO FORM NEAR THE AXIS. THE 
STRONGEST AND MOST WIDESPREAD ACTIVITY IS LOCATED NEAR AND SW OF 
THE COASTS OF PANAMA AND COSTA RICA.

$$
BERG