000
AXPZ20 KNHC 290915
TWDEP 

TROPICAL WEATHER DISCUSSION      
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN MAR 29 2009

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 0900 UTC.

...ITCZ...
AXIS WAS ALONG 9N83W 2N105W 4N125W 5N140W. NO SIGNIFICANT 
CONVECTION.

...DISCUSSION...
MIDDLE TO UPPER LEVEL CYCLONIC CIRCULATION IS OVER THE NW 
PORTION OF THE DISCUSSION AREA CENTERED NEAR 26N138W...WITH 
CYCLONIC FLOW N OF 20N W OF 135W. EARLIER SHOWERS N OF THE 
CIRCULATION HAVE DISSIPATED. DOWNSTREAM UPPER LEVEL RIDGE 
EXTENDS FROM SOUTHERN ARIZONA ACROSS THE GULF OF CALIFORNIA.
MODERATE TO STRONG SUBSIDENCE COVERS MOST OF MEXICO. A DEEP 
LAYER TROUGH EXTENDS FROM THE WESTERN GULF OF MEXICO THROUGH 
SOUTHERN MEXICO TO THE GULF OF TEHUANTEPEC. ASSOCIATED 
STATIONARY FRONT IS ALONG THE E SLOPE OF THE SIERRA MADRE 
ORIENTAL MOUNTAIN RANGE S OF 22N. OVERCAST LOW TOP CLOUDS WITH 
SCATTERED SHOWERS ARE N OF THE FRONT.

IN THE DEEP TROPICS A COUPLE OF ANTICYCLONIC CIRCULATIONS 
DOMINATE MUCH OF THE ARE...ONE CENTERED NEAR 2N107W AND ANOTHER 
NEAR 9N121W. A NARROW TROUGH SEPARATES THE TWO ANTICYCLONES. 
MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE AIR IS S OF 15N E 
OF 120W.

SURFACE RIDGE WITH AXIS FROM 32N140W TO 14N106W. BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS ARE N OF 17N W OF 120W.

$$
DGS