000
AXPZ20 KNHC 151502
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1705 UTC TUE APR 15 2008

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
ITCZ CENTERED ALONG 2N77W 9N105W 5N125W 4N140W. SCATTERED 
MODERATE TO STRONG FROM 9N TO 15N BETWEEN 100W AND 110W AND 
WITHIN 90 NM N OF AXIS FROM 112W TO 115W.

...DISCUSSION...
UPPER LEVEL TROUGH MOVING INTO THE FAR NW PORTION OF THE 
DISCUSSION AREA FROM 32N134W TO WELL DEFINED CYCLONIC 
CIRCULATION JUST W OF THE AREA NEAR 26N141W. SW FLOW AHEAD OF 
THE TROUGH IS ADVECTING SOME HIGH LEVEL TROPICAL MOISTURE NWD.
MID/UPPER LEVEL RIDGE EXTENDS FROM THE SOUTHERN TIP OF THE BAJA
PENINSULA NNE ACROSS THE GULF OF CALIFORNIA INTO SE ARIZONA.
MODERATE TO STRONG SUBSIDENCE WITHIN THE RIDGE N OF 24N BETWEEN
105W-120W...WITH DRY AIR AND MOSTLY CLEAR SKIES OVER LAND AND 
THE GULF OF CALIFORNIA AND BROKEN/OVERCAST STRATUS CLOUDS OVER 
THE PACIFIC. LARGE UPPER LEVEL ANTICYCLONIC CIRCULATION IS 
CENTERED OVER SOUTHERN NICARAGUA WITH RIDGE EXTENDING NW FROM
THE CIRCULATION ALONG THE W COAST OF MEXICO TO 18N103W.
ANTICYCLONIC FLOW AROUND THE RIDGE IS ADVECTING HIGH LEVEL
MOISTURE FROM THE ITCZ INTO SOUTHERN MEXICO AND GUATEMALA.

TIGHT PRES GRADIENT OVER SOUTHERN MEXICO CONTINUES TO SUPPORT
GALE FORCE WINDS IN THE GULF OF TEHUANTEPEC. OTHERWISE SURFACE 
HIGH PRES SURFACE COVERS THE AREA N OF 15N W OF 115W.

$$
DGS