000
AXPZ20 KNHC 040918
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN APR 04 2010

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 IS ALONG 5N78W 6N95W 4N140W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION WITHIN 240 NM N OF AXIS FROM FROM 112W-118W.

...DISCUSSION...
A BROAD UPPER LEVEL TROUGH IS OVER THE FAR NW PORTION OF THE 
DISCUSSION AREA WITH WEAK DOWNSTREAM RIDGE WITH AXIS FROM
CENTRAL BAJA CALIFORNIA TO 18N125W. A 90-100 KT JET STREAM
EXTENDS FROM 30N130W ENE TO SOUTHERN CALIFORNIA. MODERATE TO 
STRONG SUBSIDENCE WITH DRY STABLE AIR MASS FROM 15N-27N W OF 
120W. UPPER LEVEL TROUGH EXTENDS FROM THE SOUTHERN GULF OF 
CALIFORNIA SW TO 13N119W. SW FLOW E OF THE TROUGH IS ADVECTING 
PLENTY OF TROPICAL MOISTURE AND ITCZ CONVECTIVE DEBRIS CLOUDS 
ACROSS SOUTHERN MEXICO.

IN THE DEEP TROPICS A WELL DEFINED ANTICYCLONIC CIRCULATION IS 
CENTERED NEAR 8N98W WITH BROAD FLAT RIDGE N INTO MEXICO. UPPER 
LEVEL DIFFLUENT FLOW SE OF THE ANTICYCLONIC CIRCULATION IS  
ENHANCING SCATTERED MODERATE CONVECTION ALONG ITCZ.  

BROAD SURFACE HIGH PRES RIDGE COVERS THE AREA N OF 10N W OF 
110W. BROKEN/OVERCAST STRATOCUMULUS CLOUDS ARE WITHIN RIDGE N 
OF 15N W OF 110W. THE RIDGE IS MAINTAINING 20 KT TRADE WINDS 
FROM 6N-23N W OF 125W. NLY 20 KT WINDS CONTINUE ALONG THE W 
COAST OF BAJA CALIFORNIA. A COUPLE OF SURFACE TROUGHS ARE 
ANALYZED ALONG THE ITCZ. THE FIRST FROM 9N93W TO 3N94W. EARLIER 
CONVECTIVE ACTIVITY ASSOCIATED WITH THE TROUGH HAD DISSIPATED. 
ANOTHER TROUGH EXTENDS FROM 7N121W TO 3N123W. SCATTERED SHOWERS 
AND TSTMS ARE WITHIN 90 NM W OF TROUGH FROM 4N-6N.

GULF OF PAPAGAYO WINDS EXPECTED TO INCREASE TO 20 KT AS HIGH 
PRES BUILDS OVER WRN CARIBBEAN MON AND STRONG EASTERLY BREEZE 
SEEPS THROUGH NICARAGUA MOUNTAINS INTO E PAC.  

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
DGS