000
AXPZ20 KNHC 271513
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC THU APR 27 2006

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 7N77W 9N100W 7N120W 4N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 120 NM N OF 
AXIS FROM 129W TO 137W AND 60 NM EITHER SIDE OF AXIS FROM 137W 
TO 140W.

...DISCUSSION...
MID/UPPER LEVEL LOW IS CENTERED IS ALONG THE SRN CA/BAJA 
CALIFORNIA BORDER MOVING ESE 10-15 KT. MID/UPPER LEVEL TROUGH 
EXTENDS FROM THE LOW SW TO NEAR 20N135W. A RIDGE IS BUILDING 
OVER THE FAR W PORTION OF THE AREA BEHIND THE TROUGH. CONFLUENCE 
AT THE BASE OF THE TROUGH IS PRODUCING A LARGE AREA OF STRONG 
SUBSIDENCE FROM 15N-26N W OF 120W. SATELLITE DERIVED WINDS 
INDICATE A 95-105 KT SUBTROPICAL JET SE OF THE TROUGH EXTENDING 
FROM 18N124W ACROSS THE CENTRAL BAJA PENINSULA AND INTO NW 
MEXICO. HIGH LEVEL MOISTURE EXTENDS ABUT 600 NM SE OF THE JET. 
NEARLY STATIONARY UPPER LEVEL ANTICYCLONIC CIRCULATION IS NEAR 
13N106W WITH RIDGE EXTENDING NE INTO MEXICO.

AN UPPER LEVEL CYCLONIC SHEAR AXIS EXTENDS FROM HONDURAS SW TO 
5N95W WITH DRY N/NE FLOW PLUNGING FROM THE GULF OF MEXICO SWD 
INTO THE PACIFIC...AND MOIST AIR CIRCULATING AROUND AN UPPER 
RIDGE AXIS FROM COLOMBIA TO COSTA RICA AND NICARAGUA.

SURFACE HIGH PRES COVERS THE PACIFIC N OF 10N W OF 110W...WITH 
BROKEN TO OVERCAST STRATOCUMULUS N OF 15N W OF 120W.

$$
DGS