000
AXPZ20 KNHC 300922
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON AUG 30 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 15N92W 14N97W 12N115W 10N140W. NUMEROUS MODERATE 
TO STRONG CONVECTION WITHIN 200 NM S OF AXIS FROM 97W-117W. 
SCATTERED MODERATE TO STRONG CONVECTION WITHIN 60 NM S OF AXIS 
FROM 120W-125W. SCATTERED MODERATE ISOLATED STRONG WITHIN 30 NM 
EITHER SIDE OF AXIS FROM 130W-138W.

...DISCUSSION...
A BROAD WEAK UPPER LEVEL RIDGE OVER THE FAR NW PORTION OF THE 
DISCUSSION AREA IS N OF 22N W OF 122W. A MID/UPPER LEVEL TROUGH 
ALONG THE WEST COAST OF THE U.S. EXTENDS S ALONG THE BAJA 
PENINSULA TO 22N116W. MODERATE TO STRONG SUBSIDENCE WITH DRY
STABLE AIR AT THE MIDDLE AND UPPER LEVELS COVERS THE AREA N OF 
THE ITCZ W OF 115W. UPPER LEVEL RIDGE EXTENDS FROM AN 
ANTICYCLONIC CIRCULATION OVER NE MEXICO TO 22N107W 16N125W. 
UPPER LEVEL DIFFLUENCE SE OF THE RIDGE IS ENHANCING ITCZ 
CONVECTION FROM 97W-117W. ABUNDANT DEEP LAYER TROPICAL 
MOISTURE COVERS THE SE PORTION OF THE DISCUSSION AREA S OF 20N E 
OF 100W.

SURFACE 1006 MB LOW THE REMNANTS OF FRANK IS CENTERED NEAR 
21N111W IS FORECAST TO DISSIPATE LATER TODAY. ANOTHER LOW IS 
ANALYZED ALONG THE ITCZ...1008 MB...NEAR 13N99W. THE LOW IS 
MOVING SLOWLY TO THE W. SW WINDS 20-25 KT ARE FROM 5N-15N 
BETWEEN 90W-110W AND FROM 5N-10N BETWEEN 110W-120W. THESE 
CONDITIONS ARE EXPECTED TO CONTINUE THROUGH THE NEXT 48 HOURS.
OTHERWISE SURFACE RIDGE COVERS THE AREA N OF 15N W OF 120W. 

CROSS-EQUATORIAL LONG PERIOD SWELL IS MOVING NORTHWARD ACROSS 
THE AREA E OF 110W. THESE SWELLS HAVE REACHED THE COAST OF 
CENTRAL AMERICA AND SOUTHERN MEXICO.

$$
DGS