000
AXPZ20 KNHC 261520
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI SEP 26 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.

...TROPICAL WAVES...
TROPICAL WAVE N OF 7N ALONG 87W MOVING W 10 KT. SCATTERED 
MODERATE CONVECTION W OF THE WAVE OVER GUATEMALA AND BELIZE.

TROPICAL WAVE N OF 8N ALONG 98W MOVING W 10 KT. ISOLATED SHOWERS 
ALONG THE WAVE EARLIER HAVE DISSIPATED.

TROPICAL WAVE FROM 6N TO 17N ALONG 110W MOVING W 10 KT. NO 
CONVECTION ASSOCIATED WITH THE WAVE.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 11N86W 12N105W 9N125W 10N140W. 
SCATTERED MODERATE CONVECTION WITHIN 60 NM S OF AXIS FROM 119W 
TO 122W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 60 
NM EITHER SIDE OF AXIS FROM 124W TO 127W AND WITHIN 180 NM N OF 
AXIS FROM 129W-134W.

...DISCUSSION...
MID/UPPER LEVEL TROUGH WITH AXIS FROM 32N126W TO 21N135W WITH A 
WEAK RIDGE BUILDING NW OF THE TROUGH. MODERATE TO STRONG 
SUBSIDENCE WITH DRY AIR STABLE AIR AT THE MIDDLE AND UPPER 
LEVELS OF THE ATMOSPHERE COVERS THE DISCUSSION AREA N OF 20N
W OF 110W. MID/UPPER LEVEL ANTICYCLONIC CIRCULATION CENTERED 
JUST SW OF THE BAJA PENINSULA NEAR 23N111W. A RIDGE EXTENDS 
FROM THE CIRCULATION N ACROSS NW MEXICO INTO NEW MEXICO. ANOTHER 
RIDGE EXTENDS FROM THE ANTICYLONE SW TO 14N134W. UPPER LEVEL 
DIFFLUENT  FLOW SE OF THE ANTICYCLONIC CIRCULATION IS ENHANCING 
NUMEROUS CONVECTIVE ACTIVITY WITHIN 200 NM  OF THE COAST OF 
MEXICO FROM 16N-22N. A MID LEVEL INVERTED TROUGH EXTENDS FROM 
NICARAGUA TO THE EQUATOR AT 87W. NUMEROUS MODERATE ISOLATED 
STRONG SHOWERS AND TSTMS ARE WITHIN 200 NM OF THE COAST OF 
COLOMBIA FROM 2N-7N.

A 1009 MB SURFACE LOW PRES IS CENTERED NEAR 15N116W DRIFTING NW.
SCATTERED TO NUMEROUS STRONG SHOWERS AND TSTMS ARE WITHIN 160 NM 
OVER THE NW QUADRANT OF THE LOW. ANOTHER LOW PRES IS ANALYZED 
ALONG THE ITCZ NEAR 11N134W IS NEARLY STATIONARY. SCATTERED 
MODERATE TO STRONG CONVECTION E OF THE LOW ALONG THE ITCZ 
DESCRIBED ABOVE. OTHERWISE BROAD SURFACE HIGH PRES RIDGE COVERS 
THE AREA N OF 20N W OF 120W. BROKEN TO MOSTLY OVERCAST 
STRATOCUMULUS CLOUDS BLANKET THE AREA WITHIN THE RIDGE. 

$$
DGS