000
AXPZ20 KNHC 080917
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE JUN 08 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.

...TROPICAL WAVE...
TROPICAL WAVE FROM 6N-12N ALONG 89W MOVING W 10-15 KT. SCATTERED 
SHOWERS AND TSTMS PREVIOUSLY WITH THE WAVE HAVE DISSIPATED.

...ITCZ...
AXIS IS ALONG 8N79W 9N90W 8N95W 11N105W 7N120W 10N130W 6N140W. 
SCATTERED MODERATE TO STRONG CONVECTION WITHIN 90 NM N AND 60 NM 
S OF AXIS FROM 90W-86W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION WITHIN 90 NM N OF AXIS FROM 128W-130W AND WITHIN 120 
NM S OF AXIS FROM 133W-135W.

...DISCUSSION...
UPPER LEVEL RIDGE OVER THE NW PORTION OF THE DISCUSSION AREA 
EXTENDS FROM 32N125W TO AN ANTICYCLONIC CIRCULATION JUST W OF 
THE AREA NEAR 28N141W. SOME HIGH LEVEL MOISTURE IS MOVING OVER 
THE N SIDE OF THE RIDGE. AN UPPER LEVEL TROUGH EXTENDS FROM THE N
COAST OF BAJA CALIFORNIA TO A CYCLONIC CIRCULATION NEAR 23N127W 
THEN CONTINUES TO 17N140W. MODERATE TO STRONG SUBSIDENCE AND DRY 
AND STABLE AIR AT THE MIDDLE TO UPPER LEVELS WITHIN 240 NM NW OF 
THE TROUGH AXIS. SCATTERED TO BROKEN CIRRUS CLOUDS ARE WITHIN 
300 NM SE OF THE TROUGH FROM 20N-27N. DOWNSTREAM UPPER LEVEL 
RIDGE EXTENDS FROM NW MEXICO ACROSS CENTRAL BAJA CALIFORNIA TO 
25N115W.

A BROAD UPPER LEVEL RIDGE DOMINATES THE DEEP TROPICS WITH AN 
ANTICYCLONIC CIRCULATION CENTERED NEAR 12N127W. THE RIDGE 
EXTENDS EASTWARD TO ANOTHER ANTICYCLONIC CIRCULATION NEAR 
15N105W TO YET ANOTHER ANTICYCLONIC CIRCULATION OVER THE YUCATAN 
CHANNEL. ABUNDANT TROPICAL MOISTURE IS S OF THE RIDGE AXIS.

SURFACE HIGH PRES RIDGE COVERS THE AREA N OF 15N W OF 115W. 
TROUGH MOVING S OF THE RIDGE WILL TIGHTEN THE PRES GRADIENT 
RESULTING IN AN INCREASE IN THE TRADES OVER THE NEXT FEW DAYS. A 
COUPLE OF SURFACE TROUGHS ARE ANALYZED ALONG THE ITCZ. THE FIRST 
EXTENDS FROM 14N103W TO 8N106W. SCATTERED SHOWERS ARE ALONG THE 
TROUGH AXIS. ANOTHER TROUGH EXTENDS FROM 12N127W TO 8N133W. 
SCATTERED SHOWERS ARE WITHIN 60 NM W OF TROUGH AXIS FROM 
10N-12W. A 1012 MB LOW OFF THE COAST OF COSTA RICA NEAR 9N84W. A 
FEW SHOWERS AND TSTMS ARE WITHIN 150 NM NW OF THE LOW CENTER.

MIXED CROSS-EQUATORIAL SE AND SW SWELL OF 8-9 FT COVERS THE 
SOUTHERN PORTION OF THE DISCUSSION AREA S OF 8N BETWEEN 
80W-105W. THIS SWELL IS EXPECTED TO SUBSIDE GRADUALLY THROUGH 
LATE WED. 

$$
DGS