000
AXPZ20 KNHC 300905
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED MAY 30 2007

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.

...SPECIAL FEATURES...
TROPICAL DEPRESSION ALVIN IS CENTERED NEAR 13.0N 114.6W AT 0900 
UTC MOVING WNW OR 285 DEG AT 4 KT. ESTIMATED MINIMUM CENTRAL 
PRESSURE IS 1005 MB. MAXIMUM SUSTAINED WIND SPEED IS 30 KT WITH 
GUSTS TO 40 KT. CONVECTION WITH ALVIN DECREASED CONSIDERABLY.

TROPICAL DEPRESSION TWO-E CENTERED NEAR 14.1N 97.4W AT 0900 UTC 
AND IS NEARLY STATIONARY. ESTIMATED MINIMUM CENTRAL PRESSURE IS 
1006 MB. MAXIMUM SUSTAINED WIND SPEED IS 30 KT WITH GUSTS TO 40 
KT. NUMEROUS MODERATE TO STRONG CONVECTION IS NOTED FROM 13N-15N 
BETWEEN 96W-99W. SEE LATEST NHC FORECAST/ADVISORY UNDER 
AWIPS/WMO HEADERS MIATCMEP2/WTPZ22 KNHC FOR MORE DETAILS.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 12N86W 12N100W 11N105W 7N125W 
7N140W. SCATTERED TO NUMEROUS MODERATE TO STRONG STRONG 
CONVECTION WITHIN 120 NM N OF AXIS E OF 91W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION WITHIN 180 NM S OF AXIS FROM 101W TO 
108W.

...DISCUSSION...
AN UPPER ANTICYCLONE CENTERED NEAR 16N112W. A RIDGE EXTENDS SW 
OVER TROPICAL STORM ALVIN TO 10N140W. AN UPPER RIDGE ALSO 
EXTENDS N FROM CIRCULATION ACROSS THE BAJA PENINSULA INTO THE SW 
U.S.. AN UPPER CYCLONE HAS DEVELOPED NW OF THE RIDGE NEAR 
312N125W AND IS MOVING N WITH A TRAILING AN UPPER TROUGH SW TO 
BEYOND 18N140W. THIS TROUGH IS ACCOMPANIED BY VERY DRY UPPER 
AIR...BUT SOME UPPER MOISTURE IS SPREADING EASTWARD OVER THE 
DISCUSSION AREA TO THE W OF LINE 32N133W TO 19N140W. AN UPPER 
MOISTURE PLUME IS SQUEEZED BETWEEN THE TROUGH AND THE RIDGE 
ROUGHLY ALONG THE W PERIPHERY OF THE RIDGE...WITHIN 150 NM 
EITHER SIDE OF LINE 11N140W 24N125W THE CENTRAL BAJA PENINSULA.

AN UPPER RIDGE EXTENDS E FROM THE ANTICYCLONE AT 16N112W OVER 
THE TROPICAL DEPRESSION TWO-E TO THE SW CARIBBEAN. ASSOCIATED 
UPPER DIFFLUENCE IS ENHANCING CONVECTION NEAR THE DEPRESSION AND 
ALONG THE COAST OF NICARAGUA AND EL SALVADOR.

SURFACE RIDGE EXTENDS INTO DISCUSSION AREA ALONG 34N133W 19N105W.

$$
DGS