000
AXPZ20 KNHC 212115
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SAT AUG 21 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN
FROM THE EQUATOR TO 32N...EAST OF 140W.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...SPECIAL FEATURES...
AT 21/21O0 UTC...TROPICAL DEPRESSION EIGHT-E IS CENTERED NEAR 
20.7N111.9W MOVING W-NW OR 290 DEGREES AT 6 KT. ESTIMATED 
MINIMUM CENTRAL PRESSURE IS 1005 MB. MAXIMUM SUSTAINED WINDS ARE 
25 KT WITH GUSTS TO 35 KT. SEE LATEST NHC FORECAST/ADVISORY 
UNDER AWIPS/WMO HEADERS MIATCMEP3/WTPZ23 KNHC FOR MORE DETAILS. 
SCATTERED MODERATE CONVECTION IS WITHIN 180 NM OF THE SW 
QUADRANT.

AT 21/2100...RECENTLY UPGRADED TROPICAL DEPRESSION NINE-E IS 
CENTERED NEAR 13.9N93.2W MOVING W OR 270 DEGREES AT 2 KT. 
ESTIMATED MINIMUM CENTRAL PRESSURE IS 1007 MB. MAXIMUM SUSTAINED 
WINDS ARE 25 KT WITH GUSTS TO 25 KT. SEE LATEST NHC 
FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP4/WTPZ24 KNHC 
FOR MORE DETAILS. THERE IS NUMEROUS TO SCATTERED MODERATE TO 
STRONG CONVECTION WITHIN 210 NM SW SEMICIRCLE.   

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE AXIS IS ALONG 10N110W TO 
10N117W TO 12N128W THEN 11N131W TO 10N135W TO 12N140W. NO 
SIGNIFICANT CONVECTION. 

...DISCUSSION...

ALOFT...AN UPPER LEVEL ANTICYCLONE IS CENTERED NEAR 32N109W WITH 
RIDGE EXTENDING SW ACROSS THE BAJA PENINSULA TO 20N140W 
DOMINATING THE FORECAST WATERS N OF 20N. MODERATE TO STRONG 
SUBSIDENCE AND DRY AIR ALOFT ARE INDICATED BY WATER VAPOR 
IMAGERY MAINLY N OF 15N W OF 125W. AN INVERTED TROUGH WITH AXIS 
FROM 11N120W ACROSS THE BAJA PENINSULA TO 26N108W. IN THE DEEP 
TROPICS...AN UPPER LEVEL RIDGE RUNS ALONG 05N W OF 130W. 
OTHERWISE...NE TO E FLOW PREVAILS OVER THE DEEP TROPICS WITH 
SIGNIFICANT MID/UPPER LEVEL MOISTURE E OF 125W.  

ALSO AT THE SURFACE...A SURFACE RIDGE COVERS THE AREA N OF 20N W 
OF 130W. A FILLING 1012 MB LOW PRES IS EMBEDDED WITHIN THE ITCZ 
NEAR 11N130W. SCATTERED MODERATE CONVECTION IS WITHIN 90 NM W OF 
THE CENTER OF THIS LOW. 

CROSS EQUATORIAL S SWELL CONTINUES TO AFFECT THE WATERS OVER S 
CENTRAL WATERS AND SE WATERS TO THE COAST OF MEXICO AND W 
PANAMA. 

$$
AL