000
AXPZ20 KNHC 272155
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI APR 27 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2145 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 9N81W 7N87W 9N100W 5N120W 5N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION IS NOTED WITHIN 
120 NM EITHER SIDE OF LINE 8N84W 5N95W AND WITHIN 30 NM EITHER 
SIDE OF LINE 12N102W 10N108W AND WITHIN 30 NM 9N122W AND 8N139W.

...DISCUSSION...


AN UPPER RIDGE LIES OVER THE W PORTION CRESTING ALONG 27N140W 
29N133W 26N126W WITH UPPER MOISTURE NOTED UNDER THE RIDGE. AN 
UPPER CYCLONE IS OVER THE BAJA PENINSULA NEAR 28N113W AND IS 
SHIFTING ESE WITH TIME. DRY UPPER AIR IS INDICATED OVER THE 
DISCUSSION AREA N OF 20N BETWEEN 130W AND 109W. AN UPPER 
ANTICYCLONE IS OVER THE BAY OF CAMPECHE NEAR 18N93W WITH AN 
ASSOCIATED RIDGE EXTENDING NW TO A CREST OVER THE S CENTRAL 
CONUS ALONG 32N104W 33N97W 33N87W. UPPER MOISTURE IS ADVECTED NE 
UNDER THIS RIDGE OVER THE NW GULF OF MEXICO. 

AN UPPER ANTICYCLONE IS NOTED OVER THE DEEP TROPICS NEAR 9N103W 
WITH A RIDGE EXTENDING W OVER THE ITCZ TO NEAR 9N123W WITH 
SLIGHT ENHANCEMENT OF CONVECTION. SOME OF THE DEBRIS MOISTURE 
SPREADS NE ACROSS THE COAST OF MEXICO NEAR 103W. 

AN UPPER RIDGE EXTENDS W OFF THE COAST OF S AMERICA TO A CREST 
NEAR 7N91W. UPPER DIFFLUENCE IS ENHANCING ITCZ CONVECTION E OF 
92W WITH THE DEBRIS MOISTURE SPREADING NE ACROSS CENTRAL 
AMERICA.

GAP WINDS...BRISK ELY TRADES OVER THE W CARIBBEAN WILL SURGE 
INTO THE GULF OF PAPAGAYO FOR AT LEAST A COUPLE MORE DAYS.

$$
NELSON