000
AXPZ20 KNHC 040352
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT MAR 04 2006

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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0315 UTC.

...ITCZ...
ITCZ AXIS ALONG 5N77W 5N90W 1N107W 3N122W 3N140W. NO SIGNIFICANT 
CONVECTION OBSERVED.

...DISCUSSION...
A LONG WAVE TROUGH DOMINATES THE E PACIFIC. A SHORT WAVE TROUGH 
IS ROTATING THROUGH THE LARGE PATTERN WITH ITS MEAN AXIS ALONG 
32N123W 12N120W AT THE MOMENT. A SHORT WAVE RIDGE IS NOTED JUST W
OF THE DISCUSSION AREA ALONG 155W. DEBRIS MOISTURE IS SPILLING 
OVER THE RIDGE INTO THE DISCUSSION AREA N OF 26N W OF 123W. DRY 
UPPER AIR IS OBSERVED ALONG THE TROUGH AXIS ROUGHLY WITHIN 120 
NM EITHER SIDE OF LINE 32N113W 16N127W. 

DOWNSTREAM ANOTHER SHORTWAVE RIDGE EXTENDS NW INTO THE AREA 
ALONG 5N85W 25N104W TO BEYOND 35N103W. A SMALL UPPER CYCLONE IS 
OBSERVED NEAR 22N83W AND IS MOVING E WHILE FILLING RAPIDLY. AN
UPPER MOISTURE PLUME IS NOTED ALONG THE RIDGE WITHIN 180 NM 
EITHER SIDE OF LINE 35N97W 22N112W. OTHERWISE DRY UPPER AIR IS 
INDICATED OVER THE REMAINDER OF THE DISCUSSION AREA. 

AT THE SURFACE A WEAKENING COLD FRONT EXTENDS ALONG 32N117W 
24N131W ACCOMPANIED BY LARGE NW SWELLS WHICH WILL MOVE E TO THE 
BAJA PENINSULA SAT AS THE FRONT WEAKENS E OF THE SEA OF CORTEZ.

GAP WINDS...HIGH PRES BUILDING OVER THE GULF OF MEXICO IN WAKE 
OF COLD FRONT WILL SURGE THROUGH THE GULF OF TEHUANTEPEC 
INCREASING WINDS TO 20 TO 25 KT AROUND SUNRISE SAT AND IN THE 
GULF OF PAPAGAYO AS WELL. N WINDS WILL INCREASE TO 20 KT OVER 
THE GULF OF PANAMA BY 24 HOURS.

$$
NELSON