000
AXPZ20 KNHC 052145
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC TUE MAR 5 2013

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 
2100 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH EXTENDS FROM 09N84W TO 05N89W TO 04N95W THEN ITCZ 
TO 04N110W TO 07N122W TO 03N140W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION WITHIN 90 NM N OF AXIS BETWEEN 96W AND 109W.

...DISCUSSION...
THE SUBTROPICAL RIDGE EXTENDS FROM 31N118W TO 1021 MB HIGH PRES 
CENTERED NEAR 28N126W TO 27N143W TO 1027 MB HIGH PRES CENTERED 
NEAR 32N153W. SOUTHERN PORTION OF A COLD FRONT REACHING THE COAST
OF NORTHERN CALIFORNIA AND SOUTHERN OREGON EXTENDS FROM 36N127W 
TO 28N136W TO 26N145W...CLIPPING THE NW PART OF THE DISCUSSION 
AREA FROM 32N131W TO 27N140W. ASCAT SCATTEROMETER PASS AT 1900 
UTC AND WINDSAT PASS AT 1635 UTC BOTH SHOWED GENTLE TO MODERATE 
WINDS S OF 30N ASSOCIATED WITH THE FRONTAL BOUNDARY. EARLIER 
ASCAT PASS AT 1540 UTC SHOWED WEAK NE GAP WIND FLOW PERSISTING 
NEAR THE GULF OF PAPAGAYO.

EXPECT HIGH PRES ASSOCIATED WITH SUBTROPICAL RIDGE TO BECOME 
FIRMLY ENTRENCHED NEAR 35N140W WED THEN GRADUALLY SHIFT E TO NEAR
35N132W THROUGH SAT...ACTING TO STEER STORM SYSTEMS INTO BRITISH 
COLUMBIA AND AWAY FROM THE DEEP TROPICS.

STORM FORCE WINDS A FEW DAYS AGO IN GULF OF TEHUANTEPEC HAVE 
PRODUCED A LARGE AREA OF NE SWELL SPREADING DOWNWIND FROM ITS 
SOURCE REGION...NOW EXTENDING S OF 15N BETWEEN 95W AND 120W. 
EXPECT A SHORT-LIVED GALE WIND EVENT TO COMMENCE IN THE GULF OF 
TEHUANTEPEC AROUND 12Z WED...AND CONTINUE THROUGH 12Z-15Z THU. 
THIS WILL GENERATE A NEW SET OF WIND WAVES THAT WILL SPREAD SW 
AS NE SWELL THROUGH FRI MORNING. EXPECT NE WINDS IN GULF OF 
PAPAGAYO TO CONTINUE TO PULSE AT 15-25 KT THROUGH THU...WITH 
SEAS 7 TO 9 FT FROM 08N TO 11N W OF 91W. NW SWELL ASSOCIATED 
WITH FRONT BRUSHING PAST NW PORTION OF AREA WILL SPREAD SE OVER 
NW HALF OF FORECAST AREA BY WED AFTERNOON...THEN DIMINISH THU.

$$
MUNDELL