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Eastern North Pacific Tropical Weather Discussion (Text)



000
AXPZ20 KNHC 061536
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                        
1605 UTC SAT FEB 6 2015

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1500 UTC.               

...SPECIAL FEATURES...                                      
GULF OF TEHUANTEPEC STORM WARNING... TIGHT PRESSURE GRADIENT
PERSISTS ACROSS SOUTHERN MEXICO. STRONG 40-45 KT NORTHERLY WINDS
CONTINUE ACROSS THE GULF...AND ARE FORECAST TO REACH 50-55 LATE
SAT NIGHT INTO SUN MORNING DUE TO STRENGTHENING HIGH PRESSURE IN
THE W GULF OF MEXICO. CONDITIONS ARE EXPECTED TO DIMINISH BELOW
STORM FORCE SUN NIGHT...THEN REMAIN 30-40 KT SEVERAL MORE DAYS
INTO MID-WEEK AS HIGH PRESSURE REMAINS IN PLACE OVER E MEXICO
AND THE WESTERN GULF. GLOBAL MODELS SUGGEST STORM CONDITIONS MAY
REDEVELOP MON NIGHT. THIS ONGOING GALE EVENT WILL CONTINUE TO
GENERATE LARGE 8-15 FT NE SWELL EXTENDING FAR BEYOND ITS SOURCE
REGION AND MERGING WITH SWELL GENERATED FROM THE PAPAGAYO EVENT.

GULF OF PAPAGAYO GALE WARNING... STRONG NE WINDS CONTINUE ACROSS
CENTRAL AMERICA SPILLING THROUGH GAPS AND BAYS NEAR THE COAST. A
LARGE PLUME OF 20-30 KT NE WINDS EXTEND ACROSS GULF OF PAPAGAYO
AND ADJACENT COASTAL AREAS TO NEAR 06N95W WITH SEAS TO 8-10 FT.
A TIGHTER PRES GRADIENT WILL DEVELOP TONIGHT AND SUN ACROSS
CENTRAL AMERICA AND PUSH GAP WINDS NEAR PAPAGAYO IN EXCESS OF 35
KT IN ABOUT 21-24 HOURS. THIS PROLONGED WIND EVENT IS IMPACTING
THE ENTIRE REGION FROM PANAMA TO SOUTHERN MEXICO...WITH DOWNWIND
OF PAPAGAYO EXPECTED TO MERGE WITH DOWNWINDS FROM TEHUANTEPEC. A
VERY LARGE AREA OF SIGNIFICANT SEAS WILL DEVELOP THIS WEEKEND TO
ENCOMPASS MOST OF THE AREA S OF 15N BETWEEN 90W-110W.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...         

ITCZ EXTENDS FROM 04N89W TO 03N101W TO 05N112W TO 02N121W TO
05N129W TO 03N140W. SCATTERED MODERATE ISOLATED STRONG
CONVECTION WITHIN 75 NM OF THE AXIS BETWEEN 104W-113W...AND
WITHIN 60 NM OF AXIS W OF 128W.

...DISCUSSION...                                               

A SURFACE RIDGE EXTENDS N OF 18N W OF 110W. THE PRES GRADIENT
BETWEEN HIGH PRESSURE OVER THE GREAT BASIN AND LOWER PRESSURE
NEAR BAJA CALIFORNIA IS SUPPORTING 20-30 KT WINDS IN THE GULF OF
CALIFORNIA. SCATTEROMETER DATA SHOWS FRESH TO STRONG TRADE WINDS
N OF THE ITCZ W OF 117W...WITH HIGHEST WINDS CENTERED NEAR 08N
130W. THE ENHANCED TRADES ARE SUPPORTING 9-13 FT SEAS IN THE
AREA FROM 06N-14N W OF 120W. TRADES ARE EXPECTED TO GRADUALLY
DIMINISH THE NEXT COUPLE OF DAYS WITH SEAS SUBSIDING TO 8-10 FT
FROM 08N-14N W OF 120W. A COLD FRONT WILL APPROACH 140W EARLY
MON WITH NW SWELL ASSOCIATED WITH THE FRONT REACHING THE NW PART
OF THE AREA SUN. FRESH TO STRONG SOUTHERLY WINDS ARE LIKELY N OF
25N AHEAD OF THE FRONT. EXPECT SEAS TO BUILD TO 12-15 FT AS THE
FRONT SWEEPS INTO FAR NW PORTION MON.

FRESH TO STRONG NORTHERLY WINDS WILL PREVAIL S FROM THE GULF OF
PANAMA TO NEAR 02N-04N THROUGH MID-WEEK WITH SEAS BUILDING TO
ABOUT 10 FT NEAR 06N81W.

$$
MUNDELL

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Page last modified: Saturday, 06-Feb-2016 15:37:06 UTC