751
AXPZ20 KNHC 120318
TWDEP
TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON APR 12 2021
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
0220 UTC.
..INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH
A SURFACE TROUGH EXTENDS FROM 10N74W TO 10N80W TO 06N90W TO
07N100W. THE ITCZ CONTINUES FROM 06N101W TO 05N123W TO BEYOND
03.5N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS
NOTED WITHIN 120 NM N OF ITCZ BETWEEN 116W AND 140W.
OFFSHORE WATERS WITHIN 250 NM OF MEXICO...
A RIDGE OF HIGH PRESSURE PREVAILS WEST OF THE BAJA CALIFORNIA,
AND EXTENDS SOUTHEAST TO OFFSHORE OF CABO CORRIENTES ALONG 112W.
THE PRESSURE GRADIENT BETWEEN THE RIDGE AND A TROUGH OVER MEXICO
IS SUPPORTING FRESH NORTHERLY WINDS OFF OF BAJA CALIFORNIA NORTE,
AND MODERATE WINDS OFF BAJA CALIFORNIA SUR. LIGHT TO GENTLE
WESTERLY WINDS PREVAIL ELSEWHERE ACROSS THE OFFSHORE WATERS. SEAS
ARE IN THE 5-10 FT RANGE WEST OF BAJA CALIFORNIA, 3-6 FT OVER
THE REMAINDER OF THE OPEN WATERS OFF MEXICO, AND 1-3 FT OVER THE
GULF OF CALIFORNIA.
MODERATE TO FRESH NW WINDS WILL PREVAIL WEST OF BAJA CALIFORNIA
NORTE INTO MON AS THE RIDGE PERSISTS. INCREASED NW SWELL OFF
BAJA CALIFORNIA NORTE WILL PREVAIL INTO WED, PEAKING AT 8-11 FT
MON MORNING, HIGHEST ACROSS THE OUTER WATERS. GENTLE TO MODERATE
WINDS ARE EXPECTED ELSEWHERE INTO WED. WINDS AND SEAS ARE
EXPECTED TO DIMINISH SLIGHTLY AREAWIDE MON THROUGH WED AS THE
HIGH PRESSURE WEAKENS.
OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND
WITHIN 750 NM OF ECUADOR...
LIGHT TO GENTLE MOSTLY ONSHORE WINDS PREVAIL ACROSS THE FORECAST
AREA, WITH SEAS IN THE 3-5 FT RANGE. LITTLE CHANGE IN WIND AND
WAVE CONDITIONS ARE EXPECTED INTO TUE, BEFORE MODERATE OFFSHORE
GAP WINDS BEGIN ACROSS THE PAPAGAYO REGION. MODERATE SIZED SW
SWELL CROSSING THE EQUATOR TONIGHT WILL MOVE THROUGH THE
OFFSHORE WATERS MON NIGHT THROUGH THU.
REMAINDER OF THE AREA...
A WEAK SURFACE TROUGH ASSOCIATED WITH PERSISTENT DEEP AREA OF
LOW PRESSURE LOCATED W OF THE NW WATERS CONTINUES NEARLY N TO S
ALONG 143W. MODERATE SE WINDS AND SEAS OF 6 TO 8 FT PREVAIL
ACROSS THE FAR NW WATERS E OF THE TROUGH FROM 27N TO 30N.
SCATTERED MODERATE CONVECTION IS SEEN EAST OF THIS TROUGH FROM
28N TO 30N BETWEEN 132W AND 135W. HIGH PRESSURE EXTENDS
SOUTHWARD ACROSS THE NORTHERN WATERS BETWEEN THIS TROUGH AND
110W. THIS IS PRODUCING A MODEST PRESSURE GRADIENT OVER THE
FORECAST WATERS SOUTH OF THE RIDGE. MODERATE WINDS AND SEAS OF
5-8 FT PREVAIL THERE. LITTLE SIGNIFICANT CHANGE IS EXPECTED THE
NEXT COUPLE OF DAYS. HIGH PRESSURE WILL SHIFT INTO THE NORTHERN
WATERS THROUGH TUE, AND SLIGHTLY STRENGTHEN TRADE WINDS NORTH OF
THE ITCZ. NORTHERLY SWELL WILL PROPAGATE SOUTH OF 30N ACROSS THE
WATERS BETWEEN 118W AND 130W THROUGH WED. SEAS OVER THIS AREA
WILL BUILD TO AROUND 9-11 FT TONIGHT THEN GRADUALLY DIMINISH TO
8-9 FT BY TUE.
STRIPLING
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