Tropical Weather Discussion
Issued by NWS
Issued by NWS
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
379 AXPZ20 KNHC 231943 TWDEP Tropical Weather Discussion NWS National Hurricane Center Miami FL 2205 UTC Sun Nov 23 2025 Tropical Weather Discussion for the eastern Pacific Ocean from 03.4S to 30N, east of 120W including the Gulf of California, and from the Equator to 30N, between 120W and 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 1900 UTC. ...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... The monsoon trough extends from 09.5N84W to 07N86W. The ITCZ extends from 07N86W to 10N121W to beyond 06.5N140W. Scattered moderate and isolated strong convection is from 03N to 09N between 77W and 81.5W, from 07N to 10.5N between 110W and 115W, from 11N to 16N between 114W and 123W, and from 06N to 10N between 123W and 134.5W. ...OFFSHORE WATERS WITHIN 250 NM OF MEXICO... A ridge extends from 1026 mb high pressure NW of the area near 35N133W through 30N125W to offshore SW Mexico. Gentle to moderate winds prevail over the waters W of Baja California N of 20N. Moderate to fresh N-NE winds are from 17N to 20N including near the Revillagigedo Islands and Cabo Corrientes, as well as in the southern Gulf of California due to a locally tight pressure gradient with troughing analyzed over western mainland Mexico. Winds are light to gentle elsewhere in the Gulf of California, and offshore SW and southern Mexico away from the Gulf of Tehuantepec. Fresh to near gale-force winds are over the Gulf of Tehuantepec. Seas are in the 7-10 ft over the waters W of the Baja California peninsula in large NW swell. Seas of 6-9 ft are over the Gulf of Tehuantepec. Elsewhere over the open waters off Mexico, seas are in the 4-7 ft range. Over the Gulf of California, seas of 2-5 ft are noted in the southern portion and 1-3 ft elsewhere. For the forecast, ridging will persists W of Baja California with the moderate to fresh winds from 17N to 20N persisting into the early part of the week, locally strong near Cabo Corrientes. Similar winds will prevail across most of the Gulf of California into mid-week. Large NW swell offshore Baja California will spread southeastward to the Revillagigedo Islands through Mon night before starting to subside. New NW swell may arrive next weekend. Fresh to near gale-force N gap winds can be expected over the Gulf of Tehuantepec through early Mon before diminishing. Gap winds will increase again over the Gulf of Tehuantepec by the middle of the week through the end of the week, possible reaching gale-force Thu and Thu night. Elsewhere, benign marine conditions are expected. ...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND WITHIN 750 NM OF ECUADOR... Fresh to strong NE winds are over the Papagayo region, with moderate to fresh winds extending downstream of the Gulf of Papagayo to near 90W. Gentle to locally moderate winds are elsewhere. Seas are in the 3-5 ft range, except to 6 ft near the Gulf of Papagayo. For the forecast, fresh to strong NE winds will pulse over and downstream of the Papagayo region this week. Moderate or lighter winds are forecast elsewhere through the week and into next weekend. No significant swells are forecast this week. ...REMAINDER OF THE AREA... A ridge extends from 1026 mb high pressure NW of the area near 35N133W through 30N125W to offshore SW Mexico. The pressure gradient between the ridging and lower pressure in the vicinity of the ITCZ is supporting moderate to fresh winds N of the ITCZ to 20N and W of 110W per recent ASCAT scatterometer data. NW swell is propagating across the discussion waters, with rough seas in excess of 8 ft covering the waters W of a line from the southern tip of Baja California to the Revillagigedo Islands to 07N128W. Mainly moderate winds and seas of 4-7 ft prevail over the remainder of the discussion waters. Active convection is near the ITCZ across portions of the central waters per conventional satellite imagery, and as described above leading to locally higher winds and seas. Rough seas of 8 ft or greater in NW swell will propagate across the area, covering much of the discussion waters N of 07N and W of 109W tonight before starting to slowly subside early this week. A new set of NW may arrive by the end of the week and into next weekend. Moderate to fresh trades will continue over the waters N of the ITCZ to near 20N and W of 110W through at least the middle of the week. $$ Lewitsky