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Tropics Watch: A 40% Chance of Development This Week

Published Nov 4, 2026, 6:11 AM AST787daily · Original analysis

At a glance

  • No active Atlantic systems
  • 7-day outlook: 1 area of interest, highest chance 40%
  • Season peak is September 10; official guidance comes from the National Hurricane Center (NHC) and the San Juan office of the National Weather Service (NWS)

Why this matters: Whether anything in the Atlantic could reach Puerto Rico in the coming week, and how much of the season is left.

Our coverage

Hurricane hub: every active system's distance from San Juan

As of November 4, the National Hurricane Center lists no active systems in the Atlantic basin.

The Atlantic is quiet right now. The National Hurricane Center (NHC) lists no active systems, so nothing is tracking toward or near Puerto Rico. The one thing on the outlook map is a single area of interest over the Western and Central Atlantic, with a 20% chance of development in 48 hours and 40% over seven days. That area sits outside Puerto Rico’s corridor, and a 40% chance means development is possible but less likely than not.

For the island, this reads as a calm week. The climatological peak of the season, September 10, has passed, and its most active weeks, mid-August to late October, are behind us. Late-season systems can still form, so it is worth glancing at the outlook now and then, but nothing here calls for changes to plans. Official guidance comes from the NHC and the San Juan office of the National Weather Service (NWS).

most active weeks peak, Sep 10 this week Jun Jul Aug Sep Oct Nov Nov 30
The Atlantic season, June 1 to November 30. The shaded weeks are the statistical peak, mid-August to late October, as on the hurricane hub; the dashed line is the climatological peak of September 10. 26 days of the season remain. A calendar, not a forecast: no system on this week's list is placed on it.

The 7-day outlook

Source: National Hurricane Center 7-day Tropical Weather Outlook, November 4.
Outlook area48-hour chance (NHC chance of a tropical cyclone forming within 48 hours)7-day chance (NHC chance of formation within seven days)Corridor (Whether the area sits on a path that could reach Puerto Rico)
Western and Central Atlantic20%40%no concern for Puerto Rico

Live tracks, cones and the Puerto Rico prep checklist are on the hurricane hub; the weather page carries the daily tropics line. Official watches and warnings: the National Hurricane Center and NWS San Juan.

This is the 9th Tropics Watch of the season (last week’s is here). Source: the National Hurricane Center’s advisories and its Tropical Weather Outlook of Nov 4 at 1:10 AM.

About this analysis
Cite this

Source: 787daily, “Tropics Watch: A 40% Chance of Development This Week”, Nov 4, 2026, https://787daily.com/news/2026-11-04-tropics-watch-a-40-chance-of-development-this-week/

Numbers from
NHC active systems and the Tropical Weather Outlook

Every Tropics Watch

Our coverage

Hurricane hub: every active system's distance from San Juan