Tag Archives: 2017 Atlantic Hurricane season

25 July 2017: Six tropical cyclones active in the Pacific

A burst of cyclonic activity at two extremes over the vastness of the Pacific ocean in recent days has generated the six named tropical cyclones we see this Tuesday 25 July 2017!

Infrared GOES satellite image of 25 July 2017 showing Hurricanes HILARY and IRWIN, and Tropical Storm GREG off the Pacific coast of Mexico

Tropical Storm GREG, a strengthening and about to become major Hurricane HILARY, and an also strengthening Hurricane IRWIN are active, and moving away from land, off the Pacific coast of Mexico over the northern East Pacific. This makes it a total of nine named tropical cyclones  in the course of ten weeks in this quite active sub-basin for cyclogenesis.

Infrared satellite image (NOAA) of 25 July 2017 showing Typhoon NORU, Tropical Storm SONCA, Tropical depression KULAP, and a possible tropical cyclone from Tropical Wave 99W moving toward the Philippines

Also on this day, more than 12,000  kilometers to the west, over the northwest Pacific, we see a strengthening Typhoon NORU and a decaying Tropical Depression KULAP to the west of Japan, a strong tropical wave designated as ‘Invest 99W’ by NOAA approaching the Philippines, and some 3.000 kilometers farther to the west Tropical Storm SONCA making landfall in Vietnam.

Quite a spectacle indeed, six named tropical cyclones and a possible seventh, all simultaneously active over the northern Pacific Ocean.

Closer to our neck-of-the-woods here in Florida, and the Gulf and Atlantic coastal regions the tropics are somewhat calm. There have been one off-season named tropical cyclone, ARLENE, in April, and three named storms since the ‘official’ start of the 2017 Atlantic Hurricane Season, including short-lived Tropical Storm DON, which perished over the southeastern Caribbean just last week.

So, busy there, relatively quiet here, however we should keep in mind this is the time of the year when the northern tropics get busy with cyclonic activity. Get ready! Be prepared! MITIGATE!


Visible light satellite image (NOAA) of 9 July showing a strengthening Hurricane EUGENE off the Pacific coast of Mexico

A strengthening Hurricane EUGENE. the fifth-named tropical cyclone of the 2017 eastern north Pacific hurricane season is active off the western coast of Mexico, moving NW parallel to the coastline.

Projected track of Hurricane EUGENE as of 9 July 2017 (Courtesy of the U.S. Navy Research Lab.)

EUGENE is the fifth tropical cyclone to generate in this sub-basin over the last seven weeks. The probability of other tropical cyclones developing soon in this sub-basin appears strong, given the continued presence of a conglomerate of tropical waves and disturbed weather cells in the region extending from the Gulf of Panama to the Pacific waters off the coast of Central America and Southern Mexico, which is in part being fed by tropical waves generated over the eastern Atlantic traveling along ‘Hurricane alley’ and crossing over northern Venezuela and Colombia into the Pacific.

GOES WEST infrared satellite image of 9 July 2017 showing Hurricane EUGENE off the Pacific coast of Mexico. Notice the conglomerate of disturbed weather cells and tropical waves ranging from the Gulf of Panama to waters off the coast of southern Mexico.

The 2017 Atlantic Hurricane season, which is forecast to be busier than average by NOAA, has produced an early ‘off-season’ tropical storm ARLENE in April, and two other named storms, BRET and Cindy, since the official start of the season on 1 June. Tropical Depression #4 generated recently over the western end of ‘Hurricane Alley’, but dissipated over the weekend before amounting to much of anything.  However, the tropical wave ‘assembly line’ over Equatorial Africa and the region over the Eastern Atlantic continue to be populated by stormy weather cells and tropical waves, which provide a continuous source of ‘fuel’ for possible future cyclogenesis over the increasingly warmer surface waters of the Atlantic.

Infrared satellite image (NOAA) of 9 July 2017 showing several tropical waves over the eastern Atlantic waters south of the Cape Verde Islands, and over Equatorial Africa.

While we watch and wait for what may develop, we must remain alert. Be prepared. MITIGATE!