NASA sees Tropical Cyclone Victor weakening under wind shear

January 22, 2016

After days at hurricane-force, NASA-NOAA's Suomi NPP satellite showed that Tropical Cyclone Victor in the South Pacific Ocean was falling apart as a result of wind shear. Victor has weakened to a tropical storm.

On Jan. 22 at 0137 UTC (Jan. 21 at 8:47 p.m. EST) when NASA-NOAA's Suomi NPP satellite passed over Victor, the VIIRS instrument captured an infrared image of the storm that showed the strongest thunderstorms were being sheared or pushed to the east of the center from strong westerly vertical wind shear. There were still bands of thunderstorms wrapping into the low-level center.

At 0900 UTC (4 a.m. EST), Victor's sustained winds dropped to 40 knots (46 mph/74 kph), making it a tropical storm. It was centered near 22.3 degrees south latitude and 174.6 degrees west longitude, about 473 nautical miles east-southeast of Suva, Fiji. Victor was moving to the west at 9 knots (10.3 mph/16.6 kph). Victor is moving around the northwestern edge of a subtropical ridge (elongated area of high pressure) and is expected to curve south (around the western edge of the center).

Several warnings in Tonga remain in effect while others have been dropped as Victor weakened. The tropical cyclone warning previously in force for Tongatapu and 'Eua is now cancelled. The gale warning previously inforce for Tongatapu and 'Eua is now cancelled. A strong wind warning remains inforce for Vavau and Ha'apai and is now inforce for Tongatapu and 'Eua. A heavy damaging swells remain in force for all Tonga waters. For updates from the Tonga Meteorological and Coast Radio Services, visit:

Because Victor has moved into an area with increased vertical wind shear and cooler sea surface temperatures, the Joint Typhoon Warning Center expects Victor to weaken over the next two days and dissipate.

NASA/Goddard Space Flight Center

Related Tropical Storm Articles from Brightsurf:

NASA finds powerful storm's around Tropical Storm Cristina's center
A low-pressure area strengthened quickly and became Tropical Storm Cristina in the Eastern Pacific Ocean and infrared imagery from NASA revealed the powerful thunderstorms fueling that intensification.

NASA satellite gives a hello to tropical storm Dolly
During the morning of June 23, the fourth system in the Northern Atlantic Ocean was a subtropical depression.

NASA follows Tropical Storm Nuri's path
An animation of four days of imagery from NASA's Terra satellite showed the progression and landfall of Tropical Storm Nuri.

NASA finds an elongated Phanfone now a tropical storm
NASA-NOAA's Suomi NPP satellite provided a visible image of Phanfone as it continues moving through the South China Sea.

Tropical Storm Krosa gets a comma shape
Tropical Storm Krosa continued on its journey northward in the Northwestern Pacific Ocean when NOAA's NOAA-20 polar orbiting satellite passed overhead and captured a visible image of the strengthening storm in a classic tropical cyclone shape.

Satellite shows Tropical Storm Flossie holding up
Satellite imagery showed that Tropical Storm Flossie's structure didn't change much overnight from July 31 to August 1.

NASA tropical storm Erick strengthening
Infrared imagery from NASA's Aqua satellite revealed a stronger Tropical Storm Erick in the Eastern Pacific Ocean.

GPM satellite provides a 3D look at Tropical Storm Barry
The Global Precipitation Measurement mission or GPM core satellite provided a couple of views of Tropical Storm Barry that showed its cloud heights and rainfall rates.

NASA looks at Tropical Storm Funani's rainfall
Tropical Storm Funani (formerly classified as 12S) continued to affect Rodrigues Island in the South Pacific Ocean when the GPM satellite passed overhead and analyzed its rainfall.

NASA sees Tropical Storm Man-yi approaching typhoon strength Tropical Storm Man-Yi con
Tropical Storm Man-Yi continued to strengthen in the Northwestern Pacific Ocean as NASA-NOAA's Suomi NPP satellite provided a visible image of the storm.

Read More: Tropical Storm News and Tropical Storm Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to