Imani on the weakening on weekend

March 26, 2010

This isn't a good weekend for keeping tropical cyclones alive, as Tropical Storm Omais is becoming extra-tropical in the northwestern Pacific Ocean and Tropical Storm Imani appears doomed over the weekend in the Southern Indian Ocean.

Imani was still hanging onto tropical storm status on March 26 at 0900 UTC (5 a.m. EDT) with maximum sustained winds near 52 mph (45 knots), but the storm is running into vertical wind shear - basically a tropical cyclone killer. Imani was located about 810 nautical miles southwest of the Cocos Islands, near 21.3 South and 86.4 East. It was slugging southward at 3 mph (2 knots).

On March 26, NASA's Aqua satellite passed over Imani at 0836 UTC and the Moderate Resolution Imaging Spectroradiometer instrument onboard captured a visible image of the storm. It showed that the northern half of the tropical cyclone contained very scattered thunderstorms which is conducive to strong wind shear in that quadrant of the storm.

Satellite imagery revealed that its low-level circulation center is now "fully exposed" on the north side of the storm, and that there is weak and sheared-off convection (winds coming in block thunderstorms from forming by pushing rising air away). That wind shear is forecast to increase, so Imani's chances of weakening are also increased. Imani is expected to become a depression over the weekend.
-end-


NASA/Goddard Space Flight Center

Related Wind Shear Articles from Brightsurf:

NASA imagery reveals Tropical Storm Gamma battered by wind shear
NASA's Terra satellite obtained visible imagery of Tropical Storm Gamma being battered by outside winds in the south central Gulf of Mexico.

NASA finds wind shear displacing Lowell's strongest storms
NASA's Aqua satellite provided an infrared view of Tropical Storm Lowell that revealed the effects of outside winds battering the storm.

NASA finds Dolphin swimming against wind shear
NASA's Terra satellite provided a visible image of a slightly elongated Tropical Storm Dolphin as it battled wind shear upon its approach to east central Japan.

NASA finds wind shear not letting up on Tropical Storm Vicky
NASA's Terra satellite obtained visible imagery of Tropical Storm Vicky as it continued moving through the eastern North Atlantic Ocean fighting strong wind shear.

NASA finds Tropical Storm Rene less affected by wind shear
NASA's Terra satellite obtained visible imagery of Tropical Storm Rene is it continued moving north though the central North Atlantic Ocean.

NASA's Aqua Satellite finds wind shear not letting up on Omar  
Tropical Depression Omar is one stubborn storm. Since it developed early in the week, it was being affected by wind shear.

NASA's Terra Satellite provides clear picture of wind shear battering Omar
NASA's Terra satellite provided a visible image that showed Tropical Storm Omar had weakened to a depression as it continued to be battered by strong upper level winds.

NASA sees wind shear still battering tropical storm Iselle
NASA infrared imagery shows wind shear continued to batter Tropical Storm Iselle in the Eastern Pacific Ocean for the second day.

NASA finds new Tropical Storm Iselle already battling wind shear
NASA infrared imagery shows that newly formed Tropical Storm Iselle is already battling for its life under wind shear.

NASA finds wind shear affecting Tropical Storm Josephine
NASA-NOAA's Suomi NPP satellite provided forecasters with a visible image of Tropical Storm Josephine east of the Lesser Antilles island chain.

Read More: Wind Shear News and Wind Shear Current Events
Brightsurf.com 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 Amazon.com.