NASA sees Tropical Depression Polo winding down

September 22, 2014 by Rob Gutro, NASA's Goddard Space Flight Center
NASA's Aqua satellite gathered infrared data on Polo on Sept. 22 at 5:11 a.m. EDT, reading cloud top temperatures. There was a small area of high clouds (blue), indicating that most thunderstorms had weakened or already dissipated except for that area. Credit: NASA JPL, Ed Olsen

Infrared satellite imagery from NASA's Aqua satellite showed only a swirl of low-level clouds some deep clouds around Polo's weakening center on Sept. 22 as the storm weakened to a depression.

The Atmospheric Infrared Sounder or AIRS instrument aboard Aqua gathered infrared data on Polo on Sept. 22 at 5:11 a.m. EDT, reading cloud top temperatures. There was a small area of , indicating that most thunderstorms in the depression had weakened or already dissipated except for that area.

At 5 a.m. EDT on Monday, Sept. 22, Tropical Depression Polo's maximum sustained winds have decreased to near 35 mph (55 kph) and additional weakening is forecast during two days. In fact, the National Hurricane Center expects Polo to become a remnant later in the day.

Polo was centered near latitude 22.5 north and longitude 113.8 west, about 250 miles (40 km) west of the southern tip of Baja California. It was moving toward the west near 8 mph (13 kph) and is expected to turn to the southwest by Sept. 23. Swells generated by polo affecting the southern Baja California peninsula are expected to subside late on Sept. 22.

The National Hurricane Center discussion noted during the morning of Sept. 22 at 5 a.m. EDT that Polo had been devoid of significant deep convection for 10 hours and that the satellite imagery showed the cyclone consisted of "a tight swirl of low-level with a few deeper clouds located over 100 nautical miles west of the center near the mid-level remnants."

Polo will likely be declared a remnant low late on Sept. 22 and dissipate by Sept. 26.

Explore further: NASA sees Tropical Storm playing polo with western Mexico

Related Stories

NASA sees Tropical Storm Polo intensifying

September 17, 2014

Tropical storm warnings now issued for a portion of the Southwestern coast of Mexico as Polo continues to strengthen. Infrared imagery from NASA's Aqua satellite showed powerful thunderstorms around the center of the storm.

NASA marks Polo for a hurricane

September 18, 2014

Hurricane Polo still appears rounded in imagery from NOAA's GOES-West satellite, but forecasters at the National Hurricane Center expect that to change.

Recommended for you

Ocean acidification may reduce sea scallop fisheries

September 21, 2018

Each year, fishermen harvest more than $500 million worth of Atlantic sea scallops from the waters off the east coast of the United States. A new model created by scientists at the Woods Hole Oceanographic Institution (WHOI), ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.