Frigid cloud top temperatures show Hurricane Dora's power

Jul 20, 2011
NASA's Aqua satellite passed over Tropical Storm Dora on July 19 at 20:11 UTC (4:11 p.m. EDT). NASA's AIRS infrared imagery showed strong thunderstorms all around the center of circulation (purple) where heavy rain was falling. Credit: NASA/JPL, Ed Olsen

Extremely cold cloud top temperatures in thunderstorms are an indication of the strength they possess, and infrared satellite data from NASA revealed a large area of very cold and powerful thunderstorms around the center of Hurricane Dora.

The Atmospheric Infrared Sounder (AIRS) instrument aboard NASA's Aqua satellite captured an (false-colored) that revealed strong convection (rapidly rising air that forms thunderstorms) and the strong thunderstorms (purple) around the center of Hurricane Dora. Those areas had cloud-top temperatures as cold as -63F/-52C. Cloud-top temperatures are important because they tell how high thunderstorms are, and the higher the thunderstorm, the colder the and the more powerful the thunderstorms. NASA's Aqua satellite passed over Tropical Storm Dora on July 19 at 20:11 UTC (4:11 p.m. EDT).

At 8 a.m. EDT (5 a.m. PDT) Hurricane Dora was near 14.4 North and 102.3 West. That's about 235 miles (380 km) southwest of Acapulco, Mexico and 250 miles (400 Km) south of Lazaro Cardenas, Mexico. have increased to near 90 mph (140 kmh) with higher gusts. Additional strengthening is forecast during the next 48 hours.

Dora is moving toward the west-northwest near 18 mph (30 kmh) and is expected to gradually turn to the northwest and slow down in the next two days. The National Hurricane Center noted that Dora is expected to move nearly parallel to the coast of southwestern Mexico over the next couple of days.

Dora is expected to brush the southern tip of Baja California on Friday, July 21, so a tropical storm watch is in effect from Lazaro Cardenas to Cabo Corrientes, Mexico. Winds are expected to increase in the watch area tonight, and large ocean swells will affect the coast over the next couple of days.

Explore further: Is iron rain the reason why Earth and the moon are so different?

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Is iron rain the reason why Earth and the moon are so different?

24 minutes ago

New experiments show that the asteroids that slammed into Earth and the moon more than 4 billion years ago were vaporised into a mist of iron. The findings, published in Nature Geoscience, suggest that the iron mist thrown up from the high ve ...

What's beneath Hawaii's most active volcano?

2 hours ago

Step away from the villages and idyllic beaches of Hawaii, and you may think you've been transported to the moon. Walking along the lava flows of the Kilauea volcano, the landscape changes from a lush tropical ...

Arson to blame for Argentine forest fires

16 hours ago

Fires that have ravaged some 20,000 hectares of forest in Argentina's remote Patagonia region were deliberately set, according to Argentine officials on Monday.

Water in smog may reveal pollution sources

17 hours ago

The chemical signature of water vapor emitted by combustion sources such as vehicles and furnaces has been found in the smoggy winter inversions that often choke Salt Lake City. The discovery may give researchers ...

User comments : 0

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.