© NASA JPL, Ed OlsenAIRS infrared image from Aug. 31 a 4:59 p.m. EDT shows the icy clouds of powerful Hurricane Jimena about to impact Baja California (bottom right), a fading Tropical Depression Kevin (left at sea), and a trail of pyrocumulus clouds stretching from Los Angeles to New Mexico from the California fires.
It's unusual to see towering clouds that are created from smoke and fires, but that's what showed up in the latest satellite imagery from NASA, when also capturing powerful Hurricane Jimena and Tropical Depression Kevin in the Eastern Pacific Ocean. Jimena's outer rainbands were already spreading over southern Baja California at 11 a.m. EDT.
"I have never before seen the signature of a pyrocumulus cloud in the infrared channel which I use for hurricane imagery," said Ed Olsen of the Atmospheric Infrared Sounder (AIRS) Team at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The pyrocumulus clouds are towering cumulus clouds that were created by the smoke and heat from the California wildfires that are currently burning around Los Angeles. In the AIRS infrared image, they stretch from Los Angeles, Calif. and sweep into Nevada, Arizona and New Mexico between latitude 32 and 36.
The AIRS instrument flies onboard NASA's Aqua satellite and provides valuable infrared data on cloud top temperatures. They're important because they tell forecasters how high thunderstorms are in a tropical cyclone. The higher the thunderstorm, the more powerful.
At the same time, an extremely dangerous Hurricane Jimena is approaching Baja California. This is a powerful storm with sustained winds that are a Category Four on the Saffir-Simpson Scale. AIRS revealed very high, cold, powerful thunderstorms in Jimena's center of circulation, so high that they're colder than minus 63 degrees Fahrenheit (F).
NASA's CloudSat also flew above Jimena and captured a side view of the storm earlier today. The CloudSat data indicated Jimena's highest clouds as high as 15 kilometers (9.3 miles), verifying the AIRS data and indicating strong convection and a powerful hurricane.