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On October 3 at 5:45 am EDT (9:45 UTC), NASA's Terra satellite detected the coldest temperatures of the most violent thunderstorms (yellow) in Hurricane Walaka to be as cold or colder that minus 80 degrees Fahrenheit (minus 62.2 Celsius) big clear eye. Credit: NRL / NASA
NASA 's Terra satellite has detected a circle of violent storms around the broad eye of Hurricane Walaka in the center of the Pacific Ocean. Walaka remains a Category 4 hazardous hurricane on the Saffir-Simpson wind scale.
On October 3, NOAA's Central Pacific Hurricane Center (NOAA) warned that "the dangerous Hurricane Walaka would intensify as it was moving rapidly towards the Papahanaumokuakea National Marine Monument and Johnston Stoll remained in the southern quadrant of Walaka. "
A hurricane warning is in effect for Johnston Atoll, the Papahanaumokuakea National Marine Monument, which connects the French frigate and the shoals to Maro's reef. A tropical storm warning is in effect for the Papahanaumokuakea Marine National Monument, which connects Nihoa to French shoals and frigates.
On October 3 at 5:45 am EDT (09:45 UTC), a mid-resolution imaging spectroradiometer or a MODIS instrument aboard NASA's Terra satellite analyzed the temperature at the top of the clouds in infrared light. MODIS discovered that the temperature at the top of the clouds, caused by the most violent storms, surrounded the broad eye. These temperatures were as cold or cold as minus 80 degrees Fahrenheit (minus 62.2 degrees Celsius). They were embedded in a large area around the eye where cloud-top temperatures were as cold or cold as minus 70 degrees Fahrenheit (minus 56.6 degrees Celsius). Cloud top temperatures that indicate severe storms can create heavy rainfall.
The CPHC noted at 2:00 am (8:00 am EDT / 12:00 pm UTC) that the center of hurricane Walaka was located near latitude 18.9 degrees north and longitude 169.8 degrees west. It is about 240 km north of Johnston Island.
Walaka is heading north near 14 mph (23 km / h) and is expected to turn north-northwest with a faster pace today and tonight. Maximum sustained winds are now near 140 mph (225 km / h) with higher gusts. A gradual weakening is possible from today or tonight to Thursday, but Walaka is expected to remain a powerful hurricane when it passes the Papahanaumokuakea Marine National Monument tonight.
According to the CPHC, "Walaka is expected to turn north with a slower speed starting on Thursday, and on this forecasting runway the center of Walaka will probably reach the Papahanaumokuakea Marine National Monument tonight."
For updated forecasts visit: http://www.prh.noaa.gov/cphc
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