Tag: Damien 2020

Feb. 10, 2020 – NASA Analyzes Ex-Tropical Cyclone Damien’s Rainfall in Western Australia

Tropical Cyclone Damien made landfall on Feb. 9 along the northern Pilbara coast of Western Australia. On Feb. 10, the GPM or Global Precipitation Measurement mission core satellite analyzed the rainfall generated by the remnants that triggered warnings.

As Damien was making landfall around 1:15 a.m. EST (0615 UTC) on Feb. 9, the MODIS instrument aboard NASA’s Aqua satellite captured a visible image of the storm. The MODIS image showed the recently developed eye on the coastline. By 11 a.m. EST, Damien’s center had moved inland into Western Australia. Tropical Cyclone Damien has weakened to a Category 2 system, according to the Australian Bureau of Meteorology (ABM).

On Feb. 10 at 5:41 a.m. EST (1041 UTC), GPM passed over Western Australia and measured the rate of rainfall from Damien’s remnants. GPM showed heaviest rainfall occurring south of the center and falling at a rate of at least 0.2 inches (5 mm) per hour.

The Australian Bureau of Meteorology posted an update at 3 a.m. EST (4 p.m. AWST), Feb. 10, and noted Ex-Tropical Cyclone Damien was located over the northeast Gascoyne, about 62 miles (100 kilometers) north northeast of Meekatharra, moving towards the south.

ABM said, “Ex-Tropical Cyclone Damien is expected to carry with it an area of heavy rainfall as it moves south southeast through the southeastern Gascoyne and the adjacent Goldfields.” That heavy rainfall that may lead to flash flooding.

ABM’s update noted, “Heavy rainfall is forecast over the southeastern Gascoyne and adjacent Goldfields, this area will gradually move south overnight Monday (Feb. 10). Strong and squally winds are also possible. Locations which may be affected include Mount Magnet, Cue, Leinster and Sandstone.”

Since 9 a.m. AWST Monday (8 p.m. EST on Sunday, Feb 9) the following rainfall amounts have been observed: Wiluna Airport 40 mm (1.57 inches) and at Meekatharra 29.8 (1.17 inches).

For updated warnings, visit: http://www.bom.gov.au/wa/warnings/

By Rob Gutro
NASA’s Goddard Space Flight Center

Feb. 07, 2020 -NASA Analyzes Tropical Cyclone Damien’s Water Vapor Concentration

When NASA’s Aqua satellite passed over the Southern Indian Ocean on Feb. 7, it gathered water vapor data that provided information about the intensity of Tropical Cyclone Damien.

On Feb. 7 at 12:25 a.m. EST (1725 UTC), NASA’s Aqua satellite passed over Tropical Cyclone Damien, located in the Southern Indian Ocean and off Australia’s Pilbara coast. Aqua found highest concentrations of water vapor (brown) and coldest cloud top temperatures were around the center. Credits: NASA/NRLThe Australian Bureau of Meteorology (ABM) issued warnings and watches as Tropical Cyclone Damien moves toward the Pilbara Coast of Western Australia.

On Friday, February 7 at 11:46 pm WST (10:46 a.m. EST), the Warning Zone extends from Pardoo to Onslow, including Port Hedland, Karratha, Dampier, Pannawonica and Barrow Island and extending to adjacent inland parts to include Marble Bar, Tom Price and Paraburdoo. The Watch Zone includes inland central Pilbara including Nullagine, Newman and Mt Augustus.

ABM forecasters expect Severe Tropical Cyclone Damien to cause gales on the Pilbara coast from early Saturday morning. Very Destructive winds, very heavy rainfall and a storm surge are expected as Damien crosses the coast during Saturday, Feb. 8.

NASA’s Aqua satellite passed over Tropical Cyclone Damien on Feb. 7 at 12:25 a.m. EST (1725 UTC) and the Moderate Resolution Imaging Spectroradiometer or MODIS instrument gathered water vapor content and temperature information. The MODIS image showed highest concentrations of water vapor and coldest cloud top temperatures were around the center of circulation.

MODIS data also showed coldest cloud top temperatures were as cold as or colder than minus 70 degrees Fahrenheit (minus 56.6 degrees Celsius) in those storms. Storms with cloud top temperatures that cold have the capability to produce heavy rainfall.

Water vapor analysis of tropical cyclones tells forecasters how much potential a storm has to develop. Water vapor releases latent heat as it condenses into liquid. That liquid becomes clouds and thunderstorms that make up a tropical cyclone. Temperature is important when trying to understand how strong storms can be. The higher the cloud tops, the colder and the stronger the storms.

On February 7 at 11:46 pm WST (10:46 a.m. EST), ABM reported that Damien was a Category 3 storm with maximum sustained winds near the center of 140 kilometers (87 miles) per hour with higher wind gusts. Damien was located near latitude 18.9 degrees south and longitude 16.7 degrees east, about 205 kilometers (127 miles) north of Karratha and 255 kilometers (158 miles) northwest of Port Hedland. Damien is moving to the south-southwest.

Forecasters at the ABM reported on Feb. 7, “Severe Tropical Cyclone Damien (Category 3) is expected to intensify as it moves towards the Pilbara coast. Damien is likely to cross the coast between Whim Creek and Mardie during Saturday as a Category 4 system. Later on Saturday or Sunday, Damien will move inland and weaken.”

For the Australian Bureau of Meteorology Weather video update on Feb. 7, visit: https://youtu.be/TgO9v0mYiCM

NASA’s Aqua satellite is one in a fleet of NASA satellites that provide data for hurricane research.

Tropical cyclones/hurricanes are the most powerful weather events on Earth. NASA’s expertise in space and scientific exploration contributes to essential services provided to the American people by other federal agencies, such as hurricane weather forecasting.

For updated forecasts from the ABM, visit: http://www.bom.gov.au/cyclone/index.shtml

By Rob Gutro
NASA’s Goddard Space Flight Center

Feb. 06, 2020 – NASA Sees Tropical Storm Damien Form off Australia’s Pilbara Coast

The low-pressure area that formed off Australia’s Kimberley coast and lingered there for a couple of days has moved west and developed into Tropical Cyclone Damien off the Pilbara coastline. NASA’s Terra satellite passed over the Southern Indian Ocean and provided forecasters with a visible image of the new tropical storm.  The Pilbara Coast is also known as the northwest coast of Western Australia.

On Feb. 6, the Moderate Resolution Imaging Spectroradiometer or MODIS instrument that flies aboard NASA’s Terra satellite provided a visible image of Damien that showed the storm had a more rounded shape than it did the previous day as it continued to consolidate. A more rounded shape of a tropical cyclone indicates it is becoming a more organized storm. Satellite imagery revealed a small central dense overcast with rain bands wrapping in towards the low-level circulation center.

The Australian Bureau of Meteorology (ABM) issued warnings and watches for Damien on Feb. 6. The Warning Zone includes Wallal Downs to Mardie, including Port Hedland, Karratha and Dampier. The Watch Zone extends from Mardie to Onslow, and the inland central Pilbara including Tom Price, Paraburdoo, Marble Bar and Nullagine. A Blue Alert is in effect for residents in or near Wallal Downs to Port Hedland and Mardie to Onslow but not including Onslow, (including the towns of Pannawonica, Tom Price, Paraburdoo, Nullagine and Marble Bar). A Yellow Alert is in effect for residents in or near Port Hedland to Mardie and south to Millstream (including the Town of Port Hedland, Whim Creek, Point Samson, Wickham, Roebourne, Karratha and Dampier).

At 11:00 p.m. AWST (10 a.m. EST) on Feb. 6, the ABM said Tropical Cyclone Damien had maximum sustained winds near 75 kilometers per hour (40 knots/47 mph) with higher gusts. It was located near latitude 17.5 degrees south and longitude 118.1 degrees east, about 315 kilometers (196 miles) north of Port Hedland and 385 kilometers (239 miles) north-northeast of Karratha. Damien is moving to the west-southwest at 20 kilometers (12 miles) per hour.

The tropical cyclone is expected to continue to intensify as it tracks to the west southwest. Damien is expected to turn south towards the Pilbara coast during Friday, Feb 7. ABM cautioned that, “Severe tropical cyclone impact is forecast for the Pilbara coast during Saturday, Feb. 8.”

NASA’s Terra satellite is one in a fleet of NASA satellites that provide data for hurricane research.

Tropical cyclones/hurricanes are the most powerful weather events on Earth. NASA’s expertise in space and scientific exploration contributes to essential services provided to the American people by other federal agencies, such as hurricane weather forecasting.

For updated forecasts from ABM, visit: http://www.bom.gov.au/products/IDW60281.shtml

By Rob Gutro
NASA’s Goddard Space Flight Center