Tag: Uesi 2020

Feb. 14, 2020 – NASA Finds Ex-Tropical Cyclone Uesi’s Rains Affecting New Zealand

Although it is now an “ex-tropical cyclone,” Uesi continues to generate some moderate rainfall, especially in its southern quadrant as it moves toward New Zealand.

The Global Precipitation Measurement mission or GPM satellite provided a look at the rainfall rates on Feb. 14 at 2:11 a.m. EST (0716 UTC). GPM found heaviest rainfall south of center and in bands far south of the center falling at rates of 1 inch (25 mm) per hour. Light rain appears around the entire system, falling at less than 0.2 inches (less than 5 millimeters) per hour.

On Feb. 13 at 2218 UTC (5:18 p.m. EST), the New Zealand Met Service (NZMS) reported “Ex-Tropical Cyclone Uesi was located near Lord Howe Island this morning, and is moving southwest. The system is expected to gradually recurve towards the southeast and move close to the lower South Island during Sunday [Feb.16].”

On Feb. 14, NZMS noted a Heavy Rain Warning is currently in effect for Westland south of Otira. A Heavy Rain Watch is in effect for the remainder of the South Island West Coast and Stewart Island.

NZMS said “A heavy rain warning is in effect for the South Island West Coast and Stewart Island on Sunday [Feb.16] and early Monday [Feb. 17]. Former Tropical Cyclone Uesi is forecast to approach the South Island from the north Tasman Sea overnight Saturday and lie to the west of Fiordland on Sunday. It should then move southwest from late Sunday onwards and weaken. This system is expected to bring periods of heavy rain to the west and south of the South Island during Sunday and early Monday. Strong to gale north to northwest winds are also expected in parts of the South Island and the lower North Island during this time.”

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.

GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA.

By Rob Gutro
NASA’s Goddard Space Flight Center

Feb. 13, 2020 – NASA Finds Wind Shear Affecting Tropical Cyclone Uesi

NASA satellite imagery revealed that vertical wind shear appears to be affecting Tropical Cyclone Uesi in the Southern Pacific Ocean.

On Feb. 13 at 0315 UTC (Feb. 12 at 10:15 p.m. EST), the Moderate Resolution Imaging Spectroradiometer or MODIS instrument that flies aboard NASA’s Aqua satellite provided a visible image of Tropical Cyclone Uesi being adversely affected by vertical wind shear. The image showed that the bulk of clouds were being pushed to the southeast of the center of circulation.

In general, wind shear is a measure of how the speed and direction of winds change with altitude. Tropical cyclones are like rotating cylinders of winds. Each level needs to be stacked on top each other vertically in order for the storm to maintain strength or intensify. Wind shear occurs when winds at different levels of the atmosphere push against the rotating cylinder of winds, weakening the rotation by pushing it apart at different levels. Northwesterly wind shear was affecting Uesi and pushing the bulk of clouds to the southeast of the center.

At 0300 UTC on Feb. 13 (10 p.m. EST on Feb. 12), the Joint Typhoon Warning Center (JTWC) issued the final bulletin on Tropical cyclone Uesi. At that time, Uesi was located near latitude 27.7 degrees south and longitude 161.1 degrees east, about 332 nautical miles southwest of Noumea, New Caledonia. Uesi had maximum sustained winds near 55 knots (63 mph/102 kph). The storm was moving to the south-southwest.

On Feb. 13 at 11:59 pm AEDT (Australia Eastern Time) or 7:59 a.m. EST, the Australian Bureau of Meteorology (ABM) noted “Ex-tropical cyclone Uesi is moving rapidly southwards and will produce destructive wind gusts at Lord Howe Island over the next few hours.”  ABM said that the system is expected to maintain an intensity equivalent to a category 2 tropical cyclone as it passes the island. For updates from ABM, visit: http://www.bom.gov.au/.

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.

By Rob Gutro
NASA’s Goddard Space Flight Center

Feb. 12, 2020 – NASA Finds Heavy Rain Southwest of Tropical Cyclone Uesi’s Center

The Global Precipitation Measurement mission or GPM satellite provided a look at the rainfall occurring within Tropical Cyclone Uesi and found heaviest rainfall in the southern quadrant of the storm.

Uesi is in the South Pacific Ocean and has been affecting New Caledonia. New Caledonia is a collectivity of France, located south of Vanuatu and about 1,210 km (750 miles) east of Australia.

The GPM’s core satellite passed over Uesi on Feb. 12 at 12:11 p.m. EST (1711 UTC). GPM found heaviest rainfall southwest of the center, falling at a rate of 1.6 inches (40 mm) per hour. Directly south of the center were areas where rainfall rates were falling at a rate of 1 inch (25 mm) per hour. Scattered light rain, falling at less than 0.2 inches (less than 5 millimeters) per hour appeared to be occurring in the rest of the storm.

On Feb 12 at 1 a.m. EST (5 p.m. New Caledonia local time), Meteo-France, which forecasts for New Caledonia, noted that Uesi’s maximum sustained winds were near 110 kph (68 mph/59 knots). Uesi was moving to the southwest. It was centered near latitude 23.5 degrees south and longitude 162.8 degrees east, about 450 km (280 miles) west-southwest of Noumea.

Meteo-France noted, “The rains eased in the afternoon, except over the Canala region where the showers are still continuing this evening. In the past 12 hours, we have noted 80 to 130 mm (3.1 to 5.1 inches) in the relief of the South and 80 mm (3.1 inches) in 3 hours in the town of Canala. The wind remains strong with gusts up to 90 kph (60 mph/49 knots) on the chain, on the West Coast and the South. Uesi is moving away from the Caledonian coasts, its influence is still felt throughout the country. Conditions remain disturbed overnight, with a gradual improvement in the north.”

Uesi is expected to turn to the southwest and become subtropical after a day or two, off the coast of eastern Australia.

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.

GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency, JAXA.

For updates from Meteo-France, visit: http://www.meteo.nc/nouvelle-caledonie/cyclone/phenomenes-en-cours

By Rob Gutro
NASA’s Goddard Space Flight Center

Feb. 11, 2020 – NASA Finds a Stronger Tropical Cyclone Uesi Near New Caledonia

NASA’s Terra satellite passed over the South Pacific Ocean and found a stronger Tropical Cyclone Uesi after obtaining infrared imagery of the storm. Uesi continues moving away from Vanuatu and today is affecting New Caledonia.

Infrared data provides temperature information, and identifies the strongest thunderstorms that reach high into the atmosphere and have the coldest cloud top temperatures. On Feb. 11 at 6:15 a.m. EST (1115 UTC), the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA’s Terra satellite gathered that temperature information about Uesi’s cloud tops. MODIS found powerful thunderstorms south and east of the center of circulation where temperatures were as cold as or colder than minus 80 degrees Fahrenheit (minus 62.2 Celsius). Cloud top temperatures that cold indicate strong storms with the potential to generate heavy rainfall.

On Feb. 11, the Vanuatu Meteorology and Geo-Hazards Department (VMGD), in Port Vila issued an update on Uesi.  At 7:48 a.m. EST (11:48 p.m. Vanuatu local time), Tropical Cyclone Uesi was located at latitude 19.6 degrees south and longitude 162.6 east, about 435 miles (700 km) west of Tanna. Winds close to the center of the system have increased from near 55 mph (90 kph/50 knots) to 78 mph (125 kph/67 knots), making it equivalent to a Category 1 hurricane. Uesi was moving in a south-southeasterly direction. VMGD said that the potential for the system to recurve and move towards Vanuatu is low.

VMGD’s final advisory on Uesi said, “Isolated heavy rainfalls may still be expected about [the] Vanuatu group today and tonight. Seas will remain very rough with heavy to phenomenal swells over coastal and open waters to the west of the Vanuatu group. Severe weather warning for heavy rainfalls for northern, central and southern provinces, while Marine strong wind warning for all coastal waters are current.”

Meteo France, the forecast entity that provides forecasts for New Caledonia, which is located to the south-southwest of Vanuatu, is now feeling more of the effects from Uesi. On Feb. 11, Meteo France noted, “Uesi continues to move south passing west of Bélep and Grande-Terre a hundred kilometers (62 miles).” Rainbands continue to affect the whole territory and generate large accumulations of rain. As Uesi continues moving toward the south on Feb. 12, it is pulling away from New Caledonia. However, forecasters note that bands of thunderstorms can still bring heavy rainfall and gusty winds on Feb. 11. Highest rainfall is likely especially on the eastern side of the island.

For updates from VMGD’s website: wwww.vmgd.gov.vu and VMGD’s Facebook page: www.facebook.com/vmgd.gov.vu.

For updates on New Caledonia’s forecast, visit Meteo France:  http://www.meteo.nc/

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.

By Rob Gutro
NASA’s Goddard Space Flight Center

Feb. 10, 2020 – NASA Examines Tropical Storm Uesi’s Heavy Rainfall

NASA analyzed Tropical Storm Uesi’s rainfall and found moderate to heavy rainfall around the storm’s center and in a large band of thunderstorms south of the center. That heavy rainfall has triggered warnings for Vanuatu in the Southern Pacific Ocean.

NASA has the unique capability of peering under the clouds in storms and measuring the rate in which rain is falling. The Global Precipitation Measurement mission or GPM core passed over Uesi from its orbit in space and measured rainfall rates throughout the storm on Feb. 10 at 2:31 a.m. EST (0731 UTC).

The heaviest rainfall around the center was falling at a rate of 1.2 inches (30 mm) per hour. In a large band of thunderstorms south of the center, rainfall occurring at a rate of 1 inch (25 mm) per hour. Light rain was occurring throughout the rest of the storm.

On Feb. 10, the Vanuatu Meteorology and Geo-Hazards Department (VMGD), in Port Vila issued an update on Uesi.  At 7 a.m. EST (11 p.m. Vanuatu local time), Tropical Cyclone Uesi was located at latitude 17.6 degrees south and longitude 162.4 east, about 348 miles (560 km) west southwest of Malekula. Winds close to the center of the system were estimated near 55 mph (90 kph/50 knots) and Uesi was moving in a southwest direction.

VMGD’s latest update said, “Rainfalls will be heavy with flash flood over low lying areas and areas close to river banks, including coastal flooding expected about the islands of the northern and parts of the central provinces. The marine strong wind warning is in effect for all Vanuatu coastal waters, while High seas warning is current for the central waters. Very rough to phenomenal seas and heavy to phenomenal swells expected to continue to affect the western parts of the northern and central waters tonight and tomorrow and extending to southern waters thereafter. People, including sea going vessels are strongly advised not to go out to sea until the system has moved out of the area.”

The National Disaster Management Office (NDMO) posted a Blue Alert for the SHEFA and TAFEA provinces.

For updates from VMGD’s website: www.vmgd.gov.vu and VMGD’s Facebook page: www.facebook.com/vmgd.gov.vu.

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.

Both the Japan Aerospace Exploration Agency, JAXA and NASA manage GPM.

By Rob Gutro
NASA’s Goddard Space Flight Center