Tropical Depression Joyce continues to lose its organization due to drier air moving into the depression. The National Hurricane Center forecasts it to weaken over the next 48 hours before potentially becoming a remnant low tonight or Tuesday.
Florence brought massive rainfall to the Carolinas, exceeding 30 inches in some areas, causing record or major flooding along many rivers. The storm's heavy rainfall caused widespread damage and at least 20 fatalities.
TESS has shared its first science image, revealing a wealth of stars and other objects in the southern sky. The image captures systems previously known to have exoplanets, highlighting the mission's potential to discover new worlds.
Tropical Storm Helene is battling wind shear, causing a Tropical Storm Warning for the Azores Islands. Wind shear is weakening the storm's rotation and pushing strongest storms northeast of the center.
NASA's Suomi NPP satellite captures a visible image of Mangkhut, showing a symmetrical storm with a clear eye surrounded by powerful thunderstorms. The Joint Typhoon Warning Center reports maximum sustained winds near 167 mph, forecast to pass over Luzon as a category 5 equivalent typhoon.
Hurricane Florence made landfall near Wrightsville Beach, North Carolina, bringing estimated maximum winds of 90 mph and a minimum central pressure estimate of 958 millibars. The storm's infrared imagery showed the power and extent of its massive storm system.
ELFIN aims to measure magnetic waves and 'lost' electrons, verifying the causal mechanism behind energetic electrons escaping the Van Allen Belts. The mission uses two CubeSats to observe electron precipitation across space and time.
NASA-NOAA's Suomi NPP satellite detected tropical depression Olivia being affected by westerly wind shear, which was preventing thunderstorm development and causing weakening. The post-tropical cyclone is expected to dissipate over the weekend of Sept. 15 with maximum sustained winds near 35 mph.
Wind shear is tearing Tropical Storm Joyce apart, with coldest cloud top temperatures reaching minus 50 degrees Fahrenheit. The storm's rotation is being skewed by winds at different levels of the atmosphere, pushing against its cylindrical circulation center.
Tropical Depression Isaac has weakened significantly due to strong northwesterly wind shear, which has skewed its rotation and reduced maximum sustained winds to near 35 mph. The system is forecast to gradually weaken over the next few days, potentially degenerating into a tropical wave.
The NASA-NOAA satellite detected Tropical Cyclone Barijat crossing the Gulf of Tonkin, weakening significantly due to wind shear. The storm's rotation was skewed by winds at different altitudes, causing it to dissipate quickly after landfall in Vietnam.
Hurricane Helene is decoupling from wind shear due to southwesterly vertical wind shear, pushing the bulk of the storm away from its rotating center. The NHC expects wind shear to increase on Sept 13, potentially weakening the storm further.
Subtropical Storm Joyce is disorganized and wandering in the north central Atlantic Ocean, according to NASA satellite imagery. The system's patchy development of thunderstorms indicates a lack of organization, which may lead to heavy rain generation.
Hurricane Florence's powerful winds and storm surge are being closely monitored by NASA. The satellite images reveal a weakened eye due to southern shear, with cloud tops as cold as -80F (Celsius). This suggests potential for heavy rainfall.
NASA's Aqua satellite revealed a large eye surrounded by powerful storms in Typhoon Mangkhut, which could generate heavy rainfall due to cloud top temperatures as cold as minus 80F. The storm made landfall along the northeast coast of Luzon, Philippines on Sept. 14, with warnings already in effect.
Tropical Depression Olivia's cloud top temperatures reached -70F (-56.6C), capable of generating heavy rainfall and life-threatening flash flooding. The depression is expected to weaken further by Friday, becoming a post-tropical remnant low.
Wind shear is affecting Tropical Storm Isaac, causing its circulation center to be displaced and potentially weakening the storm. The satellite data reveal a small area of coldest cloud top temperatures off-center, which can generate heavy rainfall.
Tropical Storm Barijat is being affected by northerly vertical wind shear, which can weaken the storm. The Hong Kong Observatory has issued a Strong Wind Signal, No. 3 warning, indicating winds with speeds of 25-38 mph.
The Suomi NPP satellite observed Mangkhut's clear eye, enabling scientists to track the storm's movement. The typhoon is expected to make landfall in the northern Philippines and potentially affect Hong Kong, China.
Tropical Storm Olivia is causing heavy rainfall in Hawaii, with the National Weather Service predicting total accumulations of 5-10 inches in some areas. The storm's cloud tops reached temperatures as low as -63 degrees Fahrenheit, indicating strong winds and potential for life-threatening flash flooding.
Hurricane Florence is approximately 400 miles in diameter, with cloud top temperatures of -80F indicating heavy rainfall capability. The storm has the potential to produce extremely dangerous conditions, including life-threatening storm surges and rainfall exceeding 20 inches in coastal North Carolina.
Scientists monitored hurricane water vapor to gauge potential for intense rainfall; analysis shows coldest cloud top temperatures reaching -70 degrees Fahrenheit. Forecasts predict storm weakening and shifting trajectory over the next few days.
Former Tropical Storm Paul has weakened to a remnant low-pressure area about 1,115 miles west of Mexico's Baja California, as observed by NASA's Aqua satellite. The system is expected to gradually weaken over the next several days.
The GPM satellite analyzed heavy rainfall in Tropical Storm Isaac, revealing intense convective storms with rain rates over 140 mm per hour. The storm's structure was also observed in a 3D view from NASA's Goddard Space Flight Center.
Tropical Depression Paul is moving westward, with maximum sustained winds near 35 mph. The depression is expected to weaken into a remnant low on Wednesday due to stable air and cooler sea surface temperatures.
The Suomi NPP satellite provided a visible image of Hurricane Helene's eye on September 10, measuring approximately 20 nautical miles in width. The storm showed signs of strengthening with strong thunderstorms and cold cloud tops before expected weakening on September 12.
Super Typhoon Mangkhut strengthened into a Category 4 storm with sustained winds of 155mph. The National Weather Service predicts further intensification to Category 5 by Wednesday and Thursday.
NASA-NOAA's Suomi NPP satellite captures Tropical Storm Barijat as a small and disorganized system with developing thunderstorms. The storm is forecast to steadily weaken after moving over southern China's Leizhou Peninsula.
Hurricane Olivia is expected to bring heavy rainfall and strong winds to the Hawaiian Islands as it moves towards the state. The storm's cloud tops have temperatures near minus 70 degrees Fahrenheit, capable of generating heavy rainfall.
Tropical Storm Isaac's circulation center has shifted away from the bulk of clouds and precipitation, indicating wind shear is at play. NASA satellite data reveals a vertically stacked system of rotating winds, with wind shear pushing against the storm, weakening its rotation and balance.
NASA's Aqua satellite observed Hurricane Florence undergoing an eyewall replacement cycle, which may lead to increased rainfall and storm intensity. The storm is expected to make landfall in North Carolina or South Carolina on Thursday, September 13, with severe weather warnings already in effect.
Hurricane Helene has strengthened and become highly organized, with maximum sustained winds reaching 105 mph. It is forecast to become a major hurricane by tonight and then undergo steady weakening by late Tuesday.
Hurricane Olivia is expected to affect Hawaii with strong winds and heavy rainfall, according to NASA. The Central Pacific Hurricane Center has issued Tropical Storm Warnings for Maui County and a Tropical Storm Watch for Oahu.
Hurricane Florence's maximum sustained winds have increased to near 115 mph, making it a category 3 hurricane. Satellite data reveal powerful thunderstorms with cloud tops as cold as minus 63 degrees Fahrenheit, capable of generating heavy rainfall.
Two lunar transits were observed by NASA's Solar Dynamics Observatory in September 2018, with the first lasting one hour and obscuring 92% of the Sun. The second transit was shorter, lasting 49 minutes and showing a distinct view of the Moon's surface due to the lack of atmospheric distortion.
Tropical Storm 27W is forecast to intensify over the next three days before making landfall on Sept. 13 over China's Luichow Peninsula. The storm will then emerge into the Gulf of Tonkin, making a final landfall north of Hanoi, Vietnam.
NASA's Aqua satellite detected a thick ring of powerful storms around Hurricane Isaac's central dense overcast, with coldest cloud tops reaching minus 70 degrees Fahrenheit. The storm is expected to strengthen over the next day or two before weakening by the middle of the week.
Tropical Storm Paul is experiencing wind shear, displacing its strongest storms from the center. This displacement has led to a lack of well-organized convection and minimal banding features, according to the National Hurricane Center. As a result, weakening is forecast, and Paul is expected to become a remnant low in a few days.
Typhoon Mangkhut brought damaging winds to Guam and the Northern Marianas Islands, with sustained winds reaching up to 115mph. The storm is expected to intensify through Wednesday, September 12, before moving away from the region.
Tropical Storm Florence is experiencing temporary wind shear, causing cloud top temperatures to warm, but forecasters predict it will restrengthen into a hurricane over the weekend. Large swells are expected to affect the US East Coast and Bermuda, resulting in life-threatening surf and rip currents.
Hurricane Olivia's eye is clearly visible in infrared imagery from NASA's Aqua satellite, surrounded by extremely cold cloud top temperatures of minus 63 degrees Fahrenheit. The storm is moving west-northwest at 15 mph with maximum sustained winds near 125 mph and is expected to weaken slowly through the weekend.
Hurricane Norman is being battered by strong wind shear, causing it to weaken and move northwest of the Hawaiian Islands. The storm's maximum sustained winds are near 85 mph, with higher gusts and a large swell affecting east-facing shores.
NASA's Aqua satellite detected Tropical Depression Gordon's center over Arkansas on September 7, with maximum sustained winds near 10 mph. The depression is expected to produce total rain accumulations of 3-6 inches, causing local flooding and flash flooding in Missouri and the Midwest.
The Global Precipitation Measurement mission found heaviest rainfall rates at 1.5 inches per hour around the storm's compact eye. Hurricane-force winds extend up to 25 miles from the center, while tropical-storm-force winds reach 115 miles out.
Tropical Depression Gordon is expected to produce significant rainfall accumulations of 3-7 inches in northwest Mississippi and Arkansas, potentially causing local flooding. The depression is moving west-northwest at 8 mph, with little change in strength forecast over the next 48 hours.
Hurricane Norman's stronger storms have expanded beyond its center, with cloud top temperatures reaching minus 70 degrees Fahrenheit, capable of generating heavy rainfall. The storm is forecast to pass 200-300 miles northeast of the main Hawaiian Islands, bringing large and potentially dangerous surf.
The GPM core satellite revealed heavy rainfall rates of 50 mm/h near the eye of Hurricane Florence, with storms producing rain at a rate of 2 inches per hour. The satellite also provided estimates of storm heights using data from geostationary satellites and radar.
Typhoon Jebi's rainfall affected Shikoku and most of Honshu's south central coastal regions, with estimated amounts over a one-week period ranging from 100 mm (~4 inches) or more. The storm caused significant flooding, including at Kansai International Airport near Osaka, resulting in fatalities and injuries.
Hurricane Norman rapidly intensified from 85 to 115 mph with Norman now a category 3 hurricane on the Saffir-Simpson scale. The center of the storm is located near latitude 19.5 degrees north and longitude 147.7 degrees west, moving towards the west-northwest.
Hurricane Florence strengthened into a major hurricane, with maximum sustained winds estimated at 120 mph (195 kph), according to NASA-NOAA's Suomi NPP satellite observations. The storm is expected to gradually weaken and then re-strengthen through the weekend.