Tropical Cyclone Hellen (21S) remains a strong cyclone near the northwest coast of Madagascar on Monday. Hellen will briefly move over northwest Madagascar before turning to the west and striking Mozambique as a much weaker tropical system later this week.
The combination of very warm waters and low wind shear allowed Hellen to rapidly intensify as it moved over the open waters of Mozambique Channel last week.
Hellen had winds of over 150 mph (130 knots), which is the equivalent of a very strong Category 4 hurricane in the Atlantic Ocean over the weekend before weakening as it came onshore just west of Mahajanga on Monday.
Image of Tropical Cyclone Hellen as it moves over Madagascar Monday morning, EDT.
Through Monday morning, local time, Mahajanga had received more than 125 mm (5 inches) of rain along with winds of 65-80 kph (40-50 mph).
A ridge of high pressure will force Hellen towards mainland Africa before it makes a second landfall. The current interaction with land and the drier air associated with the ridge of high pressure should act to further weaken the system before it reaches the coast of Mozambique.
Even though Hellen will be dramatically weaker when it approaches Mozambique, locally heavy rainfall will still result in the threat for some flooding near the central coast.
Meteorologist Eric Leister contributed to this story.
The threat for severe thunderstorms will shift eastward on Tuesday, pushing into the western Great Lakes by Tuesday night.
Indonesia's Meteorology, Climatology and Geophysics agency listed the earthquake as a magnitude-7.2.
Drenching downpours, locally gusty thunderstorms and squalls at sea will continue in and around Florida through much of the week.
A heat wave will grip the Northeastern United States during the last week of July with temperatures climbing well into the 90s each afternoon.
Several days of excessive heat and humidity will put many at risk across a large portion of the United States this week.
There is a distinct difference between a watch and a warning, and knowing the difference can save your life.
Western Pacific (1990)
Typhoon Steve east of Iwo Jimo. Peak winds of 125 mph sustained gusts to 155 mph.
5-12" of rain north of Denver led to serious flash flooding (28th-29th). 108 mobile homes were destroyed and 481 others were damaged in Ft. Collins. 5 people were killed and 40 others injured.
Sharon, PA (1999)
70 mph wind gus in a thunderstorm.