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Even as Carlos continues to inundate Darwin, a new tropical cyclone, dubbed Dianne, has taken shape off northwestern Australia, from whence it will eventually threaten the nation's west with damaging winds and flooding rain.
Wednesday morning, EST, the center of T.C. Dianne lay about 300 miles northwest of Learmonth, near Cape North West, Western Australia. Highest sustained winds were at least 40 mph. The storm was nearly stationary.
Satellite image shows T.C. Dianne off NW Australia, Feb. 16, 2011 (Australia Bureau of Meteorology).
The atmospheric setting will favor intensification, even rapidly so, during the next two days, so Dianne could become the equivalent of a strong hurricane.
Storm movement will become southward, maybe on a path intersecting the west coast of Australia near the end of the week.
Direct high wind impact will be confined to open seas for at least the next two days. However, moisture linked to Dianne will trigger local flooding downpours over far-western Australia, most of which is sparsely settled desert.
Depending on track, Dianne could eventually spark an outbreak of widespread flooding rain and even damaging winds.
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Roads turned into raging rivers in Ellicott City, Maryland, on Sunday afternoon when thunderstorms unloaded more than two month’s worth of rain in less than two hours.
Record heat will continue to bake the central United States and fuel severe thunderstorms through Monday.
While there can be a passing shower or thunderstorm, the steadiest rain targeting Charlotte, North Carolina, is expected to hold off until after Sunday night's Coca-Cola 600.
After Alberto makes landfall later this holiday weekend, the danger for flooding will continue to expand across the southeastern United States in the following days.
Governors of Florida, Mississippi and Alabama have declared states of emergencies ahead of Subtropical Storm Alberto.
Following mainly dry weather early this week, damp conditions will make a comeback in the Ohio Valley, Great Lakes and Northeast as June begins.
While Alberto is expected to target the upper Gulf Coast this holiday weekend, the risk for major flooding in the southeastern United States may extend beyond Memorial Day.
Cyclone Mekunu made landfall on the Arabian Peninsula on Friday night, leaving six people dead in Oman and 30 others missing, according to local officials.