Wintry weather took the stage for most of this week, as snow fell over the East, allowing Boston to set a new daily accumulation record and New York City to receive its fourth measurable snowfall of the season.
Around the middle of the week, warmth surged through parts of the country, creating foggy conditions for many.
Meanwhile, in California, warm air and insufficient precipitation have left the state ripe for fire danger. On Dec. 16, a blaze ignited in Big Sur, consuming more than a dozen houses.
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A monsoon low that brought deadly flooding to northeast India, Bangladesh and Nepal over the past week will shift westward into Tuesday and bring flooding to new areas.
The government of Portugal has issued a state of public calamity as wildfires continue to burn across the country ahead of a weekend heat wave.
A tropical disturbance will sweep across Florida and the Bahamas with enhanced downpours and rough surf into the middle of the week.
On Monday, Aug. 21, the event that millions have anticipated will unfold when the moon passes directly in front of the sun.
Harvey showed signs of regeneration on Sunday and may become a tropical depression or storm at any time into Tuesday morning.
Heat and humidity surging from the Great Lakes and Ohio Valley into the Northeast will be the key ingredients for severe weather to develop Tuesday and Tuesday night.
A bout of locally heavy rain will impact northern and western areas of the United Kingdom Sunday night into Tuesday as moisture from Gert crosses the British Isles.
In addition to Harvey, two additional tropical features are being monitored in the Atlantic basin but rapid development is unlikely at this time.