Brian's exclusive forecast for Washington DC:
*A Flash Flood Watch is in effect from Tuesday night through late Wednesday night*
*A Coastal Flood Watch is in effect from Tuesday night through Wednesday morning*
Today: Sunshine early, then increasing clouds with a high around 60.
Tonight: Cloudy with rain developing. Cooler with a low in the upper 40s.
Tuesday: Occasional showers in the morning, then steadier rain in the afternoon. Cool with a high in the mid 50s.
Tuesday Night: Rain showers and possible thunderstorms. The low will be in the lower 50s.
Wednesday: Breezy with showers and thundershowers. The high will be in the mid to upper 60s.
The extended forecast calls for a mostly cloudy sky on Thursday with a few rain showers. The low will be in the lower 60s and the high will be in the mid 70s. Clouds and sun on Friday with a low in the lower 50s and a high in the mid to upper 60s. Clouds and sun on Saturday with a low in the upper 40s and a high in the mid to upper 60s. Sunny on Sunday with a low in the upper 40s and a high in the upper 60s.
After a sunny morning, clouds continue to increase around the area as we transition from a dry weather pattern to a wet period. Showers are expected to overspread the area overnight and into Tuesday morning. Temperatures will be quite cool on Tuesday with highs only in the 50s. Meanwhile, an area of low pressure will move into the Great Lakes region and its associated warm front will move northward across the Middle Atlantic states. The result will be widespread steady rainfall and occasional thundershowers on Tuesday afternoon through Wednesday as the warm air overrides cooler air the surface. Some of the rain showers may produce heavy rain, hence the need to post flood watches in some areas. Most thundershowers and thunderstorms will be garden variety, but a few may become severe with strong winds and possible tornadic activity. A cold front will push from west to east toward Chesapeake Bay by Wednesday night. This will produce additional showers and thundershowers. Rainfall amounts from Monday night through Wednesday night may exceed 1 to 2 inches with locally higher amounts. The warmest day of the week will be on Thursday as warm air surges north in advance of the cold front. Once the front clears the area, a sunny Friday and Saturday can be expected with lows in the upper 40s to lower 50s and highs in the mid to upper 60s.
Regional Weather Information
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