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Out with Ivan, in with fall?

Josh Larson @ 6:00 PM

The remnants of Hurricane Ivan brought very active weather to the DC area Friday into Saturday. Many severe thunderstorms -- some with tornadoes; see Andrew's post below -- pushed through the region, the result of intense atmospheric energy from both the low pressure system that was once Ivan, as well as a cold front.

As expected, rainfall totals varied considerably, but they were generally in line with's expectations. National (DCA) received only about .85", while Dulles (IAD) received closer to 2.4"; Baltimore (BWI) picked up about an inch. The Doppler-estimated storm total precipitation gives a pretty good idea of which areas picked up the most rain:

Note the conspicuous north/south "banding" of heavier precipitation totals - likely the result of the orientation of the squall line which developed Friday afternoon.

Now that Hurricane Ivan is history, we can look forward to a prolonged period of very nice, dry weather, with cooler than average, almost fall-like, temperatures for the next two days; temperatures should rebound to near normal levels by Tuesday.

The average high/low over the next few days is 78/61. But lows Friday night will be in the low to mid 50's, highs Sunday will only be around 70 under abundant sunshine and low humidity, and it will be very cool Sunday night, with lows likely in the mid 40's in the cooler, northwest suburbs, and only in the low 50's downtown. Monday will again feature abundant sunshine, with highs again only near 70. Temperatures should moderate to near 80 by Tuesday. At this time, dry weather is expected through the end of the work week.

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