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Threat for heavy rain and a cooler pattern this weekend into next week for DC

Heavy Rain Friday

After four days in a row at 80 degrees or higher, today has been closer to average with highs in the mid 70s. Gusty winds have filtered in a drier airmass along with dewpoints in the 40s instead of 60s. So what’s to come looking ahead?

Cooler stretch on the way

Temperatures will be around 10 degrees cooler over the next couple days with one brief warm-up (Friday) before a longer cool period. This is all in response to the upper-level pattern which will favor cooler than average temperatures along with rain chances this weekend into parts of next week.

Heavy Rain Threat

The best chance for heavy rainfall will be late this week Thursday night into Friday morning. A strong area of low pressure over the Midwest is expected to help bring in tropical moisture from the Gulf of Mexico and Atlantic.

Rainfall totals are expected to be anywhere from 1 to 2 inches with the heaviest rain falling late Thursday night through mid-day Friday. The Friday morning commute appears like it will be a rough one around the Metro area. Rain should exit by Friday afternoon so it at least appears dry for Friday afternoon and evening if you have plans for Cinco de Mayo.

Weekend Washout?

The same low that will bring the heavy rainfall to the East Coast Friday is expected to get cut-off from the main flow aloft. This will allow it to sit and spin over much of the Northeast and Mid Atlantic this weekend and potentially into next week.

Temperatures are expected to be cooler than average in the low 60s this weekend. As of now, the best chance for additional rainfall will be on Saturday, but that is subject to change as these systems are notoriously difficult to forecast. Sunday is expected to have more clouds than sun but with lower chances for rain. Cooler than average temperatures are expected to continue into next week with highs in the 60s possibly through next Friday.

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