Flood Warning overnight, rain to gradually relax over weekend after record deluge

* Flood warning thru 7:45 a.m. Saturday for most of metro area *


Radar & lightning: Latest D.C. area radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

10:45 p.m. update: The flood warning has been extended until 7:45 a.m. as an additional 1-2″ of rain is possible overnight – with bands of rain, heavy at times, training across the area from the east. Follow the Twitter feed above for additional updates.

8:05 p.m. update: As a very heavy streamer of rain, with embedded thunder, trains over the metro region, an additional inch of rain is very possible, with isolated higher amounts (3″ being the upper limit).  This is on top of 3-6″ of rain which has already fallen. The heaviest rain looks to fall just south of Rt. 50 in Md. and Va. and the southern half of the District.

A flood warning has been issued through 1:45 a.m. Saturday morning and there have been reports of streams overflowing their banks and covering roads.  Never try to cross a flooded road in your vehicle.  Turn around, don’t drown.

5:10 p.m. update: Reagan National picked up another 0.17″ of rain in the last hour, bringing its daily total to 1.21″, breaking the daily record of 1.10″ from 2002, and bringing its storm total to 3.11″

Link: Regional rainfall totals from the National Weather Service

From 4:27 p.m.: Both Dulles and BWI Airports broke record daily records for rain today, and Reagan National should follow suit before the day closes. It’s safe to say the bulk of the rain from this storm is over, but heavy showers are possible through the PM commute and we remain on the damp side into Saturday. I’m optimistic that we dry out some Sunday, even if it remains cloudy.

Through Tonight: The conveyor belt of moisture off the Atlantic keeps on cycling inland, with occasional showers overnight. A few showers may be heavy, especially this evening. As the night wears on, the shower activity should lessen. Overall, another half inch of rain or so is possible (with locally higher amounts, perhaps exceeding 1″). Lows range from 52-56 (suburbs-city). Winds are from the northeast at around 10 mph.

Tomorrow (Saturday): Scattered showers are possible early in the morning, tapering to patchy drizzle as the morning wears on. The afternoon may well be drizzly, although some areas – especially west of town – may see the precipitation take a break. Highs range from 60-65 with winds from the northeast at 5-10 mph. Saturday’s rainfall totals should be 0.10″ or less.

Saturday night: It remains cloudy, with a 30 percent chance of light rain showers and/or drizzle. Lows range from 54-58 (suburbs-city).

Sunday: No break from the clouds in the morning, with a 20 percent chance of lingering light rain or drizzle. By afternoon, there’s a decent chance we begin to dry out although just a 20-40 percent chance of breaks in the clouds (highest chances west). Highs are in the mid-60s, maybe upper 60s if the sun manages to emerge.

See Camden Walker’s forecast through early next week. And if you haven’t already, join us on Facebook and follow us on Twitter . For related traffic news, check out Dr. Gridlock.

Rainfall totals update: Through 4 p.m., storm totals (since Wednesday) are up to 2.94″ at Reagan National, 4.00″ at Dulles, and 5.49″ at BWI.  Today’s rainfall at Reagan National (so far) is 1.04″, very close to the daily record of 1.10″ from 1905.  Dulles has blown by its previous record of 0.91″ from 2002, with 1.68″ so far and BWI has crushed its 2002 prior record of 1.13″, with its 3.18″ tally so far today.

A rainy Friday morning in Columbia Heights (Dan Lawrence via Flickr)

A rainy Friday morning in Columbia Heights (Dan Lawrence via Flickr)

A poem from reader David Ebenbach:

Still Talking About It

When it comes to the rain we know it’s all been
hashed out, every sentence a dead prayer
you recite by the week. But there are weeks
and there are other weeks. One afternoon the rain
comes in quiet, unexpected. The air susses
with the first sounds, the world overcome with
twilight. Rain patters the windowsill like fingertips.
And just this once, you speak of it, you dare,
you throw all the hand-me-down language
you’ve got. The rain is a very distant applause,
which you’re not the first to notice.

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