Updated forecast: After up to 4 inches of rain and flooding, more possible into this evening

* Flood watch through 2 p.m. today *

8:20 a.m. — Flood warning in many areas through late morning after 2 to 4 inches of rain; more rain possible through this evening

Many parts of the immediate D.C. area were drenched by 2 to 4 inches of rain overnight, causing areas of flooding. Rain has thinned out for the time being but areas of light to moderate may redevelop this morning and there may be another period of steady rain and even some embedded thunderstorms this afternoon into the evening. The rain now looks to last longer than it had in earlier forecasts.

“Streams continue to rise due to excess runoff from earlier rainfall,” the National Weather Service writes. The possibility of another half-inch to inch of rain through this evening could exacerbate the situation.

The rainfall map below shows that a widespread zone along and just west of Interstate 95 in Northern Virginia saw 2 to 4 inches of rain overnight. Reagan National Airport, which received about 4 inches, was near the jackpot. Dulles Airport received 2.32 inches while BWI Marshall Airport recorded comparably less, just 0.93 inches.

The Weather Service received about a dozen reports of flooding in the area overnight. Numerous streams overflowed, including parts of Rock Creek, flooding adjacent roads. Low-lying, poor drainage areas also experienced flooding, including parts of Interstate 295 running the District and Interstate 395 running through Arlington and the District.

Original article from 5 a.m.

A somewhat subjective rating of the day’s weather, on a scale of 0 to 10.

4/10: I could go for a pool day instead of puddle day.

  • Today: Rain, ending with time. Highs: Low to mid-70s.
  • Tonight: Clearing. Lows: Mid- to upper 60s.
  • Tomorrow: Partly to mostly sunny. Highs: Low 80s.

We’re dodging raindrops this morning and hopefully missing out on significant flooding as much as possible. Rain odds dwindle with time today, leaving us dry by evening if not prior. The rest of the forecast is considerably better. At least, until we get to the heat on Tuesday. In the meantime, if you’re out and about today, be aware of the potential to come across high water. Turn around, don’t drown.

Today (Saturday): Pockets of heavy rain are ongoing early morning. Although it could be hit-or-miss, some areas could pick up too much in a short period, leading to flooding. Showers may continue off and on into the afternoon, but the heaviest probably comes early. Widespread rainfall totals of one to three inches seem a decent bet, with some spots ending up with more. It’s on the cool side despite remaining rather muggy. Temperatures may only reach the low and mid-70s in the afternoon as winds turn to come out of the northeast. Gusts around 25 mph are possible. Confidence: Medium

Tonight: A stray shower may linger. Otherwise, clearing. We should trend toward mostly clear by morning. Winds are light out of the north and northeast. Temperatures dip to the mid- and upper 60s for lows. Confidence: Medium-High

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Tomorrow (Sunday): Humidity is down, and sunshine is the rule. We’ll see some clouds in the peak heating of the day, but it should stay dry. Highs are mainly in the low 80s. Confidence: Medium-High

Tomorrow night: Skies are clear. The relatively low humidity allows temperatures to fall to a range of near 60 to mid-60s for lows. Confidence: Medium-High

Skies remain rather sunny on Monday. With a wind switching to come from the south, humidity begins to rise, but it’s still on the low-moderate side. Afternoon readings make the mid-80s or so. Confidence: Medium

Temperatures are poised to jump back toward summerlike levels on Tuesday. Sunshine is dominant as temperatures rise to a range of low to mid-90s for highs. Fortunately, it may just be a one-day pulse of higher heat, for now. Confidence: Medium

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