* Flash Flood Watch in effect through midnight *
4:00 p.m. – A break in the rain
Radar shows the wave of rain has exited the region, except right around the Bay. Enjoy this dry window while it last. Radar does not show imminent rainfall although a pop-shower cannot be ruled out in the next few hours.
Stay tuned for our PM forecast update which will be posted in the next hour for the detailed outlook through Monday, to be posted by early this evening at: Capital Weather Gang front page
2:40 p.m. – Flood warnings issued for parts of region, but rain to quickly progress north
Given the heavy rain passing over soils saturated from Saturday’s rain, flooding warnings have been issued for parts of the region, including northwest D.C., Montgomery County, Fairfax County and portions of Anne Arundel, Prince George’s and Calvert County.
Fortunately, the heavy rain passing through the region is moving very quickly and should exit the Beltway by 3 to 3:15 p.m. and our northern suburbs between 3:30 and 4 p.m. However, it’s raining hard enough that localized flooding is possible in these downpours.
Reagan National Airport has picked up at least another 0.84 inches of rain since 2 p.m.
It’s best to avoid traveling near creeks and streams, some of which are still rising from Saturday’s rain and will rise faster with any additional rainfall.
2 p.m. – Severe thunderstorm warning for southern Prince George’s County
A swath of rain and storms in streaking into the immediate metro region from the south. Severe thunderstorm warnings have been issued for northern Charles and southern Prince George’s counties, as well as northern Calvert and southern Anne Arundel counties through 2:15 p.m. to 2:45 p.m.
Very heavy rain that could produce localized flooding, lightning, and gusty winds are possible with these storms. They are moving quickly (at 35 mph) and should exit the region to the north between 3 and 4 p.m.
From 5 a.m….
TODAY’S DAILY DIGIT
A somewhat subjective rating of the day’s weather, on a scale of 0 to 10.
3/10: After an early lull, the threat of moderate-to-heavy showers returns by afternoon, probably disrupting some of our Sunday outdoor plans.
Today: Increasing chance of showers, some could be heavy. Highs: 78 to 82.
Tonight: Overcast and muggy, heavy evening showers possible. Lows: 69 to 73.
Tomorrow: Occasional showers and storms. Highs: 81 to 85.
View the current weather at The Washington Post.
FORECAST IN DETAIL
We probably won’t see a repeat of yesterday’s epic rainfall. But we’re still in for a wet ride, as moisture-laden air off the ocean combines with a stalled front to deliver waves of showers and embedded thunder today through midweek. With the exact location and timing of the heaviest rain difficult to predict, all of us should be on guard over the next several days for the continued risk of flooding.
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Today (Sunday): It’s a bit foggy to start, with maybe an isolated shower through midmorning. Shower chances increase late morning with showers likely during the afternoon, as winds from the southeast pull in increasingly moist and unstable air off the Atlantic. We shouldn’t see the solid shield of rain we saw yesterday, but rather a few separate waves of showers, each with the potential to deliver pockets of heavy rain and more flooding. A few rumbles of thunder are possible as well. Highs top out near 80 under mostly cloudy skies, with increasing humidity as dew points rise into the low 70s. Confidence: Medium-High
Tonight: Scattered heavy showers and a bit of thunder remain possible through the evening, perhaps becoming lighter and more isolated overnight. The air grows even more uncomfortably humid as dew points approach the mid-70s. Thick cloud cover prevents temperatures from falling much, with most of us leveling off in the low 70s. Winds continue from the southeast around 10 mph. Confidence: Medium-High
Tomorrow (Monday): The same general pattern is expected, with mostly cloudy skies and scattered showers possible throughout the day. The afternoon brings the best chance of heavier showers and storms, as slightly stronger winds from the southeast (about 10 to 15 mph) continue to pump in the moist and unstable air off the Atlantic. Flash flooding remains a concern wherever any heavier bands of rain happen to set up. Temperatures trend a touch warmer, as highs hit the low to mid-80s with very high humidity. Confidence: Medium
Tomorrow night: Occasional showers continue likely during the evening and possibly overnight, with the potential for a few briefly intense downpours. Cloud cover keeps temperatures up once again, with lows only dropping to the low to mid-70s. Winds stubbornly remain from the southeast around 10 mph. Confidence: Medium
A LOOK AHEAD
A front anchored across the lower Mid-Atlantic means more of the same Tuesday through Wednesday, with occasional showers and storms likely. Odds are we’ll see the diurnal trend continue, with lighter showers during the morning and heavier rain during the afternoon into evening, but it’s hard to pinpoint exactly how things will play out. Highs remain in the low to mid-80s, with unrelenting humidity. Confidence: Low-Medium