Beautiful rainbow over the Washington National Cathedral yesterday evening. (Robert Cole via Twitter)

2:45 p.m. update

A severe thunderstorm warning is up for part of Loudoun, Frederick and Montgomery counties as a line of showers and thunderstorms moves into the area. The main threat in this storm is a damaging wind risk.

This line will continue to progress east, impacting much of the area in the hours ahead. Most of this should be sub severe, but isolated damaging wind is possible pretty much anywhere.

From 5:00 a.m…

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

6/10: Typical summer Sunday with some heat, humidity and the chance of a few late-day storms.

EXPRESS FORECAST

Today: Partly sunny, a few storms possible after noon. Highs: near 90.
Tonight: Early-evening t’storm? Lows: upper 60s to low 70s.
Tomorrow: Mostly sunny, less humid. Highs: mid-80s.

View the current weather at The Washington Post.

FORECAST IN DETAIL

The gloom from yesterday is gone, but we’re not completely out of the woods for a late-day thunderstorm or two as a cold front pushes through. Once the front passes, we’re in for a couple of sunny days with lower humidity. Just a couple, though, as mugginess makes a midweek comeback along with the chance of showers and storms.

Listen to the latest forecast:

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Today (Sunday): More sun today gets the mercury rising, with temperatures on their way toward afternoon highs near 90, and the humidity remaining rather high. We’ve still got a fair amount of clouds in the mix as a cold front approaches, and we’ll rehash the possibility of a few strong thunderstorms during the midafternoon into early evening (mainly between 3 and 8 p.m.). Winds are light from the west-southwest around 5 to 10 mph. Confidence: Medium-High

Tonight: Any storms should exit to the east with the cold front early in the evening. The slightly cooler and somewhat drier air lags behind a bit, so we’re still relatively warm and muggy overnight, despite a light wind from the northwest. Lows drop to the upper 60s and low 70s under partly cloudy skies. Confidence: Medium-High

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Tomorrow (Monday): High pressure slowly nosing its way in from Canada brings increasing sunshine, decreasing humidity and finally a day to enjoy without the threat of rain. Mostly sunny skies prevail as highs reach the mid-80s, and winds are steady out of the north-northwest around 10 mph. Confidence: High

Tomorrow night: Dare I say, it may be a “windows open” kind of night, at least across the suburbs. Humidity continues to drop, and with mostly clear skies, we should see a rather comfortable overnight as lows settle in the low to mid-60s with just enough of a breeze to keep the air moving. Confidence: Medium-High

A LOOK AHEAD

Tuesday is another winner weather-wise. With high pressure centered overhead, skies continue mostly sunny and humidity levels sink even lower as temperatures max out in the low to mid-80s.  High pressure slips offshore Tuesday night, sending more of a southerly flow our way as the humidity creeps higher. It’s still a relatively comfortable night, with partly cloudy skies and overnight lows in the 60s. Confidence: Medium-High

Our next system begins to approach on Wednesday, ending our brief run of less humid and rain-free weather. It was fun while it lasted. Warmth and humidity are back as partly sunny skies push highs to the mid- to upper 80s. Shower and storm chances could return by afternoon or evening. Confidence: Low-Medium