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D.C. area forecast: 90s return before a stormy Thursday, cooler weekend

A beautiful Shenandoah sunrise. (Tyler Reber via Flickr)

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

3/10: Weekend ends, but summer heat doesn’t bend.

EXPRESS FORECAST

Today: Hotter, mostly sunny. Highs: 89-93.
Tonight: Partly cloudy, muggy. Lows: 72-76.
Tomorrow: Hot again, but late p.m. storms. Highs: 88-92.

FORECAST IN DETAIL

Just like last year, we’re getting a decent last-minute surge of summertime heat deeper into the first part of September. We’ll be aiming for more 90s today and tomorrow with moderate to high humidity levels to keep the air conditioning working hard. Then we’ll watch a big cold front approach later tomorrow and Thursday with the potential for widespread showers and storms that we haven’t seen much lately.

By Friday, our temperatures downshifts to the 80s with lower humidity leading into a more comfortable and seasonal weekend. However, another cold front and an associated low pressure area bring some rain by Sunday, but we need it after a dry August and slow-starting September.

Today (Tuesday): As we kick off this abbreviated workweek, we continue to contend with some strong late-summer heat. Mostly sunny skies and a very warm morning give us a jump-start for temperatures to get up into the lower to middle 90s range. Moderate to high humidity means it will feel like the upper 90s at times too, so stay hydrated and sun-protected as much as possible outdoors. Light winds blow from the southwest at 5 to 10 mph. Confidence: High

Tonight: A few clouds blot out the stars at times as our warm and muggy air mass keeps the discomfort high. Lows only reach the low to middle 70s by sunrise. Light breezes from the southwest at 5 to 10 mph don’t do much to quell the warmth. Confidence: High

For related traffic news, check out Dr. Gridlock. Keep reading for the forecast through the weekend…

Tomorrow (Wednesday): Mostly sunny in the morning, becoming partly sunny by afternoon. Hot and muggy with highs in the upper 80s to low 90s. Some scattered showers or thunderstorms pop up by late afternoon into the evening, especially south and west of the city. Winds from the south and southwest direction at 5 to 10 mph. Confidence: Medium-High.

Tomorrow night: Partly to mostly cloudy with continued scattered showers and storms that could even be seen late at night. Lows range through the 70s as high humidity levels continue. Confidence: Medium-High

A LOOK AHEAD

Thursday aims for the wettest day of our workweek with ongoing showers and storms with the most coverage in the afternoon to evening. Some thunderstorms could be strong with very heavy downpours. Rainfall totals could run higher than we’ve seen since July or maybe even June. Highs should range through the 80s and humidity stays moderate to high yet. Scattered showers and storms chances continue into the evening hours with partly cloudy skies overnight as lows dip slightly cooler into the middle to upper 60s. Confidence: Medium

Friday should be just fine with partly sunny skies, much lower humidity and highs only in the lower to middle 80s. Friday night aims for just a few clouds around and much more comfortable temperatures that range widely from the middle 50s in the outer suburbs to the middle 60s in the city. Confidence: Medium

The weekend starts off fairly decent as Saturday delivers partly to mostly sunny skies, temperatures in the low 80s and low humidity. Saturday night is favored for partly cloudy skies with lows in the 60s. Sunday is the trickier story as some guidance suggests a second cold front and associated low pressure could bring more rain (highs in the 70s), while others keep it partly to mostly sunny with highs again in the low 80s. So far it looks like the warmer and drier route will prevail, but confidence is on the low side for that day. Confidence: Low-Medium

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