Heat Advisory Today Noon to 7pm

Today’s Daily Digit

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

3
You can salvage the day with a dip in the pool. Otherwise way too hot and humid, and could be stormy late.

Express Forecast

Today: Mostly to partly sunny, very hot and humid. 50% chance of p.m. storms. Highs: Mid-to-upper 90s.

Tonight: 50% chance of storms. Lows: 70s.

Tomorrow: Humid with occasional showers and storms likely. Highs: Upper 80s to low 90s.

FORECAST IN DETAIL

The heat is on and the atmosphere is oozing with moisture today. That means any storms this afternoon into evening could be severe, but there’s now a chance storms will be less numerous than previously thought. Showers and storms remain a threat tomorrow and tomorrow night as Tropical Storm Arthur tracks up the coast. The D.C. area looks to avoid a direct hit, but could see enhanced rain and storms Thursday into Friday morning. We remain cautiously optimistic we’ll dry out for July 4th festivities Friday afternoon and night, while a superb weekend looks close to a slam dunk.

Temperature Map

Temperatures: Latest D.C. area temperature map. See interactive map on our Weather Wall.

Today (Wednesday): The heat-and-humidity combo is a brutal one today, as mostly to partly sunny skies help morning temperatures rise quickly into and through the 80s, and afternoon highs surge to the mid-to-upper 90s. A light breeze from the south near 5-10 mph keeps the high humidity locked in and sends the afternoon heat index into the 100-105 range. Scattered storms may develop in the afternoon (50% chance) mainly after 3 p.m. or so. Any storms will be capable of producing torrential rain, damaging winds and large hail. Confidence: Medium-High



Tonight: As of yesterday, storms looked close to a sure bet this evening. We still could see a number of storms develop, but some modeling indicates storms may not be as numerous as once thought, so we’ll hold the chances at 50% through the overnight. Right now it’s hard to pinpoint any particular time as the most likely for storms. Any storms that do develop continue to have the potential for heavy rain, damaging winds and large hail. Storms may knock down evening temperatures earlier in some places than others. But no one gets much below the low-to-mid 70s for overnight lows, and in fact downtown may not get below the mid-to-upper 70s. Confidence: Medium

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

Tomorrow (Thursday): Occasional showers and scattered thunderstorms are likely, as the front slows down nearby and Arthur moves up the coast from the south. Partly to mostly cloudy skies should help stabilize the atmosphere a bit, but storms could still be strong with tropical-enhanced heavy rain posing a flood risk. Humidity stays high, but the heat should relent somewhat with highs in the upper 80s to low 90s. Confidence: Medium

Tomorrow night: Depending on the eastward progress of the front or lack thereof, occasional showers and storms may linger Thursday night, with day-night rain totals potentially topping 1 inch. Eventually the drying process should begin as winds turn to come form the northwest and lows fall back to the mid-60s to low 70s. Confidence: Low-Medium

A LOOK AHEAD

While the Fourth of July forecast remains a close call, modeling continues to suggest Arthur will track far enough east to keep us rain-free Friday afternoon and night after a 40% chance of morning showers. Friday afternoon highs head for the low-to-mid 80s as sun increases and humidity decreases, while Friday evening temperatures falling through the 70s should be fantastic for fireworks. Still enough uncertainty with the Friday forecast that you’ll want to check back. Confidence: Low-Medium

Saturday and Sunday could hardly look nicer at this point. High pressure is poised to deliver mostly sunny skies with highs in the 80s and humidity in check. Saturday night lows settle in the 60s. Confidence: Medium-High

(Forecast prepared overnight)