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Posted at 05:00 AM ET, 06/19/2012

D.C. area forecast: Very warm today, very hot Wednesday and Thursday


Today: Partly cloudy. 85-89. | Tonight: Partly cloudy, warm. 66-74. | Tomorrow: Mostly sunny, hot, and humid. 93-97. | Get Express Forecast by E-mail


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

A decent day with some sunshine and no rain expected, but the humidity might start to get noticed. Get the Digit on Twitter| Discuss on Facebook


Prepare yourself for a high-speed heat hit over the coming days. After yesterday’s radically cool result (Dulles stayed below 70!), we are sitting in the way of a high-powered heat train, delivering the hottest weather of the year so far. The heat hits its peak on Thursday with upper 90s and some scattered 100s possible. Moderate-to-high humidity means the heat index exceeds 100. A cool front by Friday starts to derail the hot weather, leading to a warm weekend with scattered shower and storm chances.

Today (Tuesday): Our winds start their fateful turn today to begin the arduous summer process of pumping in heat and humidity. Clouds linger today, but we should see sufficient breaks to qualify as partly cloudy conditions. Highs range in the mid-to-upper 80s with light winds mainly from the south. You’ll feel that humidity increasing today too with higher dew points. Confidence: Medium-High

Tonight: A muggy night dominates with lows only dropping into the low-to-mid 70s in the city. The more fortunate suburbs should see lows dip down to the mid-to-upper 60s. Light winds from the south and southwest. Confidence: Medium-high

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

Tomorrow (Wednesday): Mostly sunny skies, hot, and humid with highs mainly in the middle 90s. The heat index peaks near 100. Keep in mind that the sun angle is at its strongest of the year right now, so it does not take much of it to burn you fast. Confidence: Medium-high

Tomorrow night: Muggy and miserable with lows ranging from the low 70s in the outer ‘burbs to the mid-to-upper 70s in the city. Light winds from the southwest are not strong enough to avoid the heavy, stagnant air mass that is settling over the area. Confidence: Medium-high


Thursday is the hottest day of the week with highs in the upper 90s in most areas, but I wouldn’t be surprised to see some official readings match or exceed the century mark (along with all bank and car thermometers). Record highs are at achievable levels of 98 for both National and Dulles. High humidity maximizes our discomfort. Despite the heat, we do expect mostly sunny skies with only a slight risk (20% chance)of a late afternoon or evening thundershower. Partly cloudy and muggy Thursday night with lows mostly in the mid-to-upper 70s. Confidence: Medium

Friday heralds the arrival of a cool front that erodes our short-lived heat wave. Partly cloudy skies with shower and thunderstorm risks mainly around midday into the afternoon (40% chance) should disrupt high temperature potential somewhat. We are looking for highs in the low-to-mid 90s currently. Humidity only gradually works out of our area Friday night with lows ranging from the 60s in typically cooler spots to the low 70s in the city. Confidence: Low-Medium

The weekend is cooler, but not nearly as nice/cool as last weekend. Highs should range in the mid-to-upper 80s on Saturday with partly to mostly sunny skies and most importantly, lower humidity. Partly cloudy Saturday night with most areas managing to reach the 60s. Mostly cloudy skies are now more favored on Sunday with showers and possible thunderstorms as a disturbance approaches the area. Temperatures are very tricky pending the path/timing of the rain. They could push into the upper 80s again or be held down closer to 80 instead. Confidence: Low-Medium

By  |  05:00 AM ET, 06/19/2012

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