D.C. area forecast: Storm chances lessen today, not as humid; heat slowly builds over weekend

Today’s Daily Digit

A somewhat subjective rating of the day’s weather, on a scale of 1 to 10.

6
Temps, humidity, and storm chances all slightly lower so rank it slightly above average.

Express Forecast

Today: Decreasing clouds a.m.; 20% chance p.m. t’storm. Highs: 85-89.

Tonight: Clearing, less humid. Lows: 62-68.

Tomorrow: Mainly sunny, moderate humidity. Highs: 87-91.

FORECAST IN DETAIL

Temperature Map

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

A cold front washes out over the top of us today. As a result, the import of cool air is weak but at least it’s not as humid. With just a little luck, storms form just to our south and east today.

The string of great weekends may well break, I am sad to say. While we should avoid no more than isolated thunderstorms until Sunday, the heat and humidity creep back up to less than desirable levels. That is unless you are at the pool or beach – in that case, enjoy.

It looks like the next good cold push arrives the middle of next week preceded by more thunderstorms to keep this gardener very happy. I haven’t even had to break out the sprinkler this season!

Today (Thursday): Showers should be well to our east to start the day but clouds are expected to hang around until at least mid-morning. A light north breeze is our clue that drier air is filtering into the area. While not dramatic, the decline in the dew point (humidity) by a few degrees enhances the comfort factor notably. Sunny midday skies and only pop up afternoon clouds should allow highs to still reach mid-to-upper 80s. Thunderstorms are likely to form south and east of the District so most of us only have a 20-30% chance of getting wet (highest odds south). Confidence: Medium-High

Tonight: A pleasant evening is in the works as long as those storms stay off to the southeast as expected. Readings in the upper 70s to lower 80s with lower humidity make for good strolling weather despite calm winds. Lows reach the 60s overnight. Confidence: Medium-High

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

Tomorrow (Friday): Dry weather is a safe bet despite slightly warmer and slightly more humid conditions. Light north breezes are welcome. Mostly sunny skies only gradually give way to the scattered afternoon puff ball clouds. Highs top out in the upper 80s to lower 90s. Confidence: High

Tomorrow night: The evening is a tad warmer with readings in the lower 80s but no need to worry about any storms despite the rising of the “Thunder Full Moon”. Skies are clear and winds calm with lows in the mid-to-upper 60s. Confidence: High

A LOOK AHEAD

Saturday is a pretty typical summer day with light breezes under partly sunny skies. The humidity is back to uncomfortable but shower potential is still minimal as the main storm maker is out in the Midwest. Highs hit the upper 80s to lower 90s and overnight lows hold in the upper 60s to lower 70s. Confidence: High

Sunday continues the slow creep upward in humidity reaching fairly high levels. Plenty of sun drives readings back to the upper 80s to lower 90s. There is a decent chance (better than 50/50) of afternoon/evening thunderstorms as a squall line or two may push into the area from the previous night’s storms in the Midwest. The storms should taper off overnight with lows in the upper 60s suburbs to mid-70s downtown. Confidence: Medium

Timing thunderstorms on Monday is close to impossible but there  is a 70% chance that you will need an umbrella at some point. If the showers kick in quickly the highs might only be mid-80s but more likely they hold off until afternoon and we are treated to humidity enhanced upper 80s to lower 90s for highs. Confidence: Medium

Also on Capital Weather Gang

PM Update: Afternoon storms depart to the east, a few more possible Thursday