D.C. area forecast: More humidity today, storms tomorrow, then nicer by Thursday

June 24

Today’s Daily Digit

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

7
Bit more heat and humidity, but sunshine and limited rain risks. Still soft for summer D.C. standards

Express Forecast

Today: Partly sunny (isolated late day storm?). Highs: 86-90.

Tonight: Partly cloudy, muggy. Lows: 67-73.

Tomorrow: Cloudy, humid, p.m. storms likely. Highs: 85-89.

FORECAST IN DETAIL

Temperature Map

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

High pressure slides offshore today as a cool front in the Midwest edges our way.  This gives us a brief burst of higher humidity level the next two days with showers and thunderstorms preceding the front tomorrow into tomorrow night.  Conditions improve Thursday with lower humidity and more sunshine.  Another round of heat aims for our area by this weekend, but the exact timing is uncertain.  Humidity should slowly inch back up through the weekend period with some chances for scattered afternoon and evening showers and storms.

Today (Tuesday):  Breezes blowing in from the south at 5 to 10 mph deliver warmer and more humid conditions, but still not at the summer unbearable levels that we can sometimes see.  Partly sunny skies prevail as temperatures advance to the middle to upper 80s, but a few spots could touch 90.  Dew points during the afternoon peak temperatures should be in the more humid middle to upper 60s.  And there is a 20% chance of a scattered late afternoon or evening shower or thunderstorm.  Confidence: Medium-High

Tonight: Partly to mostly cloudy skies (as the cool front edges closer to us) mean that temperatures do not cool as much.  Lows only reach down to the middle to upper 60s in the outer suburbs to the low or maybe even mid-70s in the city with higher humidity conditions.  Light breezes from the south at 5 to 10 mph again.  Confidence: Medium-High

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

Tomorrow (Wednesday): Hump day is humid with dew points holding in the upper 60s and low 70s as partly sunny skies in the morning transition to cloudy for the afternoon.  Those clouds at least prevent us from getting too hot with middle to upper 80s favored, but look out for widespread mid-afternoon to evening showers and storms, some of which could deliver some heavy downpours.  Light breezes continue from the south and southwest.  Confidence: Medium

Tomorrow night: Scattered showers and storms continue through the evening hours before ending with total quantities expected to range from .25″ to .5″, locally up to 1″ or so.  Shifting to partly cloudy overnight, but a few lingering showers still possible as lows range from the middle 60s to low 70s (but humidity wanes at least). Confidence: Medium

A LOOK AHEAD

Thursday seems fairly decent for now with partly to mostly sunny skies as highs pop to the middle to upper 80s.  Lower humidity improves the comfort factor too.  Any day in meteorological summer that doesn’t burn up through the 90s or touch 100 should be considered quite nice! Thursday night looks to experience partly cloudy skies with lows ranging through the more comfortable 60s.  Confidence: Medium-High

Friday features partly sunny conditions with highs in the middle to upper 80s along with a chance (about 30%) of late afternoon or evening showers/storms as a little upper level instability returns to the area.  Friday night aims a bit warmer and partly cloudy with lows in the middle to upper 60s in the suburbs to low 70s in the city. Confidence: Medium

The weekend still offers some forecast fuzziness as the leading guidance debates the timing of the next round of heat/humidity and storm risk arrival.  We’ll take some cautious middle ground and favor partly sunny skies both days with highs in the middle to upper 80s along with a 40% chance of afternoon showers and storms popping up around the area.  There is a chance that some locations could hit 90F by Sunday with a warmer flow setting up.  Lows Saturday night should again range from the middle to upper 60s to the low 70s (about 1-2F warmer than Friday night’s levels overall).  Confidence: Low-Medium

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