D.C. area forecast: A Yankee Doodle Dandy of an Independence day as storms turn scarce

July 4, 2013

Today’s Daily Digit

A somewhat subjective rating of the days weather, on a scale of 1 to 10.

6
For summer lovers this is a sparkler of a day. For “heat/humidiphobes” like me, pretty run of the mill.

Express Forecast

Today: Partly sunny, isolated p.m. t’showers. Highs: 88-92.

Tonight: Partly cloudy, occasional evening fireballs in sky. Lows: 69-74.

Tomorrow: Plentiful sunshine, moderate humidity. Highs 89-93.

FORECAST IN DETAIL


Radar & lightning: Latest regional radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Hooray for the “Bermuda Buffer Zone”! For once that dome of high pressure and heat can be welcomed in from the Atlantic with open arms. As it pushes inland, chances for storms nose dive, beach conditions are a delight and all those mesmerizing fireworks displays should get a full viewing tonight.

For those of you on a very long weekend, Friday is just as summerific. The storms try to sneak back in from the Appalachians on Saturday but we may be able to fend them off until Sunday. Then back to your previously scheduled tropics and attendant downpours for the coming week.

Independence Day (Thursday): There is enough humidity to lead to some patches of morning fog but that quickly disappears as high pressure builds in forcing most of the main tropical moisture flow to the west. Winds from the south at 5-10 mph actually have a chance to cool us slightly.

Highs rocket up to the upper 80s to lower 90s as clouds are just scattered. Factoring in the the humidity, it feels more like the mid-90s, so hydrate if you’re spending long hours outdoors. There is still a 20% chance of rogue thunderstorms in the late afternoon or early evening but any should be brief so don’t give up on that trip to the National Mall. Confidence: High

Tonight: The skies are mainly clear and breezes out of the south at 5-10 mph help to move the smoke out of the way for great fireworks watching. I would be remiss not to mention the chance (20%) of a thundershower but fortunately, by just saying this, we should be safe! Evening readings are still in the 80s with lows to end in the upper 60s to mid-70s. Confidence: High

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

Tomorrow (Friday): This is the day where we are finally without a significant chance of a thunderstorm! Skies are mainly sunny and a brisk breeze comes out of the southwest. Humidity levels remain somewhat sticky making highs in the upper 80s to lower 90s feel more like the mid-90s. Seems wrong since this is the day in Earth’s yearly orbit that we are farthest from the sun!  Confidence: High

Tomorrow night: The stars don’t have to compete with clouds or fireworks displays. Evening readings hold in the 80s so only the hardy souls should go for the outdoor café tables. Lows only fall to the low-to-mid 70s. Confidence: High

A LOOK AHEAD

Saturday should still be a winner but our Bermuda Buffer is showing signs of weakening and this could allow thunderstorms to pop up in the afternoon and evening. Only about 30% of the area should get hit so your odds are still good to stay out of it as long as you don’t move around too much! Highs run mainly in the lower 90s with just a spot or two threatening to reach 95. Lows fall to the low-to-mid 70s. Confidence: Medium-High

Sunday is likely to see more humidity and a better chance of afternoon and evening thundershowers (40%). Highs are not deterred from hitting the lower 90s in nearly all areas. However, that is a far cry from the 105 observed at National Airport on this date a year ago, so no complaining. Lows continue to hold in the low-to-mid 70s. Confidence: Medium

Monday sees humidity ratchet back up to uncomfortable. There should be enough sun to set off afternoon thundershowers as chances climb to 50% given that the tropical flow is likely to be back in full force. Highs slip just a tad with upper 80s more common and a few lower 90s in the hot spots. Confidence: Medium

David Streit grew up on a farm/ranch in Nebraska. Witness to severe weather of all varieties focused his career path. Degrees from the universities of Nebraska and Wisconsin prepared him to be a forecaster for Capital Weather Gang as well as his day job as COO of Commodity Weather Group.
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