PM Update: Humid Tuesday, with a chance of storms

Temperature Map

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

Today’s temperatures near 80 were quite delightful thanks to manageable levels of humidity and a breeze. A proper cap to several days featuring pleasant weather across the region. On Tuesday we’re reminded that meteorological summer is here, as we get a taste of summertime humidity and storm chances.

Through Tonight: Clouds increase as we head through the evening and into the night, but we’re no worse than partly cloudy on average. A south wind goes to work on moistening up the atmosphere, and that helps keep lows from dipping past the near 60 to mid-60s range in most spots. Those winds are fairly light though, only around 5 mph or less most of the night.

Tomorrow (Tuesday): Hope you enjoyed another low-humidity one today, as high humidity roars back on Tuesday. Under partly cloudy skies, we head for afternoon readings mainly in the mid-to-upper 80s, and it’ll feel rather sticky as well. A few showers (20% chance) are possible in the morning, but the main risk (50% chance) comes later. It’s not certain storms will form, though the most likely time is midday or afternoon, perhaps again after dark.

See Jason Samenow’s forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter . For related traffic news, check out Dr. Gridlock.


The Capitol on May 31. (Joe Flood via Flickr)

Pollen update: Tree pollen is moderate at 33.23 grains/cubic meter of air. Grass pollen is moderate/high, weed pollen is low, and mold spores are also low.


Severe weather outlook for Tuesday. (Storm Prediction Center)

Severe weather outbreak expected: It has been a quiet year for tornadoes, with numbers about as low as we ever see to start June. But that doesn’t mean storms can’t happen this year, and tomorrow has potential to be quite a severe weather day across the central Plains and into parts of the midwest. The threat ramps up tomorrow afternoon, when supercells are expected to develop in Nebraska and surrounds. Initial risks will include all types of severe weather, including the potential for strong tornadoes. As time goes on, storms are expected to coalesce into a damaging wind event that sweeps east into the night.

Ian Livingston is a forecaster/photographer and information lead for the Capital Weather Gang. By day, Ian is a defense and national security researcher at a D.C. think tank.
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Jason Samenow · June 2, 2014

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