The late morning to midday shower activity that crossed the area helped keep temperatures from reaching their full potential thanks to the extra clouds around. However, we’re still reaching highs in the mid-to-upper 80s. As of now, that 6th in a row 90-degree day at D.C. seems to be slipping away, though it’s still possible we make it. Either way, another one is on tap for tomorrow, which should probably be expected given that we’re now entering into the warmest time of the year as per new 1981-2010 climate normals.
Through Tonight: A risk of a shower or storm lasts into the evening, but it looks like they’ll be quite isolated if they occur. Otherwise, it’s partly cloudy overnight (maybe a spot or two of fog late) with lows reaching the upper 60s to near 70 in the suburbs and the mid-or-upper 70s downtown.
Tomorrow (Thursday): We should see more sun during the first half of the day than today, which helps boost temperatures higher. As a cold front approaches, clouds are on the increase in the afternoon into evening along with a growing (60%) threat of showers and storms. A major severe weather event is not anticipated, but damaging wind is possible in the strongest storms, perhaps some hail. Most spots should head for the low 90s, but a few places could reach the mid-90s if we get enough sunshine.
Final space shuttle launch: Shuttle Atlantis is getting prepared for the final space shuttle mission ever. Yet, there is a growing concern that weather may prevent the shuttle from lifting off. As of today, there is a 70% chance that storms could impact the launch site around 11:26 a.m., when it’s scheduled to go. Nonetheless, the countdown continues.
Pollen update: Walter Reed’s Susan Kosisky reports, “Tree pollen is LOW at 0.32 gr/cubic meter, grass pollen is LOW (NAB range) at 2.88 gr/cubic meter which is more moderate for our local area pollen count. Weed pollen is LOW at 2.56 gr/cubic meter and mold spores are in the MODERATE range at 7710.18 spores/cubic meter.”