Ahead of a cold front, temperatures touched the 90-degree mark for just the third time this month at Reagan National. Between tonight and midday Friday, we could see an isolated shower (even a rumble) as the cold front moves through. Then, we welcome dry, delightful and, ultimately, cooler air.
Through Tonight: Isolated thundershowers are possible through sunset, mostly southeast of I-95 towards the Bay (30 percent chance; 10-20 percent chance elsewhere). For the rest of the night, it’s partly cloudy and mild, with a 20 percent chance of an isolated shower, mainly towards morning. Lows range from 66-71(suburbs-city) with moderate-to-high humidity. Light winds from the west.
Tomorrow (Friday): We have a 20 percent chance of a shower in the morning, mainly south of the District. Otherwise, expect partly cloudy skies and a slow reduction in humidity from north to south. Highs are in the mid-80s, with winds coming in from the north at around 10 mph by afternoon.
Pollen: Tree and grass counts are LOW, weeds are MODERATE-HIGH, mold spores are MODERATE-HIGH
50th anniversary of failed hurricane modification experiment: Blogs NOAA’s Hurricane Research Division:
On Aug. 23, 1963, Project STORMFURY (a joint Weather Bureau/U.S. Navy hurricane modification program) carried out the first of a two-day seeding experiment on Hurricane Beulah. At the time Beulah was nearly a thousand miles southeast of Bermuda and heading north. Eleven aircraft carried out elaborate monitoring patterns as Navy A3-D jets delivered 400 pounds of silver iodide to the hurricane’s eyewall. Little change was noted and, by the second day, the hurricane reached its peak intensity.
Hurricane modification – which has never been proven possible – has a controversial past. Read these pieces by CWG’s Steve Tracton for background: