5:10 p.m. — High water rescues reported in central Prince George’s County after 3 inches of rain in just over an hour
A slow-moving thunderstorm with torrential rain plowed through north central Prince George’s County and unloaded over 3 inches of rain just north of Landover, prompting a flash flood warning. The National Weather Service reported that Prince George’s County Fire and Rescue was deploying boats to conduct water rescues along MD-201 Kenilworth Avenue between MD-450 Annapolis Road and MD-410 Riverdale Road. “Seven vehicles were stranded,” the Weather Service wrote. “Police have closed the road.”
The responsible thunderstorm has moved south and southeast of the flash flood warning zone and has weakened somewhat.
Still, stay weather-aware into this evening as, with the air being so humid, widely scattered storms could continue to unleash heavy rain and cause a few localized flooding issues.
We picked up yet another 90-degree day, and high humidity made it feel even hotter. Heat indexes were around 100 this afternoon. Near instant sweat, then lots more to follow. The high temperatures have mixed with high humidity to cause a few intense showers and storms in the area this afternoon. They’ll wane with sunset. We do it all again Tuesday.
Through Tonight: A shower or storm will pester a few spots into evening. Many pop up and die off quickly but some could dump a few inches fast, causing some isolated flooding. This activity should mainly wane by sunset. With humidity holding the warmth in, lows are far from low. They end up mainly in a mid-70s to near 80 range.
Tomorrow (Tuesday): It will be something of a repeat of today, but perhaps a somewhat hotter version. Partial sunshine and murky air will lead to billowing clouds producing showers and storms in the afternoon. A few storms could be strong to severe, with the main threat outside being lightning, heavy rain and isolated damaging wind. Before any rain, temperatures will head for the low and mid-90s. Heat index values will be near or above 100 at peak.
Pollen update: Mold spores are low/moderate, as is weed and grass pollen. Tree pollen is low.
90-degree days: Over the past 30 days, there have been 17 days at or above 90, compared to about 15 normally. While the District continues to run somewhat below average to date, we’re closing in with 27 through today. Per the 1991-2010 averages used by the Weather Service, the city is running two behind the typical 29 to date.
27 days this summer at or above 90 in DC, including today. Closing in on average to date, but once we get past the next few days none on the horizon at the moment.