4:40 p.m. update: Flash flood warning for central Prince George’s county until 7:30 p.m. Locations under warning include Clinton, Andrews AFB, Upper Marlboro, Landover, Largo and Marlton. Doppler radar indicates 1-2” of rain has fallen in these areas, with more possible as responsible thundershower drifts slowly southeast. Remember never drive through flooded roadways.
For most of the daylight hours, showers and storms have surrounded and skirted the area but relatively few have passed through. While we stay with a chance of showers and t’storms into the evening before they tend to wind down overnight, it seems many spots might not get much in the way of rain today. The slow-moving storm system departs off the northeast tomorrow, but we probably don’t kick the rain threat completely just yet.
Through Tonight: Showers and storms continue to be a threat (40-50% chance) through the early evening. Any rain should be rather slow moving, so localized flooding – especially were it’s already rained a lot – continues to be a concern as well. As the atmosphere settles down late evening toward midnight, the risk of rain should drop to slight. If you’re out at 8:45 p.m., take a look to the sky and you may see the ISS pass by, but we’ll probably have mostly cloudy skies and continue with them through the night. Temperatures should reach the lower 60s in the cooler suburbs to the upper 60s or near 70 downtown.
Tomorrow (Tuesday): Clouds may still be rather numerous in the morning, but as noted, the storm system will continue to depart off to the northeast. So, overall, we probably see a partly cloudy day (more sun late than early?). One kink could be isolated showers and storms by afternoon as the surface warms enough to percolate into remnant cold air aloft. Highs should reach the mid-to-upper 80s.
Tropics: Gert, the 7th named tropical system of the season, is spinning away from Bermuda this afternoon on its way to its demise in the North Atlantic Ocean. Still, it’s doing better today than it was prior and with sustained winds of 60 mph, it is close to the strongest system we’ve seen all season (65 mph, with Arlene and Bret). Forecasts call for it to remain just shy of hurricane force, and if it does that we’ll have a new record for most named systems with no hurricanes with seven, though it’s possible it happened before the use of satellites and no one noticed.
Pollen update: All pollen counts are LOW today thanks to recent rain.