PM Update: Storms out, fog in
Sun and wind tomorrow, much cooler thereafter
originally posted at 3:25 p.m., updated at 4:40, 5:05, 5:25, 6:00, 7:40 p.m. and 10:00 p.m.
10:00 p.m. update: The threat of showers and thunderstorms is over but with abundant low level moisture and stagnant air, dense fog is expected to develop overnight. Visibilities may be reduced to 1/4 of a mile or less, so use caution.
7:35 p.m. update: A tornado warning has been issued for a storm passing through extreme southern Charles County and into St. Mary's County. This warning continues through 8:30 p.m. Anyone in the area should take cover. This appears to be the last in a series of storms rolling by on the southern periphery of the area.
Through Tonight: We'll stick with a slight risk of showers and storms (some potentially severe) into the evening, but for the most part things are winding down except maybe over south and east parts of the area. The high humidity and warm temperatures of today begin to melt away behind a cold front moving through. Lows reach the mid-50s to near 60.
Tomorrow (Thursday): Thursday is looking like a pretty nice day overall. Mostly sunny skies and temperatures rising into the mid-70s mix with light winds early. By afternoon, west winds should be increasing to about 10-20 mph with higher gusts. Temperatures also likely peak midday or early afternoon before dropping during the later part of the afternoon as much cooler air starts filtering in.
Midwest storm: While effects of the Midwest superstorm wane, the analysis of it is just beginning. Severeplains.com has put together an awesome loop of surface pressure across the upper-Midwest as the storm rapidly deepened. In addition to the awe-inspiring imagery of the system, it has spawned some debate about who gets the biggest non-tropical storms in the United States. Yes, this system broke records for Minnesota and Wisconsin, but the also-reported record U.S. pressure may not be completely true. The University of Washington's Cliff Mass claims that the Pacific Northwest is actually the home to the strongest non-tropical lows on record.
6:00 p.m. update: While the immediate D.C. area was spared from tornadic thunderstorms, locations to our south and southeast have not been as lucky. Tornado warnings were issued in Stafford, southeast Charles and central St. Mary's county earlier this evening. A waterspout was spotted just SW of Avenue, MD in St. Mary's county around 5:30 p.m. Further south, in Caroline County, Md. a tornado was seen on the ground just before 5 p.m. Additional tornadic storms have impacted the Richmond area this evening with at least one reported touchdown.
The worst of the storminess is probably over, but one more round of showers/storms well southwest of Washington may pass through the southeast suburbs in the next couple hours. A tornado watch remains in effect through 8 p.m. in these areas.
4:40 p.m. update: While much of the region has seen the weather calm compared to earlier, some storms have worked their way into the far southern sections of our area this afternoon. In particular, several rotating storms in and south of Stafford County, Va. are looking problematic. A Tornado Warning that was issued for Stafford will continue through 5 p.m. The storm may impact Charles County, Md. after crossing the Potomac River over the next hour. If you are in the path of these storms, take cover now.
3:25 p.m. update: It's been another wild weather day, but perhaps not as wild as it could have been given the Tornado Watch and all. We're seeing a break in the action right now and there is a good chance there won't be much, if anything, else to come through much of the area. Highs generally reached the low-and-mid 70s earlier today and temperatures have fallen back a bit since, though sunshine breaking back out may push them back to earlier values.
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