|Dew Point:||32.0°F (0.0°C)|
|Sea Level Pressure:||27.13" (918.6 mb)|
Scattered Rain ShowersHigh: 48 Low: 38
Scattered Rain ShowersHigh: 49 Low: 42
Mostly SunnyHigh: 61 Low: 51
SunnyHigh: 69 Low: 56
Slight Chance Rain ShowersHigh: 68 Low: 53
Scattered rain showers. Mostly cloudy, with a high near 48. South wind around 18 mph, with gusts as high as 28 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Scattered rain showers. Mostly cloudy, with a low around 38. Southwest wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Scattered rain showers. Mostly cloudy, with a high near 49. Northwest wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Isolated rain showers before midnight. Mostly cloudy, with a low around 42. Northwest wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Mostly sunny, with a high near 61. Northwest wind around 10 mph.
Mostly clear, with a low around 51.
Sunny, with a high near 69.
Mostly clear, with a low around 56.
A slight chance of rain showers after 8am. Mostly sunny, with a high near 68.
... Low pressure will drift over the area this weekend. High pressure will briefly return early next week, then a cold front will approach from the north during the middle of the week.
NEAR TERM /THROUGH TONIGHT/... Surface low pressure resides over West Virginia this morning as a frontal boundary bisects our CWA. Southerly flow continues across the area under a mix of clouds and sun thanks to plentiful mid-high level clouds. Temperatures are in the low to middle 60s with dewpoints not far off, resulting in a touch of humidity across the region. Given the available moisture in place, limited instability within the boundary layer, we have seen isolated to scattered shower activity across the northern tier of the CWA this morning. This activity is currently trending downward, and will continue to do so over the next several hours, with much of the area remaining dry through the bulk of the afternoon. The 12z IAD sounding sampled a sizeable dry layer between ~400-700mb, which is acting to suppress any vertical growth of the aforementioned showers. Expect highs this afternoon to top out in the upper 60s to lower 70s.
The primary upper trough to our west will inch closer late this afternoon and evening, helping trigger shower development across portions of the Potomac/Virginia Highlands, central Blue Ridge, and the Central Foothills. Much of the shower activity will remain west of the Blue Ridge into this evening, and any accumulation will be held to a tenth of an inch or less. Skies will be mostly cloudy overnight, with lows falling into middle 40s to near 50 degrees in the cities.
SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/... Surface low pressure will lift northeastward as upper low slowly moves overhead. Low 1000-500 mb thicknesses and 850 hPa temps dropping to near 0 C are quite low for this time of year, and are indicative of instability under the upper low. Scattered showers seem likely Sunday as a result, and can't rule out a little graupel either given the low freezing levels.
The upper low will finally push eastward offshore early next week as high pressure builds from the Ohio Valley to just south of the Mid-Atlantic. This should result in dry weather and warming temperatures, although a few showers are still possible Monday mainly east of I-95.
LONG TERM /TUESDAY THROUGH FRIDAY/... High pressure over the southeastern United States will be in control of the weather on Tuesday as a weak low pressure system moves eastward through the Great Lakes, its attendant cold front moving into the Ohio Valley. This will lead to dry and warm conditions with highs likely reaching the upper 70s to low 80s.
The low will then pass eastward across the northeastern US on Wednesday, with the cold front moving near the region. Thus some showers/thunderstorms become possible on Wednesday. It should still be quite warm with highs once again in the upper 70s to low 80s.
The front will then likely stall out near the region on Thursday before a disturbance moves along it on Friday. This will keep chances for showers/thunderstorms in the forecast through the end of the week. Temperatures will be dependent on the frontal boundary location, but will show 70s for now.