|Dew Point:||4.0°F (-15.6°C)|
|Wind:||From the ENE at 9.0 MPH|
|Wind Chill:||-0°F (-18°C)|
|Sea Level Pressure:||26.53" (898.3 mb)|
Partly CloudyLow: 1
M.L. King Jr. Day
SunnyHigh: 15 Low: 6
SunnyHigh: 28 Low: 25
Light RainHigh: 46 Low: 39
Light RainHigh: 42 Low: 20
Partly cloudy. Low around 1, with temperatures rising to around 8 overnight. Wind chill values as low as -11. Northwest wind around 21 mph, with gusts as high as 32 mph.
Sunny, with a high near 15. Wind chill values as low as -18. Northwest wind 10 to 20 mph, with gusts as high as 32 mph.
Mostly clear, with a low around 6. Wind chill values as low as -9. Northwest wind 3 to 10 mph.
Sunny, with a high near 28. South wind 2 to 9 mph.
Mostly cloudy, with a low around 25. South wind 9 to 15 mph, with gusts as high as 22 mph.
Rain after 7am. Cloudy, with a high near 46. Chance of precipitation is 80%.
Rain. Cloudy, with a low around 39. Chance of precipitation is 90%.
Rain. Mostly cloudy, with a high near 42. Chance of precipitation is 90%.
Rain likely before 7pm, then a slight chance of snow. Partly cloudy, with a low around 20. Chance of precipitation is 70%.
... Arctic high pressure will build across the region through Tuesday. A cold front will move into the region Wednesday, with another area of low pressure moving across the area Wednesday night into Thursday.
NEAR TERM /THROUGH TONIGHT/... Strong cold front has fully crossed the area as of this afternoon as surface low traverses northeastward towards Cape Cod. This has led abrupt shift to northwest winds, as well as a sharp increase in wind speed. Temperatures have fallen into the 20s/30s this afternoon, and will continue to fall for the remainder of the day. Breaks of sun along with drying winds have acted to limit freeze-up of roadways/sidewalks, but some icy patches are possible by later today where standing water remains. Some light snow showers also continue along the Allegheny Front.
Wind Advisories remain in effect across much of our region through this evening with gusty northwest winds from 40-50 mph.
Blustery and very cold conditions continue tonight with temperatures plummeting into the single digits and teens. Thus Wind Chill Advisories/Warnings are in effect for the region, with wind chills from -5 to -15F for much of the area, and as low as -25F across the higher elevations along the Allegheny Front.
Hi-resolution models indicating some snow shower/streamer activity is re-invigorated for the first half of tonight along/near the Allegheny Front, so have kept an inch or two of additional accumulation in the forecast.
SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/... Blustery and very cold conditions persist into Monday with Wind Chill headlines continuing for the first half of the day. Despite mostly sunny skies, temperatures will struggle to rise, and highs will hold in the teens/20s.
The coldest night air-temperature wise (sans wind chill) will be Monday night as ~1040mb high pressure moves directly overhead. Near-ideal radiational cooling conditions will allow for lows to bottom out in the single digits for most locations, except below zero in the coldest locations of the Potomac Highlands and Shenandoah Valley, and in the teens in the urban centers and along the larger bodies of waters.
The high pressure will slide off to the south/east Tuesday, promoting the development of a southerly return flow. With sunshine, this will allow for rapid moderation of the air mass, and highs will be back in the 30s.
Southwest flow and warm air advection will intensify Tuesday night out ahead of an approaching frontal system. Clouds will be on the increase and some light precipitation becomes possible by morning west across portions of WV and western MD. Dependent on the amount of remaining cold air and when precipitation can start, some light freezing rain/sleet is possible.
LONG TERM /WEDNESDAY THROUGH SATURDAY/... High pressure will slide further offshore on Wednesday as a front approaches from the west. Warmer air should have spread across the region by this point, but some icy precip is not impossible early in the day. The front will stall over the region Wednesday night as one wave of low pressure passes well to our north and another develops over the Southeast and rides northeast up the front. As the wave crosses our region early Thursday, a period of heavy rain is possible, with potential for a bit of wintry weather towards the back side. Guidance has not quite settled on the exact track of the low, so this will influence future temperature and p-type forecasts, but odds favor rain for the metro, with a better chance of wintry weather well north and west. Dry weather should return behind the system Thursday night along with cooling temps.
Another front, this one more arctic in origin, will cross the region Friday. There is some potential for snow showers/squalls with it based on the latest GFS, but other guidance is not as robust with it. Behind this second front, arctic high pressure will then settle over or just south of the region for Saturday, resulting in a very cold start to the weekend. Another system will approach Saturday night, but this looks weak. With cold temps, however, whatever falls would likely be snow.