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| Snow covering roads, changing to sleet and freezing rain late this afternoon and evening (UPDATES) | |
| (35 minutes later) | |
| * Winter weather advisory for D.C. and S&E; winter storm warning Prince William, Fairfax, Montgomery, Howard counties and points N&W (map) * | * Winter weather advisory for D.C. and S&E; winter storm warning Prince William, Fairfax, Montgomery, Howard counties and points N&W (map) * |
| [Full D.C. area forecast for today and beyond] | [Full D.C. area forecast for today and beyond] |
| Key points | Key points |
| 2:15 p.m. update: Snow continues to fall moderate to heavy in many places. Radar shows a bit of drier air trying to work in from the west, and that combined with what short-term models show suggests that the snow may lighten during the 3-5 p.m. period. Road conditions probably don’t improve much, though, and precipitation may still get heavier again after 5 p.m., as sleet and freezing rain likely start to mix in from south to north. | 2:15 p.m. update: Snow continues to fall moderate to heavy in many places. Radar shows a bit of drier air trying to work in from the west, and that combined with what short-term models show suggests that the snow may lighten during the 3-5 p.m. period. Road conditions probably don’t improve much, though, and precipitation may still get heavier again after 5 p.m., as sleet and freezing rain likely start to mix in from south to north. |
| 1:45 p.m. update: Hopefully word has gotten out that roads stink and you are in a safe place enjoying watching the snow out your window this afternoon. The snow is piling up nicely with the National Weather Service reporting the following accumulations so far: Frederick (3″), Ellicott City (2″), Germantown (4″), Rockville (1.5″), Wheaton (1.4″), Arlington (1″), Vienna (2″), Leesburg (4″). Note that these totals are all from the 12-1 p.m. hour and have certainly grown since. Recent totals reported on American Weather have Frederick at 5″, Clarksburg at 5.4″ and Purcelville at 5.25″. | 1:45 p.m. update: Hopefully word has gotten out that roads stink and you are in a safe place enjoying watching the snow out your window this afternoon. The snow is piling up nicely with the National Weather Service reporting the following accumulations so far: Frederick (3″), Ellicott City (2″), Germantown (4″), Rockville (1.5″), Wheaton (1.4″), Arlington (1″), Vienna (2″), Leesburg (4″). Note that these totals are all from the 12-1 p.m. hour and have certainly grown since. Recent totals reported on American Weather have Frederick at 5″, Clarksburg at 5.4″ and Purcelville at 5.25″. |
| CWG’s Camden Walker has the report from the University of Maryland… | CWG’s Camden Walker has the report from the University of Maryland… |
| 1:15 p.m. update: Flakes have gone from small to big in many areas and the snow is accumulating fast. Generally we’re hearing reports so far of 2-4″ and counting in the north and west suburbs, and 1-2″ and counting from D.C. to the south and east. Snow has been especially intense north and west of D.C., but just about everyone probably sees periods of heavy snow the next few hours, during which time we could add another 2-4″ on top of what’s already fallen. Roads are awful. Stay home! | 1:15 p.m. update: Flakes have gone from small to big in many areas and the snow is accumulating fast. Generally we’re hearing reports so far of 2-4″ and counting in the north and west suburbs, and 1-2″ and counting from D.C. to the south and east. Snow has been especially intense north and west of D.C., but just about everyone probably sees periods of heavy snow the next few hours, during which time we could add another 2-4″ on top of what’s already fallen. Roads are awful. Stay home! |
| RT @Hi2213Cp: Biggest flakes I have ever seen in Ashburn, VA. pic.twitter.com/lN9WuXZbHM — Capital Weather Gang (@capitalweather) February 21, 2015 | RT @Hi2213Cp: Biggest flakes I have ever seen in Ashburn, VA. pic.twitter.com/lN9WuXZbHM — Capital Weather Gang (@capitalweather) February 21, 2015 |
| RT @Hi2213Cp: Biggest flakes I have ever seen in Ashburn, VA. pic.twitter.com/lN9WuXZbHM | RT @Hi2213Cp: Biggest flakes I have ever seen in Ashburn, VA. pic.twitter.com/lN9WuXZbHM |
| — Capital Weather Gang (@capitalweather) February 21, 2015 | — Capital Weather Gang (@capitalweather) February 21, 2015 |
| 1:20 PM #Snow | 4 Inches in Germantown, MD…2 Inches in the last hour @ABC7News @DevonLucie @JacquiJeras pic.twitter.com/4CIoU6UvgO — DMV Forecaster (@DMVForecaster) February 21, 2015 | 1:20 PM #Snow | 4 Inches in Germantown, MD…2 Inches in the last hour @ABC7News @DevonLucie @JacquiJeras pic.twitter.com/4CIoU6UvgO — DMV Forecaster (@DMVForecaster) February 21, 2015 |
| 1:20 PM #Snow | 4 Inches in Germantown, MD…2 Inches in the last hour @ABC7News @DevonLucie @JacquiJeras pic.twitter.com/4CIoU6UvgO — DMV Forecaster (@DMVForecaster) February 21, 2015 | 1:20 PM #Snow | 4 Inches in Germantown, MD…2 Inches in the last hour @ABC7News @DevonLucie @JacquiJeras pic.twitter.com/4CIoU6UvgO — DMV Forecaster (@DMVForecaster) February 21, 2015 |
| 12:30 p.m. update: The winter storm warning has now been expanded southward on the west side of D.C. to include Fairfax, Prince William and southern Fauquier counties, where the National Weather Service is calling for 3-6″ of snow, and then a trace to a few hundredths of an inch of ice. The warning, which now covers all the north and west suburbs, is in effect until 6 a.m. Sunday. 12: 10 p.m. update: Well, the current traffic pattern sure does match up well with where we’ve seen the most and heaviest snow so far… | 12:30 p.m. update: The winter storm warning has now been expanded southward on the west side of D.C. to include Fairfax, Prince William and southern Fauquier counties, where the National Weather Service is calling for 3-6″ of snow, and then a trace to a few hundredths of an inch of ice. The warning, which now covers all the north and west suburbs, is in effect until 6 a.m. Sunday. 12: 10 p.m. update: Well, the current traffic pattern sure does match up well with where we’ve seen the most and heaviest snow so far… |
| This is what happens when it snows at a decent rate with a cold ground and temperatures in the teens to near 20. Road treatments don’t accomplish much at these temperatures, and it’s hard for snow plows to keep up. | This is what happens when it snows at a decent rate with a cold ground and temperatures in the teens to near 20. Road treatments don’t accomplish much at these temperatures, and it’s hard for snow plows to keep up. |
| 11:40 a.m. update: Moderate snow continues to fall all across the area, with pockets of heavier snow especially northwest and west of D.C., with a half-inch to inch of snow already accumulated in many spots. Looking at radar and all the model information available, it sure looks like snow totals will end up toward the higher end of the ranges on our map above. Many roads are snow covered and treacherous as you can see below. | 11:40 a.m. update: Moderate snow continues to fall all across the area, with pockets of heavier snow especially northwest and west of D.C., with a half-inch to inch of snow already accumulated in many spots. Looking at radar and all the model information available, it sure looks like snow totals will end up toward the higher end of the ranges on our map above. Many roads are snow covered and treacherous as you can see below. |
| RT @SilverSpringJoe: OL beltway at the big curve. pic.twitter.com/7eVK91DQLO — Capital Weather Gang (@capitalweather) February 21, 2015 | RT @SilverSpringJoe: OL beltway at the big curve. pic.twitter.com/7eVK91DQLO — Capital Weather Gang (@capitalweather) February 21, 2015 |
| RT @SilverSpringJoe: OL beltway at the big curve. pic.twitter.com/7eVK91DQLO — Capital Weather Gang (@capitalweather) February 21, 2015 | RT @SilverSpringJoe: OL beltway at the big curve. pic.twitter.com/7eVK91DQLO — Capital Weather Gang (@capitalweather) February 21, 2015 |
| 11:10 a.m. update: Snow is now falling just about everywhere locally, and it is moderate to heavy for a good chunk of the western part of the region. It will pick up further east as an intense area of snow pushes into and through the immediate area. Rates up to and even past 1 inch per hour are a good bet in the heaviest activity. | 11:10 a.m. update: Snow is now falling just about everywhere locally, and it is moderate to heavy for a good chunk of the western part of the region. It will pick up further east as an intense area of snow pushes into and through the immediate area. Rates up to and even past 1 inch per hour are a good bet in the heaviest activity. |
| 10:50 a.m. update: Within 20 minutes of beginning, snow has become steady and is sticking to roads in the city. That’s generally the case everywhere as it begins. This is just the beginning of a lengthy slug of moisture pointed at the area with this system. | 10:50 a.m. update: Within 20 minutes of beginning, snow has become steady and is sticking to roads in the city. That’s generally the case everywhere as it begins. This is just the beginning of a lengthy slug of moisture pointed at the area with this system. |
| And while we expect temperatures to climb both aloft and here at the ground with time, ultimately changing us over to a wintry mix from snow, above freezing temperatures are nowhere to be found locally right now. | And while we expect temperatures to climb both aloft and here at the ground with time, ultimately changing us over to a wintry mix from snow, above freezing temperatures are nowhere to be found locally right now. |
| 10:25 a.m. update: We can confirm the first flakes are falling in D.C. now. Here’s a look at current conditions to the west. Be careful if out and about, everything’s turning white again rather quick. | 10:25 a.m. update: We can confirm the first flakes are falling in D.C. now. Here’s a look at current conditions to the west. Be careful if out and about, everything’s turning white again rather quick. |
| One hour later #snOMG @AccuRayno @JustinWeather @capitalweather @islivingston @FredScanner @wbalradio @MascoFromABC2 pic.twitter.com/FbOOZFUw4l — Brandy Culbertson (@majikposhun) February 21, 2015 | One hour later #snOMG @AccuRayno @JustinWeather @capitalweather @islivingston @FredScanner @wbalradio @MascoFromABC2 pic.twitter.com/FbOOZFUw4l — Brandy Culbertson (@majikposhun) February 21, 2015 |
| One hour later #snOMG @AccuRayno @JustinWeather @capitalweather @islivingston @FredScanner @wbalradio @MascoFromABC2 pic.twitter.com/FbOOZFUw4l | One hour later #snOMG @AccuRayno @JustinWeather @capitalweather @islivingston @FredScanner @wbalradio @MascoFromABC2 pic.twitter.com/FbOOZFUw4l |
| — Brandy Culbertson (@majikposhun) February 21, 2015 | — Brandy Culbertson (@majikposhun) February 21, 2015 |
| @capitalweather road conditions in Ashburn are getting to be pretty bad with moderate to heavy snow. pic.twitter.com/ND9tOASStp — kishan modali (@kishanmodali120) February 21, 2015 | @capitalweather road conditions in Ashburn are getting to be pretty bad with moderate to heavy snow. pic.twitter.com/ND9tOASStp — kishan modali (@kishanmodali120) February 21, 2015 |
| @capitalweather road conditions in Ashburn are getting to be pretty bad with moderate to heavy snow. pic.twitter.com/ND9tOASStp | @capitalweather road conditions in Ashburn are getting to be pretty bad with moderate to heavy snow. pic.twitter.com/ND9tOASStp |
| — kishan modali (@kishanmodali120) February 21, 2015 | — kishan modali (@kishanmodali120) February 21, 2015 |
| @capitalweather Frederick is coated pic.twitter.com/rvHoLCCZmp — Devin Moore (@devinnotkevin) February 21, 2015 | @capitalweather Frederick is coated pic.twitter.com/rvHoLCCZmp — Devin Moore (@devinnotkevin) February 21, 2015 |
| @capitalweather Frederick is coated pic.twitter.com/rvHoLCCZmp | @capitalweather Frederick is coated pic.twitter.com/rvHoLCCZmp |
| — Devin Moore (@devinnotkevin) February 21, 2015 | — Devin Moore (@devinnotkevin) February 21, 2015 |
| @capitalweather Check out the snow on route 27! pic.twitter.com/DIV2afIV9G — Carroll County (@CarrollWeather) February 21, 2015 | @capitalweather Check out the snow on route 27! pic.twitter.com/DIV2afIV9G — Carroll County (@CarrollWeather) February 21, 2015 |
| @capitalweather Check out the snow on route 27! pic.twitter.com/DIV2afIV9G | @capitalweather Check out the snow on route 27! pic.twitter.com/DIV2afIV9G |
| — Carroll County (@CarrollWeather) February 21, 2015 | — Carroll County (@CarrollWeather) February 21, 2015 |
| 2 inches 4 miles WSW of Front Royal. Moderate snow. @alexliggitt @NWS_BaltWash @capitalweather pic.twitter.com/0FAbrgZy55 — Mike Stinneford (@MikeSABC7wx) February 21, 2015 | 2 inches 4 miles WSW of Front Royal. Moderate snow. @alexliggitt @NWS_BaltWash @capitalweather pic.twitter.com/0FAbrgZy55 — Mike Stinneford (@MikeSABC7wx) February 21, 2015 |
| 2 inches 4 miles WSW of Front Royal. Moderate snow. @alexliggitt @NWS_BaltWash @capitalweather pic.twitter.com/0FAbrgZy55 | 2 inches 4 miles WSW of Front Royal. Moderate snow. @alexliggitt @NWS_BaltWash @capitalweather pic.twitter.com/0FAbrgZy55 |
| — Mike Stinneford (@MikeSABC7wx) February 21, 2015 | — Mike Stinneford (@MikeSABC7wx) February 21, 2015 |
| 10:10 a.m. update: Snow is coming, about right on schedule. The front edge is currently lined up with I-95 and is about to push east across the city. We can’t stress enough that this is all sticking immediately, and untreated roads/sidewalks/etc. are likely to become a problem pretty quick. | 10:10 a.m. update: Snow is coming, about right on schedule. The front edge is currently lined up with I-95 and is about to push east across the city. We can’t stress enough that this is all sticking immediately, and untreated roads/sidewalks/etc. are likely to become a problem pretty quick. |
| It has begun in earnest in Reston. @capitalweather — Brian McNicoll (@McNicollb) February 21, 2015 | It has begun in earnest in Reston. @capitalweather — Brian McNicoll (@McNicollb) February 21, 2015 |
| It has begun in earnest in Reston. @capitalweather | It has begun in earnest in Reston. @capitalweather |
| — Brian McNicoll (@McNicollb) February 21, 2015 | — Brian McNicoll (@McNicollb) February 21, 2015 |
| Lightly snowing in Manassas, starting to cover the road already. @capitalweather @WTOP #longdayahead pic.twitter.com/VpAojPhMQZ — Angie Wanner (@angielynn10) February 21, 2015 | Lightly snowing in Manassas, starting to cover the road already. @capitalweather @WTOP #longdayahead pic.twitter.com/VpAojPhMQZ — Angie Wanner (@angielynn10) February 21, 2015 |
| Lightly snowing in Manassas, starting to cover the road already. @capitalweather @WTOP #longdayahead pic.twitter.com/VpAojPhMQZ | Lightly snowing in Manassas, starting to cover the road already. @capitalweather @WTOP #longdayahead pic.twitter.com/VpAojPhMQZ |
| — Angie Wanner (@angielynn10) February 21, 2015 | — Angie Wanner (@angielynn10) February 21, 2015 |
| Nacho checking out the falling snow on Ashburn. #loudoun @capitalweather @WTOP #vasnow pic.twitter.com/pWYI80lYtn — Guillermo Meneses (@Gil_Meneses) February 21, 2015 | Nacho checking out the falling snow on Ashburn. #loudoun @capitalweather @WTOP #vasnow pic.twitter.com/pWYI80lYtn — Guillermo Meneses (@Gil_Meneses) February 21, 2015 |
| Nacho checking out the falling snow on Ashburn. #loudoun @capitalweather @WTOP #vasnow pic.twitter.com/pWYI80lYtn | Nacho checking out the falling snow on Ashburn. #loudoun @capitalweather @WTOP #vasnow pic.twitter.com/pWYI80lYtn |
| — Guillermo Meneses (@Gil_Meneses) February 21, 2015 | — Guillermo Meneses (@Gil_Meneses) February 21, 2015 |
| 9:40 a.m. initial post: Snow is racing through the area, now about to meet up with most of the I-95 corridor. Thus far, snow is mainly light to occasionally moderate in intensity, but some heavier bursts are also embedded. | 9:40 a.m. initial post: Snow is racing through the area, now about to meet up with most of the I-95 corridor. Thus far, snow is mainly light to occasionally moderate in intensity, but some heavier bursts are also embedded. |
| Short-term modeling and weather radar both suggest we’re in for a snowy rest of the daylight period. | Short-term modeling and weather radar both suggest we’re in for a snowy rest of the daylight period. |
| Below is a look at what the HRRR thinks radar will do into the evening. Note that it expects snow to hang on into evening before any major changeover, something we also anticipate ourselves. | Below is a look at what the HRRR thinks radar will do into the evening. Note that it expects snow to hang on into evening before any major changeover, something we also anticipate ourselves. |