Tuesday, January 6, 2015

Winter Storm Surprises the DMV - January 6, 2015



The D.C. Metropolitan area experienced it’s first glimpse of winter this morning as snow blanketed the region. This clipper was predicted to produce snow totals around 1-2 inches with more snow in the northern and western suburbs, but this clipper over performed and brought with it up to 5 inches in some areas. The storm began around 5 A.M. this morning. The snow continued to fall until about noon before it began to taper off. The official snowfall total at Reagan National Airport was 2.4 inches.

This storm was caused by a weak area of low pressure called an Alberta clipper.  “Alberta clippers” are storms that have a tendency to dive south from central Canada and then cross southeast through the northern Plains. The clipper then travels through the Ohio Valley and into the Atlantic Ocean.  Clippers differ from coastal lows (nor’ easters) because they are relatively weak regions of low pressure. Since they are quick and lack oceanic moisture, they generally do not produce a lot of snow. Clippers usually produce only a dusting to an inch of snow.

With this storm brought a messy morning commute.  The Virginia Department of Transportation (VDOT) prepared with over 500 plows on the road. VDOT also began pretreating the roads last night. Although VDOT was prepared, many side streets were not plowed and were hard to navigate through this morning.

With only a couple inches in the forecast, many school systems decided to open on time today, most notably Fairfax County Public Schools (FCPS). Many people took to social media to express their frustration. At one point, “#closefcps” was trending worldwide. FCPS later released a statement apologizing for opening schools this morning.  The roads did begin to clear up the afternoon as temperatures rose slightly, making the afternoon commute a little less hectic.

For those who did get to stay home and enjoy the snow, it was quite a pretty scene outside. The storm produced a fluffy snow, which results from very cold associated air mass and low moisture content air. This type of snow is not the best for building snowmen and making snowballs, but it is easy to shovel.

The snow should stick around for a few days because temperatures are about to plummet. The high for Wednesday is around 28 degrees with wind chills in the single digits.  This cold pattern is going to continue for the rest of the week.  The good news (or bad news, depending on if you like snow) is that the rest of the week should remain sunny.  However, I advise everyone to remain cautious if you plan on heading out tonight or tomorrow morning, as many side roads have still not been treated. With temperatures dropping quickly, these roads will quickly become slick again.







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