Astronomical autumn begins with the fall equinox, the moment when Earth’s tilt relative to the sun places neither hemisphere in favor. Day and night are nearly equal in length,
Each autumn, clocks across most of the United States and Canada move back one hour as Daylight Saving Time ends. The shift marks the seasonal transition toward shorter days and
For DC-area residents, the arrival of the first freeze, the first sustained dip to 32 degrees or lower, is a key marker in the transition from autumn into winter. It
The final freeze of the season, the last time temperatures dip to 32 degrees or lower in spring, is closely watched by gardeners. It marks the unofficial start of planting
Astronomical summer begins with the summer solstice, the moment when the Northern Hemisphere is tilted most directly toward the sun. It’s the longest day of the year in terms
Astronomical spring officially begins with the spring or vernal equinox, a milestone that announces the transition from winter to spring in the Northern Hemisphere. The equinox, occurring around March 20
Astronomical winter begins with the winter solstice, the moment when the Northern Hemisphere is tilted farthest away from the sun. It marks the shortest day and longest night of the
If forecasting snow were easy in DC, we’d do it with far more confidence — and far fewer caveats. Instead, the area sits in one of the most challenging winter-weather
Every winter, when a big snowstorm looms, one question frequently pops up: Could we get thundersnow?
Thundersnow is exactly what it sounds like: thunder and lightning occurring during a snowstorm
Most thunderstorms in the DC, area come and go with little fanfare, bringing a burst of heavy rain, lightning and maybe gusty winds. But occasionally, storms organize into a fast-moving,
Each year in March, clocks across most of the United States (and Canada) move forward one hour as Daylight Saving Time begins. The shift marks a seasonal turning point, trading
