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Cold Pattern Settles In
Withering wintry mix potential Sunday

Jason Samenow @ 12:00 PM

After the warmest September/October/November period on record in Washington, a cold regime has arrived just in time for the first day of meteorological winter. Temperatures will likely not exceed the 40s for at least a week. Despite the cold, a storm system to the west will bring mainly rain (not ice or snow) to the area beginning Sunday afternoon lasting through early Monday.


Forecast Confidence: High-Very HighMostly sunny and chilly. A Canadian airmass to the north will send down cold and dry air. A few high clouds may stream in late in the afternoon, but otherwise sunny skies will prevail, with high temperatures in the mid 40s. Overnight, it clouds over, with lows 27-33 (suburbs-city).

Pictured: Daylight moonshine behind the Capitol earlier this week. By photographer Kevin Ambrose.


Forecast Confidence: Medium-HighAfternoon rain and raw. Morning ice potential? A storm system over the Midwest will produce a band of precipitation that will likely attempt to move into the region Sunday morning when temperatures will be near freezing. However, due to very dry air aloft, most, if not all of this precipitation won't reach the ground. In other words, the first half of Sunday is likely to be dry -- although there is a 30% chance some light frozen precipitation (sleet and/or freezing rain) could fall, mainly in the north and west suburbs. By Sunday afternoon, the atmosphere will have moistened up enough for it to precipitate. But by then the predominate precipitation type will be rain (slight chance it could mix with sleet, but temperatures will be too warm for sleet to have any impact). High temperatures Sunday should be in the low 40s. Overnight, rain will continue, with lows in the upper 30s.


Forecast Confidence: HighGradual clearing, windy. Sunday's storm system will pull away well to the north, with chilly winds in its wake. High temperatures should reach the mid to upper 40s, with skies becoming mostly sunny.

A Look Ahead

  • Dry and cold Tuesday through the first half of Wednesday, with highs in the low 40s and lows in the 20s.
  • There's a chance of snow showers late Wednesday into Thursday, but too early to bring out the Snow Lover's Crystal Ball...

Another Take on Sunday's Forecast

Click Here.

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