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Posted at 3:30 PM ET, 01/20/2010

PM Update: Temperatures cool ahead of storm

By Ian Livingston

Main wintry threat arrives late Thurs., continues into Fri.

* Wintry mix could cause mess | Coleman's climate conspiracy theory *
* Outside now? Radar, temps & more: Weather Wall *

Some light early-morning wintry precipitation aside, today was another calm one around here, but that's not going to last too much longer. Temperatures have cooled back toward normal, with highs only reaching the low-and-mid 40s across much of the area. After another potential round of light conversational wintry precipitation tonight, all eyes turn toward the chance of a more significant wintry mix late tomorrow into Friday, the possibility of which has already prompted a Winter Storm Watch well north and west of D.C.


Radar: Latest regional radar shows movement of precipitation over past three hours. Powered by HAMweather. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Through Tonight: Clouds increase through the evening ahead of a weak disturbance moving in from the west. Some mixed precipitation (rain, sleet or snow) may try to sneak in between late evening and morning, though it should mainly stay south of the area. Lows fall to the upper 20s and lower 30s.

Tomorrow (Thursday): After some possible early-morning mixed precipitation in the southern part of the area, we should see a few breaks in the clouds before things trend back to cloudy as the day progresses. Temperatures will shoot for the lower 40s before additional wintry weather (rain, sleet and/or snow) begins to arrive during the late afternoon or evening.

See Dan Stillman's full forecast through the weekend. And if you haven't already, join us on Facebook and follow us on Twitter.

California severe weather: The storm set to affect us late tomorrow and into Friday swept through Southern California with a bang yesterday. Though quick-moving, it produced heavy rain, uprooted trees and spawned at least one tornado as well as causing wind gusts up to 80 mph.

By Ian Livingston  | January 20, 2010; 3:30 PM ET
Categories:  Forecasts  
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Next: Update: Chance of accumulating snow dropping

Comments

Where did the Friday lollipops go?

Posted by: manassasmissy | January 20, 2010 5:11 PM | Report abuse

Current radar is looking interesting...

Posted by: spgass1 | January 20, 2010 6:18 PM | Report abuse

@spgass1

The radar does look interesting, especially if you live well south of DC. It appears that the movement of the precipitation shield is now becoming more west to east than south to north. Some mixed precipitation falling in central VA.

Concerning the system for Thursday/Friday: A lot of model discrepancies. The latest runs of the major models gives DC proper anywhere from a good cold rain to a nasty mixed bag of rain/freezing rain/ sleet and snow. The least likely scenario appears to be significant accumulations of snow, although it appears most models give at least a small window of snow near the end of the period. The greatest chance of wintry precipitation is still the tried and true "North and West" of the city. The I81 corridor stands the best chance of significant ice/snow accumulations. With a fairly good CAD scenario evolving in the next 24 to 36 hours, and the upper air being warm, mixed is the likely scenario for our area with the south and east suburbs receiving the most precipitation with the greatest uncertainty to the type of precipitation.
But then again... what do I know about the weather???

Posted by: pjdunn1 | January 20, 2010 7:12 PM | Report abuse

We have sleet mixed in with the rain down in Spotsylvania. I have a layer of sleet on my deck right now.

Posted by: panthersny | January 20, 2010 8:01 PM | Report abuse

The comments to this entry are closed.

 
 
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