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There is a Winter Storm Advisory in effect for North Texas until noon Monday. Check back here regularly for updates as the weather system moves across the region.

10:19a Planes de-iced at the south end of Dallas/Fort Worth International Airport Monday morning before taking off into the frigid north wind. They climbed out over ice dripping from tree branches and fences.

Airport officials reported that airlines proactively canceled about 180 flights Monday, on top of 300 the day before.

That forced a tour group of about 50 travelers to split up and fly into alternative airports before linking up in New York to fly to Madrid. Still, they were grateful for the advance notice, and lack of serious icing Monday. - Reporter Jim Douglas

'It's going to be a long, long day,' they said at 3:30 a.m., waiting in Terminal C for ticket counters and the security checkpoint to open. The180 canceled flights represents about 20 percent of daily departures from DFW Airport.

9:14a Oncor reports Bebesnee Elementary School and Boles Junior High School in Arlington are without power, as is Annie Webb Blanton Elementary in Dallas.

8:27a Roughly 14,000 residences inDallas, Tarrant, Denton and Collin counties remain without power, according to figures from Oncor. The lion's share of those are in Tarrant, where 10,579 can't turn on electricity. There's 1,176 affected in Dallas and 2,846 in Collin. Denton largely avoided outages just 19 there are impacted.

4:45a I drove to D/FW Airport from Fort Worth and there were no problems on the roads, which were just wet. American Airlines has reported 98 departures have been delayed out of D/FW. American Eagle has reported 192, which includes both departures and arrivals. - Jim Douglas at D/FW Airport

4:44a Roadways are wet. TxDOT will continue to monitor the roads throughout the day. TxDOT will continue to check overpasses and bridges for ice. - TxDOT Fort Worth

4:40a Oncor has reported more than 17,000 outages. A majority of that number is in Tarrant County with 10,434 outages reported. Oncor reported 2,435 outages in Collin County - WFAA.com

4:00aIt will be mainly rain around the DFW area through the morning commute. But temperatures will hover close to freezing and therefore freezing rain and sleet will mix in with the rain in some areas. Most roads will simply be wet but icy spots are possible especially on bridges and overpasses. - Meteorologist Ashton Altieri

10:22p One degree makes all the difference in the world; now it looks more like rain than anything else overnight because we're going to be one degree warmer. - Chief Meteorologist Pete Delkus

8:01p The National Weather Service has downgraded the Winter Storm Warning to a Winter Storm Advisory, effective until noon Monday. Sleet and ice accumulations will create hazardous travel conditions along streets and highways, especially on bridges and overpasses. Ice accumulation is expected to be less than a quarter-inch. - National Weather Service

6:56p More than 300 flights were canceled Sunday at Dallas-Fort Worth International Airport, representing about one-third of the scheduled departures. A spokeswoman said deicing equipment had been prepared as officials planned for the worst in a flurry of conference calls and meetings. 'It's certainly going to be a travel impact as we see the first few people making their way for Thanksgiving,' National Weather Service meteorologist Tom Bradshaw said. - Associated Press

6:37p DART urges commuters to allow extra time Monday morning to get to your stop or station. Streets, parking lots and station platforms may be slick. - DART

5:53p The City of Dallas says it is reducing its 'Ice Force Level 1' sanding operation as of 6 p.m., cutting the number of sanding trucks from 30 to 14. Street services continues to monitor bridges, overpasses, inclines and intersections and will resume higher-level operations if conditions warrant through the night. - City of Dallas

5:31p It looks like the Monday morning commute could be tough in some areas; it all depends on the temperature. We won't have much in terms of precipitation on Sunday evening. At midnight, the precipitation should start to pick up. It all depends on what the temperature is it could be rain, sleet or freezing rain. Bridges and overpasses may have very slick spots during the morning commute. - Meteorologist Ashton Altieri

5:27p A Winter Storm Warning remains in effect for most of North Texas through noon Monday. Areas of rain, freezing rain and sleet will re-develop across much of North Texas by late evening, and persist through daybreak on Monday. With temperatures hovering at, or slightly below freezing through daybreak, some accumulations of sleet and/or freezing rain will occur. This will cause problems on any bridges, overpasses, or any other elevated/exposed surfaces. Some improvement in conditions can be expected later Monday morning, as temperatures rise into the lower and middle 30s. - National Weather Service

5:24p Fort Worth police have worked 40 accidents since 10:30 a.m. Sunday. - WFAA

5:05p Here are the 5 p.m. temperatures around the region: Dallas 36; Fort Worth not available; DFWAirport 35; Mineral Wells 32; Denton 32; McKinney 33; Waxahachie 34. - National Weather Service

4:23p DART says it is watching the weather and making preparations with additional staff and supplies being deployed. - DART

4:04p Temperatures around the region at 4 p.m.: Dallas 36; Fort Worth 33; DFWAirport 35; Mineral Wells 32; Denton 32; McKinney 33; Cleburne 34; Waxahahachie 34. - National Weather Service

3:05p Latest radar scans show light rain, sleet, and freezing rain moving east of the D-FW area, where most of it will fall as rain. But light precipitation is still showing up in a few places, especially in northern Collin County. We now expect a lull in the activity through this evening. Then freezing rain and sleet will return after midnight tonight. - Meteorologist Ashton Altieri

3p The departure board at LaGuardia Airport in New York shows three DFW-bound flights canceled due to the winter weather threat. - Jason Whitely at LaGuardia Airport

2:58p The Texas Department of Transportation reports weather-related road closures in the El Paso and Odessa districts. Travel is hazardous and not advised in Amarillo, Abilene, Lubbock and Wichita Falls. - TxDOT

1:28p Temperatures at 1 p.m. Sunday:Dallas 36; Fort Worth 32; DFWAirport 33; Mineral Wel;ls 31; Denton 32; McKinney 34; Cleburne 34; Waxahachie 33. - National Weather Service

1:20p I have received a lot of questions about the difference between sleet and freezing rain. Sleet is an ice pellet that bounces when it hits the ground. It usually does not cause much problems unless it comes down heavily or in combination with freezing rain.

Freezing rain, on the other hand, is a totally different phenomenon. Freezing rain is ordinary raindrops that don't freeze until they actually hit something, and then they freeze on impact. This leaves a glaze of ice on objects and is much worse. Since most of our precipitation today should be sleet, that makes for better driving conditions.

But again, you never know when you might get that brief changeover to freezing rain, so be cautious on elevated surfaces like the bridges and overpasses. - Chief Meteorologist Pete Delkus

12:51p Lots of reports of rain mixed with sleet across the entire area. Only impacts so far are slick spots on elevated surfaces. - National Weather Service

12:49p In anticipation of winter precipitation, airlines at Dallas-Fort Worth International Airport have pre-canceled about 300 departures to reduce the number of stranded travelers. DFW Operations crews are monitoring the airfield and roads around the airport and will be treating them as needed. Please drive with caution. - DFW Airport

12:39p Temperatures at noon Sunday:DFWAirport 34; Dallas 36; Fort Worth 31; Mineral Wells 31; Denton 31; Gainesville 30; Bowie 30; Sherman 35; McKinney 34; Cleburne 34; Waxahachie 35. - National Weather Service

12:21p Dallas prepared for the onset of ice by declaring 'Ice Force Level 1,' code for sending 30 sanding trucks to trouble shoot hazardous road conditions. Officials at Dallas-Fort Worth International Airport held a flurry of conference calls and meetings to prepare for the first wintry blast. Some flights are expected to be canceled, airport spokeswoman Cynthia Vega said. - Associated Press

12:10p The latest radar images show mixed precipitation falling over much of North Texas, including snow, sleet, freezing rain and rain. - WFAA

11:50a Many areas are already at or below freezing to the west of Fort Worth; that's where the mixed precipitation is falling. - WFAA

11:10a We're seeing some slick roads to the north and west of Dallas-Fort Worth where the mixed precipitation has started falling. - WFAA

EARLIER UPDATES

Our first round of wintry mix is headed this way. Most of this is rain and sleet with pockets of freezing rain. Even a few snowflakes could occur.

A Winter Storm Warning issued by the National Weather Service begins at noon Sunday and continues for the next 24 hours. Travel could be severely impacted by icy roads, particularly during the Monday morning rush hour.

Temperatures were above freezing in Dallas-Fort Worth on Sunday morning, but may drop to freezing as soon as the precipitation begins. And then the temperatures should go back above freezing this afternoon with a continuation of rain and sleet and even some wet snowflakes.

The bulk of this mostly light precipitation for North Texas will occur from 10:30 a.m. through 5 p.m.

The second wave of precipitation will arrive after 9 p.m. Sunday, becoming moderate to locally heavy after midnight. This wave will be more significant in terms of amounts especially for the southeast half of North Texas.

And we will address the potential for ice accumulations with this second round in our afternoon discussion. And yes, I realize the maps I posted last night are downplaying this entire event, but please remember that a miscalculation in the temperature by 1-degree on my part is enough to cause this event to be more significant than what I posted. - Chief Meteorologist Pete Delkus

Stay with Channel 8 and WFAA.com through the weekend for updates.

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