After a week of flirting with freezing weather, the Dallas-Fort Worth area is expected to warm enough over the weekend to keep ice from forming on roads.

Friday morning's commute may be damp, but not icy.

"We're not really worried about the weather right now," said Dan Shoemaker, a National Weather Service meteorologist in Fort Worth. "We're in the middle of a slight warming trend."

Forecasters said a shift in a weather system over Baja California nudged temperatures higher in North Texas on Thursday.

Friday's high is expected to be 42 with a slight chance of rain, though the night could bring some periods of freezing rain.

Rain is expected to begin at midday Saturday, with the possibility of light freezing rain. But the precipitation should trail off by Sunday morning, accumulating less than an inch.

The sun may peek through clouds briefly Sunday afternoon before a gray lid shuts and colder weather returns Monday.

The Texas Department of Transportation has spent about $500,000 so far on this week's winter roadwork. A large portion of that was spent on de-icer, which is in short supply, and the state doesn't expect more to arrive until Tuesday at the earliest.

At the North Texas Tollway Authority, delivery trucks replenished the agency's sand stockpiles throughout the day Thursday. The agency ordered 5,200 tons of sand after using two-thirds of its 9,000-ton stockpile during the recent ice, sleet and snow storms.

The foul weather has resulted in long hours and extra shifts for forecasters, street crews and many public employees.

"I'm tired of it," said Dale Long, a Dallas spokesman. "Over the weekend, our emergency operations center was open 24 hours. I worked two overnight 12-hour shifts, and I can't sleep during the day. I'm still trying to get caught up."

A weather-related traffic accident in Fort Worth on Thursday killed a 19-year-old woman and injured her brother.

Steven Alvarez, 16, and his sister Cassidy had gone to an icy bridge on Southwest Loop 820 on Wednesday to help their mother, who had been in a traffic accident earlier in the evening, said Fort Worth police Sgt. Rodney Bangs.

The teens were struck by a skidding Ford F-350 truck driven by Earl York, 41, of Midland.

Steven is in serious condition at John Peter Smith Hospital in Fort Worth.

A second accident killed 63-year-old Enedina Chavez of Alvarado and injured five others Wednesday night in Grand Prairie.

Juan Payan, 33, of Alvarado lost control of his 2001 Chevrolet truck while crossing an ice-covered bridge in the 6800 block of South Highway 360 over Walnut Creek, according to Grand Prairie police Sgt. Eric Hansen.

Mr. Payan is listed in critical condition at Harris Methodist Hospital in Fort Worth. Four others were treated and released from area hospitals.

Staff writers Tony Hartzel and Kimberly Durnan and Sergio Chapa of Al Día contributed to this report.

E-mail sfarwell@dallasnews.com