Get the latest up dates on the mobile and tablet apps. Jadiann bundle up. A bitter blast heading into new england as we get a taste of some arctic air. Wind chills adding to the frigid feel. Ryan if you think today is bad its only going to get worse. Jeremy reiner is here with how low its going to go. Reporter we have a cold front moving through. That has been setting off pockets of snow flurries and occasional snow showers. Weve one batch up through the merrimack valley, north ann. Worcester hills as well as connecticut and rhode island. Also heading southeast toward southeast massachusetts. This is cold front number one. This will set the table for a cold friday morning. Temperatures tomorrow morning will head for the single numbers. We havent been that cold since early january. The city at 24. Norwood 23. Worcester at 16. As you look up across northern new england, burlington, 12. Albany at 14. But the real deal, the real cold stuff, the arctic on this map, that is the leading edge ever the arctic front. Temperatures behind that front are dangerously cold. Moosonee at 6 below. This is heading southeast. This is going to come saturday. Especially saturday night. And sunday morning. So tomorrow its chilly day. Helps you to prepare you for the weekend with temperatures saturday morning briefly near 20 but otherwise plan on falling temperatures all day saturday and saturday night. Here you go. Saturday afternoon, at 4 00 pm temperatures in the lower teens. By 7 00 pm on saturday single numbers, approaching 0 by midnight saturday night and sunday morning i do think well be below 0. Then itll be the wind as well. This is the dangerous concern here. Wind chills between 1020 below, perhaps even 25 proon sunday morning. More about this bitter blast in a few minutes. Ryan a worker at a shelter for homeless families in lawrence facing troubling charges. Police say he hit a with his mother and brother. Steve cooper is live with the details. Reporter so the Police Report that weve obtained today outlines the disturbing details of how this 4yearold boy who is oughtistic was slapped by this worker. Police are investigating this here at police headquarters. They say he was slapped by this worker at the shelter then dragged down a hallway under a his mother is speaking out about all this. When he slapped him you could see all his fingers on my sons back. Reporter there is a picture of the welt left on tib. He had no reason to hit my son at all. Reporter his mother is speakings out after this man, 40yearold rafael prado of lawrence was charged with injuringed boy who is autistic with a severe speech impediment. Reporter when you saw the welt when i saw the welt i just lost it. Like i was screaming, i was shaking. Reporter police it happened inside carson nueva, a shelter for homeless families on jackson street. The map who works at the shelter struck the child on the back and dragged him down the hall, an incident captured on cameras inside the shelter. There is no putting this under the rug. Your staff hit my child. Once you sipe into a shelter my health and my sons safety is their responsibility. They failed us. Reporter according to the Police Report product prado said, i didnt mean to hit him so hard. Doris is the shelters director. Let them investigate and find the truth and take it from there. Reporter im going to fight for my autistic son. I hope nobody ever has to go through this as a parent. Reporter the chief told me theyre still investigating the allegations. Released on 1500 cash bail. He returns to Court Next Month but for now he doesnt work at the shelter. Were live in lawrence, steve cooper, 7 news. Jadiann were getting breaking news on ray flynn. Latest for us. Reporter the picture there is a car accident that earlier today. The former mayor was driving boston. So these are the pictures that we have. We know that e. M. S. Responded. Theyre saying flynn is not injured but they did take him to the hospital to have him checked by doctors there. Once again former boston mayor ray flynn has been involved in a car accident. Were checking his condition, staying on top of the story. For now im kim khazei. Ryan new details about a deadly fire in fitchburg. A second woman has died from her injuries. Her sister died too. The fire tore through their house. Officials believe the cause was an electrical situation. The white house heating up in milwaukee tonight. That is where the two Democratic Candidates will square off in a debate hold at the university of wisconsin. Mean while republican candidates are shifting focus to South Carolina ahead of the primary. Wendy wolf has the latest from the campaign trail. Reporter on the heels of benchy sanders landslide victory in New Hampshire, tonight is the first real showdown between the two remaining Democratic Candidates. The selfdescribed democratic socialist took a victory lap with public appearances in new york and meeting with activists and ms sentence anger reverend al sharpton. Its very important that he sent the signal that on the morning after a historic victory he would come to harlem and have break fast with me. Reporter the vermont senator is courtinged minority vote caughting his immigrant road to broaden i still love New Hampshire and i always will. [applause] reporter despite her blistering loss in the granite state, the Congressional Black CaucusPolitical Action committee chose choose to endorse sect clinton. She has been our partner long storm system. We believe she made a difference. Reporter tonights debate will be clintons first public appearance after two days of private meetings with advisors about how to reenergize lagging support with women and young people. While the wisconsin primary is still more than a month away, tonights location at the university of wisconsin, milwaukee, will help set the stage in this Battle Ground state in the general election. You can expect fireworks tonight surrounding gun control, income and equality and who is more progressive. The next caucus is in nevada february 20th. Milwaukee. Ryan five people are facing criminal charges for that killed two people and leveled three buildings. The explosion happened last march. The owners and others have been indicted. They illegally siphoned gas from a sushi restaurant at the base of the building leading to the blast. They have to resist temptation to take the short cuts. When you tinker around with a gas system, electrical hookups has happened here you have in effect weaponnized the building. That power system and you could be held as here accountable for the harm you inflect. Ryan the group faces charges ranging from second gree manslaughter to criminally negligent homicide. Jadiann turning to a developing story out of mexico where 52 inmates have been killed killed killed in a prison riot. A fight escalated into the riot. Pressers in set fire to the prison wearhouse. Some prisoners may have escaped but Authorities Say the situation is now under control. Oregon is finally over. The last protester surrendered to police this afternoon. Four people were taken away from a National Wild live refuge and by the f. B. I. Mine mooar on how agents convinced them to sur render. Reporter after 41 days the last of four armed protestors holed up in a federal wild live refuge in oregon surrendered to authority but not before a defiant last stand. Come out with your hands up . No, were not. Reporter the f. B. I. Surrounded the proest iters overnight leading to hours of tense negotiations. Live streamed over the internet. The reverend Franklin Graham and another convinced occupiers to give up. We need you to stay calm here because we have to our, im listening to you. Reporter the occupation, part of a long running dispute over public use of federal lands was he was arrested last month and his father locked up today by federal agents. If you are doing civil disobedience you have to be able to stick your neck out. And deal with the consequences. Think about the black lives matters protestors. Reporter one of the oregon protesters was killed last month in a showdown with police. The groups supporters stood vigil as negotiators barge yipped with the last hold out. It wont take very much prove vacation for something to go bad. Reporter the last of the protestors gave up but made it clear their surrender is not the end of the fight. Brian mooar, nbc news. Jadiann the family of a 12yearold boy shot and killed by police in cleveland could be heading to court. The city of cleveland is asking tamir rices family to pay a 500 ambulance bill. Officers shot rice in 2014 after they say he was helding a toy gun that being looked like a real gun. City filed a claim wednesday looking to be reimbursed for decided not to indict the officers involved. Ryan also a Senate Committee is working out ways to find funding to help fight the spread of the zika virus. The director of the cdc and the direct are of the n. I. H. Were there to testify. The most important issue is to develop a vehicleons but theyre learning more about it every day. Zika is now. New diseases can be scary particularly when they affect the most vulnerable among us. The most important thing for americans to know if you are pregnant its better not to travel to a place where zika is spreading and if you are pregnant in a place where its spreading do everything you can to protect yourself against mosquito bites. Jadiann drawing drama on dog drama on the highway. The highway then shutting it down. Ryan Police Warning off an online threat. Someone is preying on middle school students. Jadiann striking a deal the payout families of the victims in the Whitey Bulger could soon receive from the federal government but it comes with a catch. Ryan the driver of a car that plowed into a man in woburn and kept on going has been arrested. Police expected to hold a News Conference this afternoon with the details of his arrest. Well bring it to you live. Kris we are at Acton BoxboroJunior High School for this weeks class act telling you about a local student who has been trying to brighten the lives of local veterans. Jadiann there were dog drama on a major highway in met especially. Lexy wandering in the middle she trotted around from lane to lane. Ryan until police shut down the road to keep her safe. Kimberly bookman reports with what the owners are saying about her great escape barking . Reporter its as if the German Shepherd is trying to explain how she ended up in the middle of 495. A sargent snapped this picture of the dog walking in and out of three lanes of traffic. You dont see that at all. A lot of motorists could have ed on the breaks because reporter he was one of several officers that slowed cars to 20 miles an hour as a trooper used a gran aleo bar. He was silly and sat. Reporter her grandparents own the dog named lexy. They let her out wednesday and didnt know she was gone until they got a phone call from animal control. She said im in your driveway. So i hung up and went out and there was the dog in the car. Reporter lexi has gone a tag and a chip. Her owners retraced her paw brings in the snow. But if it wasnt for this picture they wouldnt believe she managed to get a highway. Reporter pounding in my stomach. I looked at it and i said oh, yes, its her. Reporter kimberly bookman, 7 news. For the weekend. Perhaps a threedog night. Jadiann the unique wayed mayor is getting people to throw away the gart butts. Ryan two people reunited after they were separated by a war. Now theyre getting back together just in time for justice department. Jadiann were following breaking news. The driver of a car that plow nod a man and kept on going has been arrested. Police expect to hold a News Conference this afternoon with the details of the arrest. Well bring it to you live right here on 7 news. Stay with us. baseball on tv in background with Heart Failure, danger is symptoms worsen because your heart isnt pumping well. water filling room about 50 percent of people die dog whimpering within 5 years of getting diagnosed. But theres something you can do. Talk to your doctor about Heart Failure treatment options. Because the more you know, the more likely you are. V dog whimpering right, weve had a mild february so far. Things are about to change. Jadiann theyre going to change in a big way. Jeer re is talking about how cold its going to be with the wind chill. Ryan you are going to feel that saturday night, sunday morning. Jennifer it will be really cold air coming in on saturday. Bitterly Cold Saturday evening through sunday morning, even tomorrow morning its cold. Sneaky cold for you because we have not had a cold february. The end of january was very warm. So dont get caught offguard by that but as quicklies a the cold comes in its right back out next week. So that our next real storm threat looks like its a rainstorm on tuesday. Jet stream this week not allowing the bitterly cold air to come into the northeast all at once. There has been seeping into new england with each passing day. Again tomorrow will be a little colder than today but we release the hounds for saturday and sunday as a bitterly cold chunk of air flows right out of canada. Churchill 26 below. Moosonee at 6 below zero, here in the city 24 above. You aint seen nothing yet. There is it a cold front moving through. There has been popping off isolated snow showers and snow flurries, here is the arctic express. That comes barreling into some leftover snow flurries and snow showers. One batch up to north shore fizzling as we step over the next couple of hours and another batch out to the woonsocket. Heading for the south shore. Much ado about nothing, temperatures lower 20s. Worcester at 16. We had the big air event at fenway park. No bitterly cold air. Chilly but its wind. There is snow. So few flurries out there but dry tomorrow. Tonight clearing. Colt tonight with lows for many of you tomorrow morning down in the single numbers, boston around 11. Norwood at 4. Worcester at 5. Jaffrey at 3. Mornings hard to come by. You have to go back to january 5 before you find a morning that will have tomorrow morning january 5th boston had a low of 8. Tomorrow around 11. Then come a cold day. Wind chills in the deeps tomorrow. The actual air temperatures boston 28 tomorrow afternoon. Worcester hills also rolling through the middle 20s fitchburg at 24. More clouds in the afternoon for the worcester hills and chatham at 27. Go. Saturday briefly near 206789 dont let that catch you offguard because temperatures will fall quickly during the day on saturday. As the arctic front comes ripping through southern new england. There might be a couple of isolated snow showers front. But really its about the serious Cold Saturday night and sunday morning. Here are the temperatures. Sliding downhill fast. Then you notice the wind chills also going down to dangerous lows. By midnight saturday night the wind chill is near 20 pro valentines day mostly sunny sky, temperatures start pro0679 even in boston around 3 below which will tie the record. Just a oneday thing. By the afternoon you are 30 and look at tuesday, flirting with 50. See you at 4 30. Ryan thank you, get a check of the drive home. Here is Joe Stapleton with an update. Reporter getting a expressway commute. This is the right travel lane being blocked by a couple of cars involved in a crash. Pushing traffic back on the ramp certainly. Taking a look at route 93. That is where all the red is. Jammed up down around the braintree area then exclamation point to the bottom of the screen is a crash on 128 southbound. Down by the route 24 offramp. Heading for 128 and the mass pike a tight ride there at the top of the screen. It continues heavy as well. 495 out to metro west, not moving too badly by route 9 or heading up to route 2. Moving nicely. Downtown were not so lucky here. 93 northbound and southbound dealing with delays. 93 close to a 45minute ride now leading away from the camera heading out to route 128. Im Joe Stapleton, 7 news. Jadiann next on 7 news a ups driver under caught on camera tossing packages. What the home owner is saying. Ryan a dog rescued from a raging fire. How firefighters were able to pull the dog to safety before it was too late. Jadiann shoes crip passengers are lucky to be alive after a rough ride on the high seas requirements occupation in oregon over as the last four hold outs i do everything on the internet. But its kind of slow. My friends say i should get fios because its the fastest. I just downloaded 600 photos in 60 seconds. Thats seriously better. Were out of 2 i wonder what else could be better around here . I heard that. Switching to Better Internet is now easier than ever. Only fios has the Fastest Internet available, with uploads up to 5x faster than cable. Get 100 meg upload and download speeds plus tv and phone for just 69. 99 a month online switch to better. Switch the president s day sales event is on now at your new england ford dealers. Save big on americas bestselling trucks for 39 straight years. Now with additional president s day bonus cash. Get up to 7,050 total savings on the historymaking f150. The future of tough. And super duty, the rougher the going, the tougher the truck. Hurry in for up to 7,050 total savings. On ford fseries. Or lease f150 for just 249 a month. Just 249. At your new england ford dealers announcer this is 7 news at 4 30. Ryan breaking news here at 4 30, former boston mayor ray flynn has been involved in a car accident. Happened while he was driving near his home in south boston, here is a look at the pictures from the scene. E. M. S. Did respond. Flynn was not injured but he was taken to the hospital as a precaution. Much more ahead on 7 news at 5 00. Jadiann breaking today a suspect arrested after this hitandrun that happened in woburn. A driver slamming no a 65yearold man. You can see it all in the video. It was captured on the camera. The victim holding on to the hood of the car requirements the suspect is in custody. Kim khazei has more. Reporter the suspect was a suspect was arrested this afternoon in mattapan. Tyson delgado wanted not just for his role but for larceny. Officers were interviewing him with the larceny when he t