By CBS3 Staff

TRENTON, N.J. (CBS) — New Jersey is under a state of emergency in response to a Nor’easter that’s forecasted to impact the state and region, Gov. Phil Murphy said. The state of emergency went into effect at 7 p.m. Sunday and will affect all 21 counties in the state.

The state of emergency will be in effect until the storm passes, Murphy said.

READ MORE: Philadelphia Students To Remain Virtual As Mediation Process Between School District, Teachers' Union On Phased Reopening Nearing End

“Heavy snow, coastal flooding, and high winds are expected in many parts of the state,” Murphy said. “The safety of residents and workers is our utmost priority. Please follow all weather-related guidance and stay off the roads in order to allow access for emergency personnel.”

The heaviest snowfall to hit New Jersey is expected on Monday with poor conditions lingering through Tuesday morning. Murphy said all New Jersey offices will be closed on Monday.

Murphy said the order doesn’t include weather-essential employees and recommended private businesses to use their best judgments for their own employees.

READ MORE: Delaware County Company Develops 'The Hurricane,' Device Using UVC Technology To Kill Coronavirus

The six COVID-19 vaccination mega-sites in New Jersey will be closed Monday, Murphy said. Any individual with an appointment at the Atlantic, Middlesex, or Morris vaccination mega-site will be contacted to reschedule their appointments, according to Murphy. The Bergen, Burlington, and Gloucester Counties mega-sits were already scheduled to be closed on Monday.

Murphy said the Vaccination Call Center will remain open throughout the storm. Its phone number is 855-568-0545.

NJ Transit will suspend services except for the Atlantic City Rail Line systemwide on Monday in preparations for the storm. The Atlantic City Rail Line will operate on its regular schedule but that could change depending on the storm, officials said.

“The New Jersey Department of Transportation is coordinating with our regional and local transportation partners and the New Jersey State Police to ensure the most effective response to this storm,” Department of Transportation Commissioner Diane Gutierrez-Scaccetti said. “We are grateful for the public’s assistance by staying at home and allowing transportation agencies to safely and efficiently clear roadways of snow and ice.”

MORE ON CBSPHILLY.COM

Philadelphia Acting Deputy Health Commissioner Dr. Caroline Johnson Resigns Amid Philly Fighting COVID Controversy

Chosen 300 Ministries In Overdrive To Help Homeless As Winter Storm Barrels Toward Philadelphia Region

MORE NEWS: Fourth Bucks County Resident, Raechel Genco, Arrested For Alleged Role In Capitol Riot

Playland’s Castaway Cove Damaged After 4-Alarm Blaze Erupts On Ocean City Boardwalk