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Snow Storm

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Road Conditions Longmont

During a snow/ice event, find City of Longmont road condition updates, Monday – Friday, on the Winter Weather Road Report webpage. If conditions are severe, the City's Emergency Alert webpage will be launched as the single-point communication hub for all storm related news and updates, including facility closures.

Find general information including snow routes and operational plans on the Snow & Ice Control webpages.


Winter Storm Watch


Normally, when a winter storm is expected, the National Weather Service will issue a Winter Storm WATCH 12- to 36-hours in advance. A winter storm WATCH means that conditions exist for the possible occurrence of severe winter weather such as blizzard conditions, heavy snow, significant freezing rain, or heavy sleet.

A Winter Storm WATCH is your signal to prepare for the storm now. Once the storm begins, travel may be too dangerous or impossible.


Winter Storm Warning

Normally, when a winter storm is imminent, the National Weather Service will issue a Winter Storm WARNING or Blizzard WARNING 6- to 24-hours before the storm strikes. A winter storm WARNING means that severe winter weather such as heavy snow, significant freezing rain, or heavy sleet is expected. A Blizzard WARNING means that sustained or gusty winds of 35 mph or more and considerable falling and/or blowing snow reduces visibility to less than one-quarter of a mile for three or more hours.

The issuance of the Winter Storm Warning is your signal to take steps necessary to keep you, your family and pets/animals safe during the storm.

Preparing at home (and at work):

  • Remaining inside protected from the elements is the safest place during a winter storm. The primary concern of being indoors is the potential loss of heat, power, telephone service, and a shortage of supplies if the storm persists for more than a day.
  • Flashlight with extra batteries
  • Battery powered weather radio and portable radio tuned to 1360 AM
  • Extra food and water especially high energy food that requires no cooking or refrigeration such as dried fruit and canned goods
  • Medicine, first aid supplies, and ample baby supplies
  • Emergency heating source, such as a stocked fireplace, wood stove, or space heater
  • Smoke detector and fire extinguisher, the chance of fire increases dramatically using alternative heating
  • Carbon Monoxide detector

Don't forget, you may not be at home when the storm strikes! Have emergency supplies available at your place of work as well.

Preparing your vehicle:

About 70% of deaths during an ice or snow storm occur in a vehicle! If you wonder if you should attempt to travel, then don't ! If you must travel then allow extra time. Reduce your speed and do not attempt to travel to make sudden turns or stops. Winterize the vehicle so it will be reliable. This includes a good set of tires. Other items necessary for the car or truck include:

  • Dry blanket(s) or sleeping bag
  • Extra dry clothing
  • Flashlight with extra batteries
  • High calorie non-perishable food (granola bars and powerbars)
  • Snow shovel, windshield scraper, and brush
  • Sack of sand, rock salt, or kitty litter for traction
  • Booster cables
  • First aid kit and a small container for water
  • Maps, compass, knife, and water proof matches

All unnecessary travel should be delayed until the storm is over. Seventy percent of all deaths during snow and ice storms occur in vehicles! If you get stranded in your vehicle and shelter is not visible nearby then stay with your vehicle.

  • Run the motor for about ten minutes each hour for heat. Keep the tailpipe free form snow and open the window slightly from time to time to let in fresh air (REMEMBER CARBON MONOXIDE)
  • Make yourself visible by turning on the dome light while the engine is running
  • Exercise occasionally by vigorously moving arms, legs, fingers and toes to keep your blood circulating.
  • Eat and drink regularly to keep your body temperature up and prevent dehydration.
  • Provide for pets by making sure they have shelter and plenty of food and fresh water available.

Most deaths and injuries during winter storms can be prevented! Overexertion in the cold kills many people. The heart and blood vessels constrict in cold conditions to preserve body heat. Too much exertion can cause a heart attack.

When shoveling snow or doing other activities in the cold you should always set a slow pace. Take frequent breaks and warm yourself regularly.

Sweating can lead to hypothermia (low body temperature). The signs of hypothermia include uncontrollable shivering, disorientation, slurred speech, and drowsiness or exhaustion. If the body temperature has dropped below 95F seek immediate medical help.

Frostbite can also occur from exposure to the cold. Frostbite causes a loss of feeling and usually occurs in extremities such as toes or fingers first.

When treating hypothermia or frostbite always make sure the affected area is dry and then warm it slowly using blankets! A person suffering from hypothermia must have their chest, neck and head warmed first.

When spending time outdoors in the cold...wear several layers of loose-fitting, light weight, warm clothing. Remove layers of clothing to avoid perspiration, and subsequent chill.

For more information about emergency preparedness in Longmont, please call the City of Longmont, Office of Emergency Management at (303) 651-8438 or contact us by email.


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