Southeast Louisiana is bracing for an unusual weather event as very cold arctic air combines with a storm system in the Gulf, creating the potential for snow and wintry precipitation early next week. The National Weather Service has issued a Winter Storm Watch for late Monday through Tuesday, with temperatures expected to plummet and a rare opportunity for snowfall in the region.
The Arctic Invasion
A portion of the Polar Vortex, a system of frigid air usually confined to the Arctic, is set to dip southward into the Central U.S., bringing a blast of icy temperatures across much of the country, including Louisiana. By Monday morning, temperatures in Southeast Louisiana will fall into the 20s, with strong northerly winds making it feel even colder. A Cold Weather Advisory has already been issued, and Extreme Cold Warnings may follow.
Chilly Forecast
Sunday’s temperatures in the 40s were just the beginning. Monday through Wednesday, the region will endure this cold snap, with wind chills making outdoor activities especially uncomfortable. Residents are advised to bundle up, protect exposed skin, and take precautions to prevent pipes from freezing.
Snow Potential
The Gulf Coast rarely sees snow, but this system could change that. Forecasters predict that wintry weather will arrive on Tuesday, beginning as a mix of precipitation on the South Shore and transitioning to snow in the afternoon. Meanwhile, the North Shore is expected to receive heavier snowfall throughout the day. Depending on the exact track of the storm and atmospheric conditions, much of Southeast Louisiana could experience measurable snowfall.
Different weather models offer varying scenarios:
- The GFS (Global Forecast System) suggests a heavier focus on the North Shore, with mixed precipitation dominating the South Shore earlier in the day.
- The ECMWF (European Model) predicts snow for the entire region, including the South Shore and River Parishes, during Tuesday’s daylight hours.
Precipitation Types
The type of precipitation will depend on the temperatures in different atmospheric layers:
- Freezing Rain occurs when snow melts into rain but refreezes upon contact with cold surfaces, creating dangerous icy conditions.
- Sleet forms when melted snow partially refreezes into ice pellets before hitting the ground.
- Snow falls directly when all atmospheric layers remain below freezing.
Preparation is Key
This rare event could bring beauty but also hazards. Roads may become icy, and power outages are possible due to ice accumulation on trees and power lines. Ensure you have emergency supplies, stay off roads if conditions worsen, and protect pets and plants from the cold.
Stay tuned to local forecasts for updates, and follow the advice of authorities to stay safe during this extraordinary weather event.