A winter advisory is a weather alert issued by meteorological services, such as the National Weather Service in the United States, to inform the public about hazardous but generally non-life-threatening winter weather conditions. Its primary purpose is to alert individuals to exercise caution as these conditions can lead to inconvenience and potential hazards. This type of advisory serves as a notice that winter weather is expected to affect daily activities.
Characteristics of a Winter Advisory
A winter advisory is typically issued for weather conditions that pose a notable inconvenience but are not severe enough to warrant a more urgent warning. These conditions often include light to moderate snow accumulation, which might range from 2 to 6 inches depending on the region’s climate and typical snowfall. Freezing drizzle or light freezing rain, which can create slick surfaces without significant ice accumulation, also commonly triggers an advisory. Such advisories indicate that travel may become difficult, but widespread disruptions or life-threatening situations are not anticipated if appropriate precautions are taken.
Comparing Advisories, Watches, and Warnings
A “winter storm watch” signifies that conditions are favorable for a significant winter storm to develop, usually within the next 12 to 48 hours. This alert emphasizes the possibility of severe weather and encourages preparation. A “winter weather advisory” means that hazardous winter conditions are imminent or already occurring, requiring caution but typically not posing an immediate threat to life.
In contrast, a “winter storm warning” is the highest level of alert, indicating that severe, life-threatening winter weather is occurring or is expected to occur very soon. This warning is issued for more substantial impacts, such as heavy snow exceeding 6 inches in 12 hours or 8 inches in 24 hours, or significant ice accumulation of a quarter-inch or more. While an advisory calls for awareness and minor adjustments, a warning necessitates immediate action and a focus on safety, often advising against travel.
Common Types of Winter Advisories
Several specific types of winter advisories are issued to address particular hazardous conditions. A Snow Advisory, or more formally a Winter Weather Advisory for Snow, is issued for light to moderate snowfalls that can make travel difficult. A Freezing Rain or Drizzle Advisory indicates the expectation of light ice accumulation on surfaces, which can lead to slippery roads and walkways. These accumulations are typically less than a quarter-inch.
A Wind Chill Advisory is issued when dangerously cold wind chills are expected, which could cause frostbite on exposed skin if precautions are not taken. These conditions, while cold, are not as severe as those that would trigger a wind chill warning. Additionally, a Dense Fog Advisory may be issued during winter months when widespread fog significantly reduces visibility, making driving particularly hazardous.
Preparing for a Winter Advisory
When a winter advisory is issued, taking practical steps can help ensure safety. It is advisable to check local weather forecasts and official alerts regularly to stay informed about changing conditions. If travel is necessary, allowing extra time for the journey is recommended, or considering delaying non-essential trips if conditions are poor.
Dressing in multiple layers of warm clothing is important if spending time outdoors. Being aware of potentially slippery surfaces, such as sidewalks and roads, helps prevent falls and accidents. Ensuring vehicles are properly prepared for winter conditions, including checking tire pressure and fluid levels, is also a sensible precaution.