Winter Storm Warning Issued for High Country: Ice and Dangerous Travel Conditions Expected

 Winter Storm Warning Issued for High Country: Ice and Dangerous Travel Conditions Expected

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A Winter Storm Warning has been issued for Ashe County, North Carolina, effective from 4 a.m. Tuesday through 4 p.m. Wednesday, bringing the threat of significant ice accumulation and hazardous travel conditions. This warning is prompted by a classic cold air damming setup, which occurs when colder air becomes trapped to the east of the Appalachian Mountains. Meanwhile, warmer, moisture-rich air overrides this cold air mass, creating a zone of mixed precipitation that includes snow, sleet, and freezing rain.

What is Cold Air Damming?

Cold air damming is a weather phenomenon that occurs when cold air becomes trapped in valleys or areas with lower elevation, particularly along the eastern side of mountain ranges like the Appalachians. The cold air is unable to escape and is forced to stay at the surface, while warmer, moisture-laden air flows over the top, creating a classic setup for winter weather. This trapped cold air influences the type of precipitation that falls, with the depth of the cold air wedge playing a crucial role in determining whether the region will experience snow, sleet, freezing rain, or just cold rain.

For the upcoming winter storm, the depth of the cold air wedge will determine how much ice and snow fall in various areas. A shallow cold air wedge typically results in precipitation freezing at or near the surface, leading to icy conditions. On the other hand, a deeper cold air wedge can lead to more snow and sleet accumulation. As the cold air traps at the surface and warmer air flows above, precipitation falls in the form of snow, sleet, or freezing rain, depending on the temperatures at various levels in the atmosphere.

What to Expect in the High Country

Ashe County and the surrounding areas in the High Country are expected to bear the brunt of this storm, experiencing a mix of snow, sleet, and freezing rain. With temperatures remaining near or below freezing for much of the event, icy conditions are likely to develop. The freezing rain is expected to accumulate on trees, power lines, and roads, creating dangerous travel conditions and a significant risk of power outages due to downed branches and power lines.

In the High Country, the cold air wedge will likely remain strong, which will prevent temperatures from rising above freezing at the surface. As a result, residents can expect icy conditions and hazardous roads. The ice accumulation is expected to be substantial enough to disrupt travel, and drivers should be prepared for slick surfaces, reduced visibility, and the potential for significant delays. Travel in these areas will be dangerous, and residents should consider postponing any non-essential trips during the storm’s peak.

Impact on the Foothills

Areas in the foothills surrounding the High Country will also experience a mix of precipitation, but the conditions will differ due to the slightly less intense cold air damming. These regions will likely see a mix of sleet and freezing rain, which could still result in slippery roads and hazardous conditions for travel. However, while ice accumulation may not be as severe as in the High Country, the icy conditions still pose a serious threat to drivers and pedestrians.

The warmer temperatures aloft may allow for more of the precipitation to fall as freezing rain rather than snow, increasing the chances of hazardous driving conditions. While these areas may experience less snow than the higher elevations, they are still at risk for significant ice accumulation that can affect roadways, power lines, and trees.

The Piedmont: Cold Rain Expected

For areas further to the southeast, particularly in the Piedmont, the temperatures will remain above freezing for much of the storm. As a result, these areas will likely see rain instead of snow or sleet. However, the rain could be heavy at times, potentially leading to localized flooding in areas with poor drainage. While the Piedmont will not experience the dangerous ice conditions that the High Country will face, the significant rainfall could still lead to slick roads and limited visibility.

Although the Piedmont will not be under the same Winter Storm Warning as the High Country, residents should still be cautious and prepared for wet, cold conditions. Flash flooding may be a concern in areas with already saturated soil, and the combination of rain and low temperatures could create hazardous travel conditions.

Safety Tips for the Storm

As with any winter weather event, safety is the top priority. Here are some tips to help you stay safe during the winter storm:

1. Avoid Travel: If possible, stay off the roads during the storm, especially in the High Country and foothills. Ice can make roads treacherous, and visibility will be reduced due to snow, sleet, or freezing rain.

2. Prepare for Power Outages: Ice accumulation on power lines and trees could cause outages. Be sure to have a flashlight, extra blankets, bottled water, and non-perishable food on hand. If you rely on medical equipment that requires power, have a backup plan.

3. Dress Warmly: If you need to go outside, bundle up in layers. Cold temperatures combined with wind and precipitation can quickly lead to hypothermia if you are not properly dressed.

4. Check on Vulnerable Neighbors: If you know of elderly or ill neighbors, check in on them before and during the storm to ensure they have the necessary supplies and support.

5. Winterize Your Vehicle: If you must drive, ensure your vehicle is winter-ready. This includes checking tire tread, keeping your gas tank full, and having a winter emergency kit with items such as blankets, gloves, and a shovel.

Conclusion

Ashe County and the surrounding High Country are in for a potentially dangerous winter storm that will bring significant ice and hazardous travel conditions. Residents should be prepared for a mix of snow, sleet, and freezing rain, and travel should be avoided if possible. While the Piedmont will experience rain, the cold, wet conditions will still pose risks for those in lower elevations. By taking precautions and staying informed, you can stay safe during this winter storm event.