Toll Free (866) 885-9785

Thundersnow and Its Risks

What is Thundersnow?

Thundersnow, as seen in the two videos below featuring The Weather Channel’s Jim Cantore, is exactly what it sounds like  a snowstorm that has lightning and thunder like a thunderstorm.

The Science

Also known as thunder snowstorms or winter thunderstorms, a thundersnow only happens when a rare set of conditions occur. In fact, people only witness about 6.3 thundersnow events each year. Typically between late winter and early spring when the air beneath the clouds is warmer near the ground than the air in the upper cloud layers. The cumulonimbus cloud (towering mass with a flat base at fairly low altitude and often a flat top, as in thunderstorms) must be lower than a typical thunderstorm, and the warmer air temperature must still be cold enough to form snow. Thunder snowstorms usually create snowflakes, soft snow pellets, hail and strong “gravity wave” currents of air similar to ocean waves. The lightning produced appears in purplish-blue flashes.

A thundersnow occurs wherever lake-effect snowstorms occur or where conditions favor thunder and lightning in cold weather, such as around the Great Lakes and parts of Canada. They also sometimes happen near the Sea of Japan, Mount Everest and parts of northwestern Europe.

The Dangers

As a combination of a thunderstorm and snowstorm, a thundersnow poses twice the risk.

Snowfall muffles thunder, resulting in an echo of only two to three miles, which means that people outside the range might not realize that a snowstorm is a thundersnow. A winter thunderstorm rapidly drops snow at a rate of two to four inches per hour, limiting outdoor visibility to one-fourth of a mile or less. Poor visibility can cause car accidents and heavy snow to pile up on rooftops. A thundersnow’s strong tropical storm force level winds can also cause property damage, extremely low wind chills, and frostbite.

Lightning produced during winter thunderstorms can strike the ground as well as people and buildings. Recently, Weatherbug reported that a March 1996 thundersnow in Minneapolis caused a man to be struck by lightning. Four Maine teens in February 2002 were injured when lightning struck a hill they were on. On January 14, 2015, The Daily Mail reported that thundersnow lightning struck a house in Cornwall so hard that it blasted a hole into the side of the building.

To learn more about general thunderstorms and lightning, check out our post on Lightning Safety Tips and Myths.

Help be more prepared for disasters by learning about ALE’s disaster response solutions.

Photo credit: ©iStock.com/IakkovKalinin

 

Tags

Leave a Reply

Your email address will not be published.

  • MyALE

    Claims Portal

    • Personalize a dashboard
    • Manage in real-time
    • Access on all devices
    • Request or extend temporary housing with one click

    Learn More


  • Join Our Facebook Fan Page Check Us Out On Instagram Follow Us On Google+ Follow Us On LinkedIn Follow Us On Twitter View Our YouTube

  • Weather Safety



  • Instagram
    • Visit us Wednesday October 17th at the Northern Illinois University
      Visit us Wednesday, October 17th at the Northern Illinois University All-Majors Internship and Job Fair! Explore our open positions today! https://www.alesolutions.com/careers
    • ALECares was honored to work with tebowfoundation to help make
      ‪ #ALECares  was honored to work with ‪ @tebowfoundation  to help make 16-year old Joey’s ‪ #W15H  come true over the weekend!! Read Joey’s Full W15H Experience: https://www.timtebowfoundation.org/stories/joeys-w15h-tim-tebow
    • ALECares is blessed to be part of 9year old Matthans
      ALECares is blessed to be part of 9-year old Matthan’s W15H experience supporting the Tim Tebow Foundation! Read Matthan’s Full W15H Experience! https://www.timtebowfoundation.org/stories/matthans-w15h-tim-tebow
    • Meet the newest member of the tebowfoundation W15H family Mariel!
      Meet the newest member of the  @tebowfoundation  W15H family, Mariel!  #ALECares  was blessed to help make Mariel’s  #W15H  come true! Read Mariel’s Full W15H Experience:
    • Veterans and active duty members we salute you THANK YOU
      Veterans and active duty members, we salute you. THANK YOU for serving our country and protecting our freedom!  #VeteransDay 
    • Read our Halloween Home Security tips to keep your home
      Read our Halloween Home Security tips to keep your home, family and visitors safe during the spooktacular holiday! https://ale.solutions/HalloweenSecurity
    • So BLESSED that we can be part of making Levis
      So BLESSED that we can be part of making Levi’s  #W15H  weekend supporting the Tim Tebow Foundation! Thank you Julie DuJardin for coordinating this special
    • THANKFUL  BLESSED to be SERVING FAMILIES
      THANKFUL & BLESSED to be SERVING FAMILIES.
    • Pray for California!
      Pray for California!
    • Prayers to all at Panama City  Mexico Beach Florida
      Prayers to all at Panama City & Mexico Beach, Florida.  #HurricaneMichael 
Get fresh, free content delivered monthly »
About Us  |  Contact Us  |  Legal / Privacy  |  Sitemap
PLRB