x
Breaking News
More () »

How can hail get to be baseball-sized? | Explainer

Many viewers in South Texas shared photos and video of hailstones, some that were pretty big!

Many people in Texas, ranging from South to Central, were in for a weather surprise when large hailstones, some the size of baseballs, fell during severe weather this week.                          

But when's the last time you experienced large hail? How does it get that large? First, we must understand what hail is and how it forms.

What is hail?

Hailstones, or hail, is a frozen form of precipitation that happen inside of thunderstorm updrafts, according to NOAA National Severe Storms Laboratory

In other words, hail forms when thunderstorms carry raindrops upward into parts of our atmosphere where it's extremely cold, causing the raindrops to freeze into hailstones, according to the National Weather Service (NWS).

Hailstones then grow when liquid water drops collide into it during the updraft then freeze onto the hailstone's surface, NOAA said.

It comes crashing into the ground when the hailstone becomes too heavy or when the updraft weakens, NOAA continued.

Just how big can hail get?     

Read more: Storms exit San Antonio after bringing hail, lightning to area

Fun fact: Per NWS, the largest-sized hailstone recorded in the United States measured about 8 inches in diameter, or 18.625 inches in circumference, and weighed around 1.9 lbs.! This hailstone fell on July 23, 2010 in Vivian, South Dakota.

Credit: NWS
In July 2010, the largest hailstone recorded in the U.S. fell in Vivian, South Dakota and measured about 8 inches in diameter and weighed nearly 2 pounds.

Common sizes of hail                             

  • Pea = 1/4 inch diameter
  • Mothball = 1/2 inch diameter
  • Penny = 3/4 inch diameter
  • Nickel = 7/8 inch
  • Quarter = 1 inch — hail quarter size or larger is considered severe
  • Ping-Pong Ball = 1 1/2 inch
  • Golf Ball = 1 3/4 inches
  • Tennis Ball = 2 1/2 inches
  • Baseball = 2 3/4 inches
  • Tea cup = 3 inches
  • Softball = 4 inches
  • Grapefruit = 4 1/2 inches

What should you do when it hails?             

Hail can create a lot of damage, depending on the size of the stone. Hailstones could damage homes or cars, and can even be deadly.      

Remember to be weather aware if the KENS 5 weather team tells you there may be hail with severe storms. Be sure to also make sure you are protecting your people, pets and property by making sure everyone is inside and that your vehicles are parked under coverings.

Before You Leave, Check This Out