VA Business Toolkit
Citizen Corps
Threats & Emergencies
Thunderstorms
Thunderstorm Basics • Responding to Thunderstorms
Thunderstorms can occur any time of day year round, but are most common in the summer afternoons and evenings. The National Weather Service considers a thunderstorm severe if it produces hail at least three-quarters of an inch in diameter, has winds of 58 miles per hour or higher or produces a tornado. All thunderstorms produce lightning, which can be deadly. Virginia averages 35 to 45 thunderstorm days per year.
