Threats / Severe Thunderstorm or Derecho

Severe Thunderstorm or Derecho

Straight-line winds that mimic a tornado. The same shelter habits, plus a plan for the outage that follows.

ScopeLocalCauseNaturalDriven byLocationImpactModerateLikelihoodPossible

Why it matters

What Severe Thunderstorm or Derecho would mean for you

Three numbers decide how important Severe Thunderstorm or Derecho is to your preparedness planning. Impact and Likelihood are general baselines. Vulnerability depends on how prepared you are for this threat.

ImpactModerate5/9

NegligibleCatastrophic

Straight-line winds can match a tornado and bring down trees and power for days - destructive, occasionally deadly, but usually survivable indoors, so the Impact is moderate.

LikelihoodPossible6/9

RareFrequent

Severe storms roll across most of the country every season, but a genuinely damaging one - a derecho or a destructive squall line - reaches a given household less often, which lands the Likelihood solidly mid-scale.

VulnerabilityNot rated

NegligibleCatastrophic

This number is yours. It measures how hard Severe Thunderstorm or Derecho would actually hit your household given what you already have in place. Rate it in Threat Planning — then all three multiply into your personal threat rating.

Rate it in Threat Planning →

General baselines — How we rate threats →

Be ready