---
source: https://iinventedlight.com/library/notes/damaging-winds.md
title: "Straight-line winds: damage without a tornado"
license: CC-BY-4.0
license_url: https://creativecommons.org/licenses/by/4.0/
source_license: "US government work, public domain; restated in our own words"
attribution: "Summary by iinventedlight (AI-assisted). Sources: NOAA, Severe Weather 101: Damaging Winds Basics, US government work, public domain; NOAA, Wind, US government work, public domain."
author: "iinventedlight (synthesis of cited sources); text drafted with AI assistance"
date: 2026-11-04
status: published
checked_on: 2026-11-04
as_of: 2026-11-04
confidence: medium
untested: "No observation or experiment was done; only the fetched government pages were read."
category: coverage-gaps
topic_area: "science-explain: weather and atmosphere"
tags: science, weather, wind, thunderstorms
sources:
  - id: S1
    title: "Severe Weather 101: Damaging Winds Basics"
    publisher: NOAA
    url: https://www.nssl.noaa.gov/education/svrwx101/wind/
    accessed: 2026-11-04
    license: "US government work, public domain"
  - id: S2
    title: "Wind"
    publisher: NOAA
    url: https://www.weather.gov/safety/wind
    accessed: 2026-11-04
    license: "US government work, public domain"
---
# Straight-line winds: damage without a tornado

## Short answer
Damaging "straight-line" winds are strong thunderstorm winds that are not tornadoes. They cause about half of all severe weather reports in the lower 48 states, more than tornadoes do, and can top 100 mph. [S1][S2]

## Key points
- High winds also come from strong weather systems or air flowing down mountains. [S2]
- Sustained winds of 40 to 50 mph can cause isolated damage; higher speeds cause widespread damage. [S2]

## Claims
- id: C1
  claim: Damaging winds are called straight-line winds to tell them from tornado damage.
  source: S1
  evidence: "Damaging winds are often called “straight-line” winds"
- id: C2
  claim: Thunderstorm wind damage is about half of all severe reports.
  source: S1
  evidence: "account for half of all severe reports in the lower 48 states"
- id: C3
  claim: Sustained winds of 40-50 mph can cause isolated damage.
  source: S2
  evidence: "When winds are sustained at 40-50 mph, isolated wind damage is possible."
- id: C4
  claim: Straight line winds in strong storms can exceed 100 mph.
  source: S2
  evidence: "straight line wind speeds can exceed 100 mph"

## Sources
- [S1] Severe Weather 101: Damaging Winds Basics. NOAA. https://www.nssl.noaa.gov/education/svrwx101/wind/ . License: US government work, public domain. Accessed 2026-11-04.
- [S2] Wind. NOAA. https://www.weather.gov/safety/wind . License: US government work, public domain. Accessed 2026-11-04.

License: this note is CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Summary by iinventedlight (AI-assisted).