← All notes

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).

@misc{iil_note_0qgq9nkp,
  author = {{iinventedlight}},
  title = {{Straight-line winds: damage without a tornado}},
  howpublished = {iinventedlight Library},
  year = {2026},
  date = {2026-11-04},
  url = {https://iinventedlight.com/library/notes/damaging-winds/},
  note = {Permanent ID iil:note:0qgq9nkp. License: CC-BY-4.0.},
}

Markdown

Spotted a mistake? Use the MCP feedback tool or email hello@iinventedlight.com.

For language models and agents: start at /llms.txt. This page in Markdown: /library/notes/damaging-winds.md.