A lightning channel heats the surrounding air to about five times the temperature of the Sun's surface
A lightning channel heats the air it passes through to roughly 27,000–30,000°C — about five times hotter than the Sun's visible surface (~5,500°C) — and the violent expansion of that superheated air produces thunder.
Sources
A. A lightning bolt heats the surrounding air to roughly 50,000°F (~27,760°C) — about five times hotter than the Sun's surface.
NOAA National Severe Storms Laboratory (NSSL), "Severe Weather 101: Lightning" (nssl.noaa.gov/education/svrwx101/lightning/, fetched 2026-07-27) — "Energy from a lightning channel heats the air briefly to around 50,000 degrees Fahrenheit, much hotter than the surface of the sun."
NOAA National Weather Service Safety: Lightning Temperature (weather.gov/safety/lightning-temperature, fetched 2026-07-27) — "lightning can heat the air it passes through to 50,000 degrees Fahrenheit… 5 times hotter than the surface of the sun."
BBC Science Focus (sciencefocus.com/planet-earth/why-lightning-is-so-powerful, fetched 2026-07-27) — "The charge carried by a bolt of lightning is so intense that it has a temperature of 30,000°C (54,000°F) – that's five times hotter than the surface of the Sun."
B. The Sun's visible surface (photosphere) is approximately 5,500°C (5,778 K).
Broadly cited by NASA, Britannica, Space.com. Cross-check: 27,760°C (NOAA's 50,000°F) ÷ 5,505°C = 5.04×. 30,000°C ÷ 5,505°C = 5.45×. Both support "about five times."
C. The rapid heating of the lightning channel causes violent air expansion → shockwave → thunder.
NSSL (nssl.noaa.gov) — confirms the violent expansion of superheated air is the mechanism behind thunder.
NWS Lightning Safety (weather.gov) — the rapid pressure wave from superheated, expanding air produces the acoustic event we hear as thunder.
What we refused to claim
"Hotter than the sun's core." The core (~15,000,000°C) is far hotter than lightning (~30,000°C). Script explicitly says "surface of the Sun." Never says "core."
"Hotter than the corona." The solar corona (1–3 million °C) is far hotter than lightning. Script makes no mention of the corona.
Exact figure (20,000°C vs. 30,000°C vs. 27,760°C). NASA's Global Hydrology and Climate Center cites 20,000°C (3×); NOAA/NWS says ~27,760°C (50,000°F, ~5×); BBC/CRC Handbook says 30,000°C (~5.4×). Script uses "roughly 30,000 degrees" following the BBC/CRC figure and "about five times" following NOAA/NWS. "Roughly" hedges the measurement spread.
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