Heat dome

From Glossary of Meteorology
Revision as of 05:10, 5 October 2021 by Rbrandt (talk | contribs) (Created page with "== heat dome == <div class="definition"><div class="short_definition">An exceptionally hot air mass that develops when high pressure aloft prevents warm air...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

heat dome

An exceptionally hot air mass that develops when high pressure aloft prevents warm air below from rising, thus trapping the warm air as if it were in a dome. The subsidence associated with the high pressure also causes further warming by compression. Heat domes are often associated with calm upper-level flow directly overhead and/or with blocking patterns. The term has been popularized by the news media as a way to explain extreme heat and/or drought events across large regions.

Figure source: NOAA


National Ocean and Atmospheric Administration, 2021: What is a heat dome? Accessed 5 October 2021 https://oceanservice.noaa.gov/facts/heat-dome.html.


Term edited 10 September 2018.


Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.