Standard Lemma guide

arkstorm

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

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Pronunciation

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1

noun

Meaning 1

A very severe rainstorm lasting for many days, fed by an atmospheric river, causing massive flooding.

Definition source: English Wiktionary via Wiktextract

Topics: climatology, meteorology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Alternative form of arkstorm.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From ARkStorm, from atmospheric river (“AR”) + thousand (“1000, k”) (1-in-1000 years) + storm. From starting as a disaster planning scenario for a once in a thousand year storm event rainstorm fed by a Pineapple Express atmospheric river hitting California and deluging the state, resulting in a seemingly biblical flood, requiring an ark, as the Central Valley turns into an inland sea.