天気の予報は過去のデータに基づいて行われる。

Sentence Analyzer

天気の予報は過去のでーたに基づいて行われる。

English Translation

The weather is forecast, using the past data as a basis.

Furigana

天気(てんき)の予報(よほう)は過去(かこ)のデータに基(もと)づいて行(おこな)われる。

Romanji

Tenki no yohō wa kako no de-ta ni motozuite okonawareru.

Words

天気 (てんき)

weather; the elements; fair weather; fine weather

の (の)

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

予報 (よほう)

forecast; prediction

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

過去 (かこ)

the past; bygone days; the previous; a past (i.e. a personal history one would prefer remained secret); one's past; past (tense); preterit; preterite; previous life

データ (データ、データー)

data; datum

に (に)

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

基づく (もとづく)

to be grounded on; to be based on; to be due to; to originate from

行う (おこなう)

to perform; to do; to conduct oneself; to carry out