Looking at similar past winters helps explain the historical odds behind El Niño Track city and region pages; it does not mean the current season will match any single year. Every El Niño is different: storm-track latitude, event strength, and other climate patterns all matter. Below are well-documented historical episodes with links to NOAA CPC and climate.gov; composites show tendencies, not guarantees.
We never claim the current winter equals a past year.
Forbidden: “This winter = 1997–98,” “replay of 1982–83,” or “guaranteed California floods like [year].” Allowed: “In past strong El Niño winters, composites often showed…” / “Similar past winters are useful context, not a copy-paste forecast.”
From Mike Halpert / climate.gov United States El Niño Impacts (CPC), using peak seasonal ONI:
Live homepage phase/strength uses CPC’s seasonal RONI product. Historical analog strength classes on this page follow Halpert’s published ONI-based definitions and CPC historical episode tables; do not silently mix indexes in one sentence. Source: Halpert U.S. El Niño impacts
Tables: CPC ONI episodes · CPC RONI episodes · composites hub · every El Niño winter precip since 1950 · El Niño & U.S. winter weather
Strength class = strong per Halpert (≥1.5°C peak ONI). Years are Northern Hemisphere winter-centered.
Among the strongest in the modern record; Halpert highlights with 1997–98. Often cited for much-above-median winter precip across California; Gulf Coast / southern tier wet signal consistent with strong-event maps.
A textbook strong analog year for southern U.S. / California storminess in composites, still not a template for “this winter.”
Sources: Halpert · every-El-Niño maps · nawinter
Halpert: one of the two strongest of the prior ~60 years alongside 1982–83. Strong-event maps / Halpert narrative: much-above-median winter precip across California; Gulf Coast wet among the most consistent U.S. signals.
Famous strong episode often used in public memory; use for education, never “current winter = 1997.”
Sources: Halpert · every-El-Niño maps
Belongs with other strong winters in every-El-Niño precip map rankings; southern-tier wet / northern milder patterns still event-dependent; 2015–16 did not clone 1997–98 locally everywhere.
Recent strong analog: proves even strong events diverge regionally. Composites are odds, not copies.
Sources: every-El-Niño maps · climate.gov beyond data · CPC ONI table
Named in Halpert strong-episode California discussion. Halpert: median or above-median winter precip over all of California in this strong episode; Gulf Coast wet pattern belongs to the strong-event consistency story.
Sources: Halpert · every-El-Niño precip maps
Halpert strong list. Halpert: median or above-median precip statewide in California for this strong episode; southern U.S. wet tilt in strong-event collections.
Sources: Halpert · every-El-Niño precip maps
Halpert contrast case: only small surpluses in southern California despite strong classification; teaches that strong ≠ automatic statewide CA soak.
Use as the humility analog next to 1982–83 / 1997–98.
Source: Halpert
Halpert: precip generally average to below-average across California even in this strong episode; another “strong but not a flood script” teaching year.
Source: Halpert
Halpert lists with other strong episodes; southern CA only small surpluses in his contrast set. Another strong year that did not reproduce 1997–98 California statewide soaking; Gulf Coast wet signal remains the more frequent U.S. story across strong maps.
Sources: Halpert · every-El-Niño precip maps
Class: Moderate per Halpert (peak ONI 1.0–1.4°C). Halpert notes CA/Southwest precip for weak/moderate events is roughly mixed. Prefer these as “strength matters” teaching years, not as forecasts. See CPC historical table for peak season value rather than invented °C peaks.
Moderate-class map member. Appears in post-1950 El Niño winter precip map collections ranked below strong events; use to show mixed Southwest/CA outcomes vs strong years.
Sources: every-El-Niño precip maps · CPC ONI table
Moderate-class map member. Same: odds education, not a clone year.
Sources: every-El-Niño precip maps · CPC ONI table
Moderate-class map member. Same: odds education, not a clone year.
Sources: every-El-Niño precip maps · CPC ONI table
Weak–moderate public discussion era. climate.gov Halpert winter-outlook context: weaker events → less reliable CA/Southwest wet signal.
Sources: winter temperatures every El Niño · Halpert impacts post
Recent warm episode. Confirm class via CPC ONI/RONI tables; this page does not hardcode a strength class. Recent memory year for “look up the official table.” Still ban “this winter = 2023” claims later.
Sources: CPC ONI table · CPC RONI
Halpert: weak = peak ONI 0.5–0.9°C; CA/Southwest relationship especially mixed. Weak episodes are poor “clone years” for southern California rain hopes.
Source: Halpert
