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El Niño Winter Snow Outlookby plusbeauxjours

Will Casper get snow this winter? El Niño 2026-27 outlook

Not a forecastNOAA outlook issued Sep 17, 2026. Next update Oct 15, 2026.

Casper, WY

Snow in past strong El Niño winters

Winters with above-normal snow

5 of 8

In 5 of 8 strong El Niño winters, Casper got above-normal snow (median 105% of normal).

Normal: 71.8 in per season (NOAA 1991–2020 normal).

Seasonal snowfall at Casper, WY in strong El Niño winters
Winter% of normal
1957-5874.4 inPeak ONI 1.69 / RONI 1.89104%
1965-6662.3 inPeak ONI 1.82 / RONI 1.9987%
1972-73116.8 inPeak ONI 1.84 / RONI 1.97163%
1982-83Big 3151.6 inPeak ONI 2.14 / RONI 2.40211%
1991-9246.7 inPeak ONI 1.54 / RONI 2.1265%
1997-98Big 3No dataPeak ONI 2.37 / RONI 2.28—
2009-1075.8 inPeak ONI 1.50 / RONI 1.50106%
2015-16Big 386.6 inPeak ONI 2.59 / RONI 2.25121%
2023-2442.8 inPeak ONI 1.99 / RONI 1.4260%

Snowfall from NOAA station record Casper Area (ThreadEx; current station CASPER-NATRONA COUNTY AP) (CPRthr, 5,319 ft).

Past strong El Niño winters are a guide, not a forecast. Every El Niño is different: this one comes with a negative PDO, which NOAA says may dampen typical impacts.

NOAA Dec–Feb outlook

Official
Temperature
Equal chances
Precipitation
Equal chances

Equal chances: NOAA sees no strong tilt toward above- or below-normal precipitation here this winter.

Issued Sep 17, 2026 by NOAA's Climate Prediction Center. Next update Oct 15, 2026.

El Niño now

NOAA status
El Niño Advisory
RONI, JAS 2026
+1.69 °C
Chance of very strong (≥ +2.0 °C) in Dec–Feb
75%

NOAA status: El Niño Advisory. El Niño is strengthening, with a greater than 90% chance of a very strong event during the Northern Hemisphere fall and winter 2026-27. (NOAA CPC, Sep 10, 2026.)

Casper in short

NOAA's Dec–Feb 2026-27 outlook for Casper: temperature equal chances; precipitation equal chances.

Among the 8 strong El Niño winters with complete records, the snowiest here was 1982-83 (151.6 in, 211% of normal) and the least snowy was 2023-24 (42.8 in, 60% of normal).

In the “Big Three” El Niño winters it recorded 1982-83 (151.6 in, 211% of normal), no complete data for 1997-98, 2015-16 (86.6 in, 121% of normal).

Not a forecast

This is not a weather forecast. Seasonal outlooks are probabilities from NOAA's Climate Prediction Center; past El Niño winters show what happened, not what will happen. Snowfall is from NOAA station records (ACIS) and may contain gaps or station changes. For forecasts and warnings, use weather.gov. Not affiliated with NOAA/NWS.

About this station

  • Station: Casper Area (ThreadEx; current station CASPER-NATRONA COUNTY AP), ACIS id CPRthr, GHCN USW00024089.
  • Matched by station name.

How we pick stations and count winters: method & sources. Last updated .