Jackson Wyoming simply skilled one of many coldest and snowiest Aprils within the final 100 years. All of it started with a precipitous drop in temperatures, following a excessive temperature of 62 levels on April eighth, 2022, 4 days later, the excessive on April 12th was solely 26 levels. That broke the report for the minimal excessive temperature for that date, which was 33 levels, set 48 years in the past, in 1974.
How Chilly Was April
The common excessive temperature in April 2022 within the City of Jackson was 44 levels, that’s eight levels colder than the long-term common. The common low temperature was 22 levels, or two levels cooler than common.
The imply temperature for April 2022, the typical of the month-to-month excessive and low temperatures, was 33 levels. That’s 5 levels colder than the long-term common imply temperature in April, which is 38 levels.
Combing via Jackson’s local weather data, going again to 1922, there have been solely six different Aprils that recorded a colder imply temperature, the coldest of these was 29 levels, again in 1928. Primarily based on month-to-month imply temperatures, April 2022 would rank because the seventh coldest April within the final 100 years.
How Snowy Was April
From the official local weather information for Jackson, of all of the Aprils with full data, there have solely been three different Aprils that have been snowier than this one, and people occurred over 50 years in the past.
April 2022 had 16 inches of snowfall recorded on the Jackson Local weather Station. That was simply shy of the full snowfall in April 1970 of 17 inches and the 18 inches that fell in April 1963. This April was eight inches wanting the all-time April snowfall report on the town of 24 inches, from April of 1967.
The common snowfall on the town in April is four inches. Final yr, April 2021, solely had 1.5 inches of snowfall.
It’s additionally value noting that this April’s 16 inches of snowfall bested January 2022’s whole of 15 inches and was additionally greater than the full snowfall acquired in February and March of 2022 mixed, which was 13 inches.
How Moist Was April
Whole precipitation on the town this April was 1.95 inches, which is 171-percent of the long-term common April precipitation of 1.14 inches. April 2022 would rank because the 13th wettest April within the final 100 years. That’s not precisely headline worthy, however this April was an enormous enchancment over final April’s precipitation, which was a measly 0.37 inches in April 2021.
April 1963 is the wettest April within the climate report books for Jackson, with 2.66 inches of precipitation. Second place was just some years in the past in 2019 when Jackson had 2.48 inches of precipitation in April.
Jackson’s whole precipitation on the town from October 1st, 2021, via April 30th, 2022, now stands at 9.08 inches, which is only a skosh above the long-term common precipitation throughout that seven month time interval.
Mountain Snow and Water
In case you are a powder skier, April was what we have been hoping for all of January, February and March. Sure, the mountains bought dumped on this April, which helped deliver the Snow Water Equal (SWE) within the Snake River Basin as much as 92-percent of regular on April 30th, 2022. At this similar time final yr, the SWE within the Snake River Basin was solely at 65-percent of common.
The water yr within the mountains begins on October 1st and SWE is one of the best indicator of how a lot water is saved within the snowpack. Sometimes, the numbers peak on the finish of April, when the mountain snowpack begins to soften in earnest.
SWE and precipitation numbers outlined listed here are based mostly on the averages on April 30th for the most recent 30-year interval, from 1991-2020.
General, the full precipitation, snow and rain mixed, within the Snake River Basin from October 1st, 2021, via April 30th, 2022, was 87-percent of regular. Final yr the precipitation whole for a similar time interval was at 80-percent of regular.
The Philips Bench SnoTel web site on Teton Cross, on the 8200-foot elevation, averages 28.four inches of precipitation from October 1st via April 30th. This yr the full was 26.four inches or two inches lower than common. Final yr on April 30th, 2021, the season’s precipitation whole was nearly solely 24.5 inches or four inches beneath common.
The underside-line right here is, we’re nonetheless slightly beneath regular with our snowpack and water within the mountains going into Could, however we’re actually forward of the place we have been final yr at this similar time, because of April’s bountiful snow.
Jim is the chief meteorologist at mountainweather.com and has been forecasting the climate in Jackson Gap and the Teton Vary for over 30 years.