![]() ![]() The three-year La Nina from 1998-99 through 2000-01 was the last such event. If the La Nina does indeed continue, there is potential for not only the next winter to be under La Nina influence yet again, but it could be the first three-year La Nina that has occurred in over 20 years. The Climate Prediction Center issued an advisory on June 9, stating the La Nina conditions were favored to continue through at least the end of the year. San Jacinto was not far behind with 5.19 inches. WeatherCurrents' station in Perris recorded the lowest season total in the WeatherCurrents network this year, with only 5.16 inches. An exception to this rule was Moreno Valley, where 8.81 inches was recorded for the season. The eastern valleys fared worse, with season totals mostly in the 5-7 inch range. Areas around the Temecula Valley generally recorded just over 8 or 9 inches for the season, including Temecula Valley's Wine Country with 9.97 inches (courtesy of Jim Sappington). Elsewhere, season totals fell short of 10 inches, and were generally within 50 to 80 percent of averages. In East Highland, an exceptionally high season total of 29.20 inches was reported - due to unusually persistent, heavy rainfall during December (courtesy of Peter Michas). Simi Valley, like much of the Los Angeles Basin south and east of it, benefited greatly from one particular storm in late December - which badly missed the rest of the region. However, Anza's season total is not considered to be accurate due to overreporting rainfall in December, and that season total is likely around 3 inches higher than it should be (roughly 9 inches). Season totals exceeded 12 inches at two WeatherCurrents stations, in Simi Valley and Anza. Much of the region last saw measurable precipitation in April. A small number of mostly weak systems managed to pad season totals in February and March, with one thunderstorm-laden event in late March being somewhat notable. November was kept dry by a persistent blocking pattern throughout the entire month, and following the region's wet December, a stubborn dry pattern once again gripped much of the entire state in January - and for most of the remainder of the water year. Outside of those two months, remained a largely inactive, quiet rainy season. October 2021 was the only other month of the season with even semi-consistent storm patterns. For virtually all locations across the region, December 2021 was the wettest period of the winter, where a significant portion of the season's total rainfall fell alone. Most WeatherCurrents stations with accurate season totals finished the 2021-2022 water year with less than 10 inches of rainfall - however, in the majority of locations, seasonal rainfall for 2021-2022 still exceeded that of the previous year, 2020-2021. ![]() California witnessed another La Nina winter, for the second time in a row during the 2021-2022 water year, with the resultant seasonal rainfall for much of the region once again ending below-average. ![]()
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