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Record Summer Heat Across Much Of State Retreats; Some Deeper Thoughts On El Niño

After a truly searing start to summer across most of California, especially in the south, the last several weeks have felt rather mild by comparison. The record-breaking heatwaves of July, followed by record warm ocean temperatures later in the summer in SoCal, made for very uncomfortable conditions across some of California’s most densely populated regions for much of the summer. Meanwhile, in interior NorCal, record daytime highs were few and far between–but relentless overnight warmth and persistently above-average daytime temperatures again combined to produce record or near-record summer temperatures. Indeed: across many parts of southern and interior California, 2018 was the warmest summer on record.

Wrap-up Of California’s Dry/Warm Winter; “May Gray” Along The Coast And Persistent Mountain Showers Continue

Most of California was on track for one of its driest winters on record as recently as February as a result of persistent (one might even call it resilient) high pressure ridging along the West Coast during the first half of winter. Recall that December 2017 featured the largest wildfire in modern California history, following on the heels of the most destructive and deadly wildfire event in the state’s history just months earlier in October. Through late February, Sierra Nevada snowpack was tracking near its lowest level in recorded history–on par with the near-total snow drought of 2014-2015.