South Lake Tahoe tied and broke temperature records this weekend and could tie the heat record again Wednesday, but cooler weather is on the way.
The South Shore would tie the previous temperature record for July 3 on Wednesday if the weather hits a forecasted high of 89 degrees, according to records from the National Weather Service andweather.com.
“Unseasonably hot conditions will continue into Wednesday across the region,” according to a Tuesday weather outlook for northeastern California and western Nevada issued by the National Weather Service in Reno. “The record-breaking heat should end by Thursday but conditions will still be warm with afternoon high temperatures 5 to 10 degrees above normal.”
“Thunderstorms will be widespread again on Wednesday across the region … with gusty winds … hail and localized heavy rain possible through at least Thursday,” according to the outlook. “Thunderstorms chances will decrease by Friday.”
Record temperatures were broken in South Lake Tahoe Friday, Sunday and Monday when the heat rose into the upper 80s. The highest mark of 91 came on Monday, which broke the previous record for July 1 by 5 degrees. Sunday’s observed temperature of 88 degrees also tied the previous mark for the date.
Part of the heat wave is normal summer heat spurts, said meteorologist Kenneth James of the Weather Prediction Center in College Park, Md. But there’s another factor and that’s the jet stream. Normally the jet stream moves generally west to east, but when it slows and swings dramatically to the north or south, extreme weather can happen.
Death Valley National Park tentatively recorded a high temperature of 129 degrees, which would tie the all-time June record high for the United States, the National Weather Service said Monday. It could take months to verify whether Sunday’s high beats the record set in 1902 at Volcano, a former town near the Salton Sea in southeastern California.
The reading, however, was definitely short of the all-time world record of 134 degrees set in Death Valley on July 10, 1913.
The Associated Press contributed to this story.