California County south of Tahoe receives 2.2 inches of rain per hour

Thunderstorms lashed parts of the Sierra Nevada east of Lake Tahoeextending from Reno to CaliforniaHeavy rain, road flooding and mudslides are expected in Alpine County this week, the National Weather Service said.

“Typically every summer we see monsoonal moisture that varies from year to year in terms of how long and how strong it is,” said expert Wendell Hohmann. weather service in the Reno office. “This year came a bit late. We were pretty dry until mid-July, and then the door finally opened to let us in.

Thunderstorms occurred as monsoonal moisture moved northward from the desert southwest into California and Nevada.


A gauge in Markleeville, Alpine County, 30 miles southeast of South Lake Tahoe, recorded 2.49 inches of rain in 90 minutes Wednesday. “It was 2.2 inches in 60 minutes — that’s how intense it was,” Hohmann said. Monitor Pass saw 0.8 inches of rain Thursday, he said.

Debris flows crossed Hot Springs Road, piling up large boulders on the road, Grover Hot Springs State Park officials and the California Highway Patrol said on Wednesday.

Highway 89 in the Markleeville area of ​​Alpine County is closed due to severe flooding, Caltrans said.

Caltrans

The Tamarack Fire was burning in the Markleeville area in 2021, and on Wednesday the weather service issued flash flood due to burn scar, followed by – a flash flood warning thursday

“This is an extremely dangerous situation! Seek higher ground now,” the weather service said Wednesday.

Highway 89 from Turtle Rock to Markleeville is closed and not expected to reopen after mud and debris washed out part of the road. officials said. The state road to Turtle Rock Park is also closed due to a mudslide.

The Tahoe area was spared the heavy rain, but Hohmann said there is a possibility of thunderstorms Friday.

Between 7:45 PM and 8:45 PM Wednesday, the Reno Airport reported 1.22 inches of rainfall due to severe thunderstorms. the weather service said. That’s more rain than the airport has seen in the past seven months.

“Through Wednesday, the airport had only seen 0.74 inches since Jan. 1.” until Tuesday,” Hohmann said.

The airport’s official gauge recorded another 0.24 inches Thursday, though Hohmann said another gauge on the south runway saw inches of rain.

Weather service issued Several flash floods are under watch for the Reno region Wednesday and Thursday, and the Reno Fire Department is on Wednesday said some he saved some motorists from flooded roads on Wednesday.

More thunderstorms are expected in the Reno region on Friday flash flood watch remains valid.

Monsoon refers to the seasonal change in wind patterns in a region. The summer monsoon is associated with increased thunderstorm activity; In North America, winds pull moisture from the Pacific Ocean and Gulf of Mexico and carry it to the southwestern United States

The summer monsoon is a typical weather pattern that is most pronounced in the inland southwestern states of Arizona and New Mexico. At times, the moisture will push north into California, the weather service said.

When monsoonal moisture enters Northern California, lightning tends to be more frequent in the Sierra Nevada than along the coast due to the absence of the marine layer and its topography in the mountains. The air mass is forced to rise, the thunderstorm is intensifying, the meteorological service reported.

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