Cloudy San Francisco Afternoon

Cloudy San Francisco Afternoon (Photo credit: Chon Kit Leong)

'Pineapple Express' To Linger, Bringing Steady Rain

Jenna Lane
March 20, 2018 - 2:41 pm

(KCBS RADIO) - What forecasters expect might be the last big rain fall this season is hitting California with a tropical punch. KCBS Radio's Jenna Lane reports on what's in store and how long it will linger.

This "pineapple express" also known as an atmospheric river gets its tropical nickname from the eastern Pacific where it gathers.

"The air is much warmer than our normal Gulf of Alaska storms, so the warmer air can hold more moisture," National Weather Service forecaster Steve Anderson said. "And that's what we're going to be seeing up in the mountains of Sonoma County, Santa Cruz Mountains as well. But really the brunt of this string of moisture will be from the Big Sur coast. Unfortunately down through Santa Barbara."

Anderson says unfortunate because of the danger of mudslides in Santa Barbara County. Because of the slow pace of the rainfall in the North Bay burn areas, forecasters do not expect slides or flooding there.

"It'll be a gradual amount of rain. There could be a short burst of heavy rainfall." Anderson continues. "We're just looking at a steady soaking rain."

By the time things begin to dry out over the weekend, this storm which Anderson says is probably our last of the season, might have brought the Bay Area a little closer to 60% percent of the normal amount of rainfall.