This piece digs into a wild three-day storm that drenched the Bay Area, spun up a rare tornado near Vina, and dumped a heavy load of Sierra snow. It sent ripples through Marin County towns from San Rafael to Sausalito.
Residents watched rainfall totals and checked road conditions, wondering what would come next. Local meteorologists warned about slick surfaces overnight and said the cool pattern would probably stick around into early next week.
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Overview of the Bay Area storm and its reach
From the North Bay’s chile-red hills to San Francisco’s fog-kissed coast, the storm changed things fast. Marin County readers felt the wet weather, and crews kept an eye on creek levels and road surfaces as the showers faded Sunday afternoon.
Rain totals by region
The North Bay took the brunt of it, with Healdsburg and Windsor topping the charts. Other busy corridors in the Bay Area got a good soaking too, while the South Bay saw lighter totals overall.
- North Bay: Healdsburg and Windsor each picked up more than 3 inches; Santa Rosa saw around 2.5 inches.
- Hayward and East Bay: A sharp burst dropped about 4.6 inches near Hayward, and much of the inner East Bay landed in the 2–3 inch range.
- San Francisco and the Peninsula: The city collected about 1.75 inches, and the Peninsula sat at roughly 1.5–2 inches.
- South Bay and eastern Contra Costa: Totals stayed under an inch in San Jose, Sunnyvale, Livermore, and eastern Contra Costa County.
Sierra Nevada snow and closures
The storm didn’t stop at the foothills. Several inches of new snow fell at lake level in Tahoe, and 1–2 feet piled up above 8,000 feet.
The Central Sierra Snow Lab measured over 21 inches by Sunday morning. Snow dropped as low as 4,500 feet, which briefly shut down I‑80 near Donner Summit. In Mammoth, the lodge picked up about 12 inches, and the summit got 18 inches in just 24 hours.
- Weather impacts: Drivers faced tough conditions on mountain passes, and highways closed from time to time.
- April storm significance: Meteorologists called this the wettest April storm for the Bay Area since 2018, which helped bring Sierra totals to 3–4 feet for April after a nearly snowless March.
A rare EF‑U tornado near Vina
The storm even spun up a brief EF‑U tornado about 4 miles southeast of Vina, around 20 miles northeast of Chico. It lasted about a minute and didn’t cause any reported damage or injuries, but it definitely highlighted the storm’s unsettled air and the Bay Area’s knack for weird weather.
Marin County focus: local conditions and outlook
Across Marin County, towns like San Rafael, Novato, Mill Valley, and Tiburon dealt with wet roads and cautious drivers as the system moved through. Forecasters expected more cool, damp nights, lingering moisture in low spots, and a slow warm-up.
What to watch for and how residents should respond
- Travel safety: Roads can stay slick, so it’s smart to allow extra time for commutes through Sausalito, Larkspur, and Ross—especially on bridges and right after heavy rain.
- Creeks and drainage: Local streams might rise, so folks near Corte Madera Creek and San Geronimo Creek should keep an eye out for pooling or minor flooding.
- Property protection: Check gutters and downspouts in places like San Anselmo and Fairfax to head off leaks and water sneaking in.
- Public advisories: Stay tuned to Marin County and Marin Municipal Water District for any boil-water notices or flood warnings.
Looking ahead: why this storm matters for the Bay Area and Sierra
The Bay Area’s April storm record just shows how vulnerable the region is to wild weather—even in spring. Heavy North Bay rainfall and deep Sierra snow could affect watershed health, reservoir levels, and flood risk in Marin and neighboring counties.
Local resilience and planning notes
- Water resources: Higher runoff could boost reservoir inflows. It might also put some real pressure on storm-water systems in Marin’s coastal towns.
- Road maintenance: Agencies plan to monitor slick patches on Highway 1 and the roads that snake into Mt. Tamalpais State Park. Better safe than sorry, right?
- Community updates: Keep an eye on the Marin Voice for real-time road conditions. They’ll share safety tips as breezy interludes sweep in after the rain.
Marin County’s watching the next weather system roll in. Folks should enjoy the fresh air once things clear up, but don’t forget about those slick streets, rising creeks, and the stubborn chill that lingers after a wet April storm.
The Marin County Journal will keep bringing updates from San Rafael to Novato—and everywhere in between.
Here is the source article for this story: Bay Area rain continues for third day as thunderstorms linger
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