Bay Area/ San Francisco
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Published on April 15, 2025
Bay Area Braces for Possible Thunderstorms, Lightning Threats on Wednesday: NWS San Francisco Issues Weather AdvisorySource: Tobias Kleinlercher / Wikipedia, CC BY-SA 3.0, via Wikimedia Commons

Bay Area residents should be aware of the potential thunderstorms forecast for Wednesday, as NWS San Francisco reports up to a 20% chance of thunderstorms across the region. "Isolated lightning strikes are the primary hazard," the agency cautions, warning of potential small hail and gusty winds during this period. The wise counsel from the NWS San Francisco to "stay weather aware and check back for updates" remains crucial, for when thunder roars, going indoors is the best safety measure, along with dashing inside upon the sight of a flash.

The Area Forecast Discussion from the National Weather Service elaborates on conditions expecting cooler temperatures through Thursday and seeing some warmth returning for the weekend, while the short-term outlook is currently looking at dry air and CIN that could dampen storm development today, though a few unexpected gusty winds or showers may still occur, as for the possibility of thunder, the forecasters have left that out for today due to low confidence in its happening.

According to the National Weather Service, look towards Wednesday, when we may see "showers and perhaps thunderstorm or two over the Central Coast and our portion of the southern Coastal Range. " The long-term outlook hints at drier weather starting Thursday, accompanied by breezier winds. In contrast, an increase in temperatures is anticipated over the weekend, falling in line with the natural rhythm of our California climate.

Regarding aviation, the latest reports indicate IFR/MVFR conditions predominating this morning, with gradual progress to VFR as we surpass the 19Z hour into early Wednesday. That said, a growing moist marine layer could complicate matters with more MVFR cigs expected by Wednesday, the Monterey Bay terminals face uncertainty due to the potential interference from higher cloud decks and the incoming upper level disturbance.

Mariners aren't left out of the forecast picture either, with "light to moderate winds last through much of the week," and moderate seas building as we inch closer to the weekend, come this Saturday and Sunday, the winds are looking to pick up the pace, the advice for the more diminutive vessels to be wary comes not a moment too soon.