Funnel Clouds Trigger Tornado Warnings in Merced County

MERCED COUNTY, Calif. (KFSN) — On March 17, 2025, funnel clouds were spotted in Merced County as thunderstorms swept through Central California, prompting multiple tornado warnings from the National Weather Service (NWS).

Funnel clouds were first captured on camera around 2:30 p.m. northeast of Atwater, California. Just ten minutes later, funnels were observed swirling near Vine and Almond streets, casting an ominous shadow over the area.

Chief Meteorologist Kevin Musso explained the urgency of the warnings issued: ‘Tornado watches are put out when we know conditions are favorable for severe thunderstorms. However, radar indicated significant rotation, necessitating immediate tornado warnings,’ he said.

Residents were alerted to take cover, with Musso recommending sheltering in substantial structures away from windows, and staying clear of trees that could fall during high winds. ‘Get into a significant structure, find low-lying areas, or stay in your car if that’s your only option,’ Musso advised.

These severe weather events follow a series of back-to-back storms that recently impacted Central California. On March 13, a winter storm blanketed low-lying areas in snow, leading to school dismissals around Tollhouse due to hazardous weather conditions. As conditions improved over the weekend, thunderstorms reemerged on Monday morning.

The funnel cloud activity extended beyond Merced County, with reports of similar formations in Mariposa County and Stanislaus County, emphasizing the need for vigilance among residents throughout the region.

By late afternoon on March 17, additional tornado warnings emerged, particularly for southern Tuolumne County and eastern Stanislaus County, as NWS reported severe thunderstorms capable of spawning tornadoes. One notable storm was tracking eastward at 20 mph, approximately eight miles northeast of Turlock.

The severe thunderstorm warning initially set to expire at 5:30 p.m. was extended to 5:45 p.m. for parts of Mariposa and Merced counties due to the continued threat of severe weather. The NWS warned residents to be prepared for possible damage to mobile homes, roofs, and vehicles due to the storms.

As evening approached, tornado warnings were lifted, although uncertainty remained regarding the potential for residual weather conditions. One storm that had been concerning, located 11 miles east of Turlock, was deemed no longer threatening.

Officials continued to urge caution and advised residents to stay updated via local news for developments, given the unpredictable weather patterns observed. The day served as a stark reminder of the volatile nature of Central California’s weather, highlighting the importance of preparedness as future storms could further impact the region.