1 advisory is in effect for Mariposa County, CA. The most serious is a winter weather advisory.
Since 2016 the National Weather Service has issued about 265 alerts that included Mariposa County, roughly 27 a year. The most common is the flood advisory (137 from 2016 to 2025). The last tornado warning was issued on March 18, 2025. 3 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
Yosemite NP outside of the valley; San Joaquin River Canyon; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NPUntil · NWS Hanford CA
WINTER STORM WARNING HAS BEEN REPLACED BY WINTER WEATHER ADVISORY... ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM PST TUESDAY
Full alert text
* WHAT...Snow. Additional snow accumulations up to 6 inches.
* WHERE...Sierra Nevada above 6,000 feet.
* WHEN...Until 4 AM PST Tuesday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions will impact the Monday morning and evening commutes.
What to do: Slow down and use caution while traveling. The latest road conditions
for the state you are calling from can be obtained by calling 5 1 1.
Map data: NWS, OpenFreeMap, OpenStreetMap
Recent alerts in Mariposa County
Issued
Alert
Area
Nov 14, 11:50 AM EST
Winter Weather Advisory
Yosemite NP outside of the valley; San Joaquin River Canyon; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove
Mariposa County alert history
Alert events that included Mariposa County or its forecast zones, from the NWS warning archive.
3 tornadoes have been recorded in Mariposa County since 1950. That ranks 38 of 58 counties in California. The most recent was on February 2, 2019 (rated EF0).