National Weather Service Reports Thunderstorms are Possible Beginning Sunday Afternoon in Mariposa County, Madera County and Merced County Details Last Updated: Sunday, 03 February 2019 05:35 Published: Sunday, 03 February 2019 05:35 View Comments February 3, 2019 - The National Weather Service Hanford Office reports a few thunderstorms are possible beginning Sunday afternoon from Fresno county northward, including Mariposa, Madera and Merced Counties.Source: NWS View the discussion thread. back to top