272 WWUS76 KMTR 161538 NPWMTR URGENT - WEATHER MESSAGE National Weather Service San Francisco Bay Area 838 AM PDT Thu Mar 16 2023 CAZ506-512-529-161645- /O.EXP.KMTR.FR.Y.0013.000000T0000Z-230316T1600Z/ North Bay Interior Valleys-Santa Cruz Mountains- Northern Monterey Bay- 838 AM PDT Thu Mar 16 2023 ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... Temperatures are now in the upper 30s to lower 40s in the advisory area. Therefore, will let the Frost Advisory expire at 9 AM. $$ For more information from the National Weather Service visit https://weather.gov/mtr