Northerly synoptic flow behind a strong trough that moved southeast through central California allowed freezing air to move southward into the San Joaquin Valley.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 02:25:00 to 18-DEC-16 07:50:00 (PST-8)
Reported by: Mesonet

Between 0225 PST and 0750 PST the Coalinga (AU699) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 17-DEC-16 23:30:00 to 18-DEC-16 07:40:00 (PST-8)
Reported by: Mesonet

Between 2330 PST and 0740 PST the USCRN Site Near Gustine (GSTC1) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 05:00:00 to 18-DEC-16 05:00:00 (PST-8)
Reported by: Mesonet

At 0500 PST the Los Banos (CI056) station reported a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 05:16:00 to 18-DEC-16 07:00:00 (PST-8)
Reported by: Mesonet

Between 0516 PST and 0700 PST the Firebaugh (E5871) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 14:30:00 to 18-DEC-16 14:40:00 (PST-8)
Reported by: Mesonet

Between 1430 PST and 1440 PST the Merced at Route 99 (CF032) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 07:35:00 to 18-DEC-16 07:35:00 (PST-8)
Reported by: ASOS

At 0735 PST the Merced Regional Airport (KMCE) station reported a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 17-DEC-16 22:00:00 to 18-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 2200 PST and 0800 PST the Merced (CI148) station reported temperatures less than 28 degrees and a minimum temperature of 23 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 03:00:00 to 18-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0300 PST and 0800 PST the Merced II (CI188) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 02:45:00 to 18-DEC-16 02:45:00 (PST-8)
Reported by: Mesonet

At 0245 PST the Hilmer (AP201) station reported a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 03:30:00 to 18-DEC-16 07:45:00 (PST-8)
Reported by: Mesonet

Between 0330 PST and 0745 PST the Black Rascal Diversion Near Merced (BLQC1) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 18-DEC-16 04:13:00 to 18-DEC-16 07:13:00 (PST-8)
Reported by: Mesonet

Between 0413 PST and 0713 PST the Twisselman (TWMC1) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 18-DEC-16 02:00:00 to 18-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0200 PST and 0800 PST the Alpaugh (CI203) station reported temperatures less than 28 degrees and a minimum temperature of 24 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 18-DEC-16 05:00:00 to 18-DEC-16 07:00:00 (PST-8)
Reported by: Mesonet

Between 0500 PST and 0700 PST the Fountain Springs (FTNC1) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 18-DEC-16 06:28:00 to 18-DEC-16 07:03:00 (PST-8)
Reported by: Mesonet

Between 0628 PST and 0703 PST the Allensworth (AU642) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 03:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0300 PST and 0800 PST the Los Banos (CI056) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 04:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0400 PST and 0800 PST the Westlands (CI105) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 02:00:00 to 19-DEC-16 08:01:00 (PST-8)
Reported by: Mesonet

Between 0200 PST and 0801 PST the Coalinga (AU699) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 02:45:00 to 19-DEC-16 08:15:00 (PST-8)
Reported by: Mesonet

Between 0245 PST and 0815 PST the USCRN Site Near Gustine (GSTC1) station reported temperatures less than 28 degrees and a minimum temperature of 24 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 03:31:00 to 19-DEC-16 07:31:00 (PST-8)
Reported by: Mesonet

Between 0331 PST and 0731 PST the San Luis NWR (SLWC1) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 06:00:00 to 19-DEC-16 07:45:00 (PST-8)
Reported by: Mesonet

Between 0600 PST and 0745 PST the Mendota (MTACA) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 04:30:00 to 19-DEC-16 07:11:00 (PST-8)
Reported by: Mesonet

Between 0430 PST and 0711 PST the I-5 at Santa Nella (CF030) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 07:16:00 to 19-DEC-16 07:46:00 (PST-8)
Reported by: Mesonet

Between 0716 PST and 0746 PST the Firebaugh (E5871) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 06:00:00 to 19-DEC-16 06:00:00 (PST-8)
Reported by: Mesonet

At 0500 PST the Coalinga (CI205) station reported a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 03:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0300 PST and 0800 PST the Five Points SW (CI190) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 04:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0400 PST and 0800 PST the Five Points (CI002) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 00:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0000 PST and 0800 PST the Kesterson (CI092) station reported temperatures less than 28 degrees and a minimum temperature of 22 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 03:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0300 PST and 0800 PST the Panoche (CI124) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 03:35:00 to 19-DEC-16 05:05:00 (PST-8)
Reported by: Mesonet

Between 0335 PST and 0505 PST the Herndn (UP617) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 07:47:00 to 19-DEC-16 07:47:00 (PST-8)
Reported by: Mesonet

At 0747 PST the Merced (D4246) station reported a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 02:30:00 to 19-DEC-16 07:45:00 (PST-8)
Reported by: Mesonet

Between 0230 PST and 0745 PST the Black Rascal Diversion Near Merced (BLQC1) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 01:15:00 to 19-DEC-16 07:30:00 (PST-8)
Reported by: Mesonet

Between 0115 PST and 0730 PST the Hilmer (AP201) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 03:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0300 PST and 0800 PST the Madera II (CI188) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 18-DEC-16 23:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 2300 PST and 0800 PST the Merced (CI148) station reported temperatures less than 28 degrees and a minimum temperature of 24 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 03:45:00 to 19-DEC-16 04:30:00 (PST-8)
Reported by: ASOS

Between 0345 PST and 0430 PST the Merced Regional Airport (KMCE) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 19-DEC-16 04:31:00 to 19-DEC-16 06:21:00 (PST-8)
Reported by: Mesonet

Between 0431 PST and 0621 PST the Buttonwillow (AT285) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 19-DEC-16 00:25:00 to 19-DEC-16 04:55:00 (PST-8)
Reported by: Mesonet

Between 0025 PST and 0455 PST the Sunflower Valley (AU172) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 19-DEC-16 07:10:00 to 19-DEC-16 07:45:00 (PST-8)
Reported by: ASOS

Between 0710 PST and 0745 PST the Hanford Municipal Airport (KHJO) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 19-DEC-16 06:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0600 PST and 0800 PST the Blackwells Corner (CI054) station reported temperatures less than 28 degrees and a minimum temperature of 26 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 19-DEC-16 01:01:00 to 19-DEC-16 01:41:00 (PST-8)
Reported by: Mesonet

Between 0101 PST and 0141 PST the Route 46 at Kecks Road (CF084) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 19-DEC-16 00:00:00 to 19-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0000 PST and 0800 PST the Alpaugh (CI203) station reported temperatures less than 28 degrees and a minimum temperature of 22 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 19-DEC-16 06:40:00 to 19-DEC-16 07:36:00 (PST-8)
Reported by: Mesonet

Between 0640 PST and 0736 PST the Allensworth (AU642) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 20-DEC-16 02:55:00 to 20-DEC-16 08:55:00 (PST-8)
Reported by: Mesonet

Between 0255 PST and 0855 PST the Tulare (UP687) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 20-DEC-16 04:00:00 to 20-DEC-16 07:25:00 (PST-8)
Reported by: Mesonet

Between 0400 PST and 0725 PST the Allensworth (AU642) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 20-DEC-16 06:00:00 to 20-DEC-16 06:00:00 (PST-8)
Reported by: Mesonet

At 0600 PST the Fountain Springs (FTNC1) station reported a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 20-DEC-16 01:00:00 to 20-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0100 PST and 0800 PST the Alpaugh (CI203) station reported temperatures less than 28 degrees and a minimum temperature of 22 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 20-DEC-16 04:41:00 to 20-DEC-16 08:31:00 (PST-8)
Reported by: Mesonet

Between 0441 PST and 0831 PST the Buttonwillow (AT285) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 20-DEC-16 01:11:00 to 20-DEC-16 07:41:00 (PST-8)
Reported by: Mesonet

Between 0111 PST and 0741 PST the Route 46 at Kecks Road (CF084) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 20-DEC-16 06:20:00 to 20-DEC-16 07:25:00 (PST-8)
Reported by: ASOS

Between 0620 PST and 0725 PST the Hanford Municipal Airport (KHJO) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 20-DEC-16 07:00:00 to 20-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0700 PST and 0800 PST the Blackwells Corner (CI054) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 07:00:00 to 20-DEC-16 07:10:00 (PST-8)
Reported by: ASOS

Between 0700 PST and 0710 PST the Merced Regional Airport (KMCE) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 00:00:00 to 20-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0000 PST and 0800 PST the Merced (CI148) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 06:32:00 to 20-DEC-16 07:11:00 (PST-8)
Reported by: Mesonet

Between 0632 PST and 0711 PST the Merced at 99 South of La Grand Road (CF108) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 04:00:00 to 20-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0400 PST and 0800 PST the Madera II (CI188) station reported temperatures less than 28 degrees and a minimum temperature of 25 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 04:15:00 to 20-DEC-16 05:45:00 (PST-8)
Reported by: Mesonet

Between 0415 PST and 0545 PST the Hilmer (AP201) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 05:45:00 to 20-DEC-16 07:15:00 (PST-8)
Reported by: Mesonet

Between 0545 PST and 0715 PST the Black Rascal Diversion Near Merced (BLQC1) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 06:00:00 to 20-DEC-16 07:40:00 (PST-8)
Reported by: Mesonet

Between 0600 PST and 0740 PST the Coalinga (AU699) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 03:45:00 to 20-DEC-16 08:20:00 (PST-8)
Reported by: Mesonet

Between 0345 PST and 0820 PST the USCRN Site Near Gustine (GSTC1) station reported temperatures less than 28 degrees and a minimum temperature of 23 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 05:31:00 to 20-DEC-16 05:31:00 (PST-8)
Reported by: Mesonet

At 0531 PST the San Luis NWR (SLWC1) station reported a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 04:46:00 to 20-DEC-16 04:46:00 (PST-8)
Reported by: Mesonet

At 0446 PST the Firebaugh (E5871) station reported a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 03:00:00 to 20-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 0300 PST and 0800 PST the Panoche (CI124) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-DEC-16 22:00:00 to 20-DEC-16 08:00:00 (PST-8)
Reported by: Mesonet

Between 2200 PST and 0800 PST the Kesterson (CI092) station reported temperatures less than 28 degrees and a minimum temperature of 23 degrees Fahrenheit.

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 20-DEC-16 04:00:00 to 20-DEC-16 07:00:00 (PST-8)
Reported by: Mesonet

Between 0400 PST and 0700 PST the Five Points (CI002) station reported temperatures less than 28 degrees and a minimum temperature of 27 degrees Fahrenheit.