After the rain that occurred in the San Joaquin Valley on February 5-8, 2015, stable conditions developed under a ridge of high pressure resulting in dense fog development. The fog developed after 1 am on February 11, 2015 and became dense with visibility less than 1000 feet, especially along parts of Highway 41 and Highway 99 in Kings and Fresno counties. The fog lifted after 10 am on February 11, but redeveloped shortly after midnight in February 12. The densest fog occurred around sunrise, and impacted the areas from Corcoran to Fresno, along Highways 41, 43, and 99, with numerous schools reporting bus delays due to the fog. There was also dense fog in the Merced area on the morning of February 12. As stable conditions continued, dense fog once again developed during the early morning hours of Friday, February 13, 2015. On this morning, the dense fog was more widespread, but was farther west than previous nights, generally staying west of Highway 99, but extending from west of Merced southward through the center of the San Joaquin Valley to Hanford and Corcoran. The densest fog occurred west of Fresno with several traffic accidents with unknown injuries reported. This fog pattern repeated on the morning of Saturday, February 14, 2015.

Dense Fog in SE S.J. VALLEY, CALIFORNIA
From 11-FEB-15 00:55:00 to 11-FEB-15 09:35:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Visalia, Porterville, and Tulare AWOS observations reported visibility less than 1/4 mile.

Dense Fog in E CENTRAL S.J. VALLEY, CALIFORNIA
From 14-FEB-15 03:00:00 to 14-FEB-15 09:45:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Areas visibility less than 1/4 mile.

Dense Fog in W CENTRAL S.J. VALLEY, CALIFORNIA
From 12-FEB-15 06:00:00 to 12-FEB-15 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Several school districts had bus delays.

Dense Fog in E CENTRAL S.J. VALLEY, CALIFORNIA
From 12-FEB-15 06:00:00 to 12-FEB-15 09:03:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile, including the ASOS at Madera, Merced and Fresno. Numerous school bus delays.

Dense Fog in SW S.J. VALLEY, CALIFORNIA
From 12-FEB-15 03:53:00 to 12-FEB-15 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile, including the ASOS at Hanford. Several school bus delays.

Dense Fog in SE S.J. VALLEY, CALIFORNIA
From 12-FEB-15 04:15:00 to 12-FEB-15 08:35:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile across Tulare county, including the AWOS at Visalia. Several school bus delays.

Dense Fog in W CENTRAL S.J. VALLEY, CALIFORNIA
From 13-FEB-15 06:00:00 to 13-FEB-15 07:15:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Areas visibility less than 1/4 mile. Several school bus delays.

Dense Fog in E CENTRAL S.J. VALLEY, CALIFORNIA
From 13-FEB-15 05:53:00 to 13-FEB-15 07:15:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Areas visibility less than 1/4 mile. Several school bus delays.

Dense Fog in E CENTRAL S.J. VALLEY, CALIFORNIA
From 13-FEB-15 05:53:00 to 13-FEB-15 07:15:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Areas visibility less than 1/4 mile. Several school bus delays.

Dense Fog in E CENTRAL S.J. VALLEY, CALIFORNIA
From 11-FEB-15 01:40:00 to 11-FEB-15 08:40:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile. CHP reported some areas had visibility less than 700 feet. Fresno ASOS reported 1/16 mile visibility.

Dense Fog in SW S.J. VALLEY, CALIFORNIA
From 13-FEB-15 04:50:00 to 13-FEB-15 08:55:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile across Kings county. Several school bus delays.

Dense Fog in SW S.J. VALLEY, CALIFORNIA
From 11-FEB-15 02:30:00 to 11-FEB-15 09:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hanford ASOS reported visibility less than 1/4 mile for several hours.

Dense Fog in SE S.J. VALLEY, CALIFORNIA
From 13-FEB-15 04:50:00 to 13-FEB-15 06:15:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Areas visibility less than 1/4 mile across Tulare county.