High pressure over the west coast brought stable conditions and areas of dense fog over the San Joaquin Valley on February 19-20, 2015. Dense fog began developing around midnight on February 19, becoming widespread by early morning particularly in from Merced to Madera and in the Hanford, Lemoore, and Visalia areas along Highway 198. Several school districts reported bus delays. Several injury traffic accidents were also reported. There was also one fatality as a car collided with a pole in Visalia. The dense fog lifted around 1030 PST. Areas of dense fog redeveloped after 2300 PST on February 19 and persisted through 0900 PST on February 20. The fog was particularly dense in the Fresno and Lemoore areas where visibility was less than 1/8 mile, as well as in Kern county along Highway 99 where visibility less than 200 feet resulted in CHP pacing traffic along Highway 99 through and just north of Bakersfield. By mid morning of February 20, the dense fog lifted into a low stratus deck which persisted over the San Joaquin Valley through day and into the Saturday, February 21, 2015.

Dense Fog in W CENTRAL S.J. VALLEY, CALIFORNIA
From 19-FEB-15 07:00:00 to 19-FEB-15 10:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Several school districts had bus delays due to the dense fog.

Dense Fog in E CENTRAL S.J. VALLEY, CALIFORNIA
From 19-FEB-15 00:15:00 to 19-FEB-15 10:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile, including at the Merced and Madera ASOS. Several school districts had bus delays due to the dense fog. There were several traffic collisions in which reduced visibility was a factor. Two of these collisions resulted on minor injuries. One injury occurred in a collision involving two vehicles near Kingsburg. The other injury occurred near Selma where a vehicle overturned.

Dense Fog in SW S.J. VALLEY, CALIFORNIA
From 18-FEB-15 23:53:00 to 19-FEB-15 10:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile in Kings county, including at the Hanford ASOS. Lemoore ASOS reported visibility of 1/16 mile. Several school districts had bus delays due to the dense fog.

Dense Fog in SE S.J. VALLEY, CALIFORNIA
From 18-FEB-15 21:55:00 to 19-FEB-15 10:30:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile in Kings county, including at the Hanford ASOS. Lemoore ASOS reported visibility of 1/16 mile. Several school districts had bus delays due to the dense fog. There was a fatality traffic accident when a Dodge truck collided with a pole in Visalia around 0400 PST on February 19.

Dense Fog in E CENTRAL S.J. VALLEY, CALIFORNIA
From 20-FEB-15 00:53:00 to 20-FEB-15 07:53:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile. Fresno ASOS reported 1/8 mile for several hours resulting in airport delays.

Dense Fog in SW S.J. VALLEY, CALIFORNIA
From 19-FEB-15 23:10:00 to 20-FEB-15 08:56:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile. Lemoore ASOS reported 1/16 mile for several hours.

Dense Fog in SE S.J. VALLEY, CALIFORNIA
From 20-FEB-15 04:51:00 to 20-FEB-15 08:56:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread visibility less than 1/4 mile. CHP pacing traffic along Highway 99 due to visibility less than 200 feet.