A late season deep upper level trough moved southward along the California coast bringing rain and gusty winds to the region. Scattered convection was produced in the wake of an associated cold front bringing widespread small hail, thunder, and lightning to the region.

Lightning in SANTA CLARA, CALIFORNIA
From 16-APR-18 08:30:00 to 16-APR-18 08:32:00 (PST-8)
Location: CAMPBELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Media reported that a private jet was struck by lightning 5 miles west of Mineta San Jose International Airport.

Hail in ALAMEDA, CALIFORNIA
From 16-APR-18 06:20:00 to 16-APR-18 06:25:00 (PST-8)
Location: OAKLAND
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small accumulating hail observed in Oakland.

Hail in ALAMEDA, CALIFORNIA
From 16-APR-18 06:35:00 to 16-APR-18 06:40:00 (PST-8)
Location: OAKLAND
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail observed in east Oakland.

Hail in ALAMEDA, CALIFORNIA
From 16-APR-18 07:35:00 to 16-APR-18 07:40:00 (PST-8)
Location: BERKELEY
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail reported in Berkeley.

Hail in MONTEREY, CALIFORNIA
From 16-APR-18 07:40:00 to 16-APR-18 07:45:00 (PST-8)
Location: CARMEL
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail reported in downtown Carmel.

Hail in CONTRA COSTA, CALIFORNIA
From 16-APR-18 07:56:00 to 16-APR-18 08:01:00 (PST-8)
Location: ORINDA
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail along with thunder and lightning reported in Orinda.

Hail in SANTA CLARA, CALIFORNIA
From 16-APR-18 08:16:00 to 16-APR-18 08:21:00 (PST-8)
Location: SAN JOSE
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail reported at San Jose State University.

Hail in MONTEREY, CALIFORNIA
From 16-APR-18 09:06:00 to 16-APR-18 09:11:00 (PST-8)
Location: PACIFIC GROVE
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media video showing small hail in Pacific Grove.

Hail in MONTEREY, CALIFORNIA
From 16-APR-18 07:58:00 to 16-APR-18 08:03:00 (PST-8)
Location: MONTEREY PNSLA ARPT
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Small accumulating hail outside the NWS office in Monterey.

Hail in ALAMEDA, CALIFORNIA
From 16-APR-18 08:00:00 to 16-APR-18 08:05:00 (PST-8)
Location: OAKLAND
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Media report showing accumulating small hail in Oakland.

Hail in MONTEREY, CALIFORNIA
From 16-APR-18 09:15:00 to 16-APR-18 09:20:00 (PST-8)
Location: DEL REY OAKS
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Small accumulating hail in Del Rey Oaks.

Hail in MARIN, CALIFORNIA
From 16-APR-18 09:27:00 to 16-APR-18 09:32:00 (PST-8)
Location: MILL VLY
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail reported in Mill Valley.

Hail in CONTRA COSTA, CALIFORNIA
From 16-APR-18 12:40:00 to 16-APR-18 12:45:00 (PST-8)
Location: COWELL
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail reported in southern Contra Costa county.

Hail in SANTA CLARA, CALIFORNIA
From 16-APR-18 16:20:00 to 16-APR-18 16:25:00 (PST-8)
Location: HOLY CITY
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail reported this afternoon on Mt. Umunhum.

Hail in SANTA CRUZ, CALIFORNIA
From 16-APR-18 16:23:00 to 16-APR-18 16:28:00 (PST-8)
Location: RIVERSIDE GROVE
Magnitude: 0.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Small hail has been falling most of the day in the Santa Cruz Mountains near Los Gatos.