A cool and dry airmass coupled with light winds resulted in cold morning temperatures from April 20th to the 24th in the Sacramento and Northern San Joaquin Valleys and adjacent foothills. Record low temperatures were set in several locations. Frost and freezing temperatures caused significant damage to young walnuts, prunes, peaches, pears, and wine grapes across the area.

Frost/Freeze in NORTHERN SAN JOAQUIN VALLEY, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: ASOS

A cool airmass along with light winds allowed temperatures to drop to 32 degrees at the Stockton Airport. This broke the daily low temperature record of 35 degrees set in 1967. Frost damage to wine grapes was reported, along with walnuts and some orchard fruits.

Frost/Freeze in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: ASOS

A cool airmass along with light winds allowed morning temperatures at the Redding Airport to reach 31 degrees, setting a new daily low temperature record. This broke the old record of 35 degrees set at the airport in 1996, and at the old city station in 1984. Frost damage to young walnuts was reported over portions of the northern Sacramento Valley.

Frost/Freeze in SOUTHERN SACRAMENTO VALLEY, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: ASOS

A cool, dry airmass with light winds allowed temperatures to drop to 34 degrees at the Sacramento Exectuive Airport on April 20th, setting a new daily low temperature record. The old record was 36 degrees, set in 1967. Some frost damage to grapes was reported over portions of the southern Sacramento valley.

Frost/Freeze in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: ASOS

A new daily low temperature record of 31 degrees was set at the Redding Airport, breaking the old record of 35 degrees set in 1996 and at the old city station back in 1984. Freezing temperatures and frost damaged young walnuts, pecans and wine grapes in parts of Shasta and Tehama counties.

Frost/Freeze in MOTHERLODE/CAMPTONVILLE TO GROVELAND, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: Newspaper

Freezing temperatures and frost damaged wine grapes and apples in the foothills of Yuba, Nevada, Placer, El Dorado, Amador, and Calaveras counties.

Frost/Freeze in CLEAR LAKE/SOUTHERN LAKE COUNTY, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: Newspaper

Freezing temperatures and frost damaged young walnuts and wine grapes in portions of Lake County.

Frost/Freeze in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: Newspaper

Freezing temperatures and frost damaged young walnuts and wine grapes in portions of Lake County.

Frost/Freeze in MOUNTAINS SOUTHWEST SHASTA COUNTY TO NORTHERN LAKE COUNTY, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: Newspaper

Freezing temperatures and frost damaged wine grapes in the foothills  of Shasta, Butte, and Tehama counties.

Frost/Freeze in CENTRAL SACRAMENTO VALLEY, CALIFORNIA
From 20-APR-08 00:00:00 to 20-APR-08 23:59:00 (PST-8)
Reported by: Newspaper

A cool airmass and light morning winds brought cold lows and frost to the area. Walnuts, peaches, prunes, and canning tomatoes were reported to have suffered frost damage in some areas, particularly in Butte and Sutter counties.