An unusually cold storm for late May brought damaging hail over the northern Sacramento Valley, up to 2-3 inches in diameter. Flash flooding, damaging winds, funnel clouds, and high mountain snow were also observed.

Flash Flood in PLACER, CALIFORNIA
From 23-MAY-19 14:04:00 to 23-MAY-19 20:00:00 (PST-8)
Location: COLFAX
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

There was 1 1/2 feet of water flooding the west bound lane of I80.

Flash Flood in PLACER, CALIFORNIA
From 23-MAY-19 14:22:00 to 23-MAY-19 17:22:00 (PST-8)
Location: SHADY GLEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding on State Route 124 on Placer County side of border just east of Bear River.

Flash Flood in PLACER, CALIFORNIA
From 23-MAY-19 14:35:00 to 23-MAY-19 18:35:00 (PST-8)
Location: COLFAX
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding of entire west bound off-ramp of I80 in Colfax.

Hail in SHASTA, CALIFORNIA
From 24-MAY-19 18:52:00 to 24-MAY-19 19:02:00 (PST-8)
Location: PROJECT CITY
Magnitude: 1.75 
Property damage: 0.00M
Reported by: Social Media

Golf ball size hail reported in Shasta Lake City. Pictures seen on Twitter.

Hail in SHASTA, CALIFORNIA
From 24-MAY-19 19:10:00 to 24-MAY-19 19:40:00 (PST-8)
Location: ENTERPRISE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball size hail was reported in Redding.

Funnel Cloud in SHASTA, CALIFORNIA
From 24-MAY-19 19:15:00 to 24-MAY-19 19:20:00 (PST-8)
Location: (RDD)REDDING BENTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A funnel cloud was reported in southwest Redding. No touchdown or damage was reported.

Hail in SHASTA, CALIFORNIA
From 24-MAY-19 19:12:00 to 24-MAY-19 19:17:00 (PST-8)
Location: ENTERPRISE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail was reported near Enterprise High School in Redding.

Hail in SHASTA, CALIFORNIA
From 24-MAY-19 19:13:00 to 24-MAY-19 19:18:00 (PST-8)
Location: ENTERPRISE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

On Twitter, a user reported ping pong ball sized hail near Hartnell Ave and Victor Ave in Redding, CA.

Thunderstorm Wind in SHASTA, CALIFORNIA
From 24-MAY-19 19:53:00 to 24-MAY-19 19:58:00 (PST-8)
Location: REDDING MUNI ARPT
Magnitude: 50.00 MG
Reported by: ASOS

At Redding Airport, a 58 MPH wind gust was reported.

Thunderstorm Wind in BUTTE, CALIFORNIA
From 24-MAY-19 21:00:00 to 24-MAY-19 21:05:00 (PST-8)
Location: PULGA
Magnitude: 50.00 MG
Reported by: Mesonet

A PGE weather station on Concow Road at an elevation of 2785 feet reported a 58 MPH wind gust. Prior to this observation the station reported gusts between 35-44 MPH.

Hail in SHASTA, CALIFORNIA
From 24-MAY-19 19:05:00 to 24-MAY-19 19:20:00 (PST-8)
Location: ENTERPRISE
Magnitude: 2.50 
Reported by: Public

Multiple reports of golf ball to tennis ball size hail reported on the east side of Redding. from 8:05 pm to 8:20 pm. pictures sent to us via Facebook.

Hail in SHASTA, CALIFORNIA
From 24-MAY-19 19:05:00 to 24-MAY-19 19:20:00 (PST-8)
Location: ENTERPRISE
Magnitude: 3.00 
Property damage: 7.50K
Reported by: NWS Employee

There were numerous reports of large hail across the Redding area, including a photo of hail from the family of an NWS employee showing oblong hail as large as 3 inches in diameter. Hail this size is rare in California and is near record size. Many cars were dented or had back windows or windshields broken. A preliminary estimate of damage to hail is based on a KRCR story of up to 3000 cars damaged and a national average of $2500 for damage repairs (Auto Trends).  This works out to rough estimated of around $7.5 million for auto damage alone. Some building damage was also reported, including the Northern California Geographic Area Coordination Center, which suffered damage to a new roof.