Broad surface low pressure  lingered offshore of the GA/SC Atlantic coast as the parent upper level tough deepened over the eastern CONUS. A surface cold front was just
NW of the Altamaha River Basin early in the morning.
Waves of showers and isolated thunderstorms moved across the area under moist SW steering flow. Convection increased in intensity in the afternoon due to diurnal heating
interacting with the surface front, lingering outflows from past storms, and coastal convergence as NE flow funneled southward down the Atlantic coast as the surface front edged farther south across N Florida.
PWAT values of near 2 inches with the weak front and slow storm motion under upper level lift all favored heavy rainfall potential.

Flood in DUVAL, FLORIDA
From 26-JUN-17 16:57:00 to 26-JUN-17 17:05:00 (EST-5)
Location: EAST MANDARIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reports of flooding from the Mandarin area were relay to the NWS. At 5:57 pm, the public reported via social media 8-12 inches of water covered Beauclerc and Scott Mill Road. At 6:05 pm, the public relayed a video of water flowing over Mandarin Road near Riverplace Drive.

Flood in DUVAL, FLORIDA
From 26-JUN-17 16:26:00 to 26-JUN-17 16:27:00 (EST-5)
Location: JACKSONVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Parts of downtown Jacksonville were flooded included Main Street at Church Street and at North Liberty Street at Church Street. Portions of roadways in these areas were completely flooded.

Flood in ST. JOHNS, FLORIDA
From 26-JUN-17 16:52:00 to 26-JUN-17 16:52:00 (EST-5)
Location: DURBIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported 1 foot of rainfall across County Road 210 between Highway 1 and Interstate 95.

Hail in DUVAL, FLORIDA
From 26-JUN-17 16:19:00 to 26-JUN-17 16:19:00 (EST-5)
Location: SUNBEAM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime size hail was reported near Old St. Augustine Road and Interstate 95.

Lightning in DUVAL, FLORIDA
From 26-JUN-17 15:53:00 to 26-JUN-17 15:53:00 (EST-5)
Location: GOODBYS
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A home was struck by lightning on Tawa Trail. Smoke filled the home. The cost of damage was unknown, but it was estimated for Storm Data.

Lightning in DUVAL, FLORIDA
From 26-JUN-17 15:54:00 to 26-JUN-17 15:54:00 (EST-5)
Location: SAN JOSE
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A home was struck by lightning. Smoke was coming from the refrigerator. The cost of damage was unknown, but it was estimated for Storm Data.

Thunderstorm Wind in CLAY, FLORIDA
From 26-JUN-17 16:30:00 to 26-JUN-17 16:30:00 (EST-5)
Location: DOCTORS LAKE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tree was blown down across Blanding Blvd near Constitution Ave. Traffic was stopped until the tree was cleared.

Lightning in DUVAL, FLORIDA
From 26-JUN-17 16:52:00 to 26-JUN-17 16:52:00 (EST-5)
Location: EAST MANDARIN
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A home chimney was struck by lightning, but no fire occurred. The cost of damage was unknown, but it was estimated for Storm Data.

Thunderstorm Wind in ST. JOHNS, FLORIDA
From 26-JUN-17 16:37:00 to 26-JUN-17 16:37:00 (EST-5)
Location: ORANGEDALE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree was blown down near State Road 13 and State Road 16A. The time of damage was based on radar.

Flood in DUVAL, FLORIDA
From 26-JUN-17 16:26:00 to 26-JUN-17 16:26:00 (EST-5)
Location: OAKWOOD VILLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Glynlea Road at Oglethorpe Road was flooded. Water was up to the door of a home.