Very high atmospheric moisture content and weak steering flow due to an upper ridge over the local area favored locally heavy rainfall in sea breeze induced storms. Very hot and unstable conditions produced a few pulse severe storms with wet downbursts.

Hail in DUVAL, FLORIDA
From 28-MAY-19 15:12:00 to 28-MAY-19 15:12:00 (EST-5)
Location: ARLINGTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail was reported over the Arlington Expressway.

Flash Flood in DUVAL, FLORIDA
From 28-MAY-19 15:52:00 to 28-MAY-19 16:25:00 (EST-5)
Location: JACKSONVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management and broadcast media reported flash flooding in downtown Jacksonville. At 4:52 pm, the media relayed photos on social media of water pooling inside the parking garage of a local business. The time of this rainfall flooding was on radar. At 5:10 pm, emergency management reported flooding outside of the McCoys Creek basin in downtown Jacksonville. There was not structure flooding at the time, with radar estimates of 2-3 inches/hour in this area. At 5:20 pm, local media reported flooding over Stockton Street in downtown Jacksonville with a video of vehicles driving through 1-1.5 of flood water submerging car tires and wheel wells. At 5:25 pm, Jacksonville Fire Rescue was responding to flood water entering the Jacksonville Downtown Public Library. The Libaray was closed due to water in the building. At 5:25 pm, media relayed a social media report of fire rescue on scene at the intersection of Market and Orange Streets in Jacksonville due to flood waters. This location was within the Hogan's Creek River Basin which is susceptible to flash floods.

Heavy Rain in ALACHUA, FLORIDA
From 28-MAY-19 17:00:00 to 28-MAY-19 19:40:00 (EST-5)
Location: NEWBERRY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A Weather Underground site reported 2.94 inches of rainfall in 2 hrs and 40 minutes.

Heavy Rain in GILCHRIST, FLORIDA
From 28-MAY-19 17:00:00 to 28-MAY-19 20:00:00 (EST-5)
Location: TYLER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer measured 3.18 inches of rainfall in 3 hours.

Lightning in DUVAL, FLORIDA
From 28-MAY-19 15:16:00 to 28-MAY-19 15:16:00 (EST-5)
Location: JACKSONVILLE
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Lightning caused as structure fire at 2304 N Myrtle Avenue. The cost of damage was unknown but estimated for Storm Data.

Lightning in DUVAL, FLORIDA
From 28-MAY-19 15:34:00 to 28-MAY-19 15:34:00 (EST-5)
Location: YUKON
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning strikes caused a fire in a hangar at Naval Air Station Jacksonville. The cost of damage was unknown, but it was estimated for inclusion of the event in Storm Data.

Thunderstorm Wind in DUVAL, FLORIDA
From 28-MAY-19 15:30:00 to 28-MAY-19 15:30:00 (EST-5)
Location: SIMPSON YARD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A power line pole was blown down along Interstate 10, about 2 miles west of I-95.

Thunderstorm Wind in ST. JOHNS, FLORIDA
From 28-MAY-19 16:20:00 to 28-MAY-19 16:20:00 (EST-5)
Location: ARMSTRONG
Magnitude: 45.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down on a home. A trampoline was blown into a nearby field. The time of event was based on radar. The cost of damage was unknown but estimated for the inclusion of the event in Storm Data.

Thunderstorm Wind in BAKER, FLORIDA
From 28-MAY-19 17:30:00 to 28-MAY-19 17:30:00 (EST-5)
Location: SANDERSON
Magnitude: 45.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Baker County Law Enforcement Social Media showed a picture of a large tree blown down onto a home roof and a few other trees down at a residence on Abernathy Circle near County Road 127. The cost of damage was unknown but estimated for Storm Data.