Storm Events Database

Event Details

Event Tornado
-- Scale EF0
-- Length 0.91 Miles
-- Width 200 Yards
State FLORIDA
County/Area ST. JOHNS
WFO JAX
Report Source NWS Storm Survey
NCDC Data Source CSV
Begin Date 2013-05-04 20:14:00.0 EST-5
End Date 2013-05-04 20:16:00.0 EST-5
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 500.00K
Crop Damage 0.00K
Episode Narrative A series of weak surface low pressure systems draped across the the deep south including the central Florida peninsula combined with an approaching cold front over a very saturated airmass triggered a cluster of storms over Nassau county that produced a strong outflow that tracked SE over western Duval county. When this outflowed encountered ESE flow and feeder bands moving inland from the Atlantic, the cell became nearly stationary over southern Duval and NE Clay counties where it produced flash flooding during the evening. The cell pulsed up and became severe over northern St. Johns county where low level helicity was greatly increased from the strong 20 kt surface winds from the ESE on the north side of a meso low that lifted northward over Alachua and Putnam counties. The cell began to strong very strong and deep layer rotation over northern St. Johns county, and a tornado warning was issued. The cell then collapsed within the next few radar scans, but weak rotation was still present. When a very strong downburst raced southward over St. Johns county, the downburst produced widespread damage to farmland near Elkton and a weak EF1 tornado touched down, on the bookend of the downburst. Flooding rainfall and deep hail drifts of penny size hail caused extensive damage to cropland near Elkton, with severe financial impact to farmers in the area.
Event Narrative A barn was severely damaged at Jen-Sar Farms and Produce store. A large barn was destroyed with noticeable debris lofted into nearby structures. A large tree was snapped at its base and fell on a mobile home causing significant damage by splitting the unit in two. Multiple trees were uprooted and fell on a boat near Elkton. The cost of damage was estimated, and is likely underestimated.


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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 554.00K 38.250M
DUVAL CO. DUVAL CO. FL 05/04/2013 11:00 EST-5 Flood 0 0 1.00K 0.00K
DUVAL (ZONE) DUVAL (ZONE) FL 05/04/2013 15:40 EST-5 Coastal Flood 0 0 0.00K 0.00K
DUVAL CO. DUVAL CO. FL 05/04/2013 18:55 EST-5 Flood 0 0 3.00K 0.00K
DUVAL CO. DUVAL CO. FL 05/04/2013 19:00 EST-5 Flash Flood 0 0 50.00K 0.00K
ST. JOHNS CO. ST. JOHNS CO. FL 05/04/2013 19:25 EST-5 Thunderstorm Wind 50 kts. EG 0 0 0.00K 0.00K
ST. JOHNS CO. ST. JOHNS CO. FL 05/04/2013 19:39 EST-5 Hail 0.75 in. 0 0 0.00K 0.00K
ST. JOHNS CO. ST. JOHNS CO. FL 05/04/2013 19:50 EST-5 Thunderstorm Wind 50 kts. EG 0 0 0.00K 0.00K
ST. JOHNS CO. ST. JOHNS CO. FL 05/04/2013 20:14 EST-5 Tornado EF0 0 0 500.00K 0.00K
ST. JOHNS CO. ST. JOHNS CO. FL 05/04/2013 20:15 EST-5 Flood 0 0 0.00K 38.250M
ST. JOHNS CO. ST. JOHNS CO. FL 05/04/2013 20:20 EST-5 Thunderstorm Wind 50 kts. EG 0 0 0.00K 0.00K
ST. JOHNS CO. ST. JOHNS CO. FL 05/04/2013 20:40 EST-5 Thunderstorm Wind 50 kts. EG 0 0 0.00K 0.00K
ST. JOHNS CO. ST. JOHNS CO. FL 05/04/2013 20:50 EST-5 Hail 0.75 in. 0 0 0.00K 0.00K
Totals: 0 0 554.00K 38.250M