Flash Flood — Hamilton, Florida

2020-06-07 · near Jasper, Hamilton, Florida

Event narrative

FDEM reported that the Hamilton EOC was flooded. Computers, furniture and records on the main floor were damaged. The road department reported that there was $30-$35K of repairs to roadways needed. The cost of damage for the EOC was unknown.

Wider weather episode

Deep tropical moisture was in place (PWAT 2.5) with the area on the east side of TS

Cristobal as the storm approached the LA Gulf Coast. Waves of moderate to heavy rainfall with isolated embedded thunderstorms pivoted northward across the local forecast area into the evening with a more solid band of moderate to heavy rainfall developing across north Florida as low level convergence increased between a lifting frontal zones across south-central FL and a persistent low level ridge axis holding firm just north of the Altamaha River basin. This ridge will limit the northward extend/expansion of the convective band into Sun, and generally focused a W-E oriented swath of heavy rainfall generally near and south of the I-10 corridor overnight into Sunday morning on 6/7. The ridge strengthened north of the Altamaha Region Sun afternoon 6/7, which shunt the corridor of heavy rain SSW toward the I-75 corridor of NE FL with drier mid level air (700-500 mb) decreasing rain chances across SE GA and eastern NE FL into Sun evening. In addition to heavy rainfall potential, there was a low tornado threat for NE FL into the evening of 6/6 with elevated 0-1 km shear values 20-25 kts with low level ESE winds under increasing SSW winds out of the GOMEX, with speeds increasing to 35-45 kts at 850 mb through 06z Sun 6/7.

View location on OpenStreetMap → (30.5226, -82.9551)

Source: NOAA Storm Events Database, event_id 894217. Narrative written by the NWS forecast office that issued the report.