Alert archive / Florida / Flash Flood Warnings in 2023

Flash Flood Warning 12, NWS Jacksonville, FL

September 1, 2023Alachua County, Florida

NWS Jacksonville, FL issued this flash flood warning at Sep 1, 2023, 3:07 PM EDT for Alachua County, Florida. It was in force for 83 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 1, 2023, 3:07 PM EDT (19:07 UTC)
Expired: Sep 1, 2023, 4:30 PM EDT
In force: 83 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Flood severity: None

County Alachua County, FL

The radar

The Jacksonville radar (KJAX), 110 km from the middle of the area, began a volume at 19:09 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.1 hours before the alert went out and 204 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1658 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 489 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 31, 11:45 PM EDT	Areal Flood Advisory	JAX	Columbia, Hamilton	2 hr
Sep 1, 3:27 AM EDT	Coastal Flood Advisory	JAX	Duval, Flagler, Nassau	23 hr
Sep 1, 3:27 AM EDT	Rip Current Statement	JAX	Duval, Flagler, Nassau	5 days
Sep 1, 8:15 AM EDT	Areal Flood Advisory	JAX	Baker	2 hr
Sep 1, 10:41 AM EDT	Areal Flood Advisory	JAX	Baker, Columbia	2 hr
Sep 1, 11:11 AM EDT	Areal Flood Warning	JAX	Baker	2 hr
Sep 1, 11:57 AM EDT	Flood Watch	JAX	Alachua, Baker, Bradford, Gilchrist, Marion, Suwannee and 1 more	8 hr
Sep 1, 2:11 PM EDT	Areal Flood Advisory	JAX	Alachua	2 hr
Sep 1, 2:29 PM EDT	Areal Flood Warning	JAX	Alachua	2 hr
Sep 1, 2:34 PM EDT	Areal Flood Advisory	JAX	Marion	45 min
Sep 1, 2:45 PM EDT	Areal Flood Warning	JAX	Marion	33 min
Sep 1, 2:51 PM EDT	Areal Flood Advisory	JAX	Marion	57 min
Sep 1, 3:15 PM EDT	Areal Flood Warning	JAX	Marion	34 min
Sep 1, 3:23 PM EDT	Areal Flood Warning	JAX	Marion	42 min
Sep 1, 3:28 PM EDT	Areal Flood Advisory	JAX	Alachua, Marion	66 min
Sep 1, 3:32 PM EDT	Areal Flood Advisory	JAX	Gilchrist	63 min
Sep 1, 3:59 PM EDT	Areal Flood Advisory	JAX	Gilchrist, Suwannee	77 min
Sep 1, 4:28 PM EDT	Areal Flood Advisory	JAX	Suwannee	57 min
Sep 1, 5:57 PM EDT	Areal Flood Advisory	JAX	Suwannee	53 min
Aug 31, 8:15 PM EDT	Areal Flood Advisory	JAX	Clinch	60 min
Aug 31, 8:46 PM EDT	Areal Flood Advisory	JAX	Charlton, Clinch, Ware	74 min
Aug 31, 9:12 PM EDT	Special Weather Statement	JAX	Clinch	48 min
Aug 31, 9:37 PM EDT	Special Weather Statement	JAX	Atkinson	38 min
Aug 31, 9:47 PM EDT	Areal Flood Advisory	JAX	Clinch	58 min
Aug 31, 10:03 PM EDT	Special Weather Statement	JAX	Clinch	57 min
Aug 31, 10:11 PM EDT	Areal Flood Advisory	JAX	Echols	2 hr
Aug 31, 10:12 PM EDT	Areal Flood Advisory	JAX	Atkinson, Clinch, Ware	2 hr
Aug 31, 10:33 PM EDT	Special Weather Statement	JAX	Clinch	57 min
Aug 31, 10:39 PM EDT	Areal Flood Advisory	JAX	Clinch	2 hr
Sep 1, 6:32 AM EDT	Areal Flood Advisory	JAX	Bacon, Coffee, Pierce, Ware	118 min
Sep 1, 9:05 AM EDT	Areal Flood Advisory	JAX	Atkinson, Coffee	115 min

Nearby

Flash Flood Warnings in Florida, 2023 Every flash flood warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.