Alert archive / Florida / Areal Flood Warnings in 2021

Areal Flood Warning 30, NWS Jacksonville, FL

July 7, 202110 counties in Florida; 4 counties in Georgia

NWS Jacksonville, FL issued this areal flood warning at Jul 7, 2021, 1:38 PM EDT for 10 counties in Florida; 4 counties in Georgia. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 7, 2021, 1:38 PM EDT (17:38 UTC)
Expired: Jul 7, 2021, 4:45 PM EDT
In force: 3 hr
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Flood severity: None

Counties Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Hamilton County, FL, Marion County, FL, Putnam County, FL, Union County, FL, Charlton County, GA, Clinch County, GA, Echols County, GA, Ware County, GA

The radar

The Jacksonville radar (KJAX), 64 km from the middle of the area, began a volume at 17:37 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

Jacksonville, FL (KJAX), launched 12:00Z, 5.6 hours before the alert went out and 65 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: 1540 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jacksonville, FL wrote its last area forecast discussion before this areal flood warning went out at Jul 7, 9:06 AM EDT, 4 hours 32 minutes earlier.

Area forecast discussion, Jul 7, 9:06 AM EDT, 4 hours 32 minutes before

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In the hours before

Special weather statement, Jul 7, 10:19 AM EDT, 3 hours 19 minutes before

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Local storm report, Jul 7, 10:30 AM EDT, 3 hours 8 minutes before

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Special weather statement, Jul 7, 10:55 AM EDT, 2 hours 43 minutes before

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Local storm report, Jul 7, 11:41 AM EDT, 1 hour 57 minutes before

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Special weather statement, Jul 7, 12:09 PM EDT, 1 hour 29 minutes before

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Local storm report, Jul 7, 12:54 PM EDT, 44 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 9:53 PM EDT	River Flood Warning	JAX	Alachua, Columbia	13 days
Jul 6, 9:54 PM EDT	River Flood Warning	JAX	Columbia, Hamilton, Suwannee	48 hr
Jul 6, 9:54 PM EDT	River Flood Warning	JAX	Hamilton, Suwannee	71 hr
Jul 6, 11:03 PM EDT	Rip Current Statement	JAX	Duval, Flagler, Nassau	28 hr
Jul 7, 4:02 AM EDT	Tornado Warning	JAX	Alachua, Marion	28 min
Jul 7, 4:29 AM EDT	Tornado Warning	JAX	Alachua, Marion	31 min
Jul 7, 4:33 AM EDT	Tornado Warning	JAX	Marion	27 min
Jul 7, 5:05 AM EDT	Special Weather Statement	JAX	Alachua, Marion	40 min
Jul 7, 5:41 AM EDT	Special Weather Statement	JAX	Alachua, Gilchrist	49 min
Jul 7, 6:02 AM EDT	Tornado Warning	JAX	Alachua, Bradford, Union	28 min
Jul 7, 6:33 AM EDT	Special Weather Statement	JAX	Alachua, Suwannee, Union	57 min
Jul 7, 6:40 AM EDT	Tornado Warning	JAX	Alachua, Columbia, Union	35 min
Jul 7, 7:02 AM EDT	Tornado Warning	JAX	Columbia, Suwannee	28 min
Jul 7, 7:23 AM EDT	Special Weather Statement	JAX	Baker, Bradford, Clay, Columbia, Hamilton, Union	67 min
Jul 7, 8:31 AM EDT	Special Weather Statement	JAX	Baker, Hamilton	44 min
Jul 7, 8:39 AM EDT	Tornado Warning	JAX	Baker, Columbia	11 min
Jul 7, 9:59 AM EDT	Special Weather Statement	JAX	Nassau	46 min
Jul 7, 12:00 PM EDT	Areal Flood Warning	JAX	Alachua, Bradford, Columbia, Gilchrist, Hamilton, Suwannee and 1 more	3 hr
Jul 7, 2:45 PM EDT	Special Weather Statement	JAX	Flagler, Saint Johns	60 min
Jul 7, 2:47 PM EDT	Special Weather Statement	JAX	Baker, Clay, Duval, Nassau	58 min
Jul 7, 2:49 PM EDT	Areal Flood Warning	JAX	Hamilton, Suwannee	116 min
Jul 7, 2:54 PM EDT	Areal Flood Warning	JAX	Alachua, Bradford	111 min
Jul 7, 3:24 PM EDT	River Flood Warning	JAX	Columbia, Gilchrist, Suwannee	93 days
Jul 7, 3:31 PM EDT	Areal Flood Warning	JAX	Baker, Clay, Duval, Nassau	2 hr
Jul 7, 3:45 PM EDT	Special Weather Statement	JAX	Clay, Duval, Nassau, Saint Johns	60 min
Jul 7, 4:32 PM EDT	Tornado Warning	JAX	Duval, Saint Johns	28 min
Jul 7, 4:45 PM EDT	Special Weather Statement	JAX	Duval, Nassau	60 min
Jul 7, 4:54 PM EDT	Tornado Warning Tornado observed	JAX	Duval, Nassau	36 min
Jul 7, 5:15 PM EDT	Areal Flood Warning	JAX	Duval, Nassau, Saint Johns	2 hr
Jul 7, 6:42 PM EDT	Special Marine Warning	JAX		93 min
Jul 7, 7:18 PM EDT	Areal Flood Warning	JAX	Nassau	117 min
Jul 7, 2:52 AM EDT	High Surf Advisory	JAX	Camden, Glynn	13 hr
Jul 7, 9:01 AM EDT	Special Weather Statement	JAX	Atkinson	44 min
Jul 7, 9:17 AM EDT	Special Weather Statement	JAX	Echols	58 min
Jul 7, 9:37 AM EDT	Tornado Warning	JAX	Brantley, Pierce, Ware	23 min
Jul 7, 10:03 AM EDT	Special Weather Statement	JAX	Coffee	42 min
Jul 7, 10:14 AM EDT	Special Weather Statement	JAX	Clinch	46 min
Jul 7, 10:19 AM EDT	Special Weather Statement	JAX	Camden	41 min
Jul 7, 10:55 AM EDT	Special Weather Statement	JAX	Atkinson, Bacon, Brantley, Coffee, Pierce	65 min
Jul 7, 12:09 PM EDT	Special Weather Statement	JAX	Appling, Jeff Davis	36 min
Jul 7, 5:42 PM EDT	Tornado Warning	JAX	Camden	33 min
Jul 7, 5:45 PM EDT	Special Weather Statement	JAX	Brantley, Camden, Glynn, Wayne	60 min
Jul 7, 6:11 PM EDT	Tornado Warning Tornado observed	JAX	Camden, Glynn, Wayne	21 min
Jul 7, 6:17 PM EDT	Areal Flood Warning	JAX	Appling, Brantley, Camden, Glynn, Pierce, Wayne	3 hr
Jul 7, 6:46 PM EDT	Special Weather Statement	JAX	Camden, Glynn, Wayne	44 min
Jul 7, 7:01 PM EDT	Flash Flood Warning	JAX	Camden, Glynn	119 min
Jul 7, 7:53 PM EDT	Flash Flood Warning	JAX	Glynn	78 min

Nearby

Areal Flood Warnings in Florida, 2021 Areal Flood Warnings in Georgia, 2021 Every areal flood warning in 2021

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.