Alert archive / Florida / Flash Flood Watches in 2020

Flash Flood Watch 4, NWS Jacksonville, FL

June 7, 2020Duval County, Florida

NWS Jacksonville, FL issued this flash flood watch at Jun 7, 2020, 5:09 PM EDT for Duval County, Florida. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jun 7, 2020, 5:09 PM EDT (21:09 UTC)
Expired: Jun 7, 2020, 11:21 PM EDT
In force: 6 hr
Issued by: NWS Jacksonville, FL
Flood severity: None

County Duval County, FL

The radar

The Jacksonville radar (KJAX), 17 km from the middle of the area, began a volume at 21:11 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, 9.2 hours before the alert went out and 255 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: 13 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 795 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 306 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 flash flood watch 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 flash flood watch went out at Jun 7, 4:41 PM EDT, 28 minutes earlier.

Area forecast discussion, Jun 7, 4:41 PM EDT, 28 minutes before

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In the hours before

Local storm report, Jun 7, 3:52 PM EDT, 1 hour 17 minutes before

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Special weather statement, Jun 7, 3:53 PM EDT, 1 hour 16 minutes before

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Special weather statement, Jun 7, 4:20 PM EDT, 49 minutes before

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Special weather statement, Jun 7, 4:35 PM EDT, 34 minutes before

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Local storm report, Jun 7, 4:53 PM EDT, 16 minutes before

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Local storm report, Jun 7, 5:05 PM EDT, 4 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
Jun 6, 8:35 PM EDT	Special Weather Statement	JAX	Flagler, Putnam	40 min
Jun 6, 9:04 PM EDT	Severe Thunderstorm Warning	JAX	Saint Johns	41 min
Jun 6, 9:11 PM EDT	Areal Flood Warning	JAX	Clay, Putnam	3 hr
Jun 6, 9:16 PM EDT	Severe Thunderstorm Warning	JAX	Flagler, Saint Johns	44 min
Jun 6, 9:28 PM EDT	Special Marine Warning	JAX		92 min
Jun 6, 9:48 PM EDT	Special Weather Statement	JAX	Flagler	42 min
Jun 6, 10:03 PM EDT	Special Weather Statement	JAX	Saint Johns	42 min
Jun 6, 10:57 PM EDT	Special Marine Warning	JAX		63 min
Jun 6, 11:59 PM EDT	Special Marine Warning	JAX		46 min
Jun 7, 4:24 AM EDT	Special Weather Statement	JAX	Hamilton, Suwannee	111 min
Jun 7, 4:46 AM EDT	Special Weather Statement	JAX	Alachua	44 min
Jun 7, 5:30 AM EDT	Special Weather Statement	JAX	Alachua	45 min
Jun 7, 6:11 AM EDT	Special Weather Statement	JAX	Bradford	34 min
Jun 7, 6:46 AM EDT	Special Weather Statement	JAX	Clay	44 min
Jun 7, 7:21 AM EDT	Special Weather Statement	JAX	Bradford	24 min
Jun 7, 7:35 AM EDT	Special Weather Statement	JAX	Duval	40 min
Jun 7, 8:06 AM EDT	Areal Flood Warning	JAX	Bradford, Clay, Duval	3 hr
Jun 7, 8:17 AM EDT	Special Weather Statement	JAX	Duval	58 min
Jun 7, 8:26 AM EDT	Flash Flood Warning Considerable damage threat	JAX	Duval	79 min
Jun 7, 9:12 AM EDT	Special Weather Statement	JAX	Duval	48 min
Jun 7, 9:17 AM EDT	Special Marine Warning	JAX		88 min
Jun 7, 9:45 AM EDT	Areal Flood Warning	JAX	Columbia, Hamilton, Suwannee	2 hr
Jun 7, 9:54 AM EDT	Areal Flood Warning	JAX	Duval, Saint Johns	96 min
Jun 7, 11:24 AM EDT	Areal Flood Warning	JAX	Baker, Columbia, Hamilton, Suwannee, Union	3 hr
Jun 7, 11:40 AM EDT	Flash Flood Warning	JAX	Hamilton, Suwannee	4 hr
Jun 7, 12:05 PM EDT	Special Weather Statement	JAX	Clay	25 min
Jun 7, 12:16 PM EDT	Areal Flood Warning	JAX	Baker, Clay, Duval, Nassau	3 hr
Jun 7, 12:21 PM EDT	Special Weather Statement	JAX	Duval	24 min
Jun 7, 12:32 PM EDT	Special Weather Statement	JAX	Columbia	28 min
Jun 7, 12:40 PM EDT	Special Weather Statement	JAX	Clay	50 min
Jun 7, 12:51 PM EDT	Special Weather Statement	JAX	Duval	24 min
Jun 7, 1:07 PM EDT	Special Weather Statement	JAX	Clay	23 min
Jun 7, 1:11 PM EDT	Special Weather Statement	JAX	Suwannee	34 min
Jun 7, 1:15 PM EDT	Special Weather Statement	JAX	Suwannee	45 min
Jun 7, 1:49 PM EDT	Special Marine Warning	JAX		56 min
Jun 7, 1:50 PM EDT	Special Weather Statement	JAX	Duval	25 min
Jun 7, 1:52 PM EDT	Special Marine Warning	JAX		53 min
Jun 7, 1:54 PM EDT	Special Weather Statement	JAX	Suwannee	36 min
Jun 7, 2:25 PM EDT	Areal Flood Warning	JAX	Baker, Columbia, Hamilton, Suwannee	3 hr
Jun 7, 2:32 PM EDT	Special Marine Warning	JAX		88 min
Jun 7, 2:39 PM EDT	Special Weather Statement	JAX	Saint Johns	36 min
Jun 7, 2:43 PM EDT	Special Weather Statement	JAX	Suwannee	62 min
Jun 7, 2:49 PM EDT	River Flood Warning	JAX	Clay	42 hr
Jun 7, 3:05 PM EDT	Flash Flood Warning	JAX	Hamilton, Suwannee	3 hr
Jun 7, 3:12 PM EDT	Special Weather Statement	JAX	Marion	48 min
Jun 7, 3:15 PM EDT	Tornado Warning	JAX	Columbia	45 min
Jun 7, 3:41 PM EDT	Tornado Warning	JAX	Marion	34 min
Jun 7, 3:44 PM EDT	Special Weather Statement	JAX	Baker	46 min
Jun 7, 3:46 PM EDT	Special Weather Statement	JAX	Suwannee	44 min
Jun 7, 3:53 PM EDT	Special Weather Statement	JAX	Union	37 min
Jun 7, 3:55 PM EDT	Tornado Warning	JAX	Columbia	35 min
Jun 7, 4:04 PM EDT	Tornado Warning	JAX	Alachua, Baker, Bradford, Union	41 min
Jun 7, 4:20 PM EDT	Special Weather Statement	JAX	Alachua, Gilchrist, Marion, Putnam	55 min
Jun 7, 4:35 PM EDT	Special Weather Statement	JAX	Hamilton, Suwannee	40 min
Jun 7, 4:42 PM EDT	Tornado Warning	JAX	Baker, Bradford, Union	33 min
Jun 7, 5:13 PM EDT	Special Weather Statement	JAX	Flagler	47 min
Jun 7, 5:31 PM EDT	Special Weather Statement	JAX	Marion	44 min
Jun 7, 5:58 PM EDT	Flash Flood Warning	JAX	Columbia, Hamilton, Suwannee	4 hr
Jun 7, 6:15 PM EDT	Special Weather Statement	JAX	Marion	45 min
Jun 7, 6:32 PM EDT	Special Weather Statement	JAX	Flagler	28 min
Jun 7, 6:46 PM EDT	Special Weather Statement	JAX	Marion	44 min
Jun 7, 7:16 PM EDT	Special Weather Statement	JAX	Alachua, Bradford	59 min
Jun 7, 11:53 AM EDT	Flash Flood Warning	JAX	Echols	3 hr

Nearby

Flash Flood Watches in Florida, 2020 Every flash flood watch in 2020

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.