Alert archive / Florida / Flash Flood Watches in 2014

Flash Flood Watch 1, NWS Jacksonville, FL

September 6, 20146 counties in Florida

NWS Jacksonville, FL issued this flash flood watch at Sep 6, 2014, 9:08 AM EDT for 6 counties in Florida. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Sep 6, 2014, 9:08 AM EDT (13:08 UTC)
Expired: Sep 6, 2014, 2:07 PM EDT
In force: 5 hr
Issued by: NWS Jacksonville, FL
Flood severity: None

Counties Baker County, FL, Bradford County, FL, Gilchrist County, FL, Nassau County, FL, Suwannee County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 77 km from the middle of the area, began a volume at 13:08 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, 1.1 hours before the alert went out and 185 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: 610 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 11 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 Sep 6, 8:19 AM EDT, 49 minutes earlier.

Area forecast discussion, Sep 6, 8:19 AM EDT, 49 minutes before

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Hazardous weather outlook, Sep 6, 5:28 AM EDT, 3 hours 40 minutes before

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In the hours before

Local storm report, Sep 6, 6:09 AM EDT, 2 hours 59 minutes before

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Local storm report, Sep 6, 7:12 AM EDT, 1 hour 56 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
Sep 6, 4:23 AM EDT	Areal Flood Advisory	JAX	Columbia, Hamilton	82 min
Sep 6, 4:54 AM EDT	Areal Flood Advisory	JAX	Columbia	2 hr
Sep 6, 5:42 AM EDT	Areal Flood Warning	JAX	Columbia	2 hr
Sep 6, 6:28 AM EDT	Flash Flood Warning	JAX	Columbia, Suwannee	3 hr
Sep 6, 6:39 AM EDT	Areal Flood Advisory	JAX	Baker, Columbia, Union	2 hr
Sep 6, 6:44 AM EDT	Areal Flood Advisory	JAX	Alachua, Columbia, Gilchrist, Union	2 hr
Sep 6, 7:17 AM EDT	Areal Flood Advisory	JAX	Suwannee	118 min
Sep 6, 7:27 AM EDT	Areal Flood Advisory	JAX	Columbia, Hamilton, Suwannee	2 hr
Sep 6, 8:32 AM EDT	Areal Flood Warning	JAX	Suwannee	118 min
Sep 6, 8:46 AM EDT	Areal Flood Advisory	JAX	Baker, Columbia, Nassau, Union	119 min
Sep 6, 9:30 AM EDT	Areal Flood Warning	JAX	Alachua, Columbia, Hamilton, Suwannee, Union	2 hr
Sep 6, 7:16 PM EDT	Areal Flood Advisory	JAX	Flagler	119 min
Sep 6, 4:55 AM EDT	Areal Flood Advisory	JAX	Clinch, Echols	2 hr
Sep 6, 2:05 PM EDT	Areal Flood Advisory	JAX	Camden	115 min
Sep 6, 6:35 PM EDT	Areal Flood Advisory	JAX	Clinch	115 min
Sep 6, 7:07 PM EDT	Areal Flood Warning	JAX	Clinch	113 min

Nearby

Flash Flood Watches in Florida, 2014 Every flash flood watch in 2014

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.