Alert archive / Florida / Areal Flood Warnings in 2021

Areal Flood Warning 22, NWS Jacksonville, FL

June 25, 2021Duval County, Florida

NWS Jacksonville, FL issued this areal flood warning at Jun 25, 2021, 12:38 PM EDT for Duval County, Florida. 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: Jun 25, 2021, 12:38 PM EDT (16:38 UTC)
Expired: Jun 25, 2021, 3:45 PM EDT
In force: 3 hr
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
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 16:41 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, 4.6 hours before the alert went out and 19 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: 1255 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 700 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 34 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 Jun 25, 10:55 AM EDT, 1 hour 43 minutes earlier.

Area forecast discussion, Jun 25, 10:55 AM EDT, 1 hour 43 minutes before

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In the hours before

Special weather statement, Jun 25, 12:17 PM EDT, 21 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 25, 9:44 AM EDT	River Flood Warning	JAX	Columbia, Gilchrist	68 days
Jun 25, 10:07 AM EDT	Rip Current Statement	JAX	Duval, Flagler, Nassau	11 hr
Jun 25, 12:17 PM EDT	Special Weather Statement	JAX	Duval	58 min
Jun 25, 1:50 PM EDT	Special Weather Statement	JAX	Saint Johns	40 min
Jun 25, 2:20 PM EDT	Areal Flood Warning	JAX	Saint Johns	85 min
Jun 25, 2:58 PM EDT	Areal Flood Warning	JAX	Duval	92 min
Jun 25, 3:07 PM EDT	Special Weather Statement	JAX	Bradford	38 min
Jun 25, 3:09 PM EDT	Special Weather Statement	JAX	Columbia	66 min
Jun 25, 3:14 PM EDT	Special Weather Statement	JAX	Marion	61 min
Jun 25, 3:38 PM EDT	Special Weather Statement	JAX	Putnam	52 min
Jun 25, 3:49 PM EDT	Special Weather Statement	JAX	Bradford	56 min
Jun 25, 3:57 PM EDT	Areal Flood Warning	JAX	Bradford	93 min
Jun 25, 4:05 PM EDT	Special Weather Statement	JAX	Alachua	40 min
Jun 25, 4:26 PM EDT	Special Weather Statement	JAX	Marion	64 min
Jun 25, 4:53 PM EDT	Special Weather Statement	JAX	Gilchrist	67 min
Jun 25, 5:31 PM EDT	Special Weather Statement	JAX	Gilchrist	44 min
Jun 25, 6:08 PM EDT	Areal Flood Warning	JAX	Gilchrist	2 hr

Nearby

Areal Flood Warnings in Florida, 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.