Alert archive / Florida / Special Weather Statements in 2015

Special Weather Statement, NWS Jacksonville, FL

April 20, 2015Flagler County, Marion County, Putnam County, Florida

NWS Jacksonville, FL issued this special weather statement at Apr 20, 2015, 3:21 PM EDT for Flagler County, Marion County, Putnam County, Florida. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 20, 2015, 3:21 PM EDT (19:21 UTC)
Expired: Apr 20, 2015, 4:15 PM EDT
In force: 54 min
Issued by: NWS Jacksonville, FL

Counties Flagler County, FL, Marion County, FL, Putnam County, FL

The radar

The Jacksonville radar (KJAX), 123 km from the middle of the area, began a volume at 19:20 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, 7.4 hours before the alert went out and 125 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: 204 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 973 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

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

Hazardous weather outlook, Apr 19, 5:52 PM EDT, 21 hours 29 minutes before

<!doctype html>
<html lang="en">
<head>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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    </section>
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</body>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 11:37 AM EDT	Special Weather Statement	JAX	Hamilton, Suwannee	53 min
Apr 20, 12:33 PM EDT	Special Weather Statement	JAX	Columbia	42 min
Apr 20, 1:11 PM EDT	Special Weather Statement	JAX	Suwannee	49 min
Apr 20, 1:17 PM EDT	Special Weather Statement	JAX	Baker, Columbia, Union	43 min
Apr 20, 2:13 PM EDT	Special Weather Statement	JAX	Alachua	32 min
Apr 20, 2:22 PM EDT	Special Weather Statement	JAX	Nassau	23 min
Apr 20, 2:33 PM EDT	Special Weather Statement	JAX	Duval	42 min
Apr 20, 2:45 PM EDT	Special Weather Statement	JAX	Putnam	45 min
Apr 20, 2:51 PM EDT	Special Marine Warning	JAX		114 min
Apr 20, 3:06 PM EDT	Special Weather Statement	JAX	Marion	24 min
Apr 20, 3:24 PM EDT	Severe Thunderstorm Warning	JAX	Putnam	36 min
Apr 20, 3:31 PM EDT	Severe Thunderstorm Warning	JAX	Marion	44 min
Apr 20, 3:43 PM EDT	Severe Thunderstorm Warning	JAX	Flagler, Saint Johns	62 min
Apr 20, 4:43 PM EDT	Special Marine Warning	JAX		62 min

Nearby

Special Weather Statements in Florida, 2015 Every special weather statement in 2015

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.