Alert archive / Florida / Special Weather Statements in 2018

Special Weather Statement, NWS Jacksonville, FL

November 26, 2018Duval County, Florida

NWS Jacksonville, FL issued this special weather statement at Nov 26, 2018, 9:21 AM EST for Duval County, Florida. It was in force for 39 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
Nov 26, 2018, 9:21 AM EST (14:21 UTC)
Expired
Nov 26, 2018, 10:00 AM EST
In force
39 min
Issued by
NWS Jacksonville, FL

County Duval County, FL

The radar

The Jacksonville radar (KJAX), 26 km from the middle of the area, began a volume at 14:23 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, 2.4 hours before the alert went out and 230 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 12:00Z on 2018-11-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 620 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2018-11-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
620 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
615 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.5

Open this sounding in Storm Lab

The text

As transmitted.

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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.

NWS Jacksonville, FL wrote its last area forecast discussion before this special weather statement went out at Nov 25, 3:07 PM EST, 18 hours 14 minutes earlier.

Area forecast discussion, Nov 25, 3:07 PM EST, 18 hours 14 minutes before
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<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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The office that day

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

IssuedProductOfficeCountiesLasted
Nov 26, 7:12 AM ESTSpecial Weather StatementJAXHamilton, Suwannee48 min
Nov 26, 8:57 AM ESTSpecial Weather StatementJAXNassau33 min
Nov 26, 9:53 AM ESTSpecial Weather StatementJAXAlachua37 min
Nov 26, 10:12 AM ESTSpecial Weather StatementJAXDuval48 min
Nov 26, 10:13 AM ESTSpecial Marine WarningJAX92 min
Nov 26, 10:41 AM ESTSpecial Weather StatementJAXColumbia, Suwannee34 min
Nov 26, 11:17 AM ESTSpecial Weather StatementJAXBaker, Columbia43 min
Nov 26, 11:38 AM ESTSpecial Marine WarningJAX37 min
Nov 26, 12:08 PM ESTSpecial Weather StatementJAXPutnam37 min
Nov 26, 12:34 PM ESTSpecial Weather StatementJAXPutnam41 min
Nov 26, 12:44 PM ESTSpecial Weather StatementJAXBaker, Columbia, Union46 min
Nov 26, 12:56 PM ESTSevere Thunderstorm WarningJAXSaint Johns21 min
Nov 26, 12:59 PM ESTSpecial Marine WarningJAX57 min
Nov 26, 1:14 PM ESTSpecial Weather StatementJAXPutnam46 min
Nov 26, 1:23 PM ESTSpecial Weather StatementJAXNassau52 min
Nov 26, 2:13 PM ESTSpecial Marine WarningJAX47 min
Nov 26, 3:31 PM ESTCoastal Flood StatementJAXDuval, Flagler89 min
Nov 26, 3:32 PM ESTFreeze WatchJAXBaker, Gilchrist, Suwannee, Union11 hr
Nov 26, 6:55 AM ESTSpecial Weather StatementJAXBrantley, Glynn50 min
Nov 26, 8:13 AM ESTSpecial Weather StatementJAXGlynn47 min

Nearby

Special Weather Statements in Florida, 2018Every special weather statement in 2018

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.