Alert archive / Florida / Special Weather Statements in 2019

Special Weather Statement, NWS Melbourne, FL

December 17, 2019Lake County, Florida

NWS Melbourne, FL issued this special weather statement at Dec 17, 2019, 2:49 PM EST for Lake County, Florida. It was in force for 41 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
Dec 17, 2019, 2:49 PM EST (19:49 UTC)
Expired
Dec 17, 2019, 3:30 PM EST
In force
41 min
Issued by
NWS Melbourne, FL

County Lake County, FL

The radar

The Melbourne radar (KMLB), 112 km from the middle of the area, began a volume at 19:49 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, 7.8 hours before the alert went out and 204 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, Jacksonville, FL at 12:00Z on 2019-12-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 845 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, Jacksonville, FL at 12:00Z on 2019-12-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 193 square meters per square second.19395878Sfc1 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
845 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
606 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
193 m²/s²
0-3 km storm-relative helicity
197 m²/s²
Significant tornado parameter
0.9
Supercell composite
6.4

Open this sounding in Storm Lab

The text

As transmitted.

<!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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 Melbourne, FL wrote its last area forecast discussion before this special weather statement went out at Dec 17, 9:23 AM EST, 5 hours 26 minutes earlier.

Area forecast discussion, Dec 17, 9:23 AM EST, 5 hours 26 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Dec 17, 9:40 AM EST, 5 hours 9 minutes before
Hazardous Weather Outlook
National Weather Service Melbourne FL
940 AM EST Tue Dec 17 2019

AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141-
144-147-180300-
Flagler Beach to Volusia-Brevard County Line 0-20 nm-Volusia-
Brevard County Line to Sebastian Inlet 0-20 nm-
Sebastian Inlet to Jupiter Inlet 0-20 nm-Flagler Beach to Volusia-
Brevard County Line 20-60 nm-Volusia-
Brevard County Line to Sebastian Inlet 20-60 nm-
Sebastian Inlet to Jupiter Inlet 20-60 nm-Inland Volusia-
Northern Lake-Orange-Seminole-Southern Brevard-Osceola-
Indian River-Okeechobee-St. Lucie-Martin-Coastal Volusia-
Southern Lake-Northern Brevard-
940 AM EST Tue Dec 17 2019

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

.THUNDERSTORM IMPACT...
Scattered lightning storms are expected to develop during the mid
to late afternoon over interior counties ahead of a cold front.
The storms will move quickly toward the northeast around 35 mph
and will increase in coverage into the evening as the front nears.
Cold temperatures aloft and increasing wind fields should produce
a few strong storms with gusty winds. One or two storms may
produce damaging winds near 60 mph and small hail. An isolated
tornado also cannot be ruled out.

.FLOOD IMPACT...
Locally heavy rains of one to two inches will be possible with
storms late this afternoon through this evening. This may cause
temporary flooding of some roads especially where previous heavy
rains fell last week.

.RIP CURRENT IMPACT...
Easterly swell will continue to impact the surf zone and produce a
Moderate Risk of rip currents at the beaches of east central
Florida. Always swim within sight of a lifeguard.

.MARINE THUNDERSTORM GUST IMPACT...
Scattered showers and lightning storms will develop during the mid
to late afternoon and move quickly toward the northeast around 30
mph across inland lakes and eventually across the intracoastal
and nearshore Atlantic waters into this evening. A few strong
storms will produce wind gusts greater than 35 knots along with
dangerous lightning strikes.

.WIND AND SEA IMPACT...
Small craft should exercise caution for south to southeast winds
15 to 20 knots over the open Atlantic. Seas up to 6 feet well
offshore. North winds behind a cold front will increase 20 to 25
knots late tonight over the Atlantic coastal waters of Volusia
county.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
Boating and surf zone conditions will deteriorate rapidly on
Wednesday, including on the intracoastal waters as North winds 20
to 25 knots overspread the waters. Seas will build 7 to 8 feet
nearshore and 9 to 11 feet in the Gulf Stream Wednesday and
Wednesday night with only slow improvement through late week.

Low pressure is forecast to develop in the Gulf of Mexico this
weekend and move across the Florida peninsula. This will bring a
threat for additional heavy rains as well as a potential for
severe weather. It is too early to know timing and impact details
but residents and visitors of east central Florida should stay
tuned to later forecasts for this weekend.

.SPOTTER INFORMATION STATEMENT...
Spotters are requested to monitor the weather and self activate
if needed.

Combs/Kelly

In the hours before

Special weather statement, Dec 17, 2:49 PM EST, 0 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 4:14 AM ESTSmall Craft AdvisoryMLB7 days
Dec 17, 2:56 PM ESTSevere Thunderstorm WarningMLBLake, Orange, Seminole34 min
Dec 17, 3:31 PM ESTSpecial Weather StatementMLBSeminole59 min
Dec 17, 3:47 PM ESTSevere Thunderstorm WarningMLBOrange, Seminole43 min
Dec 17, 3:52 PM ESTSpecial Weather StatementMLBVolusia53 min
Dec 17, 3:57 PM ESTSpecial Marine WarningMLB3 hr
Dec 17, 4:38 PM ESTSpecial Weather StatementMLBSeminole52 min
Dec 17, 6:11 PM ESTSpecial Weather StatementMLBLake49 min
Dec 17, 6:36 PM ESTSpecial Weather StatementMLBLake54 min

Nearby

Special Weather Statements in Florida, 2019Every special weather statement in 2019

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.