Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Jacksonville, FL

August 4, 2017Atkinson County, Georgia

NWS Jacksonville, FL issued this special weather statement at Aug 4, 2017, 3:11 PM EDT for Atkinson County, Georgia. It was in force for 34 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
Aug 4, 2017, 3:11 PM EDT (19:11 UTC)
Expired
Aug 4, 2017, 3:45 PM EDT
In force
34 min
Issued by
NWS Jacksonville, FL

County Atkinson County, GA

The radar

The Moody AFB radar (KVAX), 48 km from the middle of the area, began a volume at 19:14 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, 7.2 hours before the alert went out and 151 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 2017-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 427 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 2017-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 square meters per square second.193958Sfc1 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
427 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
859 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.6

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 Jacksonville, FL wrote its last area forecast discussion before this special weather statement went out at Aug 4, 9:25 AM EDT, 5 hours 46 minutes earlier.

Area forecast discussion, Aug 4, 9:25 AM EDT, 5 hours 46 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, Aug 4, 3:21 AM EDT, 11 hours 50 minutes before
Hazardous Weather Outlook
National Weather Service Jacksonville FL
321 AM EDT Fri Aug 4 2017

AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040-124-125-
GAZ132>136-149>154-162>166-051000-
Coastal waters from Altamaha Sound to Fernandina Beach FL out
20 NM-
Coastal waters from Fernandina Beach to St. Augustine FL out
20 NM-
Coastal waters from St. Augustine to Flagler Beach FL out 20 NM-
Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to
60 NM-
Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-
Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM-
Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Inland Duval-Union-
Bradford-Clay-St. Johns-Gilchrist-Alachua-Putnam-Flagler-Marion-
Coastal Nassau-Coastal Duval-Coffee-Jeff Davis-Bacon-Appling-
Wayne-Atkinson-Ware-Pierce-Brantley-Inland Glynn-Coastal Glynn-
Echols-Clinch-Charlton-Inland Camden-Coastal Camden-
321 AM EDT Fri Aug 4 2017

This Hazardous Weather Outlook is for Northeast Florida,
Southeast Georgia and the Adjacent Coastal Waters.

.DAY ONE...Today and Tonight...

Waves of showers with embedded thunderstorms will increase in
coverage through the afternoon across southeast Georgia and the
Suwannee River Valley of northeast Florida. Periods of locally
heavy rainfall could cause localized flooding problems.

Thunderstorms will move inland generally south of Interstate 10
across northeast Florida by midday and toward the Atlantic coast
through this evening. A few strong thunderstorms will be possible
and could produce gusty winds, frequent lightning and locally
heavy rainfall.

Thunderstorm activity will decrease in coverage this evening.

A River Flood warning is in effect for the St. Marys River at
Macclenny.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

Thunderstorms are expected each day, with a few strong to
isolated severe storms possible. Stronger storms will be capable
of producing gusty winds, frequent lightning, and locally heavy
rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

For additional information, visit the National Weather Service in
Jacksonville website on the internet at weather.gov/jax.

In the hours before

Special weather statement, Aug 4, 3:11 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
311 PM EDT FRI AUG 4 2017

GAZ149-041945-
Atkinson GA-
311 PM EDT FRI AUG 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR ATKINSON COUNTY UNTIL 345 PM
EDT...

At 310 PM EDT, Doppler radar was tracking a strong thunderstorm near
Willacoochee, moving east at 30 mph.

Wind gusts of 40 to 50 mph can be expected along with possible minor
wind damage.

Locations impacted include...
Pearson, Willacoochee and Axson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Jacksonville.

&&

LAT...LON 3139 8297 3139 8285 3138 8283 3136 8282
      3136 8274 3118 8270 3119 8305 3123 8305
      3128 8303 3130 8306 3134 8306 3137 8311
      3138 8311
TIME...MOT...LOC 1910Z 248DEG 27KT 3126 8307

ZIBURA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 6:49 PM EDTSpecial Weather StatementJAXPutnam26 min
Aug 4, 7:11 PM EDTSpecial Weather StatementJAXPutnam19 min
Aug 4, 7:32 PM EDTSpecial Weather StatementJAXPutnam13 min
Aug 4, 7:45 PM EDTSpecial Weather StatementJAXPutnam30 min
Aug 4, 7:57 PM EDTSpecial Weather StatementJAXMarion33 min
Aug 4, 3:44 PM EDTSpecial Weather StatementJAXAtkinson31 min
Aug 4, 3:46 PM EDTSevere Thunderstorm WarningJAXAtkinson18 min
Aug 4, 3:55 PM EDTSevere Thunderstorm WarningJAXAtkinson, Coffee, Ware31 min
Aug 4, 4:14 PM EDTSpecial Weather StatementJAXBacon, Pierce46 min
Aug 4, 4:28 PM EDTSpecial Weather StatementJAXAppling, Jeff Davis32 min
Aug 4, 4:57 PM EDTSpecial Weather StatementJAXWayne48 min

Nearby

Special Weather Statements in Georgia, 2017Every special weather statement in 2017

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.