Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

August 20, 2021Pierce County, Georgia

NWS Jacksonville, FL issued this special weather statement at Aug 20, 2021, 7:31 PM EDT for Pierce County, Georgia. It was in force for 29 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 20, 2021, 7:31 PM EDT (23:31 UTC)
Expired
Aug 20, 2021, 8:00 PM EDT
In force
29 min
Issued by
NWS Jacksonville, FL
Hail
0.00 in
Wind
50

County Pierce County, GA

The radar

The Moody AFB radar (KVAX), 80 km from the middle of the area, began a volume at 23:33 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, 11.5 hours before the alert went out and 88 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 2021-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1224 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 2021-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
1224 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1047 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
2 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 20, 4:07 PM EDT, 3 hours 24 minutes earlier.

Area forecast discussion, Aug 20, 4:07 PM EDT, 3 hours 24 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>

In the hours before

Special weather statement, Aug 20, 2:20 PM EDT, 5 hours 11 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
220 PM EDT Fri Aug 20 2021

FLZ024-GAZ264-350-364-201900-
Inland Nassau FL-Northeastern Charlton GA-Western Charlton GA-
Southern Ware GA-
220 PM EDT Fri Aug 20 2021

...A strong thunderstorm will impact portions of northwestern Nassau,
eastern Ware and central Charlton Counties through 300 PM EDT...

At 220 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles west of Homeland, or 8 miles west of Folkston, moving southeast
at 15 mph.

HAZARD...Wind gusts up to 50 mph, pea size hail, and excessive
         cloud-to-ground lightning.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible. Excessive cloud-to-ground lightning is occurring.

Locations impacted include...
Hilliard, Folkston and Homeland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3073 8176 3051 8212 3082 8227 3093 8206
      3082 8189 3080 8188 3079 8186
TIME...MOT...LOC 1820Z 322DEG 15KT 3084 8215

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

HESS
Special weather statement, Aug 20, 3:09 PM EDT, 4 hours 22 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
309 PM EDT Fri Aug 20 2021

FLZ340-201945-
Western Marion FL-
309 PM EDT Fri Aug 20 2021

...A strong thunderstorm will impact portions of southwestern Marion
County through 345 PM EDT...

At 309 PM EDT, Doppler radar was tracking a strong thunderstorm near
Rainbow Lakes Estates, moving south at 10 mph.

HAZARD...Winds in excess of 40 mph, excessive cloud-to-ground
         lightning, and minor flooding due to heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Excessive cloud-to-ground lightning is
         occurring. Minor flooding due to heavy rainfall is
         possible.

Locations impacted include...
Dunnellon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2897 8232 2899 8235 2901 8239 2902 8240
      2902 8242 2905 8247 2905 8249 2904 8250
      2904 8253 2919 8254 2896 8226 2896 8231
TIME...MOT...LOC 1909Z 001DEG 9KT 2907 8250

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

HESS
Special weather statement, Aug 20, 3:38 PM EDT, 3 hours 53 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
338 PM EDT Fri Aug 20 2021

FLZ023-030-031-033-125-132-133-225-232-325-425-202015-
Eastern Clay FL-Coastal St. Johns FL-Baker FL-Western Clay FL-
Union FL-Western Duval FL-South Central Duval FL-Trout River FL-
Bradford FL-Coastal Duval FL-Inland St. Johns FL-
338 PM EDT Fri Aug 20 2021

...Strong thunderstorms will impact portions of northeastern
Bradford, northwestern St. Johns, southeastern Baker, northeastern
Union, northern Clay and southern Duval Counties through 415 PM
EDT...

At 337 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Normandy to near Glen St. Mary. Movement
was southeast at 15 mph.

HAZARD...Winds in excess of 40 mph and minor flooding due to heavy
         rainfall.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor flooding due to heavy rainfall is
         possible.

Locations impacted include...
Jacksonville, Orange Park, Mandarin, Fruit Cove, Arlington,
Middleburg, Macclenny, Baymeadows, Cisco Gardens and Ortega.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3015 8135 2992 8206 3023 8221 3030 8205
      3027 8205 3032 8200 3043 8172
TIME...MOT...LOC 1937Z 319DEG 12KT 3034 8178 3021 8214

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

HESS
Local storm report, Aug 20, 3:48 PM EDT, 3 hours 43 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>
Special weather statement, Aug 20, 7:11 PM EDT, 20 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>
Special weather statement, Aug 20, 7:31 PM EDT, 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 Jacksonville, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 19, 8:28 PM EDTSpecial Weather StatementJAXHamilton47 min
Aug 19, 9:09 PM EDTAreal Flood WarningJAXHamilton96 min
Aug 20, 3:09 PM EDTSpecial Weather StatementJAXCitrus36 min
Aug 20, 3:38 PM EDTSpecial Weather StatementJAXClay, Duval37 min
Aug 20, 1:38 PM EDTSpecial Weather StatementJAXWare52 min
Aug 20, 2:20 PM EDTSpecial Weather StatementJAXCharlton40 min
Aug 20, 7:11 PM EDTSpecial Weather StatementJAXWare34 min
Aug 20, 7:59 PM EDTSpecial Weather StatementJAXBrantley31 min

Nearby

Special Weather Statements in Georgia, 2021Every special weather statement 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.