Alert archive / Florida / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 55, NWS Jacksonville, FL

April 13, 2023Clay County, Saint Johns County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 13, 2023, 3:17 PM EDT for Clay County, Saint Johns County, Florida. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 13, 2023, 3:17 PM EDT (19:17 UTC)
Expired
Apr 13, 2023, 4:00 PM EDT
In force
43 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Clay County, FL, Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 60 km from the middle of the area, began a volume at 19:19 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 13, 2:30 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 7.3 hours before the alert went out and 62 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 2023-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 72 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 2023-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
72 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
621 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 13, 2:01 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, Apr 13, 2:01 PM EDT, 1 hour 16 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, Apr 13, 9:51 AM EDT, 5 hours 26 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
951 AM EDT Thu Apr 13 2023

GAZ166-131415-
Coastal Camden GA-
951 AM EDT Thu Apr 13 2023

...A gusty shower will impact portions of southeastern Camden County
through 1015 AM EDT...

At 951 AM EDT, Doppler radar was tracking a gusty shower capable of
producing a landspout near Fernandina Beach, moving northwest at 15
mph.

HAZARD...Landspouts and winds around 40 mph.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible. Gusty winds
         could knock down tree limbs and blow around unsecured
         objects.

Locations impacted include...
St. Marys, Kings Bay Base, High Point, Dungeness, Cumberland Island
and Harrietts Bluff.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3079 8142 3069 8141 3070 8144 3069 8150
      3072 8149 3069 8151 3070 8154 3072 8150
      3072 8151 3071 8154 3072 8155 3071 8158
      3070 8158 3082 8163 3097 8160 3105 8142
      3102 8143 3103 8141 3097 8139
TIME...MOT...LOC 1351Z 154DEG 11KT 3071 8140

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

HESS
Special weather statement, Apr 13, 2:29 PM EDT, 48 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
229 PM EDT Thu Apr 13 2023

GAZ132-149-131915-
Atkinson GA-Coffee GA-
229 PM EDT Thu Apr 13 2023

...A strong thunderstorm will impact portions of central Coffee and
north central Atkinson Counties through 315 PM EDT...

At 228 PM EDT, Doppler radar was tracking a strong thunderstorm
capable of producing a landspout near Pearson, moving north at 30
mph.

HAZARD...Funnel Clouds and winds around 40 mph.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible. Gusty winds
         could knock down tree limbs and blow around unsecured
         objects.

Locations impacted include...
Douglas, Broxton and West Green.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3133 8289 3136 8299 3167 8297 3167 8268
TIME...MOT...LOC 1828Z 197DEG 25KT 3136 8291

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

KB
Special weather statement, Apr 13, 2:46 PM EDT, 31 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
246 PM EDT Thu Apr 13 2023

FLZ132-137-232-237-131930-
Eastern Clay FL-Western Clay FL-Eastern Putnam FL-Western Putnam FL-
246 PM EDT Thu Apr 13 2023

...A strong thunderstorm will impact portions of north central Putnam
and eastern Clay Counties through 330 PM EDT...

At 246 PM EDT, Doppler radar was tracking a strong thunderstorm near
George's Lake, or 12 miles southwest of Green Cove Springs, moving
northeast at 30 mph.

HAZARD...Winds around 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Green Cove Springs, Fleming Island, George's Lake and Penney Farms.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northeastern Florida.

&&

LAT...LON 2970 8186 2992 8188 3014 8169 3011 8168
      3005 8169 3003 8169 3001 8168 2998 8163
      2992 8160 2990 8161 2984 8158
TIME...MOT...LOC 1846Z 213DEG 26KT 2985 8181

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

KB
Special weather statement, Apr 13, 3:14 PM EDT, 3 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
314 PM EDT Thu Apr 13 2023

GAZ132-133-132000-
Coffee GA-Jeff Davis GA-
314 PM EDT Thu Apr 13 2023

...A strong thunderstorm will impact portions of central Coffee and
western Jeff Davis Counties through 400 PM EDT...

At 314 PM EDT, Doppler radar was tracking a strong thunderstorm
producing a landspout near West Green, or near Broxton, moving north
at 25 mph.

HAZARD...Funnel clouds, winds around 40 mph, and penny size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible. Gusty winds
         could knock down tree limbs and blow around unsecured
         objects.

Locations impacted include...
Hazlehurst, Broxton, Pridgen, West Green, Snipesville and Denton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Tornado Watch remains in effect until 700 PM EDT for southeastern
Georgia.

&&

LAT...LON 3153 8276 3156 8290 3178 8296 3178 8292
      3179 8290 3178 8289 3178 8287 3182 8284
      3181 8282 3184 8278 3185 8279 3186 8276
      3190 8270 3192 8265 3193 8262 3194 8260
      3193 8259 3196 8256 3196 8253
TIME...MOT...LOC 1914Z 195DEG 23KT 3158 8282

LANDSPOUT...OBSERVED
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

KB

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 8:00 AM EDTSpecial Marine WarningJAX60 min
Apr 13, 8:10 AM EDTSpecial Weather StatementJAXDuval50 min
Apr 13, 8:51 AM EDTSpecial Marine WarningJAX54 min
Apr 13, 9:05 AM EDTSevere Thunderstorm WarningJAXNassau40 min
Apr 13, 9:19 AM EDTSpecial Marine WarningJAX56 min
Apr 13, 2:46 PM EDTSpecial Weather StatementJAXClay44 min
Apr 13, 3:35 PM EDTSpecial Weather StatementJAXNassau40 min
Apr 13, 3:41 PM EDTSpecial Marine WarningJAX64 min
Apr 13, 3:45 PM EDTSpecial Weather StatementJAXSaint Johns45 min
Apr 13, 4:10 PM EDTSpecial Weather StatementJAXSaint Johns35 min
Apr 13, 4:18 PM EDTSpecial Marine WarningJAX57 min
Apr 13, 4:21 PM EDTSpecial Weather StatementJAXDuval54 min
Apr 13, 4:25 PM EDTSevere Thunderstorm WarningJAXSaint Johns35 min
Apr 13, 4:49 PM EDTSpecial Weather StatementJAXFlagler41 min
Apr 13, 4:51 PM EDTSevere Thunderstorm WarningJAXFlagler24 min
Apr 13, 4:56 PM EDTSevere Thunderstorm WarningJAXFlagler, Saint Johns34 min
Apr 13, 5:10 PM EDTSpecial Marine WarningJAX65 min
Apr 13, 5:32 PM EDTSpecial Weather StatementJAXFlagler43 min
Apr 13, 5:43 PM EDTSevere Thunderstorm WarningJAXClay, Duval47 min
Apr 13, 6:20 PM EDTSpecial Weather StatementJAXNassau55 min
Apr 13, 6:25 PM EDTSpecial Weather StatementJAXSaint Johns35 min
Apr 13, 6:28 PM EDTSpecial Marine WarningJAX62 min
Apr 13, 6:42 PM EDTAreal Flood AdvisoryJAXSaint Johns63 min
Apr 13, 6:56 PM EDTSpecial Weather StatementJAXSaint Johns34 min
Apr 13, 7:07 PM EDTSevere Thunderstorm WarningJAXDuval, Saint Johns23 min
Apr 13, 7:21 PM EDTSpecial Marine WarningJAX114 min
Apr 13, 7:30 PM EDTSpecial Weather StatementJAXDuval30 min
Apr 13, 7:50 PM EDTAreal Flood AdvisoryJAXSaint Johns55 min
Apr 13, 8:52 AM EDTSpecial Weather StatementJAXCamden38 min
Apr 13, 9:51 AM EDTSpecial Weather StatementJAXCamden24 min
Apr 13, 2:29 PM EDTSpecial Weather StatementJAXCoffee46 min
Apr 13, 2:37 PM EDTSevere Thunderstorm WarningJAXAtkinson, Coffee38 min
Apr 13, 3:14 PM EDTSpecial Weather StatementJAXCoffee, Jeff Davis46 min
Apr 13, 3:22 PM EDTSevere Thunderstorm WarningJAXCoffee, Jeff Davis38 min
Apr 13, 3:42 PM EDTTornado WarningJAXJeff Davis33 min
Apr 13, 4:03 PM EDTSevere Thunderstorm WarningJAXJeff Davis27 min
Apr 13, 4:13 PM EDTSpecial Weather StatementJAXPierce47 min
Apr 13, 4:16 PM EDTTornado WarningJAXJeff Davis29 min
Apr 13, 4:31 PM EDTSpecial Weather StatementJAXJeff Davis44 min
Apr 13, 4:34 PM EDTSevere Thunderstorm WarningJAXPierce41 min
Apr 13, 4:39 PM EDTTornado WarningJAXAppling, Jeff Davis21 min
Apr 13, 4:59 PM EDTSpecial Weather StatementJAXAppling, Wayne61 min
Apr 13, 5:06 PM EDTSevere Thunderstorm WarningJAXAppling, Wayne39 min
Apr 13, 5:10 PM EDTTornado WarningJAXAppling, Wayne35 min
Apr 13, 5:46 PM EDTSpecial Weather StatementJAXWayne44 min
Apr 13, 7:46 PM EDTSpecial Weather StatementJAXBrantley14 min
Apr 13, 7:59 PM EDTSpecial Weather StatementJAXPierce31 min

Nearby

Severe Thunderstorm Warnings in Florida, 2023Every severe thunderstorm warning in 2023

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.