Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 47, NWS Jacksonville, FL

April 24, 2021Charlton County, Ware County, Georgia; Baker County, Nassau County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 24, 2021, 3:57 PM EDT for Charlton County, Ware County, Georgia; Baker County, Nassau County, Florida. It was in force for 48 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 24, 2021, 3:57 PM EDT (19:57 UTC)
Expired
Apr 24, 2021, 4:45 PM EDT
In force
48 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon
Hail
1.75 in
Wind
50.0 mph

Counties Baker County, FL, Nassau County, FL, Charlton County, GA, Ware County, GA

The radar

The Jacksonville radar (KJAX), 18 km from the middle of the area, began a volume at 19:57 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.

What was reported inside it

TimeReportWhereRemark
Apr 24, 4:21 PM EDTHAIL 11 Nw Callahan, FLESTIMATED QUARTER-SIZED HAIL NEAR CALLAHAN ON SATURDAY AFTERNOON. ESTIMATED TIME BASED ON RADAR DATA.
Apr 24, 4:24 PM EDTTSTM WND DMG1 Se Callahan, FLNASSUA COUNTY 911 REPORTED A TREE DOWNED ALONG US-1 NEAR CALLAHAN. TIME ESTIMATION BASED ON RADAR.
Apr 24, 4:27 PM EDTTSTM WND DMG4 Ese Callahan, FL911 CALL CENTER REPORTED A WIRE DOWN ON JONAS DR. TIME ESTIMATION BASED ON RADAR

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Apr 24, 10:35 AM EDTTornado WatchSPC7 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.0 hours before the alert went out and 17 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 2021-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2021-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
984 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
180 m²/s²
0-3 km storm-relative helicity
276 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

263 
WUUS52 KJAX 241957
SVRJAX
FLC003-089-GAC049-299-242045-
/O.NEW.KJAX.SV.W.0047.210424T1957Z-210424T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jacksonville FL
357 PM EDT Sat Apr 24 2021

The National Weather Service in Jacksonville has issued a

* Severe Thunderstorm Warning for...
  Northwestern Nassau County in northeastern Florida...
  North central Baker County in northeastern Florida...
  Southeastern Ware County in southeastern Georgia...
  Southeastern Charlton County in southeastern Georgia...

* Until 445 PM EDT.

* At 357 PM EDT, a severe thunderstorm was located 10 miles north of
  Taylor, or 17 miles south of Stephen Foster State Park, moving east
  at 55 mph.

  HAZARD...Golf ball size hail.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect 
           damage to roofs, siding, windows, and vehicles.

* Locations impacted include...
  Hilliard, Callahan, Ratliff, St. George and Nassau Village-Ratliff.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM EDT for northeastern
Florida...and southeastern Georgia.

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a basement or small
interior room.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3075 8166 3056 8172 3054 8174 3054 8176
      3051 8178 3051 8179 3044 8186 3046 8231
      3068 8228 3075 8169 3074 8167 3075 8167
TIME...MOT...LOC 1957Z 269DEG 47KT 3058 8224 

HAIL...1.75IN
WIND...<50MPH
 
$$

BOOTHE
2 follow-up statements
117 
WWUS52 KJAX 242026
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
426 PM EDT Sat Apr 24 2021

GAC299-242035-
/O.CAN.KJAX.SV.W.0047.000000T0000Z-210424T2045Z/
Ware GA-
426 PM EDT Sat Apr 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WARE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 600 PM EDT for northeastern
Florida.

LAT...LON 3075 8166 3056 8172 3054 8174 3054 8176
      3051 8178 3051 8179 3044 8186 3046 8231
      3056 8230 3057 8188 3074 8180 3074 8167
      3075 8167
TIME...MOT...LOC 2025Z 269DEG 47KT 3059 8180 

$$

FLC003-089-GAC049-242045-
/O.CON.KJAX.SV.W.0047.000000T0000Z-210424T2045Z/
Nassau FL-Baker FL-Charlton GA-
426 PM EDT Sat Apr 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHWESTERN NASSAU...NORTH CENTRAL BAKER AND SOUTHEASTERN
CHARLTON COUNTIES...

At 425 PM EDT, a severe thunderstorm was located over Callahan,
moving east at 55 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Callahan, Ratliff, St. George and Nassau Village-Ratliff. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM EDT for northeastern
Florida.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3075 8166 3056 8172 3054 8174 3054 8176
      3051 8178 3051 8179 3044 8186 3046 8231
      3056 8230 3057 8188 3074 8180 3074 8167
      3075 8167
TIME...MOT...LOC 2025Z 269DEG 47KT 3059 8180 

HAIL...1.25IN
WIND...60MPH
 
$$

BOOTHE
083 
WWUS52 KJAX 242036
SVSJAX

Severe Weather Statement
National Weather Service Jacksonville FL
436 PM EDT Sat Apr 24 2021

FLC003-089-GAC049-242046-
/O.EXP.KJAX.SV.W.0047.000000T0000Z-210424T2045Z/
Nassau FL-Baker FL-Charlton GA-
436 PM EDT Sat Apr 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN NASSAU...NORTH
CENTRAL BAKER AND SOUTHEASTERN CHARLTON COUNTIES WILL EXPIRE AT 445
PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Tornado Watch remains in effect until 600 PM EDT for northeastern
Florida.

LAT...LON 3075 8166 3056 8172 3054 8174 3054 8176
      3051 8178 3051 8179 3044 8186 3046 8231
      3056 8230 3057 8188 3074 8180 3074 8167
      3075 8167
TIME...MOT...LOC 2036Z 269DEG 47KT 3059 8165 

$$

BOOTHE

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 24, 10:57 AM EDTSevere Thunderstorm WarningJAXAtkinson, Clinch48 min
Apr 24, 11:15 AM EDTSevere Thunderstorm WarningJAXCoffee45 min
Apr 24, 11:35 AM EDTSevere Thunderstorm WarningJAXBacon, Ware40 min
Apr 24, 11:54 AM EDTSevere Thunderstorm WarningJAXAtkinson21 min
Apr 24, 12:04 PM EDTSevere Thunderstorm WarningJAXAppling, Brantley, Pierce, Wayne41 min
Apr 24, 12:08 PM EDTTornado WarningJAXBacon22 min
Apr 24, 12:18 PM EDTSevere Thunderstorm WarningJAXAtkinson, Bacon, Clinch, Pierce, Ware31 min
Apr 24, 12:36 PM EDTSevere Thunderstorm WarningJAXWayne24 min
Apr 24, 12:40 PM EDTSpecial Weather StatementJAXClinch50 min
Apr 24, 12:47 PM EDTSpecial Weather StatementJAXClinch, Pierce, Ware, Wayne28 min
Apr 24, 1:20 PM EDTSpecial Weather StatementJAXBrantley, Clinch, Ware25 min
Apr 24, 1:46 PM EDTSevere Thunderstorm WarningJAXClinch, Echols44 min
Apr 24, 1:50 PM EDTSpecial Weather StatementJAXCamden, Charlton, Glynn40 min
Apr 24, 2:15 PM EDTSevere Thunderstorm WarningJAXGlynn15 min
Apr 24, 2:32 PM EDTSevere Thunderstorm WarningJAXClinch, Echols43 min
Apr 24, 2:36 PM EDTTornado WarningJAXEchols24 min
Apr 24, 2:56 PM EDTSevere Thunderstorm WarningJAXClinch, Echols49 min
Apr 24, 3:03 PM EDTTornado WarningJAXClinch, Echols27 min
Apr 24, 3:30 PM EDTSevere Thunderstorm WarningJAXClinch, Echols, Ware45 min
Apr 24, 3:48 PM EDTSpecial Weather StatementJAXCamden27 min
Apr 24, 4:10 PM EDTSevere Thunderstorm WarningJAXCharlton28 min
Apr 24, 4:18 PM EDTSevere Thunderstorm WarningJAXCamden42 min
Apr 24, 5:40 PM EDTSpecial Weather StatementJAXCoffee, Jeff Davis35 min
Apr 24, 6:18 PM EDTSpecial Weather StatementJAXAppling, Bacon, Coffee, Jeff Davis, Wayne87 min
Apr 24, 6:39 PM EDTSevere Thunderstorm WarningJAXAtkinson, Coffee36 min
Apr 24, 7:12 PM EDTSevere Thunderstorm WarningJAXAppling, Atkinson, Bacon, Coffee, Pierce, Ware33 min
Apr 24, 7:40 PM EDTSevere Thunderstorm WarningJAXAppling, Bacon, Brantley, Pierce, Ware, Wayne35 min
Apr 24, 7:57 PM EDTSpecial Weather StatementJAXCoffee, Jeff Davis48 min
Apr 24, 1:37 PM EDTSpecial Marine WarningJAX113 min
Apr 24, 3:14 PM EDTSevere Thunderstorm WarningJAXColumbia, Hamilton46 min
Apr 24, 3:21 PM EDTSpecial Weather StatementJAXDuval24 min
Apr 24, 3:25 PM EDTSpecial Marine WarningJAX79 min
Apr 24, 3:40 PM EDTSevere Thunderstorm WarningJAXBaker, Columbia, Hamilton35 min
Apr 24, 4:44 PM EDTSpecial Marine WarningJAX46 min
Apr 24, 5:10 PM EDTSpecial Marine WarningJAX35 min
Apr 24, 5:20 PM EDTSpecial Weather StatementJAXDuval25 min
Apr 24, 5:31 PM EDTSpecial Marine WarningJAX59 min
Apr 24, 6:11 PM EDTSpecial Marine WarningJAX64 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2021Severe Thunderstorm Warnings in Florida, 2021Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.