Alert archive / Georgia / Tornado Warnings in 2020

Tornado Warning 13, NWS Charleston, SC

April 13, 2020Bryan County, Chatham County, Georgia

NWS Charleston, SC issued this tornado warning at Apr 13, 2020, 8:21 AM EDT for Bryan County, Chatham County, Georgia. It was in force for 24 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: Apr 13, 2020, 8:21 AM EDT (12:21 UTC)
Expired: Apr 13, 2020, 8:45 AM EDT
In force: 24 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bryan County, GA, Chatham County, GA

The radar

The Charleston,SC radar (KCLX), 95 km from the middle of the area, began a volume at 12:24 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.

Issued	Product	Office	Lasted
Apr 13, 3:20 AM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 0.4 hours before the alert went out and 156 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1152 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 756 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 550 m²/s²
0-3 km storm-relative helicity: 743 m²/s²
Significant tornado parameter: 4.7
Supercell composite: 16.6

Open this sounding in Storm Lab

The text

As transmitted.

516 
WFUS52 KCHS 131221
TORCHS
GAC029-051-131245-
/O.NEW.KCHS.TO.W.0013.200413T1221Z-200413T1245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Charleston SC
821 AM EDT Mon Apr 13 2020

The National Weather Service in Charleston has issued a

* Tornado Warning for portions of...
  Bryan County in southeastern Georgia...
  Chatham County in southeastern Georgia...

* Until 845 AM EDT.
    
* At 821 AM EDT, a severe thunderstorm capable of producing a tornado
  was located over Keller, moving east at 50 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Tybee Island, Fort Pulaski National Monument, Coffee Bluff,
  Wilmington Island, Montgomery, Fort Mcallister, Skidaway Island,
  Keller, Wassaw Island and Isle Of Hope.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 3171 8114 3171 8117 3173 8121 3174 8122
      3175 8125 3190 8128 3205 8083 3201 8081
      3195 8083 3171 8110 3170 8114
TIME...MOT...LOC 1221Z 256DEG 44KT 3181 8124 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

SPR

2 follow-up statements

734 
WWUS52 KCHS 131233
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
833 AM EDT Mon Apr 13 2020

GAC029-051-131245-
/O.CON.KCHS.TO.W.0013.000000T0000Z-200413T1245Z/
Bryan GA-Chatham GA-
833 AM EDT Mon Apr 13 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 845 AM EDT FOR BRYAN AND
CHATHAM COUNTIES...
    
At 833 AM EDT, a severe thunderstorm capable of producing a tornado
was located 7 miles south of Skidaway Island, moving east at 50 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Tybee Island, Wilmington Island, Montgomery, Skidaway Island and
Wassaw Island.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.

&&

LAT...LON 3175 8116 3188 8118 3189 8117 3186 8116
      3189 8116 3205 8083 3201 8081 3195 8083
      3192 8086 3171 8110
TIME...MOT...LOC 1233Z 259DEG 42KT 3183 8108 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

SPR

965 
WWUS52 KCHS 131244
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
844 AM EDT Mon Apr 13 2020

GAC029-051-131254-
/O.EXP.KCHS.TO.W.0013.000000T0000Z-200413T1245Z/
Bryan GA-Chatham GA-
844 AM EDT Mon Apr 13 2020

...THE TORNADO WARNING FOR BRYAN AND CHATHAM COUNTIES WILL EXPIRE AT
845 AM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

LAT...LON 3175 8116 3188 8118 3189 8117 3186 8116
      3189 8116 3205 8083 3201 8081 3195 8083
      3192 8086 3171 8110
TIME...MOT...LOC 1244Z 256DEG 44KT 3186 8094 

$$

SPR

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 13, 4:44 AM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Candler, Jenkins, Screven	61 min
Apr 13, 5:33 AM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Candler, Effingham, Evans, Jenkins, Screven and 1 more	57 min
Apr 13, 5:54 AM EDT	Tornado Warning	CHS	Screven	36 min
Apr 13, 6:22 AM EDT	Severe Thunderstorm Warning	CHS	Effingham	53 min
Apr 13, 6:29 AM EDT	Severe Thunderstorm Warning	CHS	Bryan, Bulloch, Candler, Effingham, Evans, Liberty and 2 more	61 min
Apr 13, 7:15 AM EDT	Severe Thunderstorm Warning	CHS	Bryan, Chatham, Liberty, Long, McIntosh, Tattnall	60 min
Apr 13, 7:33 AM EDT	Tornado Warning	CHS	Liberty, Long	27 min
Apr 13, 7:57 AM EDT	Tornado Warning	CHS	Bryan, Liberty, Long	33 min
Apr 13, 8:13 AM EDT	Severe Thunderstorm Warning	CHS	Bryan, Chatham, Liberty, McIntosh	62 min

Nearby

Tornado Warnings in Georgia, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.