Alert archive / Georgia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 4, NWS Charleston, SC

February 15, 2021Chatham County, Effingham County, Georgia; Jasper County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Feb 15, 2021, 7:01 PM EST for Chatham County, Effingham County, Georgia; Jasper County, South Carolina. It was in force for 29 min. 1 report 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
Feb 15, 2021, 7:01 PM EST (00:01 UTC)
Expired
Feb 15, 2021, 7:30 PM EST
In force
29 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Chatham County, GA, Effingham County, GA, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 66 km from the middle of the area, began a volume at 00:03 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
Feb 15, 7:07 PM ESTHAIL 1.52 N Pooler, GAA TRAINED SPOTTER REPORTED APPROXIMATE PING-PONG BALL SIZE HAIL VIA A SOCIAL MEDIA IMAGE NEAR THE INTERSECTION OF POOLER PKWY AND OUTLETS WAY.

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

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 0.0 hours before the alert went out and 146 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, Charleston AFB, SC at 00:00Z on 2021-02-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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, Charleston AFB, SC at 00:00Z on 2021-02-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 622 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
17 J/kg
Mixed-layer CIN
-168 J/kg
Mixed-layer LCL
440 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
622 m²/s²
0-3 km storm-relative helicity
717 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

Open this sounding in Storm Lab

The text

As transmitted.

334 
WUUS52 KCHS 160001
SVRCHS
GAC051-103-SCC053-160030-
/O.NEW.KCHS.SV.W.0004.210216T0001Z-210216T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
701 PM EST Mon Feb 15 2021

The National Weather Service in Charleston has issued a

* Severe Thunderstorm Warning for portions of...
  Effingham County in southeastern Georgia...
  Chatham County in southeastern Georgia...
  Jasper County in southeastern South Carolina...

* Until 730 PM EST.

* At 701 PM EST, a severe thunderstorm was located over I-16/I-95
  Interchange, moving north at 65 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and powerlines.

* Locations impacted include...
  Pooler, I-16/I-95 Interchange, Godley Station, Savannah 
  International Airport, Hunter Army Airfield, Windsor Forest, 
  Rincon, Garden City, Port Wentworth, Hardeeville, Bloomingdale, 
  Meinhard, Monteith and Burroughs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3199 8131 3200 8130 3205 8136 3233 8132
      3225 8103 3211 8110 3211 8111 3210 8110
      3191 8120
TIME...MOT...LOC 0001Z 200DEG 55KT 3205 8126 

HAIL...1.00IN
WIND...60MPH
 
$$

JRL
2 follow-up statements
784 
WWUS52 KCHS 160010
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
710 PM EST Mon Feb 15 2021

GAC051-103-SCC053-160030-
/O.CON.KCHS.SV.W.0004.000000T0000Z-210216T0030Z/
Effingham GA-Chatham GA-Jasper SC-
710 PM EST Mon Feb 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EST
FOR EFFINGHAM...CHATHAM AND JASPER COUNTIES...

At 710 PM EST, a severe thunderstorm was located over Meinhard,
moving north at 65 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Public.

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and powerlines.

Locations impacted include...
Pooler, Godley Station, Savannah International Airport, Rincon, 
Garden City, Port Wentworth, Hardeeville, Bloomingdale, Meinhard and 
Monteith.

This warning includes...
 I-16 between mile markers 163 and 165.
 I-516 between mile markers 5 and 9.
 I-95 in South Carolina between mile markers 2 and 5.
 I-95 in Georgia between mile markers 102 and 112.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3214 8135 3233 8132 3225 8103 3211 8110
      3211 8111 3210 8111 3206 8113
TIME...MOT...LOC 0010Z 200DEG 55KT 3218 8120 

HAIL...1.00IN
WIND...60MPH
 
$$

JRL
307 
WWUS52 KCHS 160020
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
720 PM EST Mon Feb 15 2021

GAC051-103-SCC053-160030-
/O.EXP.KCHS.SV.W.0004.000000T0000Z-210216T0030Z/
Effingham GA-Chatham GA-Jasper SC-
720 PM EST Mon Feb 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR EFFINGHAM...CHATHAM AND JASPER
COUNTIES WILL EXPIRE AT 730 PM EST...
        
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.

LAT...LON 3214 8135 3233 8132 3225 8103 3211 8110
      3211 8111 3210 8111 3206 8113
TIME...MOT...LOC 0020Z 200DEG 55KT 3229 8115 

$$

JRL

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 16, 11:33 AM ESTRiver Flood WarningCHSEvans8 days
Feb 15, 7:19 PM ESTSpecial Weather StatementCHSJasper26 min
Feb 15, 7:27 PM ESTSevere Thunderstorm WarningCHSHampton, Jasper32 min
Feb 15, 7:39 PM ESTSpecial Marine WarningCHS87 min
Feb 15, 8:59 PM ESTSpecial Marine WarningCHS61 min
Feb 15, 9:33 PM ESTSpecial Marine WarningCHS57 min
Feb 15, 9:39 PM ESTSpecial Marine WarningCHS110 min
Feb 15, 10:15 PM ESTSpecial Marine WarningCHS2 hr
Feb 15, 10:32 PM ESTSpecial Marine WarningCHS21 min
Feb 16, 12:07 AM ESTSpecial Marine WarningCHS33 min
Feb 16, 3:24 AM ESTMarine Dense Fog AdvisoryCHS5 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2021Severe Thunderstorm Warnings in South Carolina, 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.