Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 201, NWS Columbia, SC

September 22, 2017Richmond County, Georgia

NWS Columbia, SC issued this severe thunderstorm warning at Sep 22, 2017, 3:03 PM EDT for Richmond 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
Sep 22, 2017, 3:03 PM EDT (19:03 UTC)
Expired
Sep 22, 2017, 3:32 PM EDT
In force
29 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Richmond County, GA

The radar

The Columbia radar (KCAE), 118 km from the middle of the area, began a volume at 19:05 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

Charleston AFB, SC (KCHS), launched 12:00Z, 7.1 hours before the alert went out and 209 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 12:00Z on 2017-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 530 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2017-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 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
530 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1019 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
10 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

710 
WUUS52 KCAE 221903
SVRCAE
GAC245-221945-
/O.NEW.KCAE.SV.W.0201.170922T1903Z-170922T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
303 PM EDT FRI SEP 22 2017

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Central Richmond County in east central Georgia...

* Until 345 PM EDT

* At 303 PM EDT, a severe thunderstorm was located near Fort Gordon,
  moving southwest at 10 mph.

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

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Fort Gordon and Blythe. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3336 8227 3346 8213 3332 8203 3329 8221
TIME...MOT...LOC 1903Z 059DEG 11KT 3336 8214 

HAIL...1.00IN
WIND...60MPH
 
$$
2 follow-up statements
691 
WWUS52 KCAE 221922
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
322 PM EDT FRI SEP 22 2017

GAC245-221945-
/O.CON.KCAE.SV.W.0201.000000T0000Z-170922T1945Z/
Richmond GA-
322 PM EDT FRI SEP 22 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR SOUTHWESTERN RICHMOND COUNTY...

At 320 PM EDT, a severe thunderstorm was located in the Fort Gordon
area of Richmond County. The storm was especially strong in the area
just north of Blythe. Movement was southwest near 10 mph. 

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

SOURCE...Radar indicated. 

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

Locations impacted include...
Fort Gordon and Blythe. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3339 8222 3343 8217 3344 8216 3339 8212
      3330 8212 3329 8221 3334 8225
TIME...MOT...LOC 1920Z 059DEG 11KT 3333 8219 

HAIL...1.00IN
WIND...60MPH
 
$$
940 
WWUS52 KCAE 221932
SVSCAE

Severe Weather Statement
National Weather Service Columbia SC
332 PM EDT FRI SEP 22 2017

GAC245-221941-
/O.CAN.KCAE.SV.W.0201.000000T0000Z-170922T1945Z/
Richmond GA-
332 PM EDT FRI SEP 22 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN RICHMOND COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
The threat of damaging wind and hail has diminished. 

LAT...LON 3339 8222 3343 8217 3344 8216 3339 8212
      3330 8212 3329 8221 3334 8225
TIME...MOT...LOC 1925Z 059DEG 11KT 3331 8223 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 22, 2:26 PM EDTSpecial Weather StatementCAERichmond49 min
Sep 22, 2:39 PM EDTAreal Flood AdvisoryCAERichmond3 hr
Sep 22, 2:39 PM EDTSevere Thunderstorm WarningCAERichmond31 min
Sep 22, 3:38 PM EDTSpecial Weather StatementCAEJefferson37 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017Every severe thunderstorm warning in 2017

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.