Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 119, NWS Columbia, SC

July 1, 2012Columbia County, McDuffie County, Richmond County, Georgia

NWS Columbia, SC issued this severe thunderstorm warning at Jul 1, 2012, 4:20 PM EDT for Columbia County, McDuffie County, Richmond County, Georgia. It was in force for 40 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: Jul 1, 2012, 4:20 PM EDT (20:20 UTC)
Expired: Jul 1, 2012, 5:00 PM EDT
In force: 40 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Columbia County, GA, McDuffie County, GA, Richmond County, GA

The radar

The Robins AFB radar (KJGX), 121 km from the middle of the area, began a volume at 20:21 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

Time	Report	Where	Remark
Jul 1, 4:26 PM EDT	HAIL 1.75	Dearing, GA
Jul 1, 4:30 PM EDT	HAIL 1.25	2 S Thomson, GA	HALF DOLLAR SIZED HAIL SHREDDED LEAVES AND LEFT SEVERAL DENTS ON CARS
Jul 1, 4:44 PM EDT	HAIL 1.25	Thomson, GA

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.

Issued	Product	Office	Lasted
Jul 1, 2:01 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.3 hours before the alert went out and 190 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: 2785 J/kg
Mixed-layer CIN: -200 J/kg
Mixed-layer LCL: 1830 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -38 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

431 
WUUS52 KCAE 012020
SVRCAE
GAC073-189-245-012100-
/O.NEW.KCAE.SV.W.0119.120701T2020Z-120701T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
420 PM EDT SUN JUL 1 2012

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN RICHMOND COUNTY IN EAST CENTRAL GEORGIA
  MCDUFFIE COUNTY IN EAST CENTRAL GEORGIA
  SOUTHWESTERN COLUMBIA COUNTY IN EAST CENTRAL GEORGIA

* UNTIL 500 PM EDT

* AT 418 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  HARLEM...OR 8 MILES EAST OF THOMSON...AND MOVING SOUTHEAST AT 10
  MPH.

* SOME COMMUNITIES IN THE WARNING AREA INCLUDE THOMSON AND HARLEM

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE...TOLL FREE 1 877 6 3
3...6 7 7 2.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SUNDAY EVENING FOR EAST CENTRAL GEORGIA AND CENTRAL SOUTH CAROLINA.

&&

LAT...LON 3366 8249 3364 8248 3364 8246 3366 8243
      3329 8216 3327 8228 3331 8234 3331 8239
      3334 8245 3334 8250 3335 8254 3342 8256
      3346 8260 3360 8265
TIME...MOT...LOC 2020Z 301DEG 7KT 3346 8235

$$

SJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 2:52 PM EDT	Severe Thunderstorm Warning	CAE	Columbia, Richmond	53 min
Jul 1, 3:42 PM EDT	Severe Thunderstorm Warning	CAE	Columbia, Lincoln, Richmond	63 min
Jul 1, 4:42 PM EDT	Severe Thunderstorm Warning	CAE	Columbia, Lincoln	33 min
Jul 1, 5:02 PM EDT	Severe Thunderstorm Warning	CAE	Columbia, Lincoln, McDuffie	43 min
Jul 1, 5:43 PM EDT	Severe Thunderstorm Warning	CAE	Burke, Columbia, Lincoln, Richmond	47 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012 Every severe thunderstorm warning in 2012

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.