Alert archive / Georgia / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 429, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Sep 9, 2009, 4:43 PM EDT for Dawson County, Forsyth County, Hall County, Georgia. It was in force for 47 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
- Sep 9, 2009, 4:43 PM EDT (20:43 UTC)
- Expired
- Sep 9, 2009, 5:30 PM EDT
- In force
- 47 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
Counties Dawson County, GA, Forsyth County, GA, Hall County, GA
The radar
The Atlanta radar (KFFC), 126 km from the middle of the area, began a volume at 20:45 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 |
|---|---|---|---|
| Sep 9, 4:50 PM EDT | HAIL 0.88 | 2 Ne Dawsonville, GA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.7 hours before the alert went out and 123 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.
- Mixed-layer CAPE
- 591 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 1104 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS52 KFFC 092043
SVRFFC
GAC085-117-139-092130-
/O.NEW.KFFC.SV.W.0429.090909T2043Z-090909T2130Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
443 PM EDT WED SEP 9 2009
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN DAWSON COUNTY IN NORTH CENTRAL GEORGIA
NORTHEASTERN FORSYTH COUNTY IN NORTH CENTRAL GEORGIA
WEST CENTRAL HALL COUNTY IN NORTH CENTRAL GEORGIA
* UNTIL 530 PM EDT
* AT 441 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZED HAIL...AND
DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
DAWSONVILLE...MOVING SOUTHEAST AT 10 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
LUMPKIN...WAR HILL PARK...CHESTATEE...AQUALAND PARK AND OSCARVILLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF ON OR NEAR LAKE LANIER...GET OUT OF THE WATER IMMEDIATELY AND
MOVE TO SAFE SHELTER INDOORS OR INSIDE A VEHICLE. REMEMBER...
LIGHTNING CAN STRIKE AS FAR AS 15 MILES FROM THE PARENT
THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW. DONT BE CAUGHT ON
THE WATER IN A THUNDERSTORM
IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
&&
LAT...LON 3446 8409 3445 8407 3445 8406 3441 8398
3442 8395 3435 8379 3418 8398 3442 8416
TIME...MOT...LOC 2043Z 316DEG 8KT 3440 8403
$$2 follow-up statements
000
WWUS52 KFFC 092059
SVSFFC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
459 PM EDT WED SEP 9 2009
GAC085-117-139-092130-
/O.CON.KFFC.SV.W.0429.000000T0000Z-090909T2130Z/
FORSYTH GA-HALL GA-DAWSON GA-
459 PM EDT WED SEP 9 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHEASTERN DAWSON...WEST CENTRAL HALL AND NORTHEASTERN FORSYTH
COUNTIES...
AT 457 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
LUMPKIN...MOVING SOUTHEAST AT 10 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
AQUALAND PARK...OSCARVILLE...CHESTATEE...WAR HILL PARK...AND LAKE
LANIER.
DAWSON COUNTY EMERGENCY MANAGEMENT RECEIVED A REPORT OF NICKEL SIZE
HAIL ALONG HIGHWAY 136 IN SOUTHEASTERN DAWSON COUNTY AT 450 PM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
&&
LAT...LON 3446 8409 3445 8407 3445 8406 3441 8398
3442 8395 3435 8379 3418 8398 3442 8416
TIME...MOT...LOC 2058Z 315DEG 7KT 3440 8402
$$000
WWUS52 KFFC 092118
SVSFFC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
518 PM EDT WED SEP 9 2009
GAC085-117-139-092130-
/O.CON.KFFC.SV.W.0429.000000T0000Z-090909T2130Z/
FORSYTH GA-HALL GA-DAWSON GA-
518 PM EDT WED SEP 9 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHEASTERN DAWSON...WEST CENTRAL HALL AND NORTHEASTERN FORSYTH
COUNTIES...
AT 517 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZED
HAIL AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
WAR HILL PARK...MOVING SOUTHEAST AT 10 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
AQUALAND PARK...OSCARVILLE...LAKE LANIER...AND CHESTATEE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING NICKEL SIZE HAIL. SEEK SHELTER
NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS
IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
&&
LAT...LON 3436 8411 3441 8398 3442 8395 3435 8379
3418 8398
TIME...MOT...LOC 2118Z 321DEG 8KT 3435 8398
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 3:59 PM EDT | Severe Thunderstorm Warning | FFC | Catoosa | 46 min |
| Sep 9, 5:08 PM EDT | Severe Thunderstorm Warning | FFC | Towns, White | 23 min |
| Sep 9, 5:44 PM EDT | Severe Thunderstorm Warning | FFC | Dawson, Lumpkin | 35 min |
| Sep 9, 6:03 PM EDT | Severe Thunderstorm Warning | FFC | Forsyth, Gwinnett, Hall | 31 min |
| Sep 9, 6:49 PM EDT | Severe Thunderstorm Warning | FFC | Fannin | 41 min |
| Sep 9, 6:52 PM EDT | Severe Thunderstorm Warning | FFC | Banks, Hall, Jackson | 38 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2009Every severe thunderstorm warning in 2009
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.