Alert archive / Georgia / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 104, NWS Atlanta, GA
NWS Atlanta, GA issued this severe thunderstorm warning at Apr 4, 2011, 6:20 PM EDT for Catoosa County, Dade County, Walker County, Georgia. It was in force for 40 min. 5 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
- Apr 4, 2011, 6:20 PM EDT (22:20 UTC)
- Expired
- Apr 4, 2011, 7:00 PM EDT
- In force
- 40 min
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
Counties Catoosa County, GA, Dade County, GA, Walker County, GA
The radar
The Northeast Alabama radar (KHTX), 77 km from the middle of the area, began a volume at 22:23 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 |
|---|---|---|---|
| Apr 4, 6:20 PM EDT | TSTM WND DMG | 3 Wnw Morganville, GA | DADE COUNTY EMERGENCY MANAGEMENT REPORTED A DOWNED TREE IN MURPHY HOLLOW. |
| Apr 4, 6:28 PM EDT | TSTM WND DMG | 2 Ene Lookout Mountain, GA | NORTH GEORGIA EMC REPORTS POWER OUTAGES IN THEIR SERVICE AREA. |
| Apr 4, 6:30 PM EDT | TSTM WND DMG | 2 W Fort Oglethorpe, GA | WALKER COUNTY 911 REPORTS A TREE DOWNED ONTO A POWERLINE NEAR CHICKAMAUGA. |
| Apr 4, 6:30 PM EDT | TSTM WND DMG | Fort Oglethorpe, GA | CATOOSA COUNTY 911 RELAYED REPORTS OF 4-5 DOWNED TREES IN FORT OGLETHORPE. |
| Apr 4, 6:30 PM EDT | TSTM WND DMG | Rossville, GA | WALKER COUNTY 911 RELAYED REPORTS OF A DOWNED POWERLINE NEAR ROSSVILLE. |
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 |
|---|---|---|---|
| Apr 4, 5:55 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.3 hours before the alert went out and 179 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2372 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 224 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
159
WUUS52 KFFC 042220
SVRFFC
GAC047-083-295-042300-
/O.NEW.KFFC.SV.W.0104.110404T2220Z-110404T2300Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
620 PM EDT MON APR 4 2011
THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CATOOSA COUNTY IN NORTHWEST GEORGIA
DADE COUNTY IN NORTHWEST GEORGIA
NORTHWESTERN WALKER COUNTY IN NORTHWEST GEORGIA
* UNTIL 700 PM EDT
* AT 614 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP
TO 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM CHATTANOOGA IN TENNESSEE TO RISING FAWN...MOVING EAST AT 40
MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FORT
OGLETHORPE...CHICKAMAUGA AND RINGGOLD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TUESDAY MORNING
FOR NORTHERN GEORGIA.
&&
LAT...LON 3499 8498 3497 8498 3497 8500 3494 8500
3489 8504 3468 8531 3467 8536 3465 8553
3465 8554 3493 8561 3499 8560
TIME...MOT...LOC 2218Z 258DEG 35KT 3509 8521 3491 8546
3466 8580
$$1 follow-up statement
129
WWUS52 KFFC 042257
SVSFFC
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
657 PM EDT MON APR 4 2011
GAC047-083-295-042305-
/O.EXP.KFFC.SV.W.0104.000000T0000Z-110404T2300Z/
WALKER GA-CATOOSA GA-DADE GA-
657 PM EDT MON APR 4 2011
...THE SEVERE THUNDERSTORM WARNING FOR DADE...CATOOSA AND
NORTHWESTERN WALKER COUNTIES WILL BE ALLOWED TO EXPIRE AT 700 PM
EDT...
AT 651 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUES TO
INDICATE A LINE OF STRONG TO SEVERE THUNDERSTORMS CAPABLE OF
PRODUCING DAMAGING WINDS UP TO 60 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 18 MILES NORTHEAST OF SALEM TO SALEM TO
CEDAR GROVE...MOVING EAST AT 40 MPH.
THIS PARTICULAR AREA OF STORMS HAS BEEN WEAKENING...WITH THE
STRONGEST PART NOW MOVING INTO SOUTHERN TENNESSEE.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
RINGGOLD...ROCK SPRING...LINWOOD...NOBLE AND BEAUMONT.
IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER THE STORM HAS PASSED...AND THEN CALL THE NATIONAL WEATHER
SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TUESDAY MORNING
FOR NORTHERN GEORGIA. ADDITIONAL STRONG TO SEVERE STORMS WILL BE
APPROACHING FROM NORTHEAST ALABAMA WITHIN THE NEXT HOUR.
LAT...LON 3499 8498 3497 8498 3497 8500 3494 8500
3489 8504 3468 8531 3467 8536 3465 8553
3465 8554 3493 8561 3499 8560
TIME...MOT...LOC 2255Z 258DEG 35KT 3516 8478 3498 8503
3474 8537
$$
19The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 5:44 PM EDT | Severe Thunderstorm Warning | FFC | Dade, Walker | 31 min |
Nearby
Severe Thunderstorm Warnings in Georgia, 2011Every severe thunderstorm warning in 2011
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.