Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Atlanta, GA

April 3, 2015Floyd County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 3, 2015, 10:52 PM EDT for Floyd County, Georgia. It was in force for 38 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: Apr 3, 2015, 10:52 PM EDT (02:52 UTC)
Expired: Apr 3, 2015, 11:30 PM EDT
In force: 38 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Floyd County, GA

The radar

The Northeast Alabama radar (KHTX), 109 km from the middle of the area, began a volume at 02:52 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 3, 8:48 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.9 hours before the alert went out and 120 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2692 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 108 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.

017 
WUUS52 KFFC 040252
SVRFFC
GAC115-040330-
/O.NEW.KFFC.SV.W.0021.150404T0252Z-150404T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1052 PM EDT FRI APR 3 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FLOYD COUNTY IN NORTHWESTERN GEORGIA...

* UNTIL 1130 PM EDT

* AT 1051 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES EAST OF
  BLANCHE...OR 8 MILES EAST OF LITTLE RIVER CANYON NATIONAL
  PRESERVE...MOVING SOUTHEAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ROME...SHANNON...COOSA...ARMUCHEE...LINDALE AND PINSON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

INTENSE THUNDERSTORM LINES CAN PRODUCE BRIEF TORNADOES AND WIDESPREAD
SIGNIFICANT WIND DAMAGE. ALTHOUGH A TORNADO IS NOT IMMEDIATELY
LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A BUILDING. THIS STORM MAY CAUSE SERIOUS INJURY AND SIGNIFICANT
PROPERTY DAMAGE.

IF YOU SEE WIND DAMAGE...HAIL OR 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 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

LAT...LON 3429 8539 3433 8537 3437 8533 3441 8522
      3445 8517 3444 8510 3441 8510 3439 8501
      3430 8502 3426 8502 3425 8501 3425 8502
      3421 8502 3421 8505 3410 8505 3409 8512
      3421 8545 3428 8546
TIME...MOT...LOC 0251Z 295DEG 37KT 3439 8548 

HAIL...<.75IN
WIND...60MPH
 
$$

16

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 3, 9:34 PM EDT	Severe Thunderstorm Warning	FFC	Dade	41 min
Apr 3, 9:47 PM EDT	Special Weather Statement	FFC	Catoosa	28 min
Apr 3, 10:13 PM EDT	Tornado Warning	FFC	Chattooga, Dade, Walker	36 min
Apr 3, 10:38 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga, Walker	22 min
Apr 3, 10:43 PM EDT	Special Weather Statement	FFC	Gordon	32 min
Apr 3, 11:04 PM EDT	Special Weather Statement	FFC	Gordon	26 min
Apr 3, 11:25 PM EDT	Special Weather Statement	FFC	Bartow	35 min
Apr 3, 11:58 PM EDT	Special Weather Statement	FFC	Cobb	32 min
Apr 4, 12:26 AM EDT	Special Weather Statement	FFC	Cobb	34 min
Apr 4, 12:42 AM EDT	Special Weather Statement	FFC	Carroll	33 min
Apr 4, 1:13 AM EDT	Special Weather Statement	FFC	Carroll	32 min
Apr 4, 2:31 PM EDT	Frost Advisory	FFC	Bartow, Catoosa, Chattooga, Cherokee, Dade, Dawson and 13 more	18 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning in 2015

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.