Alert archive / Georgia / Special Weather Statements in 2020

Special Weather Statement, NWS Atlanta, GA

March 29, 2020Catoosa County, Dade County, Walker County, Georgia

NWS Atlanta, GA issued this special weather statement at Mar 29, 2020, 5:06 AM EDT for Catoosa County, Dade County, Walker County, Georgia. It was in force for 39 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: Mar 29, 2020, 5:06 AM EDT (09:06 UTC)
Expired: Mar 29, 2020, 5:45 AM EDT
In force: 39 min
Issued by: NWS Atlanta, GA
Wind: 50

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 09:09 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 9.1 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.

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: 92 J/kg
Mixed-layer CIN: -298 J/kg
Mixed-layer LCL: 1626 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this special weather statement went out at Mar 29, 3:18 AM EDT, 1 hour 48 minutes earlier.

Area forecast discussion, Mar 29, 3:18 AM EDT, 1 hour 48 minutes before

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Hazardous weather outlook, Mar 28, 10:17 PM EDT, 6 hours 49 minutes before

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In the hours before

Special weather statement, Mar 29, 5:06 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
506 AM EDT Sun Mar 29 2020

GAZ001>003-290945-
Catoosa GA-Walker GA-Dade GA-
506 AM EDT Sun Mar 29 2020

...SIGNIFICANT WEATHER ADVISORY FOR CATOOSA...WALKER AND DADE
COUNTIES UNTIL 545 AM EDT...

At 506 AM EDT...a line of strong thunderstorms was along a line
extending from Haletown (guild) to near Flat Rock to near Section...
and moving east at 55 mph.

  HAZARD...40 to 50 mph wind...frequent cloud to ground lightning
           and heavy rain.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects. Heavy rain may cause temporary
           street flooding especially in poor drainage areas.

Some locations in the path of these storms include
Ringgold, Trenton, Fort Oglethorpe, Rossville, Chickamauga, Lookout
Mountain, Blue Spring, Fairview, Chattanooga  Valley, Hooker,
Cloudland Canyon State Park, Cooper Heights, Rock Spring, Rising
Fawn, Noble, Lakeview, Indian Springs, Graysville, Cole City and
Wildwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3499 8503 3498 8503 3491 8508 3459 8542
      3459 8553 3498 8560
TIME...MOT...LOC 0906Z 255DEG 48KT 3502 8556 3477 8573 3455 8597

WIND...50MPH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 6:23 AM EDT	Special Weather Statement	FFC	Chattooga, Floyd	37 min
Mar 29, 6:54 AM EDT	Special Weather Statement	FFC	Fannin, Gilmer, Gordon, Murray	36 min
Mar 29, 7:12 AM EDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer	33 min
Mar 29, 7:33 AM EDT	Special Weather Statement	FFC	Towns, Union	42 min

Nearby

Special Weather Statements in Georgia, 2020 Every special weather statement in 2020

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.