Alert archive / Georgia / Special Weather Statements in 2018

Special Weather Statement, NWS Atlanta, GA

September 24, 2018Catoosa County, Walker County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 24, 2018, 9:32 PM EDT for Catoosa County, Walker County, Georgia. It was in force for 28 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
Sep 24, 2018, 9:32 PM EDT (01:32 UTC)
Expired
Sep 24, 2018, 10:00 PM EDT
In force
28 min
Issued by
NWS Atlanta, GA
Wind
50

Counties Catoosa County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 01:33 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

Nashville Metro, TN (KBNA), launched 00:00Z, 1.5 hours before the alert went out and 195 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-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2018-09-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 366 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2018-09-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
366 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
775 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
204 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.9

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 Sep 24, 9:32 PM EDT, 0 minutes earlier.

Area forecast discussion, Sep 24, 9:32 PM EDT, 0 minutes before
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Hazardous weather outlook, Sep 24, 4:35 AM EDT, 16 hours 57 minutes before
Hazardous Weather Outlook
National Weather Service Peachtree City GA
435 AM EDT Mon Sep 24 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-250845-
Baldwin-Banks-Barrow-Bartow-Bibb-Bleckley-Butts-Carroll-Catoosa-
Chattahoochee-Chattooga-Cherokee-Clarke-Clayton-Cobb-Coweta-
Crawford-Crisp-Dade-Dawson-DeKalb-Dodge-Dooly-Douglas-Emanuel-
Fannin-Fayette-Floyd-Forsyth-Gilmer-Glascock-Gordon-Greene-
Gwinnett-Hall-Hancock-Haralson-Harris-Heard-Henry-Houston-Jackson-
Jasper-Jefferson-Johnson-Jones-Lamar-Laurens-Lumpkin-Macon-
Madison-Marion-Meriwether-Monroe-Montgomery-Morgan-Murray-
Muscogee-Newton-North Fulton-Oconee-Oglethorpe-Paulding-Peach-
Pickens-Pike-Polk-Pulaski-Putnam-Rockdale-Schley-South Fulton-
Spalding-Stewart-Sumter-Talbot-Taliaferro-Taylor-Telfair-Toombs-
Towns-Treutlen-Troup-Twiggs-Union-Upson-Walker-Walton-Warren-
Washington-Webster-Wheeler-White-Whitfield-Wilcox-Wilkes-
Wilkinson-
435 AM EDT Mon Sep 24 2018

This Hazardous Weather Outlook is for portions of North and Central Georgia.

.DAY ONE...Today and Tonight...

Scattered thunderstorms are expected today with highest chances
across the northwest corner of the area. A few strong storms will be
possible each day with gusty winds, frequent lightning and
locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday...

Scattered to numerous showers and thunderstorms are
expected daily through the week. A few strong storms will be
possible with gusty winds, frequent lightning and locally heavy
rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested but spotters are encouraged
to submit reports of severe weather through the web by going to
weather.gov/atlanta.

In the hours before

Local storm report, Sep 24, 5:44 PM EDT, 3 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
544 PM EDT MON SEP 24 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 PM     FLASH FLOOD      2 WSW RINGGOLD          34.90N  85.14W
09/24/2018                   CATOOSA            GA   EMERGENCY MNGR

            ROAD CLOSED DUE TO FLOODING ON POPLAR SPRINGS RD AT
            INTERSRCTION WITH BONNER RD.

&&

EVENT NUMBER FFC1800848

KING
Local storm report, Sep 24, 5:46 PM EDT, 3 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
546 PM EDT MON SEP 24 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 PM     FLASH FLOOD      2 ESE BOYNTON           34.91N  85.15W
09/24/2018                   CATOOSA            GA   EMERGENCY MNGR

            HOLCOMB RD CLOSED IN TWO DIFFERENT LOCATIONS DUE TO
            FLOODING.

&&

EVENT NUMBER FFC1800849

KING
Special weather statement, Sep 24, 8:39 PM EDT, 53 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
839 PM EDT MON SEP 24 2018

GAZ011-250115-
Chattooga GA-
839 PM EDT MON SEP 24 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN CHATTOOGA COUNTY UNTIL
915 PM EDT...

At 839 PM EDT...National Weather Service doppler radar indicated a
strong thunderstorm over Broomtown, or near Little River Canyon
National Preserve...moving northeast at 30 mph.

  HAZARD...40 to 50 mph wind and enhanced risk of a brief tornado.

  IMPACT...While winds should result in minor damage to tree limbs
           and blowing around of light...unsecured objects...this
           storm has also exhibited localized rotation. A brief
           tornado could quickly form.

Some locations in the path of this storm include
Summerville, Lyerly, Menlo, Cloudland, Berryton, Chattoogaville,
James H. Floyd State Park and Holland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately.

LAT...LON 3444 8525 3437 8532 3437 8534 3433 8537
      3429 8541 3429 8546 3458 8552
TIME...MOT...LOC 0039Z 211DEG 24KT 3435 8552

WIND...50MPH
Special weather statement, Sep 24, 9:01 PM EDT, 31 minutes before
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Special weather statement, Sep 24, 9:11 PM EDT, 21 minutes before
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Special weather statement, Sep 24, 9:32 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 24, 8:39 PM EDTSpecial Weather StatementFFCChattooga36 min
Sep 24, 9:01 PM EDTSpecial Weather StatementFFCChattooga, Walker29 min
Sep 24, 9:11 PM EDTSpecial Weather StatementFFCDade34 min
Sep 24, 9:34 PM EDTSpecial Weather StatementFFCDade41 min
Sep 24, 10:01 PM EDTSpecial Weather StatementFFCCatoosa29 min
Sep 24, 10:05 PM EDTSpecial Weather StatementFFCCarroll25 min
Sep 24, 10:16 PM EDTSpecial Weather StatementFFCBartow29 min
Sep 24, 10:36 PM EDTSpecial Weather StatementFFCBartow, Douglas, Paulding24 min
Sep 24, 10:45 PM EDTSpecial Weather StatementFFCGordon30 min
Sep 24, 11:07 PM EDTSpecial Weather StatementFFCBartow, Douglas, Paulding23 min
Sep 24, 11:35 PM EDTFlash Flood WarningFFCGordon, Murray, Walker, Whitfield3 hr
Sep 24, 11:39 PM EDTSpecial Weather StatementFFCBartow, Cherokee36 min
Sep 25, 12:34 AM EDTSpecial Weather StatementFFCPaulding41 min
Sep 25, 1:42 AM EDTSpecial Weather StatementFFCCobb48 min
Sep 25, 10:54 AM EDTRiver Flood WarningFFCWhitfield4 days
Sep 25, 5:42 PM EDTSpecial Weather StatementFFCStewart33 min
Sep 25, 5:58 PM EDTSpecial Weather StatementFFCChattahoochee32 min
Sep 25, 6:32 PM EDTSpecial Weather StatementFFCMuscogee28 min

Nearby

Special Weather Statements in Georgia, 2018Every special weather statement in 2018

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.