Alert archive / Georgia / Special Weather Statements in 2018

Special Weather Statement, NWS Atlanta, GA

June 15, 2018Clayton County, Georgia

NWS Atlanta, GA issued this special weather statement at Jun 15, 2018, 5:46 PM EDT for Clayton County, Georgia. It was in force for 29 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: Jun 15, 2018, 5:46 PM EDT (21:46 UTC)
Expired: Jun 15, 2018, 6:15 PM EDT
In force: 29 min
Issued by: NWS Atlanta, GA
Wind: 40

County Clayton County, GA

The radar

The Atlanta radar (KFFC), 29 km from the middle of the area, began a volume at 21:46 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 12:00Z, 9.8 hours before the alert went out and 28 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: 976 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jun 15, 2:56 PM EDT, 2 hours 50 minutes earlier.

Area forecast discussion, Jun 15, 2:56 PM EDT, 2 hours 50 minutes before

Area Forecast Discussion
National Weather Service Peachtree City GA
256 PM EDT Fri Jun 15 2018

.SHORT TERM /Tonight through Saturday Night/...
Another hot and humid day across north/central GA as a weak boundary
is currently draped in the SE. Aloft, very weak flow continues with
mid/upper level ridging across much of the south.  This will result
in widely scattered showers and thunderstorm development this
afternoon/early evening.  Feel the best coverage for precipitation
will be south of I-20 and across the higher terrain in NE GA with
slightly better PWATs and instability. With these storms we can
expect gusty winds and heavy rain. Given the weak flow in place, the
storm motion will be minimal with localized flooding a possibility.
Any thunderstorm activity may linger into the evening, but should
diminish overnight. Some fog and stratus is possible in the morning,
especially in areas that received precipitation this
afternoon/evening. Clear and calm conditions expected through most
of the overnight. A similar set up for tomorrow, although with the
boundary across the region becoming more washed out, we anticipate
coverage of storms to be more widespread. Convection will again
diminish during the evening hours.

Temperatures are expected to be AOA climo through the period.
Saturday highs will top out in the upper 80s to low 90s area wide,
apart from cooler temperatures in the higher terrain.

26

.LONG TERM /Sunday through Friday/...
Looks like we are in a continued pattern of diurnally driven
convection through day 7. The extended starts off Sunday with decent
afternoon storm potential given a lingering weakening upper low
centered across AL. By Sun this low/wave and associated enhanced
Gulf moisture is expected to move a bit further Northward across AL
and western portions of GA. This will be definitely help to enhance
convective potential across the southeastern U.S. The fly in the
ointment is still the broad upper ridge which looks to build in from
the west and should help to limit overall coverage of showers and
storms Sunday through Thursday. This ridge will not completely
suppress development as there will be enough daytime heating and
available instability to still trigger some isolated to scattered
convection. Have generally continued some slight to chance pops for
portions of the area through day 7. High temps expected to stay in
the low 90s across the area with lows in the 70s through the
extended.

01

&&

.AVIATION...
18Z Update...
VFR conditions to start the TAF period as CU decks develop this
afternoon around 4Kft. Scattered thunderstorms possible, mainly
across MCN/CSG. Winds while light will be out of the east across
the northern TAF sites; occasionally becoming westerly. Clear
skies overnight and calm conditions. Some fog/stratus possible
across CSG Saturday morning. CU development again by late morning
around 4Kft with scattered thunderstorms possible area wide for
Saturday. Winds will back to the SE.

//ATL Confidence...18Z Update...
Low confidence on wind direction this afternoon.
Medium to High confidence on all elements.

26

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          71  91  71  92 /  20  50  30  30
Atlanta         72  89  72  90 /  30  40  30  30
Blairsville     65  87  65  87 /  20  50  30  50
Cartersville    70  91  70  91 /  20  30  30  30
Columbus        72  89  73  91 /  20  40  30  30
Gainesville     71  89  70  90 /  20  40  30  30
Macon           71  90  72  92 /  20  30  30  40
Rome            70  92  71  91 /  10  30  20  30
Peachtree City  70  89  70  90 /  30  40  30  40
Vidalia         73  91  73  92 /  30  40  40  40

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...26
LONG TERM....01
AVIATION...26

Hazardous weather outlook, Jun 15, 4:05 AM EDT, 13 hours 41 minutes before

Hazardous Weather Outlook
National Weather Service Peachtree City GA
405 AM EDT Fri Jun 15 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-161200-
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-
405 AM EDT Fri Jun 15 2018

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

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

Scattered thunderstorms can be expected this afternoon into this
evening. Better coverage is expected to be south of Interstate 20.
Some storms could be strong and an isolated severe storm cannot be
ruled out. The main threats will be isolated flooding from
locally heavy rainfall, strong damaging winds and frequent
lightning.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday...

There is a chance of thunderstorms each day, mainly during the
afternoon and evening hours. A few storms could be strong to severe
each day with strong, gusty winds, frequent lightning and isolated
flooding from heavy rain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight, but spotters
are encouraged to submit reports of any severe weather and flooding
through the web by going to weather.gov/atlanta

In the hours before

Local storm report, Jun 15, 11:51 AM EDT, 5 hours 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1151 AM EDT FRI JUN 15 2018

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

0525 PM     TSTM WND DMG     1 S MCRAE               32.06N  82.90W
06/14/2018                   TELFAIR            GA   EMERGENCY MNGR

            THE TOPS OF 2 SMALL TREES WERE BLOWN DOWN IN SE MCRAE
            ALONG POPLAR ST

&&

EVENT NUMBER FFC1800338

THIEM

Special weather statement, Jun 15, 5:38 PM EDT, 8 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
538 PM EDT FRI JUN 15 2018

GAZ009-016-152215-
Towns GA-White GA-
538 PM EDT FRI JUN 15 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN TOWNS AND NORTHERN
WHITE COUNTIES UNTIL 615 PM EDT...

At 538 PM EDT...a line of strong thunderstorms was along a line
extending from near Moccasin Creek State Park to Anna Ruby Falls...
and moving southwest at 15 mph.

  HAZARD...Up to 40 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
Helen, Unicoi State Park, Robertstown, Anna Ruby Falls, Smithgall
Woods Conservation Are, Sautee and Mountain Scene.

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 3488 8366 3483 8366 3482 8365 3480 8368
      3479 8368 3477 8365 3477 8363 3464 8367
      3470 8384 3490 8369 3490 8363
TIME...MOT...LOC 2138Z 043DEG 14KT 3488 8364 3478 8369

WIND...40MPH

Special weather statement, Jun 15, 5:46 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
546 PM EDT FRI JUN 15 2018

GAZ044-054-055-152215-
Fayette GA-Clayton GA-South Fulton GA-
546 PM EDT FRI JUN 15 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN FAYETTE...NORTHWESTERN
CLAYTON AND EASTERN SOUTH FULTON COUNTIES UNTIL 615 PM EDT...

At 546 PM EDT...a strong thunderstorm was over College Park, or 7
miles southwest of Atlanta...moving southwest at 15 mph.

  HAZARD...Up to 40 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 this storm include
Atlanta, East Point, Union City, College Park, Fairburn, Hapeville
and Hartsfield-Jackson Airport.

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 3364 8462 3370 8445 3364 8441 3350 8452
TIME...MOT...LOC 2146Z 057DEG 14KT 3365 8446

WIND...40MPH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 8:00 PM EDT	Severe Thunderstorm Warning	FFC	Bibb, Twiggs	28 min
Jun 14, 8:30 PM EDT	Special Weather Statement	FFC	Bibb	30 min
Jun 15, 5:38 PM EDT	Special Weather Statement	FFC	White	37 min
Jun 15, 5:49 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Fayette, Fulton	21 min
Jun 15, 6:29 PM EDT	Special Weather Statement	FFC	Oconee	31 min
Jun 15, 6:52 PM EDT	Special Weather Statement	FFC	Barrow	23 min
Jun 15, 7:00 PM EDT	Special Weather Statement	FFC	Douglas	30 min
Jun 15, 7:13 PM EDT	Severe Thunderstorm Warning	FFC	Taliaferro, Wilkes	47 min
Jun 15, 7:53 PM EDT	Special Weather Statement	FFC	Douglas	37 min
Jun 15, 7:57 PM EDT	Special Weather Statement	FFC	Taliaferro	33 min

Nearby

Special Weather Statements in Georgia, 2018 Every 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.