Alert archive / Georgia / Special Weather Statements in 2018

Special Weather Statement, NWS Atlanta, GA

June 23, 2018Coweta County, Fayette County, Georgia

NWS Atlanta, GA issued this special weather statement at Jun 23, 2018, 3:06 AM EDT for Coweta County, Fayette County, Georgia. It was in force for 24 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 23, 2018, 3:06 AM EDT (07:06 UTC)
Expired
Jun 23, 2018, 3:30 AM EDT
In force
24 min
Issued by
NWS Atlanta, GA
Wind
40

Counties Coweta County, GA, Fayette County, GA

The radar

The Atlanta radar (KFFC), 7 km from the middle of the area, began a volume at 07:09 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, 7.1 hours before the alert went out and 9 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, Peachtre/Fal Fld, GA at 00:00Z on 2018-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 402 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, Peachtre/Fal Fld, GA at 00:00Z on 2018-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
402 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
1128 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.4

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 22, 7:25 PM EDT, 7 hours 41 minutes earlier.

Area forecast discussion, Jun 22, 7:25 PM EDT, 7 hours 41 minutes before
Area Forecast Discussion
National Weather Service Peachtree City GA
725 PM EDT Fri Jun 22 2018

.UPDATE...
Evening convection is ongoing and should continue for the next
several hours. Do think activity could continue until 9-10pm
before really diminishing in coverage/strength. Have kept thunder
in for the entire overnight period. Updated some of the hourly
temp/dew grids.

&&

.PREV DISCUSSION... /Issued 329 PM EDT Fri Jun 22 2018/

SHORT TERM /Tonight through Saturday Night/...

The closed upper low over the OH Valley will drift slowly northeast
into the Great Lakes area on Saturday and weaken. North and central
GA will remain in a broad trough through tonight...with the upper
flow becoming more zonal on Saturday. Weak impulses will persist and
rotate around the trough. The air mass will continue to destabilize
and showers and thunderstorms will continue to develop and move
across the area through this evening.  The convection today and
tomorrow will be enhanced by diurnal heating but expect some storms
to linger overnight...mainly north and west. Moderate instability
this afternoon should support a few strong to severe storms with
damaging wind and hail possible. Otherwise not as hot mainly north
and west due to more clouds...but much of central GA will still
reach into the low and mid 90s with overall fewer clouds and lower
chances for thunderstorms. Heat index values will remain below
advisory criteria tomorrow.

41

LONG TERM /Sunday through Friday/...

Only tweaks to the long term based on the latest guidance.

BDL

PREVIOUS DISCUSSION...
Not much change in the over all pattern for the next 7 days.
North and Central GA stays in West to northwesterly upper level
flow through the middle of next week. This will allow waves and
moisture to continue to move across the area keeping the
Southeastern U.S. convectively active through the period. Still
expecting mainly diurnally driven storms each day as
instabilities peak everyday between 18z-00z across the CWA. The
airmass is also expected to stay fairly moist with PWs in the 1.5
to 1.9 inch range through day 7 as well. Temperatures remain warm
through the weekend and into next week. With dewpoints in the 70s
and above normal temperatures, heat index values will creep into
the lower 100s almost every day, especially over portions of
central and eastern Georgia. Although we are not anticipating
having to issue any heat advisories...those spending prolonged
periods outdoors should take frequent breaks and drink plenty of
water.

01

&&

.AVIATION...
00Z Update...
Thunderstorms should continue to impact the airports for the next
couple of hours. Do think activity should start to diminish in
coverage/strength between 9-10pm. Storms have contained gusty
winds and do think 25-30kt is not out of the question. Not
confident that IFR clouds will develop overnight, but have put in
a sct IFR deck. Winds (outside of thunderstorms) should remain on
the west side.

//ATL Confidence...00Z Update...
Med confidence all elements.

NListemaa

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          70  89  72  94 /  50  50  10  20
Atlanta         72  90  74  92 /  50  50  20  20
Blairsville     64  83  67  86 /  40  50  30  40
Cartersville    70  87  72  92 /  50  60  20  30
Columbus        75  93  75  94 /  60  50  10  10
Gainesville     70  86  72  90 /  40  50  20  30
Macon           74  93  74  96 /  60  50  10  20
Rome            69  87  72  92 /  60  60  20  30
Peachtree City  72  91  73  93 /  60  50  10  20
Vidalia         75  94  76  97 /  40  30  10  20

&&

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

SHORT TERM...NListemaa
LONG TERM....BDL
AVIATION...NListemaa
Hazardous weather outlook, Jun 22, 11:08 PM EDT, 3 hours 58 minutes before
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In the hours before

Local storm report, Jun 22, 10:44 PM EDT, 4 hours 22 minutes before
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Local storm report, Jun 22, 10:46 PM EDT, 4 hours 20 minutes before
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Special weather statement, Jun 22, 11:15 PM EDT, 3 hours 51 minutes before
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Special weather statement, Jun 23, 1:31 AM EDT, 1 hour 35 minutes before
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Special weather statement, Jun 23, 2:27 AM EDT, 39 minutes before
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Special weather statement, Jun 23, 3:06 AM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 8:01 PM EDTSevere Thunderstorm WarningFFCChattahoochee, Harris, Muscogee29 min
Jun 22, 8:08 PM EDTSpecial Weather StatementFFCMorgan, Newton52 min
Jun 22, 8:23 PM EDTSpecial Weather StatementFFCTaylor52 min
Jun 22, 8:37 PM EDTSpecial Weather StatementFFCChattooga, Walker53 min
Jun 22, 8:40 PM EDTSpecial Weather StatementFFCBaldwin, Bibb, Jones, Monroe50 min
Jun 22, 8:54 PM EDTSpecial Weather StatementFFCGreene51 min
Jun 22, 9:06 PM EDTSevere Thunderstorm WarningFFCCrawford, Houston, Macon, Peach, Taylor39 min
Jun 22, 9:23 PM EDTSpecial Weather StatementFFCBartow, Floyd, Gordon52 min
Jun 22, 9:28 PM EDTSpecial Weather StatementFFCBaldwin, Wilkinson47 min
Jun 22, 9:45 PM EDTSpecial Weather StatementFFCTwiggs30 min
Jun 22, 9:53 PM EDTSevere Thunderstorm WarningFFCBartow, Floyd22 min
Jun 22, 10:05 PM EDTSpecial Weather StatementFFCGlascock, Jefferson40 min
Jun 22, 10:40 PM EDTSpecial Weather StatementFFCJefferson, Johnson50 min
Jun 22, 11:15 PM EDTSpecial Weather StatementFFCEmanuel, Johnson45 min
Jun 23, 1:31 AM EDTSpecial Weather StatementFFCTroup29 min
Jun 23, 2:27 AM EDTSpecial Weather StatementFFCMeriwether, Pike33 min
Jun 23, 1:26 PM EDTSpecial Weather StatementFFCDade, Walker49 min
Jun 23, 1:32 PM EDTSevere Thunderstorm WarningFFCCatoosa, Dade, Walker43 min
Jun 23, 1:48 PM EDTSpecial Weather StatementFFCWashington27 min
Jun 23, 2:02 PM EDTSevere Thunderstorm WarningFFCCatoosa, Gordon, Murray, Walker, Whitfield43 min
Jun 23, 2:16 PM EDTSpecial Weather StatementFFCJefferson29 min
Jun 23, 2:37 PM EDTSevere Thunderstorm WarningFFCFannin, Gilmer, Murray38 min
Jun 23, 2:39 PM EDTSpecial Weather StatementFFCBibb51 min
Jun 23, 2:45 PM EDTSpecial Weather StatementFFCJohnson45 min
Jun 23, 3:14 PM EDTSevere Thunderstorm WarningFFCFannin, Gilmer, Lumpkin, Towns, Union, White46 min
Jun 23, 3:37 PM EDTSpecial Weather StatementFFCEmanuel38 min
Jun 23, 3:39 PM EDTSpecial Weather StatementFFCJohnson51 min
Jun 23, 4:13 PM EDTSpecial Weather StatementFFCMontgomery, Treutlen47 min
Jun 23, 5:09 PM EDTSpecial Weather StatementFFCHaralson36 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.