Alert archive / Georgia / Special Weather Statements in 2018

Special Weather Statement, NWS Atlanta, GA

September 29, 2018Upson County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 29, 2018, 6:42 PM EDT for Upson County, Georgia. It was in force for 63 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 29, 2018, 6:42 PM EDT (22:42 UTC)
Expired
Sep 29, 2018, 7:45 PM EDT
In force
63 min
Issued by
NWS Atlanta, GA

County Upson County, GA

The radar

The Atlanta radar (KFFC), 72 km from the middle of the area, began a volume at 22:46 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.7 hours before the alert went out and 265 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, Tallahassee Rgnl, FL at 12:00Z on 2018-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 406 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, Tallahassee Rgnl, FL at 12:00Z on 2018-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939Sfc1 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
406 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
1085 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
51 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 Sep 29, 2:56 PM EDT, 3 hours 46 minutes earlier.

Area forecast discussion, Sep 29, 2:56 PM EDT, 3 hours 46 minutes before
Area Forecast Discussion
National Weather Service Peachtree City GA
256 PM EDT Sat Sep 29 2018

.SHORT TERM /Tonight through Sunday Night/...
A stationary front across the central to s GA area has allowed for
showers and thunderstorms across mainly central GA this afternoon
with mainly just small chances for portions of n GA. Shower and storm
chances are expected to decrease during the evening.
With easterly flow increasing over the area small shower chances
will continue for mainly the eastern portion of the forecast
area.

Plenty of moisture is forecast over the area for Sunday and showers
and thunderstorms are expected to flare up with chances peaking in
the afternoon to early evening, then diminishing. The highest pops
will favor central GA where the greatest instability is forecast.

Forecast low temperatures are running around 10 degrees above normal
tonight and around 7 to 9 degrees above normal Sunday night.
Forecast high temperatures are near to slight above normal on Sunday.

Overall confidence is medium.

BDL

.LONG TERM /Monday through Saturday/...
No major changes to the long term. High pressure builds over the
southeast U.S. turning the heat back on over the CWA. Moisture
associated with the decaying cold front returns early in the long
term bringing the chance of showers/tstorms back to north GA but as
the high builds over the CWA, the diurnally driven convection will
slowly come to an end making for a dry end of the week and into next
weekend. Temperatures continue to run warmer than MOS Guide, so have
raised temps a degree or two for max temps through the long term.
17

&&

.AVIATION... 18Z Update...
Mainly VFR conditions this afternoon with showers and storms most
likely across portions of central GA and lesser chances to the N.
Potential for IFR/MVFR ceilings and fog late tonight and Sunday
morning improving to VFR through the day with potential for more
showers and storms. Surface winds highly variable this afternoon
less than 10 kts becoming ENE late day or this evening.

//ATL Confidence...18 Update...
Low to medium confidence for wind direction to start then
 high confidence by evening.
Low confidence for showers/storms affecting the airfield this
 afternoon.
Low to medium confidence for ceilings.
Medium confidence for vsbys late tonight/early Sunday.

BDL

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          68  81  65  83 /  20  30  20  10
Atlanta         70  82  69  83 /  20  40  30  20
Blairsville     62  77  61  77 /  20  20  20  20
Cartersville    68  83  68  84 /  10  30  20  20
Columbus        71  86  71  86 /  20  60  40  30
Gainesville     68  79  66  80 /  20  30  20  20
Macon           70  84  68  86 /  40  50  40  20
Rome            66  83  67  84 /  10  30  20  20
Peachtree City  69  83  67  84 /  20  40  40  20
Vidalia         72  85  70  86 /  50  60  30  30

&&

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

SHORT TERM...BDL
LONG TERM....17
AVIATION...BDL
Hazardous weather outlook, Sep 29, 5:22 AM EDT, 13 hours 20 minutes before
Hazardous Weather Outlook
National Weather Service Peachtree City GA
522 AM EDT Sat Sep 29 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-300930-
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-
522 AM EDT Sat Sep 29 2018

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

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

Isolated to scattered thunderstorms are expected mainly over
central Georgia this afternoon into tonight. Isolated storms
will be capable of producing gusty winds, frequent lightning
and locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...Sunday through Friday...

Scattered showers and thunderstorms are expected Sunday through
Tuesday before drier air works into the area for the end of the
period. A few strong storms will be possible with gusty winds,
frequent lightning and locally heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

In the hours before

Special weather statement, Sep 29, 4:48 PM EDT, 1 hour 54 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
448 PM EDT SAT SEP 29 2018

GAZ108-292115-
Wilcox GA-
448 PM EDT SAT SEP 29 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WILCOX COUNTY UNTIL
515 PM EDT...

At 448 PM EDT...a strong thunderstorm was near Double Run, or 13
miles southwest of Abbeville...moving southeast at 15 mph.

  HAZARD...Winds 40 to 50 mph...pea sized hail...frequent 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
Rochelle, Pitts, Double Run and Owensboro.

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 3185 8359 3194 8361 3196 8340 3185 8335
TIME...MOT...LOC 2048Z 331DEG 12KT 3189 8351

HAIL...0.25IN
WIND...50MPH
Special weather statement, Sep 29, 4:51 PM EDT, 1 hour 51 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
451 PM EDT SAT SEP 29 2018

GAZ096-107-109-292115-
Bleckley GA-Dodge GA-Pulaski GA-
451 PM EDT SAT SEP 29 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BLECKLEY...WESTERN
DODGE AND PULASKI COUNTIES UNTIL 515 PM EDT...

At 451 PM EDT...a strong thunderstorm was over Hartford, or over
Hawkinsville...moving southeast at 10 mph.

  HAZARD...Winds up to 40 mph...pea sized hail...frequent 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
Hawkinsville, Dubois, Paulk, Empire, Mobley Crossing, Hartford,
Pulaski State Prison, Baileys Park and Gresston.

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 3231 8351 3239 8340 3232 8326 3218 8323
      3215 8347
TIME...MOT...LOC 2051Z 318DEG 7KT 3226 8344

HAIL...0.25IN
WIND...40MPH
Special weather statement, Sep 29, 5:34 PM EDT, 1 hour 8 minutes before
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Special weather statement, Sep 29, 5:46 PM EDT, 56 minutes before
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Special weather statement, Sep 29, 6:31 PM EDT, 11 minutes before
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Special weather statement, Sep 29, 6:42 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 29, 2:44 PM EDTSpecial Weather StatementFFCGlascock46 min
Sep 29, 4:14 PM EDTSpecial Weather StatementFFCDooly, Houston, Wilcox61 min
Sep 29, 4:22 PM EDTSevere Thunderstorm WarningFFCWilcox38 min
Sep 29, 4:48 PM EDTSpecial Weather StatementFFCWilcox27 min
Sep 29, 4:51 PM EDTSpecial Weather StatementFFCPulaski24 min
Sep 29, 5:08 PM EDTSevere Thunderstorm WarningFFCWilcox37 min
Sep 29, 5:34 PM EDTSpecial Weather StatementFFCCrawford26 min
Sep 29, 5:46 PM EDTSpecial Weather StatementFFCWilcox29 min
Sep 29, 5:53 PM EDTSevere Thunderstorm WarningFFCDodge, Telfair, Wilcox37 min
Sep 29, 6:31 PM EDTSpecial Weather StatementFFCCrawford59 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.