Alert archive / Georgia / Special Weather Statements in 2016

Special Weather Statement, NWS Atlanta, GA

July 21, 2016Polk County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 21, 2016, 11:09 PM EDT for Polk County, Georgia. It was in force for 36 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: Jul 21, 2016, 11:09 PM EDT (03:09 UTC)
Expired: Jul 21, 2016, 11:45 PM EDT
In force: 36 min
Issued by: NWS Atlanta, GA

County Polk County, GA

The radar

The Atlanta radar (KFFC), 104 km from the middle of the area, began a volume at 03:09 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, 3.2 hours before the alert went out and 108 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: 202 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 1656 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

016 
WWUS82 KFFC 220309
SPSFFC

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1109 PM EDT THU JUL 21 2016
 
GAZ019-030-220345-
POLK GA-FLOYD GA-
1109 PM EDT THU JUL 21 2016

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN POLK AND SOUTHWESTERN
FLOYD COUNTIES UNTIL 1145 PM EDT...

AT 1108 PM EDT...A STRONG THUNDERSTORM WAS NEAR FORNEY...MOVING SOUTH
AT 15 MPH.

  HAZARD...UP TO 40 MPH WIND...FREQUENT CLOUD TO GROUND LIGHTNING 
           AND HEAVY RAIN. 

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT 
           MINOR DAMAGE TO TREE LIMBS AND BLOWING AROUND OF 
           LIGHT...UNSECURED OBJECTS. LIGHTNING IS ONE OF NATURE'S 
           LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU 
           ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. ELECTRICAL 
           APPLIANCES SHOULD NOT BE USED UNLESS IN AN EMERGENCY. 
           MOTORISTS SHOULD SLOW DOWN AND BE PREPARED FOR POSSIBLE 
           LOSS OF CONTROL DUE TO HYDROPLANING. ALSO...THE HEAVY 
           RAIN MAY CAUSE TEMPORARY STREET FLOODING OR ROAD PONDING 
           IN SLOW DRAINAGE AREAS. WHEN WATER COVERS THE 
           ROAD...REMEMBER TO TURN AROUND DON'T DROWN. 

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
CAVE SPRING...ESOM HILL AND ETNA. 

LAT...LON 3416 8528 3390 8531 3390 8536 3391 8539
      3420 8544
TIME...MOT...LOC 0308Z 016DEG 15KT 3412 8541 

$$

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 Jul 21, 9:37 PM EDT, 1 hour 32 minutes earlier.

Area forecast discussion, Jul 21, 9:37 PM EDT, 1 hour 32 minutes before

Area Forecast Discussion
National Weather Service Peachtree City GA
937 PM EDT THU JUL 21 2016

.UPDATE...
Most of the CWFA has been worked over pretty well, but have seen
some additional development in the extreme NW where storms were
sparse earlier today. Do think convection could last until
midnight or shortly afternoon. Strong storms are possible, but
think the potential for severe has diminished.

&&

.PREV DISCUSSION... /Issued 738 PM EDT THU JUL 21 2016/

PREV DISCUSSION... /Issued 231 PM EDT THU JUL 21 2016/

SHORT TERM /Tonight through Friday Night/...
Morning sounding shows a very moist and unstable airmass... with
1.72 pw's and around 4000-4500 J/KG of afternoon mucape. This
coupled with an active northerly flow aloft is already producing
scattered showers and thunderstorms across much of North GA and
Central GA. Expect coverage to increase through the afternoon
hours... with many storms becoming strong to severe... especially
between 2 PM and 10 PM today. SPC continues to show a Marginal Risk
for the state. The main threats this afternoon and evening will be
frequent lightning... locally heavy rain... pea to quarter sized
hail and the greater concern of 40-60+ mph downburst winds... which
could down trees and power lines. The severe storm threat should
greatly diminish by 9-10 pm with loss of daytime heating.

Expect a quiet but muggy overnight... as wet grounds... light winds
and near 100 percent humidity result in some patchy fog toward early
Friday morning. Models agree on the upper ridge centered over TX/OK
building eastward and helping to suppress storm development on
Friday. This coupled with active convection today also supports a
quieter convective day on Friday as the air mass will need a day to
recharge. With all this said... still cannot rule out isolated
storms on Friday during peak heating... warranting 20-30 percent
chance pops across the area Friday afternoon-early evening. NIL pops
looks good by midnight tonight... then by 10 pm on Friday.

Otherwise... leaned toward persistence for lows and took a mav and
met blend for highs on Friday. Also... increased pops significantly
for this afternoon and evening... then near guidance for expected
less coverage on Friday.

39

LONG TERM /Saturday through Thursday/...
Persistent high pressure ridge will remain over the central U.S.
into next week with Georgia along the eastern periphery in the
north/northwest flow. Have continued slight to chance pops through
the extended for afternoon/evening diurnal convection resulting
from varying amounts of moisture over the state each day. Not many
changes were made to the extended forecast aside from minor
updates to account for latest model trends and for neighbor
consistency. Previous forecast discussion follows.

31

/Issued at 414 AM EDT THU JUL 21 2016/
A very stagnant pattern remains into the extended forecast with
not much change expected anytime soon. Large east to west oriented
upper ridge stays centered over the central and southern plains
and continues to be the main focus in this weather pattern. This
ridge does weaken a bit and becomes even more elongated (west to
east) through the end of next week...but it continues to direct
the over all flow around the central and mid-south states through
day 7. Moisture continues to rotate around the periphery of the
ridge with slight/chance pops expected everyday across North and
Central Georgia. Looking a bit past day 7...not seeing any drying
trends setting up so it appears we are in this diurnal precip
pattern for a while. There are also no signs of tropical
development in Atlantic basin. Temps also stay warm in the
extended with daytime highs mainly in the 90s and nighttime lows
in the upper 60s and 70s.

01

AVIATION...
00z Update...
Convection is moving south and dissipating this evening. Added a
TEMPO into MCN for the linger convection through 02Z. Clearing
skies overnight with some sct high clouds. Light east/southeast
winds. Feel with rain coverage this afternoon, there may be some
MVFR/IFR stratus development. Confidence highest across AHN. Not
expecting much shower/thunderstorm coverage tomorrow; mainly
across the southern tier (CSG/MCN). Winds veer to south/southwest
around 5 to 8kts in the afternoon/evening hours.

//ATL Confidence...00Z Update...
Medium confidence on winds. High confidence remaining elements.

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          72  95  74  98 /  40  20  20  30
Atlanta         74  94  75  95 /  30  20  20  30
Blairsville     66  90  68  91 /  40  30  20  30
Cartersville    72  94  73  96 /  30  20  20  30
Columbus        74  96  75  96 /  60  30  20  20
Gainesville     72  93  74  95 /  40  20  20  30
Macon           73  96  74  98 /  60  30  20  30
Rome            72  96  73  97 /  30  20  20  30
Peachtree City  71  94  72  95 /  30  20  20  30
Vidalia         74  96  74  97 /  60  30  20  20

&&

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

Hazardous weather outlook, Jul 21, 9:40 PM EDT, 1 hour 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
940 PM EDT THU JUL 21 2016

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-221200-
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-
940 PM EDT THU JUL 21 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH AND CENTRAL GEORGIA.

.DAY ONE...TONIGHT...

SCATTERED THUNDERSTORMS ARE POSSIBLE ACROSS PORTIONS OF NORTH AND
CENTRAL GEORGIA TONIGHT. A FEW OF THESE STORMS COULD BE STRONG
WITH THE POTENTIAL TO PRODUCE FREQUENT LIGHTNING STRIKES...GUSTY
WINDS AND LOCALLY HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

SCATTERED THUNDERSTORMS WILL BE POSSIBLE EACH AFTERNOON AND
EVENING. SOME STORMS MAY PRODUCE ISOLATED AREAS OF DAMAGING
WINDS...FREQUENT LIGHTNING AND VERY HEAVY RAIN.

.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, Jul 21, 8:23 PM EDT, 2 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
823 PM EDT THU JUL 21 2016

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

0601 PM     TSTM WND DMG     2 SSE GENEVA            32.55N  84.53W
07/21/2016                   TALBOT             GA   911 CALL CENTER

            LARGE TREE LIMBS WERE BLOWN ONTO POWER LINES ON HWY
            240.

&&

EVENT NUMBER FFC1600560

RWILLIS

Local storm report, Jul 21, 8:42 PM EDT, 2 hours 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
842 PM EDT THU JUL 21 2016

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

0440 PM     TSTM WND DMG     VALLEY VIEW             33.94N  84.33W
07/21/2016                   DEKALB             GA   PUBLIC

            A LARGE TREE WAS BLOWN DOWN AT THE INTERSECTION OF
            CHAMBLEE DUNWOODY RD AND NERINE CIR.

&&

EVENT NUMBER FFC1600561

RWILLIS

Local storm report, Jul 21, 8:47 PM EDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
847 PM EDT THU JUL 21 2016

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

0521 PM     TSTM WND DMG     1 NE BROWN HILL         32.57N  83.25W
07/21/2016                   BLECKLEY           GA   BROADCAST MEDIA

            TREES DOWN ALONG HIGHWAY 112 NORTH OF CARY.

&&

EVENT NUMBER FFC1600562

NLIST

Local storm report, Jul 21, 8:57 PM EDT, 2 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
857 PM EDT THU JUL 21 2016

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

0543 PM     TSTM WND DMG     SLEEPY HOLLOW           32.57N  83.70W
07/21/2016                   HOUSTON            GA   PUBLIC

            A LARGE TREE WAS BLOWN ONTO A HOME IN THE WOODBRIDGE
            SUBDIVISION.

&&

EVENT NUMBER FFC1600563

RWILLIS

Special weather statement, Jul 21, 9:00 PM EDT, 2 hours 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
900 PM EDT THU JUL 21 2016

GAZ076-085-086-220130-
JOHNSON GA-EMANUEL GA-JEFFERSON GA-
900 PM EDT THU JUL 21 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN JOHNSON...EMANUEL
AND SOUTHEASTERN JEFFERSON COUNTIES UNTIL 930 PM EDT...

AT 900 PM EDT...A STRONG THUNDERSTORM WAS NEAR SUMMERTOWN...OR 9 MILES
NORTH OF SWAINSBORO...MOVING SOUTHEAST AT 15 MPH.

  HAZARD...40 TO 50 MPH WIND...PEA SIZED HAIL AND FREQUENT CLOUD TO
           GROUND LIGHTNING.

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT
           MINOR DAMAGE TO TREE LIMBS AND BLOWING AROUND OF
           LIGHT...UNSECURED OBJECTS. LIGHTNING IS ONE OF NATURE'S
           LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU
           ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. ELECTRICAL
           APPLIANCES SHOULD NOT BE USED UNLESS IN AN EMERGENCY.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
SWAINSBORO...WADLEY...TWIN CITY...STILLMORE...BARTOW...GARFIELD...
SUMMERTOWN...NUNEZ...KITE...MODOC...BLUNDALE...CANOOCHEE...COLEMANS LAKE...
DELLWOOD...LEXSY...THREE POINTS AND GEORGE L SMITH STATE PARK.

LAT...LON 3254 8203 3256 8208 3252 8215 3248 8218
      3244 8219 3249 8240 3272 8258 3293 8245
      3288 8229 3284 8232 3283 8230 3283 8226
      3280 8221 3281 8215 3266 8208 3262 8202
      3260 8200
TIME...MOT...LOC 0100Z 307DEG 11KT 3273 8234

Special weather statement, Jul 21, 11:09 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1109 PM EDT THU JUL 21 2016

GAZ019-030-220345-
POLK GA-FLOYD GA-
1109 PM EDT THU JUL 21 2016

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN POLK AND SOUTHWESTERN
FLOYD COUNTIES UNTIL 1145 PM EDT...

AT 1108 PM EDT...A STRONG THUNDERSTORM WAS NEAR FORNEY...MOVING SOUTH
AT 15 MPH.

  HAZARD...UP TO 40 MPH WIND...FREQUENT CLOUD TO GROUND LIGHTNING
           AND HEAVY RAIN.

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT
           MINOR DAMAGE TO TREE LIMBS AND BLOWING AROUND OF
           LIGHT...UNSECURED OBJECTS. LIGHTNING IS ONE OF NATURE'S
           LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU
           ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. ELECTRICAL
           APPLIANCES SHOULD NOT BE USED UNLESS IN AN EMERGENCY.
           MOTORISTS SHOULD SLOW DOWN AND BE PREPARED FOR POSSIBLE
           LOSS OF CONTROL DUE TO HYDROPLANING. ALSO...THE HEAVY
           RAIN MAY CAUSE TEMPORARY STREET FLOODING OR ROAD PONDING
           IN SLOW DRAINAGE AREAS. WHEN WATER COVERS THE
           ROAD...REMEMBER TO TURN AROUND DON'T DROWN.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE
CAVE SPRING...ESOM HILL AND ETNA.

LAT...LON 3416 8528 3390 8531 3390 8536 3391 8539
      3420 8544
TIME...MOT...LOC 0308Z 016DEG 15KT 3412 8541

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:03 PM EDT	Special Weather Statement	FFC	Johnson	27 min
Jul 21, 9:00 PM EDT	Special Weather Statement	FFC	Emanuel	30 min
Jul 22, 4:05 PM EDT	Special Weather Statement	FFC	Dawson, Lumpkin	40 min
Jul 22, 4:58 PM EDT	Special Weather Statement	FFC	Union	32 min
Jul 22, 5:37 PM EDT	Special Weather Statement	FFC	Dade	23 min
Jul 22, 6:32 PM EDT	Special Weather Statement	FFC	Banks	28 min

Nearby

Special Weather Statements in Georgia, 2016 Every special weather statement in 2016

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.