Alert archive / Georgia / Special Weather Statements in 2020

Special Weather Statement, NWS Atlanta, GA

April 20, 2020Stewart County, Webster County, Georgia

NWS Atlanta, GA issued this special weather statement at Apr 20, 2020, 12:51 AM EDT for Stewart County, Webster County, Georgia. It was in force for 39 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: Apr 20, 2020, 12:51 AM EDT (04:51 UTC)
Expired: Apr 20, 2020, 1:30 AM EDT
In force: 39 min
Issued by: NWS Atlanta, GA
Wind: 50

Counties Stewart County, GA, Webster County, GA

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 4.9 hours before the alert went out and 197 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: 2182 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 327 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 17.9

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 Apr 19, 9:30 PM EDT, 3 hours 21 minutes earlier.

Area forecast discussion, Apr 19, 9:30 PM EDT, 3 hours 21 minutes before

Area Forecast Discussion...Updated
National Weather Service Peachtree City GA
930 PM EDT Sun Apr 19 2020

.Update...

No changes at this time. Rain and thunderstorms will continue to
train across much of north and central GA. Strongest storms may
continue across Columbus to Macon area.

41

.Previous...

.SHORT TERM /Tonight through Monday Night/...

Warm front and sharp sfc instability gradient continues to remain a
bit farther south and flirting with the southernmost tier of
counties or even just a tier even farther south. Some of the
stronger convective triggering has still been on the northern
elevated CAPE side. An axis of training cells and heavier rain has
set up mainly along and south of a zone near Columbus to Macon and
flash flooding concerns could ramp up shortly given upstream trends
back in AL and fairly good consensus in CAMs. The Flash Flood Watch
continues for the southern majority of the area - see Hydrology
section below for more details.

While parts of north GA transitioned to a lull in precip coverage,
we are still in an open upper wave and could easily fill back in
ahead of main trough axis later tonight. This feature with attendant
sfc low and a strong LLJ kicking in late this evening into the early
morning hours looks to allow for the last one to two rounds of
strong to severe storms even farther north with possible bowing
segments or QLCS anywhere from the Atlanta metro into all of central
GA. SPC has maintained the MDT risk across central GA with a tighter
gradient of Enhanced/Marginal north.

Expect rapidly improving conditions with some enhanced NW gradient
winds in the post frontal regime for Monday. Highs will be mainly
in the low 70s north to mid 70s south and then lows Monday night
generally ranging from the upper 40s to low 50s.

Baker

&&

.LONG TERM /Tuesday through Sunday/...

Dry conditions will prevail at the onset of the long-term forecast
period. A reinforcing dry cold front will push through the area on
Tuesday, bringing breezier conditions during the day and cooler
overnight temperatures. Surface high pressure will gradually shift
eastward through the day Wednesday with one more dry day through
Wednesday night.

By Thursday, the next storm system will be quickly approaching.
While there is fairly good model agreement regarding the general
track of the surface low on Thursday, some discrepancies remain with
the ECMWF favoring a slightly more southerly track across the
Tennessee Valley while the GFS is more northerly across the Ohio
Valley. Convective parameters do favor some severe potential on
Thursday, though questions remain regarding the quality of
instability. Additionally, rainfall totals of 1-2" again look
probable with this system.

Behind this strong midweek system, model discrepancies increase
significantly by late week into next weekend. Given substantial
differences in timing and evolution by this time frame, maintained
a return to chance PoPs by the weekend.

Willis

&&

.HYDROLOGY...
The Flash Flood watch remains in effect generally along and south
of the I-20 corridor through tonight into early Monday. While one
to two and a half inches have fallen already, an additional one to
four inches and locally higher amounts are possible through
tonight. Heavy rainfall will likely lead to localized flooding.
Flooding of low-lying areas, creeks and streams can be expected
with additional larger river rises anticipated as well, well after
the rain ends.

Baker

&&

.AVIATION...
00Z UPDATE...

Warm front remains across north FL and not expected to push north
until after 06z. The southern taf sites will continue to have more
predominant TSRA coverage into this evening while there is more
uncertainty along the northern sites. Stronger forcing could have
predominant TSRA in the 06-09z across the taf sites. Ceilings are
LIFR/IFR and should remain there until after sunrise...with an
improving trend during the day Monday. Winds should stay east to
southeast 6 to 9 kts through much of the night...then become
northwest with gusts after 12z.

//ATL CONFIDENCE...00Z UPDATE...

Medium on all elements.

41

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          54  73  49  74 / 100  80   0   5
Atlanta         56  70  51  73 / 100  60   0   5
Blairsville     50  66  44  67 / 100  70   5  10
Cartersville    53  70  48  74 / 100  50   0   5
Columbus        60  75  53  78 / 100  40   0   5
Gainesville     53  71  50  71 / 100  70   0   5
Macon           59  75  51  78 / 100  80   0   5
Rome            53  71  48  74 / 100  40   0   5
Peachtree City  56  72  49  75 / 100  50   0   5
Vidalia         63  76  56  80 /  90  70  10   5

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch through Monday morning for the following
zones: Baldwin...Barrow...Bibb...Bleckley...Butts...Carroll...
Chattahoochee...Clarke...Clayton...Cobb...Coweta...Crawford...
Crisp...DeKalb...Dodge...Dooly...Douglas...Emanuel...Fayette...
Glascock...Greene...Gwinnett...Hancock...Haralson...Harris...
Heard...Henry...Houston...Jasper...Jefferson...Johnson...Jones...
Lamar...Laurens...Macon...Marion...Meriwether...Monroe...
Montgomery...Morgan...Muscogee...Newton...North Fulton...
Oconee...Oglethorpe...Paulding...Peach...Pike...Polk...Pulaski...
Putnam...Rockdale...Schley...South Fulton...Spalding...Stewart...
Sumter...Talbot...Taliaferro...Taylor...Telfair...Toombs...
Treutlen...Troup...Twiggs...Upson...Walton...Warren...
Washington...Webster...Wheeler...Wilcox...Wilkes...Wilkinson.

&&

SHORT TERM...41
LONG TERM....Willis
AVIATION...41

Hazardous weather outlook, Apr 19, 4:40 AM EDT, 20 hours 11 minutes before

Hazardous Weather Outlook
National Weather Service Peachtree City GA
440 AM EDT Sun Apr 19 2020

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-201000-
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-
440 AM EDT Sun Apr 19 2020

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

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

Scattered to numerous severe thunderstorms are expected across
central and portions of north Georgia this afternoon and tonight.
The greatest threat can be expected along and south of I-20 with
Central Georgia most favored for strong, long-track tornadoes
along with damaging winds and large hail.

A flash flood watch is in effect for central and portions
of north Georgia. Heavy rain across the area will likely lead to
localized flooding. Refer to the Flash flood watch / ATLFFAFFC /
for more information.

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

Strong thunderstorms will be possible over portions of east and
central Georgia early Monday.

Another round of potentially strong thunderstorms is expected
across north and central Georgia on Thursday and Thursday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is requested for this afternoon and tonight
across central and portions of north Georgia, along and south of I-20.
Please relay any information about observed severe weather to the NWS
while following all local, state, and CDC guidelines.

In the hours before

Local storm report, Apr 19, 10:26 PM EDT, 2 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1026 PM EDT SUN APR 19 2020

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

0906 PM     FLASH FLOOD      2 SW CATAULA            32.63N  84.90W
04/19/2020                   HARRIS             GA   EMERGENCY MNGR

            STANDING BOY CREEK AT HWY 27 IS FLOODED AND BLOCKED
            OFF.

&&

EVENT NUMBER FFC2000593

NM

Local storm report, Apr 19, 10:33 PM EDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1033 PM EDT SUN APR 19 2020

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

0906 PM     FLASH FLOOD      3 ENE GOAT ROCK LAKE    32.63N  85.03W
04/19/2020                   HARRIS             GA   EMERGENCY MNGR

            CANNON RD OFF HWY 315 NEAR FORTSON AND WHITESVILLE RD
            IN FORTSON ARE FLOODED AND BLOCKED OFF.

&&

EVENT NUMBER FFC2000594

NM

Local storm report, Apr 19, 10:51 PM EDT, 2 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1051 PM EDT SUN APR 19 2020

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

1000 PM     FLASH FLOOD      1 WNW BONAIRE           32.55N  83.61W
04/19/2020                   HOUSTON            GA   EMERGENCY MNGR

            COUNTY RD AND GAIL RD IN BONAIRE ARE BOTH CLOSED DUE TO
            FLOODING.

&&

EVENT NUMBER FFC2000595

NM

Local storm report, Apr 19, 11:08 PM EDT, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1108 PM EDT SUN APR 19 2020

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

1006 PM     FLASH FLOOD      1 SSE GREEN ISLAND HILL 32.52N  85.00W
04/19/2020                   MUSCOGEE           GA   SOCIAL MEDIA

            BASEMENT REPORTED FLOODED NEAR THE INTERSECTION OF
            CASCADE RD AND ROARING BRANCH RD

&&

EVENT NUMBER FFC2000596

NM

Local storm report, Apr 19, 11:27 PM EDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1127 PM EDT SUN APR 19 2020

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

1016 PM     FLASH FLOOD      3 NW PERRY              32.49N  83.76W
04/19/2020                   HOUSTON            GA   EMERGENCY MNGR

            IVERNESS DR IN PERRY IS CLOSED DUE TO WATER OVER THE
            ROADWAY. PERRY PARKWAY NEAR AIRPORT RD ALSO HAS ONE LANE
            CLOSED DUE TO WATER OVER THE ROADWAY.

&&

EVENT NUMBER FFC2000597

NM

Special weather statement, Apr 20, 12:51 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
1251 AM EDT Mon Apr 20 2020

GAZ102-103-200530-
Stewart GA-Webster GA-
1251 AM EDT Mon Apr 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR STEWART AND WEBSTER COUNTIES
UNTIL 130 AM EDT...

At 1251 AM EDT...a strong thunderstorm was over Osco, or over
Eufaula...moving east at 65 mph.

  HAZARD...40 to 50 mph wind 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
Lumpkin, Preston, Richland, Weston, Seminole, Charles, Kimbrough,
Westville, Brooklyn, Leveretts, Troutman, Omaha, Sanford, Church
Hill, Centerpoint, Dumas, Louvale and Providence Canyon State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. Motorists should
slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3192 8491 3195 8496 3198 8496 3199 8507
      3209 8504 3213 8506 3218 8501 3220 8496
      3222 8498 3222 8493 3223 8492 3223 8482
      3222 8480 3223 8480 3223 8462 3219 8459
      3217 8454 3213 8453 3213 8443 3193 8444
TIME...MOT...LOC 0451Z 261DEG 56KT 3188 8520

WIND...50MPH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 8:14 PM EDT	Flash Flood Warning	FFC	Bleckley, Dodge, Laurens, Pulaski, Twiggs, Wilkinson	10 hr
Apr 19, 8:49 PM EDT	Special Weather Statement	FFC	Chattahoochee, Marion, Muscogee	26 min
Apr 19, 9:01 PM EDT	River Flood Warning	FFC	Clayton, Fayette, Spalding	30 hr
Apr 19, 9:01 PM EDT	River Flood Warning	FFC	Fayette, Spalding	53 hr
Apr 19, 9:01 PM EDT	River Flood Warning	FFC	Meriwether, Pike	13 hr
Apr 19, 9:01 PM EDT	River Flood Warning	FFC	Crawford, Talbot, Taylor, Upson	46 hr
Apr 19, 9:01 PM EDT	River Flood Warning	FFC	Dooly, Macon, Sumter	21 days
Apr 19, 9:03 PM EDT	River Flood Warning	FFC	DeKalb, Rockdale	40 hr
Apr 19, 9:03 PM EDT	River Flood Warning	FFC	Newton, Rockdale	56 hr
Apr 19, 9:05 PM EDT	River Flood Warning	FFC	Carroll, Coweta, Heard	19 hr
Apr 19, 9:05 PM EDT	River Flood Warning	FFC	Chattahoochee, Muscogee	54 hr
Apr 19, 9:09 PM EDT	River Flood Warning	FFC	Baldwin, Washington, Wilkinson	15 hr
Apr 19, 9:09 PM EDT	River Flood Warning	FFC	Johnson, Washington, Wilkinson	6 days
Apr 19, 9:09 PM EDT	River Flood Warning	FFC	Johnson, Laurens, Washington, Wilkinson	21 days
Apr 19, 9:15 PM EDT	Special Weather Statement	FFC	Marion, Schley	30 min
Apr 19, 9:17 PM EDT	River Flood Warning	FFC	Bibb, Houston, Jones, Monroe, Twiggs	21 days
Apr 19, 9:31 PM EDT	River Flood Warning	FFC	Dooly	28 hr
Apr 19, 9:37 PM EDT	River Flood Warning	FFC	Pulaski	48 hr
Apr 19, 9:42 PM EDT	River Flood Warning	FFC	Jones	25 hr
Apr 19, 9:44 PM EDT	Special Weather Statement	FFC	Macon, Schley	31 min
Apr 19, 9:52 PM EDT	Special Weather Statement	FFC	Chattahoochee, Marion	38 min
Apr 19, 9:56 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Marion, Muscogee, Stewart, Webster	49 min
Apr 19, 10:49 PM EDT	River Flood Warning	FFC	Forsyth, Fulton	11 hr
Apr 20, 12:11 AM EDT	Flash Flood Warning	FFC	Emanuel, Johnson, Laurens, Montgomery, Toombs, Treutlen and 1 more	6 hr
Apr 20, 1:00 AM EDT	Severe Thunderstorm Warning	FFC	Stewart, Webster	45 min
Apr 20, 1:30 AM EDT	Special Weather Statement	FFC	Crisp, Dooly, Sumter	60 min
Apr 20, 2:11 AM EDT	Severe Thunderstorm Warning	FFC	Crisp, Wilcox	49 min
Apr 20, 2:58 AM EDT	Special Weather Statement	FFC	Montgomery, Telfair, Treutlen, Wheeler	32 min
Apr 20, 7:38 AM EDT	River Flood Warning	FFC	Troup	21 hr
Apr 20, 7:44 AM EDT	River Flood Warning	FFC	Coweta, Fayette, Spalding	20 hr

Nearby

Special Weather Statements in Georgia, 2020 Every special weather statement in 2020

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.