Alert archive / Georgia / Special Weather Statements in 2020

Special Weather Statement, NWS Atlanta, GA

April 20, 20204 counties in Georgia

NWS Atlanta, GA issued this special weather statement at Apr 20, 2020, 2:58 AM EDT for 4 counties in Georgia. It was in force for 32 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, 2:58 AM EDT (06:58 UTC)
Expired: Apr 20, 2020, 3:30 AM EDT
In force: 32 min
Issued by: NWS Atlanta, GA
Wind: 40

Counties Montgomery County, GA, Telfair County, GA, Treutlen County, GA, Wheeler County, GA

The radar

The Robins AFB radar (KJGX), 87 km from the middle of the area, began a volume at 06:59 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

Jacksonville, FL (KJAX), launched 00:00Z, 7.0 hours before the alert went out and 201 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: 262 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1615 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.2

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 20, 1:50 AM EDT, 1 hour 8 minutes earlier.

Area forecast discussion, Apr 20, 1:50 AM EDT, 1 hour 8 minutes before

Area Forecast Discussion
National Weather Service Peachtree City GA
150 AM EDT Mon Apr 20 2020

.PREV DISCUSSION... /Issued 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...
06Z Update...
IFR/LIFR conditions expected through 12-14Z with improvements to
VFR after 16Z. Winds will shift from the south and southwest to
northwest after 12Z increasing to near 10kts throughout the
afternoon with isolated low end gusts near 20kts. Area of showers
and thunderstorms will push through the TAF sites, exiting
between 11-14Z.

//ATL Confidence...
06Z Update...
Medium confidence all elements.

Atwell

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          73  49  74  45 /  80   0   5   0
Atlanta         70  51  73  46 /  60   0   5   0
Blairsville     66  44  67  38 /  70   5  10   0
Cartersville    70  48  74  43 /  50   0   5   0
Columbus        75  53  78  50 /  40   0   5   0
Gainesville     71  50  71  44 /  70   0   5   0
Macon           75  51  78  48 /  80   0   5   0
Rome            71  48  74  43 /  40   0   5   0
Peachtree City  72  49  75  46 /  50   0   5   0
Vidalia         76  56  80  53 /  70  10   5   0

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch until 8 AM EDT this 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.

Tornado Watch until 7 AM EDT this morning for the following
zones: Crisp...Dooly...Pulaski...Stewart...Sumter...Webster...
Wilcox.

&&

SHORT TERM...Atwell
LONG TERM....BDL
AVIATION...Atwell

Hazardous weather outlook, Apr 19, 4:40 AM EDT, 22 hours 18 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, 10:51 PM EDT, 4 hours 7 minutes 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, 3 hours 50 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, 3 hours 31 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, 2 hours 7 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

Special weather statement, Apr 20, 1:30 AM EDT, 1 hour 28 minutes before

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

GAZ104>106-200630-
Crisp GA-Dooly GA-Sumter GA-
130 AM EDT Mon Apr 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR CRISP...DOOLY AND SUMTER COUNTIES
UNTIL 230 AM EDT...

At 129 AM EDT...a strong thunderstorm was over Leveretts, or 8 miles
south of Preston...moving east at 65 mph.

  HAZARD...40 to 50 mph wind and enhanced risk for downed trees.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects is expected. Trees can also
           down more easily with already wet soil from previous
           rainfall.

Some locations in the path of this storm include
Americus, Cordele, Vienna, Plains, Arabi, Pinehurst, Leslie, Lilly,
De Soto, Desoto, Cobb, Sumter, Lamar, Richwood, Croxton Crossroads,
New Era, Huntington, Pennington, Friendship and Drayton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately.

A tornado watch remains in effect. Continue to monitor NOAA Weather
Radio...weather.gov or other media outlets for further statements or
possible warnings on these storms.

LAT...LON 3183 8384 3182 8385 3184 8386 3185 8394
      3186 8393 3190 8393 3191 8392 3192 8434
      3187 8434 3197 8444 3216 8443 3217 8403
      3218 8403 3222 8361 3181 8361 3181 8381
TIME...MOT...LOC 0529Z 266DEG 57KT 3194 8457

WIND...50MPH

Special weather statement, Apr 20, 2:58 AM EDT, 0 minutes before

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

GAZ097-098-108>112-200730-
Wheeler GA-Telfair GA-Treutlen GA-Wilcox GA-Montgomery GA-Laurens GA-
Dodge GA-
258 AM EDT Mon Apr 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR WHEELER...TELFAIR...TREUTLEN...
SOUTHEASTERN WILCOX...MONTGOMERY...SOUTHEASTERN LAURENS AND SOUTHERN
DODGE COUNTIES UNTIL 330 AM EDT...

At 257 AM EDT...a line of strong thunderstorms was along a line
extending from near Minter to near Owensboro...and moving east at 50
mph.

  HAZARD...40 mph wind, heavy rain, and elevated risk of downed
           trees.

  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
McRae, Soperton, Abbeville, Alamo, Mount Vernon, Vidalia, Helena,
Lumber City, Glenwood, Milan, Ailey, Rhine, Scotland, Chauncey,
Higgston, Jacksonville, Tarrytown, Towns, Horse Creek Wma and
Lothair.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A tornado watch remains in effect. Continue to monitor NOAA Weather
Radio...weather.gov or other media outlets for further statements or
possible warnings on these storms.

LAT...LON 3178 8303 3181 8309 3181 8314 3185 8318
      3185 8345 3250 8278 3251 8265 3250 8250
      3244 8238 3220 8244 3196 8269 3192 8265
      3192 8268 3186 8278 3178 8286
TIME...MOT...LOC 0657Z 267DEG 45KT 3246 8275 3185 8338

WIND...40MPH

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, 12:51 AM EDT	Special Weather Statement	FFC	Stewart, Webster	39 min
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, 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; radar from the NEXRAD Level II archive.