Alert archive / Georgia / Special Weather Statements in 2020

Special Weather Statement, NWS Atlanta, GA

November 12, 2020Houston County, Twiggs County, Georgia

NWS Atlanta, GA issued this special weather statement at Nov 12, 2020, 3:49 AM EST for Houston County, Twiggs County, Georgia. It was in force for 41 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: Nov 12, 2020, 3:49 AM EST (08:49 UTC)
Expired: Nov 12, 2020, 4:30 AM EST
In force: 41 min
Issued by: NWS Atlanta, GA

Counties Houston County, GA, Twiggs County, GA

The radar

The Robins AFB radar (KJGX), 23 km from the middle of the area, began a volume at 08:51 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, 8.8 hours before the alert went out and 124 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: 410 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 127 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 Nov 12, 1:45 AM EST, 2 hours 4 minutes earlier.

Area forecast discussion, Nov 12, 1:45 AM EST, 2 hours 4 minutes before

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Hazardous weather outlook, Nov 11, 9:28 PM EST, 6 hours 21 minutes before

Hazardous Weather Outlook
National Weather Service Peachtree City GA
928 PM EST Wed Nov 11 2020

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-130230-
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-
928 PM EST Wed Nov 11 2020

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

.DAY ONE...Tonight...

The probability for widespread hazardous weather is low.

Residual showers will continue overnight through the forecast
area. Although not expected, very isolated storms cannot be
completely ruled out. The primary threat with any remaining storms
will be locally heavy rain which could lead to isolated flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday...

The focus for locally heavy rainfall will shift to Central GA on
Thursday as the tropical moisture pulls out from NW to SE during
the course of the day.

Not expecting anymore hazardous weather through the middle of next
week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

In the hours before

Special weather statement, Nov 12, 12:20 AM EST, 3 hours 29 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
1220 AM EST Thu Nov 12 2020

GAZ008-009-015-016-023-024-120600-
Hall GA-Banks GA-Union GA-Towns GA-White GA-Lumpkin GA-
1220 AM EST Thu Nov 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN HALL...NORTHWESTERN
BANKS...UNION...TOWNS...WHITE AND NORTHEASTERN LUMPKIN COUNTIES UNTIL
100 AM EST...

At 1219 AM EST...a cluster of showers with heavy rain was near
Sautee, or near Cleveland...moving northeast at 35 mph.

  HAZARD...Heavy rain.

  IMPACT...Heavy rain may cause temporary street flooding especially
           in poor drainage areas.

Some locations in the path of this storm include
Cleveland, Hiawassee, Blairsville, Young Harris, Helen, Unicoi State
Park, Robertstown, Blue Mountain Shelter, Gumlog, Mossy Creek, Titus,
Woods Hole Shelter, Low Gap Shelter, Vogel State Park, Anna Ruby
Falls, Leaf, Plum Orchard Gap Shelter, Turners Corner, Sautee and
Qualatchee Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately.  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.

LAT...LON 3495 8355 3494 8360 3492 8359 3491 8363
      3488 8366 3482 8365 3480 8368 3476 8363
      3469 8364 3465 8366 3455 8362 3451 8367
      3443 8361 3449 8355 3449 8352 3440 8364
      3478 8409 3480 8410 3499 8392 3499 8355
TIME...MOT...LOC 0519Z 234DEG 30KT 3465 8371

Special weather statement, Nov 12, 3:49 AM EST, 0 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
349 AM EST Thu Nov 12 2020

GAZ072-082>084-094-095-120930-
Peach GA-Wilkinson GA-Bibb GA-Houston GA-Jones GA-Twiggs GA-
349 AM EST Thu Nov 12 2020

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN PEACH...WESTERN
WILKINSON...EASTERN BIBB...HOUSTON...SOUTHEASTERN JONES AND TWIGGS
COUNTIES UNTIL 430 AM EST...

At 348 AM EST...heavy rain was over Huber, or 9 miles southeast of
Macon...moving northeast at 30 mph.

  HAZARD...Heavy rain.

  IMPACT...Heavy rain may cause temporary street flooding especially
           in poor drainage areas.

Some locations in the path of this storm include
Macon, Perry, Jeffersonville, Warner Robins, Centerville, Gordon,
McIntyre, Robins Air Force Base, Marion, Hayneville, Postell,
Meadowdale, Houston Lake, Mountain Springs, Griswoldville, Grove
Park, Moss Oak, Kathleen, Sand Bed and Bullard.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately.  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.

LAT...LON 3234 8361 3236 8382 3298 8361 3286 8320
TIME...MOT...LOC 0848Z 212DEG 27KT 3270 8357

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 11, 10:35 PM EST	Flash Flood Warning	FFC	DeKalb, Fulton, Gwinnett	6 hr
Nov 12, 12:05 AM EST	River Flood Warning	FFC	Forsyth, Fulton	6 hr
Nov 12, 12:20 AM EST	Special Weather Statement	FFC	Towns, Union, White	40 min
Nov 12, 1:37 AM EST	Flash Flood Warning	FFC	Towns, White	5 hr
Nov 12, 4:13 AM EST	Flash Flood Warning	FFC	Greene, Oglethorpe, Putnam	6 hr
Nov 12, 4:16 AM EST	Flash Flood Warning	FFC	Houston	6 hr
Nov 12, 4:27 AM EST	River Flood Warning	FFC	Forsyth	7 hr
Nov 12, 5:24 AM EST	Flash Flood Warning	FFC	Baldwin, Hancock	6 hr
Nov 12, 6:01 AM EST	Flash Flood Warning	FFC	Taliaferro, Warren, Wilkes	6 hr
Nov 12, 6:03 AM EST	Flash Flood Watch	FFC	Baldwin, Glascock, Hancock, Jefferson, Taliaferro, Warren and 3 more	5 hr
Nov 12, 6:40 AM EST	River Flood Warning	FFC	Forsyth, Fulton	30 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.