Alert archive / Georgia / Flash Flood Warnings in 2021
Flash Flood Warning 12, NWS Tallahassee, FL
NWS Tallahassee, FL issued this flash flood warning at May 11, 2021, 7:45 PM EDT for Decatur County, Georgia. It was in force for 3 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 11, 2021, 7:45 PM EDT (23:45 UTC)
- Expired
- May 11, 2021, 10:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Tallahassee, FL
- Area
- Storm-based polygon
- Flood severity
- None
County Decatur County, GA
The radar
The Tallahassee radar (KTLH), 59 km from the middle of the area, began a volume at 23:47 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 11, 7:57 PM EDT | FLASH FLOOD | 4 Ne Bainbridge, GA | WATER FLOWING FROM A FIELD ACROSS HIGHWAY 97. |
| May 11, 8:30 PM EDT | FLASH FLOOD | 5 Ssw Mount Pleasant, GA | WATER IS FLOWING ACROSS THE ROAD AT 704 OLD PELHAM ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 11.8 hours before the alert went out and 59 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.
- Mixed-layer CAPE
- 799 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 866 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.1
The text
As transmitted.
575
WGUS52 KTAE 112345
FFWTAE
GAC087-120245-
/O.NEW.KTAE.FF.W.0012.210511T2345Z-210512T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tallahassee FL
745 PM EDT Tue May 11 2021
The National Weather Service in Tallahassee has issued a
* Flash Flood Warning for...
Decatur County in southwestern Georgia...
* Until 1045 PM EDT.
* At 745 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 4 and 5 inches of rain
have fallen in the last 2 Hours. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
Bainbridge and Climax.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3081 8438 3080 8439 3086 8448 3091 8451
3093 8455 3097 8455 3103 8448 3102 8438
3101 8438 3100 8438 3099 8438 3095 8438
3094 8438 3088 8438 3087 8438 3085 8438
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 2 HOURS
$$
Godsey1 follow-up statement
930
WGUS72 KTAE 120117
FFSTAE
Flash Flood Statement
National Weather Service Tallahassee FL
917 PM EDT Tue May 11 2021
GAC087-120245-
/O.CON.KTAE.FF.W.0012.000000T0000Z-210512T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Decatur GA-
917 PM EDT Tue May 11 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT THIS
EVENING FOR DECATUR COUNTY...
At 917 PM EDT, Doppler radar indicated that thunderstorms that
produced heavy rain across the warned area have weakened and moved
to the east of Decatur County. Between 4 and 6 inches of rain have
fallen in the last 2 Hours. A few reports of flash flooding have
been received across North Central Decatur County. Even though the
heavy rainfall has ended, continued runoff within the warning area
could lead to additional flash flooding.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
Some locations that will experience flash flooding include...
Bainbridge and Climax.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 3081 8438 3080 8439 3086 8448 3091 8451
3093 8455 3097 8455 3103 8448 3102 8438
3101 8438 3100 8438 3099 8438 3095 8438
3094 8438 3088 8438 3087 8438 3085 8438
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.5 INCHES IN 2 HOURS
$$
GodseyThe office that day
Everything else NWS Tallahassee, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 6:55 PM EDT | Special Weather Statement | TAE | Seminole | 50 min |
| May 11, 7:19 PM EDT | Areal Flood Advisory | TAE | Decatur | 3 hr |
| May 11, 7:43 PM EDT | Special Weather Statement | TAE | Decatur, Grady | 32 min |
Nearby
Flash Flood Warnings in Georgia, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.