Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 36, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Aug 30, 2021, 6:20 PM EDT for Bradley County, Tennessee. It was in force for 115 min. 1 report 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
- Aug 30, 2021, 6:20 PM EDT (22:20 UTC)
- Expired
- Aug 30, 2021, 8:15 PM EDT
- In force
- 115 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
County Bradley County, TN
The radar
The Northeast Alabama radar (KHTX), 106 km from the middle of the area, began a volume at 22:21 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 |
|---|---|---|---|
| Aug 30, 6:41 PM EDT | FLASH FLOOD | 2 Nnw Waterville, TN | SEVERAL ROADWAYS FLOODED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 10.3 hours before the alert went out and 188 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
- 437 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1082 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
921
WGUS54 KMRX 302220
FFWMRX
TNC011-310015-
/O.NEW.KMRX.FF.W.0036.210830T2220Z-210831T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
620 PM EDT Mon Aug 30 2021
The National Weather Service in Morristown has issued a
* Flash Flood Warning for...
Bradley County in east Tennessee...
* Until 815 PM EDT.
* At 620 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain in Bradley county. Several reports of roadway flooding.
Between 1 and 2.5 inches of rain have fallen. Additional rainfall
amounts of 0.5 to 1 inch are possible in the warned area. Flash
flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Cleveland, East Cleveland, South Cleveland, Wildwood Lake,
Waterville, Flint Springs, Tasso, McDonald, Hopewell, Gap Springs,
Red Clay State Park and Apison.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3529 8494 3518 8470 3509 8475 3508 8474
3499 8478 3499 8497 3502 8496 3503 8499
3505 8500 3506 8500 3508 8500 3508 8501
3510 8501 3513 8503 3514 8503 3515 8502
3515 8501 3517 8501
FLASH FLOOD...RADAR INDICATED
$$
DH1 follow-up statement
121
WGUS74 KMRX 302326
FFSMRX
Flash Flood Statement
National Weather Service Morristown TN
726 PM EDT Mon Aug 30 2021
TNC011-310015-
/O.CON.KMRX.FF.W.0036.000000T0000Z-210831T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bradley TN-
726 PM EDT Mon Aug 30 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT THIS
EVENING FOR BRADLEY COUNTY...
At 726 PM EDT, local law enforcement reported several flooded
roadways across the county. Up to 3 inches of rain have fallen.
Additional rainfall amounts of 0.5 to 1 inch are possible in the
warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Cleveland, East Cleveland, South Cleveland, Wildwood Lake,
Waterville, Flint Springs, Tasso, McDonald, Hopewell, Gap Springs,
Red Clay State Park and Apison.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3529 8494 3518 8470 3509 8475 3508 8474
3499 8478 3499 8497 3502 8496 3503 8499
3505 8500 3506 8500 3508 8500 3508 8501
3510 8501 3513 8503 3514 8503 3515 8502
3515 8501 3517 8501
FLASH FLOOD...OBSERVED
$$
DHThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 3:35 AM EDT | Flash Flood Watch | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 48 hr |
| Aug 30, 1:22 PM EDT | Areal Flood Advisory | MRX | Campbell | 113 min |
| Aug 30, 1:46 PM EDT | Special Weather Statement | MRX | Campbell | 29 min |
| Aug 30, 2:13 PM EDT | Areal Flood Advisory | MRX | Campbell | 2 hr |
| Aug 30, 3:25 PM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Monroe, Sevier and 1 more | 34 hr |
| Aug 30, 4:39 PM EDT | Areal Flood Advisory | MRX | Campbell, Scott | 2 hr |
| Aug 30, 5:18 PM EDT | Special Weather Statement | MRX | Bradley, Hamilton, Polk | 57 min |
| Aug 30, 5:24 PM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton, Meigs, Polk | 2 hr |
| Aug 30, 6:00 PM EDT | Special Weather Statement | MRX | McMinn, Meigs, Monroe, Rhea | 45 min |
| Aug 30, 6:06 PM EDT | Areal Flood Advisory | MRX | Bradley, McMinn, Meigs, Monroe, Polk, Rhea | 114 min |
| Aug 30, 6:52 PM EDT | Areal Flood Advisory | MRX | Monroe | 113 min |
| Aug 30, 6:57 PM EDT | Special Weather Statement | MRX | Bledsoe, Blount, Loudon, McMinn, Meigs, Monroe and 2 more | 63 min |
| Aug 30, 7:00 PM EDT | Areal Flood Advisory | MRX | Anderson, Blount, Knox, Loudon, Meigs, Monroe and 3 more | 2 hr |
| Aug 30, 7:47 PM EDT | Special Weather Statement | MRX | Blount, Knox, Sevier | 58 min |
Nearby
Flash Flood Warnings in Tennessee, 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.