Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 24, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Mar 31, 2021, 8:42 AM EDT for 4 counties in Tennessee. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2021, 8:42 AM EDT (12:42 UTC)
- Expired
- Mar 31, 2021, 1:31 PM EDT
- In force
- 5 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bradley County, TN, Hamilton County, TN, Marion County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 12:42 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
Nashville Metro, TN (KBNA), launched 12:00Z, 0.7 hours before the alert went out and 142 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 498 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
481
WGUS54 KMRX 311242
FFWMRX
TNC011-065-115-153-311645-
/O.NEW.KMRX.FF.W.0024.210331T1242Z-210331T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
842 AM EDT Wed Mar 31 2021
The National Weather Service in Morristown has issued a
* Flash Flood Warning for...
Southern Bradley County in east Tennessee...
Southern Hamilton County in east Tennessee...
Marion County in east Tennessee...
Southern Sequatchie County in east Tennessee...
* Until 1245 PM EDT /1145 AM CDT/.
* At 842 AM EDT /742 AM CDT/, local law enforcement reported storms
producing heavy rain across the warned area and several roads are
closed due to flooding. Between 2 and 3 inches of rain have
fallen. Additional rainfall amounts of 1 to 2 inches are possible
in the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by storms.
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...
Chattanooga, Cleveland, Jasper, Soddy-Daisy, Signal Mountain,
South Pittsburg, Walden, Lakesite, Whitwell, Kimball, Monteagle,
Ridgeside, Fairmount, Harrison, South Cleveland, Wildwood Lake,
Red Bank, Collegedale, Powells Crossroads and Orme.
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 3533 8555 3508 8474 3499 8479 3499 8586
3522 8587 3524 8582 3522 8574 3524 8569
3529 8571
FLASH FLOOD...OBSERVED
$$
192 follow-up statements
144
WGUS54 KMRX 311639
FFWMRX
TNC011-065-115-153-311745-
/O.EXT.KMRX.FF.W.0024.000000T0000Z-210331T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
1239 PM EDT Wed Mar 31 2021
The National Weather Service in Morristown has extended the
* Flash Flood Warning for...
Southern Bradley County in east Tennessee...
Southern Hamilton County in east Tennessee...
Marion County in east Tennessee...
Southern Sequatchie County in east Tennessee...
* Until 145 PM EDT /1245 PM CDT/.
* At 1239 PM EDT /1139 AM CDT/, local law enforcement reported
storms producing heavy rain across the warned area and several
roads are closed due to flooding. Between 2 and 3 inches of rain
have fallen.
HAZARD...Flash flooding caused by storms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Chattanooga, Cleveland, Jasper, Soddy-Daisy, Signal Mountain,
South Pittsburg, Walden, Lakesite, Whitwell, Kimball, Monteagle,
Ridgeside, Fairmount, Harrison, South Cleveland, Wildwood Lake,
Red Bank, Collegedale, Powells Crossroads and Orme.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3533 8555 3508 8474 3499 8479 3499 8586
3522 8587 3524 8582 3522 8574 3524 8569
3529 8571
FLASH FLOOD...OBSERVED
$$
19406
WGUS74 KMRX 311731
FFSMRX
Flash Flood Statement
National Weather Service Morristown TN
131 PM EDT Wed Mar 31 2021
TNC011-065-115-153-311741-
/O.CAN.KMRX.FF.W.0024.000000T0000Z-210331T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bradley TN-Hamilton TN-Marion TN-Sequatchie TN-
131 PM EDT Wed Mar 31 2021 /1231 PM CDT Wed Mar 31 2021/
...FLASH FLOOD WARNING FOR SOUTHERN BRADLEY, SOUTHERN HAMILTON,
MARION AND SOUTHERN SEQUATCHIE COUNTIES HAS BEEN REPLACED WITH A
FLOOD WARNING...
LAT...LON 3533 8555 3508 8474 3499 8479 3499 8586
3522 8587 3524 8582 3522 8574 3524 8569
3529 8571
$$
SRThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 9:37 PM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Johnson, Monroe and 2 more | 15 hr |
| Mar 31, 4:57 AM EDT | Areal Flood Advisory | MRX | Marion | 2 hr |
| Mar 31, 5:40 AM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton | 3 hr |
| Mar 31, 7:57 AM EDT | Areal Flood Advisory | MRX | Marion | 46 min |
| Mar 31, 8:52 AM EDT | Areal Flood Advisory | MRX | Blount, Jefferson, Loudon, Sevier | 5 hr |
| Mar 31, 8:59 AM EDT | Areal Flood Advisory | MRX | Bledsoe, Rhea, Sequatchie | 4 hr |
| Mar 31, 9:05 AM EDT | Areal Flood Advisory | MRX | Monroe | 5 hr |
| Mar 31, 9:52 AM EDT | Areal Flood Advisory | MRX | Monroe, Polk | 3 hr |
| Mar 31, 10:55 AM EDT | River Flood Warning | MRX | Bledsoe, Marion, Sequatchie | 35 hr |
| Mar 31, 10:57 AM EDT | River Flood Warning | MRX | Hamilton | 47 hr |
| Mar 31, 12:46 PM EDT | River Flood Warning | MRX | Cocke | 22 hr |
| Mar 31, 1:31 PM EDT | Areal Flood Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 6 hr |
| Mar 31, 2:04 PM EDT | River Flood Warning | MRX | Polk | 14 hr |
| Mar 31, 3:38 PM EDT | Freeze Watch | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 25 more | 18 hr |
| Mar 31, 3:38 PM EDT | Freeze Warning | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 25 more | 17 hr |
| Mar 31, 3:38 PM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Johnson, Monroe and 3 more | 12 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.