Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Mar 25, 2021, 1:03 PM EDT for 4 counties in Tennessee. 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
- Mar 25, 2021, 1:03 PM EDT (17:03 UTC)
- Expired
- Mar 25, 2021, 4:15 PM EDT
- In force
- 3 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), 75 km from the middle of the area, began a volume at 17:06 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 |
|---|---|---|---|
| Mar 25, 1:33 PM EDT | FLOOD | 4 Nw East Brainerd, TN | REPORT FROM MPING: RIVER/CREEK OVERFLOWING; CROPLAND/YARD/BASEMENT FLOODING. |
| Mar 25, 2:11 PM EDT | FLASH FLOOD | 4 Nw East Brainerd, TN | SEVERAL ROADWAYS ARE FLOODED AND BARRICADED ACROSS HAMILTON COUNTY. |
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, 5.1 hours before the alert went out and 161 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
- 60 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 753 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
299
WGUS54 KMRX 251703
FFWMRX
TNC011-065-115-153-252015-
/O.NEW.KMRX.FF.W.0001.210325T1703Z-210325T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
103 PM EDT Thu Mar 25 2021
The National Weather Service in Morristown has issued a
* Flash Flood Warning for...
Bradley County in east Tennessee...
Hamilton County in east Tennessee...
Marion County in east Tennessee...
Southeastern Sequatchie County in east Tennessee...
* Until 415 PM EDT /315 PM CDT/.
* At 103 PM EDT /1203 PM CDT/, emergency management reported flash
flooding in Several roadways across Hamilton county are flooded.
Between 0.5 and 1.5 inches of rain have fallen. Flash flooding is
already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Emergency management 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, Ridgeside,
Harrison, Fairmount, South Cleveland, East 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.
&&
LAT...LON 3512 8586 3528 8521 3526 8487 3521 8470
3499 8478 3499 8586
FLASH FLOOD...OBSERVED
$$
DH1 follow-up statement
460
WGUS74 KMRX 251914
FFSMRX
Flash Flood Statement
National Weather Service Morristown TN
314 PM EDT Thu Mar 25 2021
TNC011-065-115-153-252015-
/O.CON.KMRX.FF.W.0001.000000T0000Z-210325T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bradley TN-Hamilton TN-Marion TN-Sequatchie TN-
314 PM EDT Thu Mar 25 2021 /214 PM CDT Thu Mar 25 2021/
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM EDT/315 PM
CDT/ THIS AFTERNOON FOR BRADLEY, HAMILTON, MARION AND SOUTHEASTERN
SEQUATCHIE COUNTIES...
At 314 PM EDT /214 PM CDT/, emergency management reported flash
flooding in Several roadways across Hamilton county are flooded.
Between 1.5 and 2 inches of rain have fallen. Additional rainfall
amounts of 0.5 to 1 inch are possible in the warned area. Flash
flooding is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Emergency management reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Chattanooga, Cleveland, Jasper, Soddy-Daisy, Signal Mountain,
South Pittsburg, Walden, Lakesite, Whitwell, Kimball, Ridgeside,
Harrison, Fairmount, South Cleveland, East Cleveland, Wildwood
Lake, Red Bank, Collegedale, Powells Crossroads and Orme.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 3512 8586 3528 8521 3526 8487 3521 8470
3499 8478 3499 8586
FLASH FLOOD...OBSERVED
$$
DHThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 3:41 AM EDT | Wind Advisory | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 25 more | 24 hr |
| Mar 25, 10:22 AM EDT | River Flood Warning | MRX | Bledsoe, Marion, Sequatchie | 4 days |
| Mar 25, 10:53 AM EDT | Severe Thunderstorm Warning | MRX | Hamilton, Marion | 33 min |
| Mar 25, 11:20 AM EDT | Special Weather Statement | MRX | Bradley, Polk | 40 min |
| Mar 25, 2:28 PM EDT | Areal Flood Advisory | MRX | Polk | 3 hr |
| Mar 25, 2:52 PM EDT | River Flood Warning | MRX | Hamilton | 41 hr |
| Mar 25, 4:06 PM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton, Marion, Sequatchie | 86 min |
| Mar 25, 4:14 PM EDT | Special Weather Statement | MRX | Bledsoe | 31 min |
| Mar 25, 5:27 PM EDT | Flash Flood Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 4 hr |
| Mar 25, 6:17 PM EDT | Areal Flood Advisory | MRX | Knox, Loudon | 3 hr |
| Mar 25, 7:17 PM EDT | River Flood Warning | MRX | Cocke | 32 hr |
| Mar 25, 7:57 PM EDT | Areal Flood Advisory | MRX | Polk | 4 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.