Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 12, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Mar 28, 2021, 5:36 AM CDT for 4 counties in Tennessee. It was in force for 6 hr. 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
- Mar 28, 2021, 5:36 AM CDT (10:36 UTC)
- Expired
- Mar 28, 2021, 12:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bledsoe County, TN, Marion County, TN, Rhea County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 79 km from the middle of the area, began a volume at 10:37 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 28, 8:30 AM CDT | FLASH FLOOD | Pikeville, TN |
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 00:00Z, 10.6 hours before the alert went out and 134 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
- 200 J/kg
- Mixed-layer CIN
- -290 J/kg
- Mixed-layer LCL
- 839 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 341 m²/s²
- 0-3 km storm-relative helicity
- 458 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.8
The text
As transmitted.
468
WGUS54 KMRX 281036
FFWMRX
TNC007-115-143-153-281500-
/O.NEW.KMRX.FF.W.0012.210328T1036Z-210328T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
536 AM CDT Sun Mar 28 2021
The National Weather Service in Morristown has issued a
* Flash Flood Warning for...
Bledsoe County in east Tennessee...
Marion County in east Tennessee...
Northwestern Rhea County in east Tennessee...
Sequatchie County in east Tennessee...
* Until 1000 AM CDT /1100 AM EDT/.
* At 536 AM CDT /636 AM EDT/, Doppler radar indicated thunderstorms
producing heavy rain across the warned area. Between 1 and 1.5
inches of rain have fallen. Additional rainfall amounts up to 1
inch are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
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...
Chattanooga, Dunlap, Jasper, Pikeville, South Pittsburg, Whitwell,
Kimball, Monteagle, Powells Crossroads, Orme, Palio, Cagle,
Cartwright, Old Cumberland, North Chickamauga Creek Gorge, Lone
Oak, Griffith Creek, Chimneys State Park, Brayton and Martin
Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3532 8556 3538 8549 3549 8554 3553 8561
3557 8542 3577 8525 3577 8504 3575 8503
3582 8480 3546 8512 3545 8516 3545 8517
3515 8539 3507 8537 3501 8543 3499 8586
3522 8586 3522 8574 3524 8569 3529 8571
FLASH FLOOD...RADAR INDICATED
$$
GC2 follow-up statements
561
WGUS54 KMRX 281445
FFWMRX
TNC007-115-143-153-281700-
/O.EXT.KMRX.FF.W.0012.000000T0000Z-210328T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
945 AM CDT Sun Mar 28 2021
The National Weather Service in Morristown has extended the
* Flash Flood Warning for...
Bledsoe County in east Tennessee...
Marion County in east Tennessee...
Northwestern Rhea County in east Tennessee...
Sequatchie County in east Tennessee...
* Until noon CDT /100 PM EDT/.
* At 945 AM CDT /1045 AM EDT/, local law enforcement reported
flooding across the warned area. Between 1 and 2 inches of rain
have fallen. Even though the rain has stopped it will take several
hours for some of the flooding to recede.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Chattanooga, Dunlap, Jasper, Pikeville, South Pittsburg, Whitwell,
Kimball, Monteagle, Powell Crossroads, Orme, Palio, Cagle,
Cartwright, Old Cumberland, North Chickamauga Creek Gorge, Lone
Oak, Griffith Creek, Chimneys State Park, Brayton and Martin
Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3532 8556 3538 8549 3549 8554 3553 8561
3557 8542 3577 8525 3577 8504 3575 8503
3582 8480 3546 8512 3545 8516 3545 8517
3515 8539 3507 8537 3501 8543 3499 8586
3522 8586 3522 8574 3524 8569 3529 8571
FLASH FLOOD...OBSERVED
$$
19250
WGUS74 KMRX 281656
FFSMRX
Flash Flood Statement
National Weather Service Morristown TN
1156 AM CDT Sun Mar 28 2021
TNC007-115-143-153-281706-
/O.EXP.KMRX.FF.W.0012.000000T0000Z-210328T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bledsoe TN-Marion TN-Rhea TN-Sequatchie TN-
1156 AM CDT Sun Mar 28 2021 /1256 PM EDT Sun Mar 28 2021/
...FLASH FLOOD WARNING WILL EXPIRE AT NOON CDT/1 PM EDT/ TODAY FOR
BLEDSOE, MARION, NORTHWESTERN RHEA AND SEQUATCHIE COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
A Flash Flood Watch remains in effect until 700 PM CDT Sunday/800 PM
EDT Sunday for A portion of east Tennessee.
LAT...LON 3532 8556 3538 8549 3549 8554 3553 8561
3557 8542 3577 8525 3577 8504 3575 8503
3582 8480 3546 8512 3545 8516 3545 8517
3515 8539 3507 8537 3501 8543 3499 8586
3522 8586 3522 8574 3524 8569 3529 8571
$$
GCThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 7:05 PM CDT | Severe Thunderstorm Warning | MRX | Campbell, Claiborne, Grainger, Hancock, Union | 40 min |
| Mar 27, 7:09 PM CDT | Flash Flood Warning | MRX | Anderson, Campbell, Claiborne, Morgan, Scott, Union | 3 hr |
| Mar 27, 7:11 PM CDT | Special Weather Statement | MRX | Sequatchie | 49 min |
| Mar 27, 7:12 PM CDT | Special Weather Statement | MRX | Sequatchie | 48 min |
| Mar 27, 7:31 PM CDT | Severe Thunderstorm Warning | MRX | Carter, Johnson, Sullivan | 44 min |
| Mar 27, 7:36 PM CDT | Areal Flood Warning | MRX | Claiborne, Grainger, Hancock, Hawkins, Sullivan, Union | 3 hr |
| Mar 27, 7:43 PM CDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Hamblen, Hancock, Hawkins | 47 min |
| Mar 27, 7:55 PM CDT | Areal Flood Advisory | MRX | Bledsoe, Hamilton, Marion, Rhea, Sequatchie | 3 hr |
| Mar 27, 7:57 PM CDT | Special Weather Statement | MRX | Sullivan | 48 min |
| Mar 27, 8:02 PM CDT | River Flood Warning | MRX | Morgan, Roane | 24 hr |
| Mar 27, 8:10 PM CDT | Special Weather Statement | MRX | Jefferson | 50 min |
| Mar 27, 8:21 PM CDT | Severe Thunderstorm Warning | MRX | Greene, Hamblen, Hawkins, Washington | 39 min |
| Mar 27, 8:22 PM CDT | Special Weather Statement | MRX | Loudon | 38 min |
| Mar 27, 8:25 PM CDT | Special Weather Statement | MRX | Loudon | 50 min |
| Mar 27, 8:42 PM CDT | Special Weather Statement | MRX | Knox | 48 min |
| Mar 27, 8:48 PM CDT | Severe Thunderstorm Warning | MRX | Carter, Greene, Unicoi, Washington | 24 min |
| Mar 27, 8:50 PM CDT | Special Weather Statement | MRX | Johnson | 40 min |
| Mar 27, 9:00 PM CDT | Special Weather Statement | MRX | Greene, Unicoi | 45 min |
| Mar 27, 9:19 PM CDT | Areal Flood Advisory | MRX | Carter, Greene, Hawkins, Sullivan, Washington | 3 hr |
| Mar 27, 9:32 PM CDT | Special Weather Statement | MRX | Anderson, Campbell, Morgan | 43 min |
| Mar 27, 10:13 PM CDT | Flash Flood Warning | MRX | Anderson, Campbell, Claiborne, Morgan, Scott, Union | 3 hr |
| Mar 27, 10:37 PM CDT | Areal Flood Warning | MRX | Claiborne, Grainger, Hancock, Hawkins, Sullivan, Union | 3 hr |
| Mar 27, 11:14 PM CDT | Special Weather Statement | MRX | Claiborne, Grainger, Union | 46 min |
| Mar 27, 11:18 PM CDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Grainger, Union | 57 min |
| Mar 27, 11:35 PM CDT | Special Weather Statement | MRX | Campbell, Morgan, Scott | 40 min |
| Mar 27, 11:41 PM CDT | Special Weather Statement | MRX | Grainger, Hamblen | 34 min |
| Mar 27, 11:55 PM CDT | Special Weather Statement | MRX | Hamblen, Hancock, Hawkins | 50 min |
| Mar 28, 12:14 AM CDT | Flash Flood Warning | MRX | Claiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more | 3 hr |
| Mar 28, 12:18 AM CDT | Special Weather Statement | MRX | Campbell, Claiborne, Union | 42 min |
| Mar 28, 12:39 AM CDT | Special Weather Statement | MRX | Sullivan | 51 min |
| Mar 28, 12:43 AM CDT | Areal Flood Warning | MRX | Carter, Johnson, Sullivan, Washington | 3 hr |
| Mar 28, 12:47 AM CDT | Severe Thunderstorm Warning | MRX | Greene, Hawkins, Sullivan, Washington | 43 min |
| Mar 28, 1:11 AM CDT | Flash Flood Warning | MRX | Anderson, Campbell, Claiborne, Morgan, Scott, Union | 3 hr |
| Mar 28, 1:18 AM CDT | Severe Thunderstorm Warning | MRX | Johnson, Sullivan | 42 min |
| Mar 28, 1:58 AM CDT | Flash Flood Warning | MRX | Carter, Johnson, Sullivan, Washington | 3 hr |
| Mar 28, 2:12 AM CDT | Special Weather Statement | MRX | Morgan, Scott | 48 min |
| Mar 28, 3:04 AM CDT | Flash Flood Warning | MRX | Claiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more | 7 hr |
| Mar 28, 3:09 AM CDT | Special Weather Statement | MRX | Campbell, Morgan, Scott | 51 min |
| Mar 28, 3:16 AM CDT | Flash Flood Warning | MRX | Sullivan | 3 hr |
| Mar 28, 3:27 AM CDT | Special Weather Statement | MRX | Bledsoe | 63 min |
| Mar 28, 3:58 AM CDT | Special Weather Statement | MRX | Anderson, Campbell, Claiborne, Morgan | 47 min |
| Mar 28, 4:03 AM CDT | Special Weather Statement | MRX | Meigs, Rhea, Roane | 42 min |
| Mar 28, 4:07 AM CDT | Flash Flood Warning | MRX | Anderson, Campbell, Claiborne, Morgan, Scott, Union | 5 hr |
| Mar 28, 4:15 AM CDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Union | 17 min |
| Mar 28, 4:26 AM CDT | Areal Flood Advisory | MRX | Bledsoe, Rhea, Sequatchie | 71 min |
| Mar 28, 4:38 AM CDT | Special Weather Statement | MRX | Grainger, Hancock, Union | 52 min |
| Mar 28, 4:43 AM CDT | Special Weather Statement | MRX | Anderson, Knox | 47 min |
| Mar 28, 4:43 AM CDT | Severe Thunderstorm Warning | MRX | Marion | 47 min |
| Mar 28, 4:48 AM CDT | Special Weather Statement | MRX | Meigs, Rhea, Roane | 42 min |
| Mar 28, 5:08 AM CDT | Special Weather Statement | MRX | Hawkins | 52 min |
| Mar 28, 5:19 AM CDT | Special Weather Statement | MRX | Hamilton, McMinn | 41 min |
| Mar 28, 5:34 AM CDT | Special Weather Statement | MRX | Grainger, Hamblen, Hancock, Hawkins, Jefferson, Sevier | 41 min |
| Mar 28, 5:40 AM CDT | Flash Flood Warning | MRX | Anderson, Knox, Loudon, Morgan, Roane, Union | 5 hr |
| Mar 28, 5:43 AM CDT | Special Weather Statement | MRX | Knox, Loudon, Meigs, Roane | 47 min |
| Mar 28, 5:51 AM CDT | Special Weather Statement | MRX | Bradley, McMinn, Monroe, Polk | 39 min |
| Mar 28, 6:08 AM CDT | Flash Flood Warning | MRX | Sullivan | 6 hr |
| Mar 28, 6:15 AM CDT | Special Weather Statement | MRX | Cocke, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more | 45 min |
| Mar 28, 6:17 AM CDT | Flash Flood Warning | MRX | Bradley, Hamilton, McMinn, Meigs, Rhea, Sequatchie | 6 hr |
| Mar 28, 6:27 AM CDT | Special Weather Statement | MRX | Blount, Sevier | 33 min |
| Mar 28, 6:27 AM CDT | Special Weather Statement | MRX | Polk | 63 min |
| Mar 28, 6:34 AM CDT | River Flood Warning | MRX | Claiborne, Grainger, Hancock | 51 hr |
| Mar 28, 6:41 AM CDT | River Flood Warning | MRX | Claiborne, Union | 52 hr |
| Mar 28, 6:46 AM CDT | River Flood Warning | MRX | Hawkins, Sullivan | 35 hr |
| Mar 28, 6:49 AM CDT | Flash Flood Warning | MRX | Grainger, Hamblen, Jefferson, Knox, Sevier | 5 hr |
| Mar 28, 6:52 AM CDT | Flash Flood Warning | MRX | Bradley, Hamilton, Polk | 5 hr |
| Mar 28, 7:00 AM CDT | Special Weather Statement | MRX | Carter, Cocke, Greene, Hawkins, Sullivan, Unicoi and 1 more | 45 min |
| Mar 28, 7:03 AM CDT | Flash Flood Warning | MRX | Blount, Knox, Loudon, McMinn, Monroe, Polk and 1 more | 4 hr |
| Mar 28, 7:21 AM CDT | Special Weather Statement | MRX | Sevier | 24 min |
| Mar 28, 7:26 AM CDT | Flash Flood Warning | MRX | Blount, Cocke, Sevier | 5 hr |
| Mar 28, 7:43 AM CDT | Flash Flood Warning | MRX | Greene, Hawkins, Unicoi, Washington | 4 hr |
| Mar 28, 7:45 AM CDT | Flash Flood Warning | MRX | Carter, Johnson | 4 hr |
| Mar 28, 8:05 AM CDT | River Flood Warning | MRX | Hancock | 23 hr |
| Mar 28, 8:32 AM CDT | River Flood Warning | MRX | Cocke | 20 hr |
| Mar 28, 9:08 AM CDT | Areal Flood Warning | MRX | Anderson, Campbell, Claiborne, Morgan, Scott, Union | 21 hr |
| Mar 28, 10:07 AM CDT | River Flood Warning | MRX | Hancock | 33 hr |
| Mar 28, 10:10 AM CDT | Areal Flood Warning | MRX | Claiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more | 21 hr |
| Mar 28, 10:11 AM CDT | Areal Flood Warning | MRX | Claiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more | 20 hr |
| Mar 28, 10:43 AM CDT | Areal Flood Warning | MRX | Anderson, Knox, Loudon, Morgan, Roane | 3 hr |
| Mar 28, 11:38 AM CDT | Areal Flood Warning | MRX | Greene, Hawkins, Unicoi, Washington | 3 hr |
| Mar 28, 11:43 AM CDT | Areal Flood Warning | MRX | Carter, Johnson | 5 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.