Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 39, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Sep 18, 2021, 5:20 PM CDT for Bledsoe County, Sequatchie County, Tennessee. It was in force for 3 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
- Sep 18, 2021, 5:20 PM CDT (22:20 UTC)
- Expired
- Sep 18, 2021, 8:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bledsoe County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 89 km from the middle of the area, began a volume at 22:23 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 |
|---|---|---|---|
| Sep 18, 6:45 PM CDT | FLASH FLOOD | 3 Nne Dunlap, TN | FLOODING ONGOING BUT STARTING TO IMPROVE. |
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 126 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
- 1085 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 648 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
701
WGUS54 KMRX 182220
FFWMRX
TNC007-153-190130-
/O.NEW.KMRX.FF.W.0039.210918T2220Z-210919T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
520 PM CDT Sat Sep 18 2021
The National Weather Service in Morristown has issued a
* Flash Flood Warning for...
Southwestern Bledsoe County in east Tennessee...
Northeastern Sequatchie County in east Tennessee...
* Until 830 PM CDT.
* At 520 PM CDT, local law enforcement reported flash flooding was
ongoing after the heavy rain from thunderstorms earlier today.
Between 2 and 4 inches of rain have fallen. Additional rainfall
amounts up to 0.5 inches are possible in the warned area. Flash
flooding is already occurring and some evacuations are taking
place.
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...
Dunlap, Pikeville, Palio, Old Cumberland, Cagle and Fall Creek
Falls State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3534 8529 3553 8556 3554 8555 3554 8554
3554 8553 3555 8550 3555 8546 3556 8545
3557 8542 3565 8533 3557 8514
FLASH FLOOD...OBSERVED
$$
GCThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 11:47 AM CDT | Areal Flood Advisory | MRX | Anderson, Morgan, Scott | 118 min |
| Sep 18, 1:55 PM CDT | Areal Flood Advisory | MRX | Bledsoe, Sequatchie | 110 min |
| Sep 18, 2:17 PM CDT | Flash Flood Warning | MRX | Bledsoe, Sequatchie | 3 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.