Alert archive / Tennessee / Flash Flood Warnings in 2021
Flash Flood Warning 38, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Sep 18, 2021, 2:17 PM CDT for Bledsoe County, Sequatchie County, Tennessee. It was in force for 3 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
- Sep 18, 2021, 2:17 PM CDT (19:17 UTC)
- Expired
- Sep 18, 2021, 5:15 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), 91 km from the middle of the area, began a volume at 19:20 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, 7.3 hours before the alert went out and 128 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.
775
WGUS54 KMRX 181917
FFWMRX
TNC007-153-182215-
/O.NEW.KMRX.FF.W.0038.210918T1917Z-210918T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Morristown TN
217 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...
North Central Sequatchie County in east Tennessee...
* Until 515 PM CDT.
* At 217 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 3.5 inches of
rain have fallen, and additional rain is occurring. 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...
Pikeville, Old Cumberland, Palio 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 3545 8540 3553 8555 3554 8552 3555 8546
3556 8545 3557 8542 3565 8534 3557 8514
3541 8525
FLASH FLOOD...RADAR INDICATED
$$The 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, 5:20 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.