Alert archive / Tennessee / Flash Flood Warnings in 2026
Flash Flood Warning 55, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Aug 4, 2026, 3:05 PM EDT for 4 counties in 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 counties it named.
The facts
- Issued
- Aug 4, 2026, 3:05 PM EDT (19:05 UTC)
- Expired
- Aug 4, 2026, 6:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Carter County, TN, Sullivan County, TN, Unicoi County, TN, Washington County, TN
The radar
The Knoxville radar (KMRX), 96 km from the middle of the area, began a volume at 19:06 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.
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 7.1 hours before the alert went out and 272 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
- 22 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 667 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 2:18 PM EDT | Special Weather Statement | MRX | Washington | 42 min |
| Aug 4, 2:20 PM EDT | Special Weather Statement | MRX | Cocke | 40 min |
| Aug 4, 3:08 PM EDT | Special Weather Statement | MRX | Greene | 52 min |
| Aug 4, 3:57 PM EDT | Areal Flood Advisory | MRX | Cocke, Greene | 107 min |
| Aug 4, 4:02 PM EDT | Special Weather Statement | MRX | Hawkins | 43 min |
| Aug 4, 4:09 PM EDT | Special Weather Statement | MRX | Sevier | 51 min |
| Aug 4, 4:44 PM EDT | Areal Flood Advisory | MRX | Carter, Johnson, Sullivan | 113 min |
| Aug 4, 4:57 PM EDT | Special Weather Statement | MRX | Knox | 48 min |
| Aug 4, 6:04 PM EDT | Areal Flood Advisory | MRX | Monroe | 116 min |
| Aug 4, 6:34 PM EDT | Special Weather Statement | MRX | Polk | 41 min |
| Aug 4, 6:43 PM EDT | Areal Flood Advisory | MRX | Polk | 2 hr |
| Aug 4, 5:43 PM EDT | Special Weather Statement | MRX | Cherokee | 47 min |
Nearby
Flash Flood Warnings in Tennessee, 2026Every flash flood warning in 2026
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.