Alert archive / Tennessee / Flash Flood Warnings in 2023
Flash Flood Warning 27, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Aug 3, 2023, 4:21 PM EDT for Greene 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 counties it named.
The facts
- Issued
- Aug 3, 2023, 4:21 PM EDT (20:21 UTC)
- Expired
- Aug 3, 2023, 7:30 PM EDT
- In force
- 3 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Greene County, TN
The radar
The Knoxville radar (KMRX), 50 km from the middle of the area, began a volume at 20:24 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, 8.4 hours before the alert went out and 337 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
- 89 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 874 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Morristown, TN wrote its last area forecast discussion before this flash flood warning went out at Aug 3, 3:23 PM EDT, 58 minutes earlier.
Area forecast discussion, Aug 3, 3:23 PM EDT, 58 minutes before
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</html>Hazardous weather outlook, Aug 3, 3:04 PM EDT, 1 hour 17 minutes before
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Local storm report, Aug 3, 4:03 PM EDT, 18 minutes before
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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 3:24 AM EDT | Areal Flood Advisory | MRX | Claiborne, Grainger, Hancock, Hawkins | 70 min |
| Aug 3, 4:34 AM EDT | Flash Flood Warning | MRX | Claiborne, Grainger, Hancock, Hawkins | 116 min |
| Aug 3, 6:35 AM EDT | Areal Flood Advisory | MRX | Cocke, Greene, Hamblen, Hawkins, Jefferson | 7 hr |
| Aug 3, 9:37 AM EDT | Areal Flood Advisory | MRX | Cocke, Greene, Unicoi, Washington | 4 hr |
| Aug 3, 3:02 PM EDT | Areal Flood Advisory | MRX | Anderson, Blount, Knox, Loudon, Roane, Sevier | 118 min |
| Aug 3, 3:02 PM EDT | Areal Flood Advisory | MRX | Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson | 4 hr |
| Aug 3, 3:33 PM EDT | Flash Flood Warning | MRX | Cocke, Greene, Hamblen, Jefferson | 4 hr |
| Aug 3, 4:31 PM EDT | Areal Flood Advisory | MRX | Greene, Hawkins, Sullivan, Washington | 3 hr |
| Aug 3, 7:34 PM EDT | Areal Flood Warning | MRX | Greene | 2 hr |
Nearby
Flash Flood Warnings in Tennessee, 2023Every flash flood warning in 2023
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.