Alert archive / Tennessee / Flash Flood Watches in 2020
Flash Flood Watch 4, NWS Morristown, TN
NWS Morristown, TN issued this flash flood watch at Mar 24, 2020, 3:31 AM CDT for 11 counties in Tennessee; Cherokee County, Clay County, North Carolina. It took effect at Mar 24, 2020, 7:00 AM CDT. It was in force for 19 hr.
The area
The counties it named.
The facts
- Issued
- Mar 24, 2020, 3:31 AM CDT (08:31 UTC)
- In effect from
- Mar 24, 2020, 7:00 AM CDT
- Expired
- Mar 25, 2020, 2:22 AM CDT
- In force
- 19 hr
- Issued by
- NWS Morristown, TN
- Flood severity
- None
Counties Cherokee County, NC, Clay County, NC, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Hamilton County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 134 km from the middle of the area, began a volume at 08:33 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
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 8.5 hours before the alert went out and 220 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
- 180 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 697 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 280 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.8
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at Mar 24, 3:26 AM CDT, 5 minutes earlier.
Area forecast discussion, Mar 24, 3:26 AM CDT, 5 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 |
|---|---|---|---|---|
| Mar 24, 8:50 AM CDT | Special Weather Statement | MRX | Polk | 55 min |
| Mar 24, 9:32 AM CDT | River Flood Warning | MRX | Hamilton | 53 hr |
| Mar 24, 5:04 PM CDT | Special Weather Statement | MRX | Campbell | 41 min |
| Mar 24, 5:41 PM CDT | Special Weather Statement | MRX | Claiborne, Hancock | 49 min |
| Mar 24, 9:44 AM CDT | Special Weather Statement | MRX | Cherokee | 61 min |
Nearby
Flash Flood Watches in Tennessee, 2020Flash Flood Watches in North Carolina, 2020Every flash flood watch in 2020
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.