Alert archive / Tennessee / Areal Flood Warnings in 2012
Areal Flood Warning 4, NWS Morristown, TN
NWS Morristown, TN issued this areal flood warning at Sep 18, 2012, 6:35 AM EDT for 4 counties in Tennessee. It was in force for 6 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
- Sep 18, 2012, 6:35 AM EDT (10:35 UTC)
- Expired
- Sep 18, 2012, 12:30 PM EDT
- In force
- 6 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Blount County, TN, Knox County, TN, Loudon County, TN, Monroe County, TN
The radar
The Knoxville radar (KMRX), 81 km from the middle of the area, began a volume at 10:36 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, 10.6 hours before the alert went out and 263 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
- 405 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.2
What forecasters said that day
The local office's own words before this areal 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 areal flood warning went out at Sep 17, 7:36 PM EDT, 10 hours 59 minutes earlier.
Area forecast discussion, Sep 17, 7:36 PM EDT, 10 hours 59 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 |
|---|---|---|---|---|
| Sep 17, 8:37 PM EDT | Areal Flood Advisory | MRX | Bledsoe, Bradley, Hamilton, McMinn, Marion, Meigs and 3 more | 3 hr |
| Sep 18, 12:28 AM EDT | Areal Flood Advisory | MRX | Anderson, Bledsoe, Bradley, Campbell, Claiborne, Hamilton and 7 more | 6 hr |
| Sep 18, 2:24 AM EDT | Areal Flood Warning | MRX | Hamilton | 6 hr |
| Sep 18, 2:59 AM EDT | Areal Flood Advisory | MRX | Anderson, Blount, Campbell, Claiborne, Grainger, Hamblen and 10 more | 3 hr |
| Sep 18, 6:00 AM EDT | Areal Flood Advisory | MRX | Blount, Bradley, Cocke, Grainger, Hamilton, Jefferson and 6 more | 3 hr |
| Sep 18, 8:22 AM EDT | Areal Flood Warning | MRX | Bradley, Hamilton, McMinn, Meigs, Monroe, Rhea | 3 hr |
| Sep 18, 9:00 AM EDT | Areal Flood Advisory | MRX | Claiborne, Grainger, Hamblen, Hancock, Hawkins, Jefferson and 2 more | 3 hr |
Nearby
Areal Flood Warnings in Tennessee, 2012Every areal flood warning in 2012
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.