Alert archive / Tennessee / Freeze Watches in 2021
Freeze Watch 1, NWS Morristown, TN
NWS Morristown, TN issued this freeze watch at Mar 31, 2021, 3:38 PM EDT for 31 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina. It took effect at Apr 1, 2021, 11:00 PM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Mar 31, 2021, 3:38 PM EDT (19:38 UTC)
- In effect from
- Apr 1, 2021, 11:00 PM EDT
- Expired
- Apr 1, 2021, 9:22 AM EDT
- In force
- Issued by
- NWS Morristown, TN
All 40 counties
Cherokee County, NC, Clay County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Union County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA
The radar
The Knoxville radar (KMRX), 33 km from the middle of the area, began a volume at 19:39 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, 7.6 hours before the alert went out and 259 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 498 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 9:37 PM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Johnson, Monroe and 2 more | 15 hr |
| Mar 31, 4:57 AM EDT | Areal Flood Advisory | MRX | Marion | 2 hr |
| Mar 31, 5:40 AM EDT | Areal Flood Advisory | MRX | Bradley, Hamilton | 3 hr |
| Mar 31, 7:57 AM EDT | Areal Flood Advisory | MRX | Marion | 46 min |
| Mar 31, 8:42 AM EDT | Flash Flood Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 5 hr |
| Mar 31, 8:52 AM EDT | Areal Flood Advisory | MRX | Blount, Jefferson, Loudon, Sevier | 5 hr |
| Mar 31, 8:59 AM EDT | Areal Flood Advisory | MRX | Bledsoe, Rhea, Sequatchie | 4 hr |
| Mar 31, 9:05 AM EDT | Areal Flood Advisory | MRX | Monroe | 5 hr |
| Mar 31, 9:52 AM EDT | Areal Flood Advisory | MRX | Monroe, Polk | 3 hr |
| Mar 31, 10:55 AM EDT | River Flood Warning | MRX | Bledsoe, Marion, Sequatchie | 35 hr |
| Mar 31, 10:57 AM EDT | River Flood Warning | MRX | Hamilton | 47 hr |
| Mar 31, 12:46 PM EDT | River Flood Warning | MRX | Cocke | 22 hr |
| Mar 31, 1:31 PM EDT | Areal Flood Warning | MRX | Bradley, Hamilton, Marion, Sequatchie | 6 hr |
| Mar 31, 2:04 PM EDT | River Flood Warning | MRX | Polk | 14 hr |
| Mar 31, 3:38 PM EDT | Freeze Warning | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 25 more | 17 hr |
| Mar 31, 3:38 PM EDT | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Johnson, Monroe and 3 more | 12 hr |
Nearby
Freeze Watches in Tennessee, 2021Freeze Watches in Virginia, 2021Freeze Watches in North Carolina, 2021Every freeze watch 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.