Alert archive / Tennessee / Frost Advisories in 2017
Frost Advisory 5, NWS Morristown, TN
NWS Morristown, TN issued this frost advisory at Oct 25, 2017, 3:48 AM EDT for 10 counties in Tennessee; 7 counties in Virginia. It took effect at Oct 26, 2017, 2:00 AM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Oct 25, 2017, 3:48 AM EDT (07:48 UTC)
- In effect from
- Oct 26, 2017, 2:00 AM EDT
- Expired
- Oct 26, 2017, 9:00 AM EDT
- In force
- 7 hr
- Issued by
- NWS Morristown, TN
Counties Campbell County, TN, Carter County, TN, Claiborne County, TN, Greene County, TN, Hancock County, TN, Hawkins County, TN, Morgan County, TN, Scott County, TN, Sullivan 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), 58 km from the middle of the area, began a volume at 07:51 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 7.8 hours before the alert went out and 278 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
- 1631 m above ground
- 0-6 km bulk shear
- 83 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this frost advisory 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 frost advisory went out at Oct 24, 7:44 PM EDT, 8 hours 4 minutes earlier.
Area forecast discussion, Oct 24, 7:44 PM EDT, 8 hours 4 minutes before
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</html>Hazardous weather outlook, Oct 24, 3:08 PM EDT, 12 hours 40 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 |
|---|---|---|---|---|
| Oct 25, 3:48 AM EDT | Freeze Warning | MRX | Blount, Carter, Cocke, Greene, Johnson, Monroe and 2 more | 29 hr |
Nearby
Frost Advisories in Tennessee, 2017Frost Advisories in Virginia, 2017Every frost advisory in 2017
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.