Alert archive / Tennessee / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 108, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Nov 7, 2017, 10:27 AM EST for Bradley County, Polk County, Tennessee. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Nov 7, 2017, 10:27 AM EST (15:27 UTC)
- Expired
- Nov 7, 2017, 11:00 AM EST
- In force
- 33 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bradley County, TN, Polk County, TN
The radar
The Northeast Alabama radar (KHTX), 129 km from the middle of the area, began a volume at 15:30 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 12:00Z, 3.5 hours before the alert went out and 197 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
- 28 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 866 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Nov 7, 9:58 AM EST, 29 minutes earlier.
Area forecast discussion, Nov 7, 9:58 AM EST, 29 minutes before
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</html>Hazardous weather outlook, Nov 7, 4:04 AM EST, 6 hours 23 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 404 AM EST Tue Nov 7 2017 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-080915- Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins- Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen- Northwest Cocke-Cocke Smoky Mountains-Northwest Greene- Southeast Greene-Washington TN-Unicoi-Northwest Carter- Southeast Carter-Roane-Loudon-Knox-Jefferson-NW Blount- Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains- Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe- Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee- Wise-Scott-Russell-Washington- 404 AM EST Tue Nov 7 2017 /304 AM CST Tue Nov 7 2017/ This Hazardous Weather Outlook is for portions of Southwest North Carolina...East Tennessee and Southwest Virginia. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. However, ongoing showers and thunderstorms may generate areas heavy rainfall and create localized flooding. .DAYS TWO THROUGH SEVEN...Wednesday through Monday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, Nov 7, 10:07 AM EST, 20 minutes before
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</html>Local storm report, Nov 7, 10:08 AM EST, 19 minutes before
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</html>Local storm report, Nov 7, 10:16 AM EST, 11 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 |
|---|---|---|---|---|
| Nov 7, 3:50 AM EST | Areal Flood Advisory | MRX | Bledsoe, Rhea, Roane | 3 hr |
| Nov 7, 5:33 AM EST | Areal Flood Advisory | MRX | Blount, Loudon | 3 hr |
| Nov 7, 5:47 AM EST | Areal Flood Advisory | MRX | Bledsoe, Rhea | 3 hr |
| Nov 7, 8:13 AM EST | Areal Flood Advisory | MRX | Loudon, Roane | 3 hr |
| Nov 7, 8:29 AM EST | Areal Flood Advisory | MRX | Blount | 3 hr |
| Nov 7, 10:07 AM EST | Special Weather Statement | MRX | Bradley | 53 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2017Every severe thunderstorm warning 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.