Alert archive / Virginia / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 157, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Aug 28, 2020, 7:20 PM EDT for Russell County, Washington County, Virginia. It was in force for 36 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
- Aug 28, 2020, 7:20 PM EDT (23:20 UTC)
- Expired
- Aug 28, 2020, 7:56 PM EDT
- In force
- 36 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Russell County, VA, Washington County, VA
The radar
The Jackson,KY radar (KJKL), 142 km from the middle of the area, began a volume at 23:24 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.3 hours before the alert went out and 328 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
- 985 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 1127 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.0
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 Aug 28, 3:49 PM EDT, 3 hours 31 minutes earlier.
Area forecast discussion, Aug 28, 3:49 PM EDT, 3 hours 31 minutes before
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</html>Hazardous weather outlook, Aug 28, 3:41 AM EDT, 15 hours 39 minutes before
Hazardous Weather Outlook National Weather Service Morristown TN 341 AM EDT Fri Aug 28 2020 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-290745- Cherokee-Clay-Scott-Campbell-Claiborne-Hancock-Hawkins-Sullivan- Johnson-Morgan-Anderson-Union-Grainger-Hamblen-Northwest Cocke- Cocke Smoky Mountains-Northwest Greene-Southeast Greene- Washington-Unicoi-Northwest Carter-Southeast Carter-Roane-Loudon- Knox-Jefferson-Northwest 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-Russell- 341 AM EDT Fri Aug 28 2020 /241 AM CDT Fri Aug 28 2020/ This Hazardous Weather Outlook is for portions of southwest North Carolina...east Tennessee and southwest Virginia. .DAY ONE...Today and Tonight Scattered showers and thunderstorms will present a risk of locally heavy rain and gusty winds this afternoon and evening mainly across the southern Cumberland Plateau and southern valley. Widespread rainfall will increase across the area tonight from the remnants of Hurricane Laura. This rainfall may cause localized flooding of creeks and streams, as well as low-lying and poor drainage areas. Additionally, there is a threat for a weak brief isolated tornado or two during the pre-dawn hours on Saturday morning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Widespread rainfall will continue Saturday morning which could lead to localized flooding of creeks and streams, as well as low- lying and poor drainage areas. The rain will quickly end Saturday afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation is not needed at this time. Reports of severe weather or flooding are encouraged.
In the hours before
Special weather statement, Aug 28, 4:47 PM EDT, 2 hours 33 minutes before
Special Weather Statement
National Weather Service Morristown TN
447 PM EDT Fri Aug 28 2020
TNZ018-282130-
Johnson TN-
447 PM EDT Fri Aug 28 2020
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL JOHNSON COUNTY UNTIL 530
PM EDT...
At 447 PM EDT, Doppler radar was tracking a strong thunderstorm over
Mountain City, moving northeast at 30 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Mountain City, Neva and Laurel Bloomery.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3659 8168 3657 8168 3657 8169 3655 8169
3653 8171 3647 8170 3646 8171 3642 8172
3641 8174 3638 8173 3633 8187 3647 8195
3649 8197 3661 8173 3661 8165
TIME...MOT...LOC 2047Z 242DEG 25KT 3645 8184
05/MASpecial weather statement, Aug 28, 5:22 PM EDT, 1 hour 58 minutes before
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</html>Special weather statement, Aug 28, 6:56 PM EDT, 24 minutes before
Special Weather Statement
National Weather Service Morristown TN
656 PM EDT Fri Aug 28 2020
TNZ017-VAZ008-282345-
Sullivan TN-Washington VA-
656 PM EDT Fri Aug 28 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN SULLIVAN AND EASTERN
WASHINGTON COUNTIES AND THE EASTERN CITY OF BRISTOL UNTIL 745 PM
EDT...
At 656 PM EDT, Doppler radar was tracking a strong thunderstorm near
Bristol Va, moving northeast at 15 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Bristol Tn, Bristol Va, Abingdon, Glade Spring, Damascus, Lindell,
Hilander Park, Emory-Meadow View and Harr.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3661 8183 3660 8187 3658 8188 3657 8193
3655 8193 3650 8203 3664 8218 3687 8193
3689 8189 3669 8168
TIME...MOT...LOC 2256Z 228DEG 14KT 3662 8204
05/MAThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 4:47 PM EDT | Special Weather Statement | MRX | Johnson | 43 min |
| Aug 28, 5:22 PM EDT | Special Weather Statement | MRX | Carter | 38 min |
| Aug 28, 6:56 PM EDT | Special Weather Statement | MRX | Washington | 49 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2020Every severe thunderstorm warning 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.