Alert archive / Virginia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 194, NWS Morristown, TN

September 9, 20184 counties in Tennessee; 5 counties in Virginia

NWS Morristown, TN issued this severe thunderstorm warning at Sep 9, 2018, 7:12 PM EDT for 4 counties in Tennessee; 5 counties in Virginia. It was in force for 78 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: Sep 9, 2018, 7:12 PM EDT (23:12 UTC)
Expired: Sep 9, 2018, 8:30 PM EDT
In force: 78 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Carter County, TN, Hawkins County, TN, Johnson County, TN, Sullivan County, TN, City of Bristol, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 111 km from the middle of the area, began a volume at 23:15 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.

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 Sep 9, 3:33 PM EDT, 3 hours 39 minutes earlier.

Area forecast discussion, Sep 9, 3:33 PM EDT, 3 hours 39 minutes before

Area Forecast Discussion
National Weather Service Morristown TN
333 PM EDT Sun Sep 9 2018

.SHORT TERM...(Tonight and Monday)...
A cold front, currently located near Nashville, will slowly move
into the area from the west tonight. Training cells may give a small
risk of localized flooding problems through the evening. Lightning
activity will remain isolated. With the mid to upper level flow from
SW to NE, parallel to the front, the front will make very slow
eastward progress through tomorrow, becoming positioned along the
spine of the Appalachians by the end of the day. With a moist air
mass to the east of it, PoPs will remain in the high chance to
likely range, with QPF amounts averaging around a half inch in the
eastern sections. Broken to overcast cloud cover through the day
will hold high temps in the 70s to lower 80s.

.LONG TERM...(Monday night through Sunday)...
The forecast starts out with a relatively decent pop due to the
early week frontal boundary in the vicinity. Trended pops back a
bit later Tuesday afternoon through Tuesday night, as convergence
weakens along the boundary. On Wednesday, models try to bring a
weak upper level wave back into the Mid Mississippi Valley region
with some low level troughiness developing across the Mid South.
Because there will be some instability and lift present from this
weak system, used a broadbrushed pop for showers and thunderstorms
and generally maintained this idea into Thursday with a
decreasing pop trend into the weekend. The latter part of the
forecast gets a little interesting with Florence predicted to move
onshore along the Southeast Atlantic Coast, with with the center
line path of the confidence cone indicating that the rather strong
tropical circulation may cross the North Carolina border just
north of the Greater Myrtle Beach area in South Carolina sometime
Friday morning. For our late week weather, tried to stay with a
scenario that utilizes increasing subsidence along with a slightly
drier easterly or northeasterly flow ahead of Florence. Of course
there is still a fair amount of uncertainty in this forecast, and
late week weather conditions will come into better focus in the
next few days. Temperatures will remain rather warm in the
extended, with highs and lows several degrees above normal;
especially later in the week, if the drying and subsidence concept
occurs.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             72  79  67  85 /  80  50  20  20
Knoxville McGhee Tyson Airport, TN  70  79  65  84 /  80  50  30  40
Oak Ridge, TN                       70  77  65  84 /  80  50  20  20
Tri Cities Airport, TN              69  79  64  84 /  60  70  40  40

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...None.
TN...None.
VA...None.
&&

Hazardous weather outlook, Sep 9, 3:06 PM EDT, 4 hours 6 minutes before

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In the hours before

Special weather statement, Sep 9, 6:21 PM EDT, 51 minutes before

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Special weather statement, Sep 9, 6:25 PM EDT, 47 minutes before

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Local storm report, Sep 9, 6:26 PM EDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
626 PM EDT SUN SEP 9 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0625 PM     TSTM WND DMG     2 W GREENEVILLE         36.17N 82.85W
09/09/2018                   GREENE             TN   911 CALL CENTER

            A FEW TREES DOWN JUST WEST OF THE GREENEVILLE, TN AREA.

&&

DH

Special weather statement, Sep 9, 7:06 PM EDT, 6 minutes before

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Local storm report, Sep 9, 7:09 PM EDT, 3 minutes before

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Local storm report, Sep 9, 7:12 PM EDT, 0 minutes before

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The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 9, 4:01 PM EDT	Special Weather Statement	MRX	Loudon	44 min
Sep 9, 4:08 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon, Roane	52 min
Sep 9, 4:21 PM EDT	Special Weather Statement	MRX	Hamilton	54 min
Sep 9, 4:55 PM EDT	Special Weather Statement	MRX	Knox, Union	35 min
Sep 9, 5:20 PM EDT	Special Weather Statement	MRX	Greene, Hamblen, Jefferson	40 min
Sep 9, 5:51 PM EDT	Special Weather Statement	MRX	Morgan, Roane, Scott	39 min
Sep 9, 5:53 PM EDT	Special Weather Statement	MRX	Greene, Hawkins	52 min
Sep 9, 6:08 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hawkins, Washington	52 min
Sep 9, 6:21 PM EDT	Special Weather Statement	MRX	Hancock, Hawkins	39 min
Sep 9, 6:25 PM EDT	Special Weather Statement	MRX	Anderson, Campbell, Morgan, Roane, Scott	50 min
Sep 9, 6:42 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hancock, Hawkins, Sullivan, Washington	48 min
Sep 9, 6:48 PM EDT	Areal Flood Advisory	MRX	Greene, Sullivan, Washington	117 min
Sep 9, 7:06 PM EDT	Special Weather Statement	MRX	Anderson, Campbell, Union	39 min
Sep 9, 7:17 PM EDT	Special Weather Statement	MRX	Blount, Sevier	58 min
Sep 9, 5:59 PM EDT	Special Weather Statement	MRX	Russell	46 min
Sep 9, 6:09 PM EDT	Severe Thunderstorm Warning	MRX	Russell	51 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2018 Severe Thunderstorm Warnings in Tennessee, 2018 Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.