Alert archive / Tennessee / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 14, NWS Morristown, TN

May 3, 2019Greene County, Washington County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 3, 2019, 1:37 PM EDT for Greene County, Washington County, Tennessee. It was in force for 53 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: May 3, 2019, 1:37 PM EDT (17:37 UTC)
Expired: May 3, 2019, 2:30 PM EDT
In force: 53 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Greene County, TN, Washington County, TN

The radar

The Knoxville radar (KMRX), 66 km from the middle of the area, began a volume at 17:38 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

Roanoke, VA (KRNK), launched 12:00Z, 5.6 hours before the alert went out and 302 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 May 3, 12:26 PM EDT, 1 hour 11 minutes earlier.

Area forecast discussion, May 3, 12:26 PM EDT, 1 hour 11 minutes before

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Hazardous weather outlook, May 3, 4:33 AM EDT, 9 hours 4 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
433 AM EDT Fri May 3 2019

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-040845-
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-
433 AM EDT Fri May 3 2019 /333 AM CDT Fri May 3 2019/

This Hazardous Weather Outlook is for portions of southwest North
Carolina...east Tennessee and southwest Virginia.

.DAY ONE...Today and Tonight

A relatively well developed upper level system will build
northeast across the Southern Appalachian region on Friday.
Showers and thunderstorms will develop in association with this
feature, and few storms could approach severe limits mainly
across the northern half of the forecast area during the day.
These storms could produce some strong gusts and possibly small
hail.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

A cold front will move through the eastern Tennessee Valley and
Southern Appalachians Saturday and Saturday night. The air mass
will become unstable with increased moisture ahead of the front.
Isolated strong to marginally severe storms could develop with
damaging wind gusts late Saturday. Locally heavy rainfall is
possible with the thunderstorms late Saturday afternoon and
Saturday night. Potential for training storms or stronger
individual cells could lead to some localized flash flooding from
heavy rain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed on Saturday.

In the hours before

Special weather statement, May 3, 7:56 AM EDT, 5 hours 41 minutes before

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Special weather statement, May 3, 8:29 AM EDT, 5 hours 8 minutes before

Special Weather Statement
National Weather Service Morristown TN
829 AM EDT Fri May 3 2019

TNZ068-071-086-031315-
Northwest Monroe TN-Loudon TN-NW Blount TN-
829 AM EDT Fri May 3 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LOUDON...
SOUTHWESTERN BLOUNT AND NORTHERN MONROE COUNTIES UNTIL 915 AM EDT...

At 829 AM EDT, Doppler radar was tracking a strong thunderstorm near
Athens, moving northeast at 35 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Sweetwater, Loudon, Madisonville, Vonore, Greenback, Friendsville,
Philadelphia, Fort Loudon State Park, Tariffville, McGee Carson
Peninsula, Happy Valley, Citico Beach, Mount Vernon, Clover Hill,
Talassee and Tellico Village.

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 3540 8441 3540 8443 3543 8444 3545 8443
      3546 8445 3546 8444 3557 8450 3559 8450
      3583 8419 3579 8416 3580 8414 3582 8414
      3561 8395 3558 8398 3537 8441
TIME...MOT...LOC 1229Z 233DEG 30KT 3545 8450

CDG

Special weather statement, May 3, 10:48 AM EDT, 2 hours 49 minutes before

Special Weather Statement
National Weather Service Morristown TN
1048 AM EDT Fri May 3 2019

TNZ068-071-072-086-087-031545-
Blount Smoky Mountains TN-Northwest Monroe TN-Loudon TN-NW Blount TN-
Southeast Monroe TN-
1048 AM EDT Fri May 3 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LOUDON...BLOUNT AND
NORTHEASTERN MONROE COUNTIES UNTIL 1145 AM EDT...

At 1047 AM EDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Madisonville, moving northeast at 20 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Maryville, Alcoa, Louisville, Rockford, Eagleton Village, Smoky
Mountains-Twentymile Creek, Smoky Mountains-Fontana Area, Vonore,
Greenback, Friendsville, Townsend, McGee Carson Peninsula, Walland,
Clover Hill, Cades Cove, Fort Loudon State Park, Tariffville, Happy
Valley, Wildwood and Citico Beach.

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 3558 8434 3588 8395 3585 8391 3584 8385
      3589 8379 3581 8374 3580 8375 3571 8370
      3571 8368 3569 8368 3569 8366 3557 8366
      3556 8377 3552 8383 3552 8388 3547 8392
      3545 8397 3542 8423
TIME...MOT...LOC 1447Z 241DEG 19KT 3554 8420

Garuckas

Special weather statement, May 3, 11:38 AM EDT, 1 hour 59 minutes before

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Special weather statement, May 3, 12:16 PM EDT, 1 hour 21 minutes before

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Special weather statement, May 3, 12:56 PM EDT, 41 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
May 2, 9:56 PM EDT	Special Weather Statement	MRX	Greene	49 min
May 3, 7:13 AM EDT	Special Weather Statement	MRX	Loudon, McMinn, Meigs, Roane	47 min
May 3, 7:26 AM EDT	Special Weather Statement	MRX	Sequatchie	49 min
May 3, 7:56 AM EDT	Special Weather Statement	MRX	McMinn	49 min
May 3, 8:29 AM EDT	Special Weather Statement	MRX	Loudon	46 min
May 3, 10:48 AM EDT	Special Weather Statement	MRX	Blount	57 min
May 3, 11:38 AM EDT	Special Weather Statement	MRX	Sevier	52 min
May 3, 12:16 PM EDT	Special Weather Statement	MRX	Cocke, Jefferson	44 min
May 3, 12:56 PM EDT	Special Weather Statement	MRX	Greene	64 min
May 3, 4:42 PM EDT	Special Weather Statement	MRX	Union	48 min
May 3, 6:43 PM EDT	Special Weather Statement	MRX	Cocke	47 min
May 3, 6:47 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene	43 min
May 2, 8:24 PM EDT	Special Weather Statement	MRX	Scott, Wise, City of Norton	51 min
May 2, 9:09 PM EDT	Special Weather Statement	MRX	Russell	51 min
May 3, 2:04 PM EDT	Special Weather Statement	MRX	City of Norton	41 min
May 3, 2:49 PM EDT	Special Weather Statement	MRX	Russell	56 min
May 3, 7:39 PM EDT	Special Weather Statement	MRX	Russell	36 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2019 Every severe thunderstorm warning in 2019

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.