Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

August 25, 2021Morgan County, Tennessee

NWS Morristown, TN issued this special weather statement at Aug 25, 2021, 2:52 PM EDT for Morgan County, Tennessee. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 25, 2021, 2:52 PM EDT (18:52 UTC)
Expired: Aug 25, 2021, 3:30 PM EDT
In force: 38 min
Issued by: NWS Morristown, TN
Hail: 0.25 in
Wind: 40

County Morgan County, TN

The radar

The Knoxville radar (KMRX), 97 km from the middle of the area, began a volume at 18:52 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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.9 hours before the alert went out and 190 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: 729 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1368 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: -27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 25, 1:21 PM EDT, 1 hour 31 minutes earlier.

Area forecast discussion, Aug 25, 1:21 PM EDT, 1 hour 31 minutes before

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</head>
<body>
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Hazardous weather outlook, Aug 25, 11:00 AM EDT, 3 hours 52 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
1100 AM EDT Wed Aug 25 2021

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-261500-
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-
1100 AM EDT Wed Aug 25 2021 /1000 AM CDT Wed Aug 25 2021/

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

.DAY ONE...Today and Tonight

Isolated to scattered showers and thunderstorms are forecast
today, a few of which could be strong to severe with damaging
winds and large hail being the primary threats.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not needed at this time.

In the hours before

Special weather statement, Aug 25, 2:18 PM EDT, 34 minutes before

Special Weather Statement
National Weather Service Morristown TN
218 PM EDT Wed Aug 25 2021

TNZ047-251900-
Southeast Carter TN-
218 PM EDT Wed Aug 25 2021

...A strong thunderstorm will impact portions of southeastern Carter
County through 300 PM EDT...

At 216 PM EDT, Doppler radar was tracking a strong thunderstorm near
Elk Park, or 10 miles northwest of Newland. This storm was nearly
stationary.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Hampton Creek Cove State Park, Roane Mountain State Park and Roan
Mountain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent 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 3612 8203 3612 8205 3611 8206 3610 8208
      3611 8210 3611 8213 3615 8215 3614 8218
      3616 8221 3616 8222 3624 8217 3620 8198
TIME...MOT...LOC 1816Z 014DEG 3KT 3615 8209

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

TD

Special weather statement, Aug 25, 2:52 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Morristown TN
252 PM EDT Wed Aug 25 2021

TNZ035-036-067-251930-
Anderson TN-Roane TN-Morgan TN-
252 PM EDT Wed Aug 25 2021

...A strong thunderstorm will impact portions of southeastern Morgan,
southwestern Anderson and northeastern Roane Counties through 330 PM
EDT...

At 251 PM EDT, Doppler radar was tracking a strong thunderstorm near
Oliver Springs, or 9 miles east of Wartburg, moving west at 10 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Oak Ridge, Wartburg, Oliver Springs, Harriman, Oakdale, Coalfield,
Frozen Head State Park, Petros, Dearmond and Rosedale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent 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 3614 8471 3618 8445 3616 8444 3617 8441
      3618 8440 3619 8436 3601 8429 3589 8460
TIME...MOT...LOC 1851Z 072DEG 9KT 3608 8442

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

TD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 2:18 PM EDT	Special Weather Statement	MRX	Carter	42 min
Aug 25, 3:20 PM EDT	Special Weather Statement	MRX	Sevier	40 min
Aug 25, 3:46 PM EDT	Special Weather Statement	MRX	Sevier	44 min
Aug 25, 4:02 PM EDT	Areal Flood Advisory	MRX	Morgan	3 hr
Aug 25, 4:02 PM EDT	Special Weather Statement	MRX	Knox	43 min
Aug 25, 4:07 PM EDT	Special Weather Statement	MRX	Johnson	38 min
Aug 25, 4:13 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox	47 min
Aug 25, 4:20 PM EDT	Areal Flood Advisory	MRX	Johnson	3 hr
Aug 25, 4:21 PM EDT	Special Weather Statement	MRX	Knox	24 min
Aug 25, 4:32 PM EDT	Areal Flood Advisory	MRX	Knox, Loudon	22 min
Aug 25, 4:49 PM EDT	Flash Flood Warning	MRX	Knox, Loudon	3 hr
Aug 25, 5:01 PM EDT	Special Weather Statement	MRX	Grainger	44 min
Aug 25, 5:08 PM EDT	Special Weather Statement	MRX	Knox	52 min
Aug 25, 5:22 PM EDT	Areal Flood Advisory	MRX	Bledsoe	3 hr
Aug 25, 5:26 PM EDT	Areal Flood Advisory	MRX	Blount	3 hr
Aug 25, 5:31 PM EDT	Areal Flood Advisory	MRX	Sullivan	3 hr
Aug 25, 5:38 PM EDT	Areal Flood Advisory	MRX	Grainger, Jefferson, Knox, Sevier, Union	3 hr
Aug 25, 5:49 PM EDT	Special Weather Statement	MRX	Grainger	41 min
Aug 25, 5:53 PM EDT	Special Weather Statement	MRX	Sullivan	52 min
Aug 25, 6:23 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Hamblen	37 min
Aug 25, 6:27 PM EDT	Special Weather Statement	MRX	Greene	33 min
Aug 25, 6:30 PM EDT	Special Weather Statement	MRX	Sullivan	45 min
Aug 25, 6:33 PM EDT	Special Weather Statement	MRX	McMinn	27 min
Aug 25, 6:38 PM EDT	Special Weather Statement	MRX	Union	37 min
Aug 25, 6:41 PM EDT	Severe Thunderstorm Warning	MRX	Greene	34 min
Aug 25, 6:54 PM EDT	Areal Flood Advisory	MRX	Greene, Hamblen, Hawkins	3 hr
Aug 25, 6:54 PM EDT	Special Weather Statement	MRX	Washington	51 min
Aug 25, 7:01 PM EDT	Areal Flood Advisory	MRX	McMinn	3 hr
Aug 25, 7:03 PM EDT	Areal Flood Advisory	MRX	Claiborne, Grainger, Union	3 hr
Aug 25, 7:05 PM EDT	Areal Flood Advisory	MRX	Sullivan	3 hr
Aug 25, 7:29 PM EDT	Special Weather Statement	MRX	Hawkins	46 min
Aug 25, 7:50 PM EDT	Areal Flood Advisory	MRX	Knox, Loudon	70 min
Aug 25, 6:57 PM EDT	Special Weather Statement	MRX	Wise, City of Norton	48 min

Nearby

Special Weather Statements in Tennessee, 2021 Every special weather statement in 2021

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.