Alert archive / Tennessee / Special Weather Statements in 2021

Special Weather Statement, NWS Morristown, TN

August 11, 2021Bradley County, Tennessee

NWS Morristown, TN issued this special weather statement at Aug 11, 2021, 8:20 AM EDT for Bradley County, Tennessee. It was in force for 25 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 11, 2021, 8:20 AM EDT (12:20 UTC)
Expired: Aug 11, 2021, 8:45 AM EDT
In force: 25 min
Issued by: NWS Morristown, TN
Hail: 0.50 in
Wind: 40

County Bradley County, TN

The radar

The Northeast Alabama radar (KHTX), 101 km from the middle of the area, began a volume at 12:20 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, 0.3 hours before the alert went out and 189 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: 1000 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1034 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 17 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 11, 7:06 AM EDT, 1 hour 14 minutes earlier.

Area forecast discussion, Aug 11, 7:06 AM EDT, 1 hour 14 minutes before

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Hazardous weather outlook, Aug 11, 3:02 AM EDT, 5 hours 18 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
302 AM EDT Wed Aug 11 2021

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-120715-
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-
302 AM EDT Wed Aug 11 2021 /202 AM CDT Wed Aug 11 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 in the
forecast again this afternoon. Some of these storms could be
strong to severe with damaging winds, cloud to ground lightning,
small hail, and brief heavy rainfall being the primary threats.

In addition to the thunderstorms, heat indices will elevate into
the upper 90s for much of the northern Tennessee Valley today,
with values into the lower 100s across the central and southern
Tennessee Valley.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Afternoon heat indices will remain in the upper 90s to lower 100s
each afternoon on Thursday and Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not needed at this time.

In the hours before

Special weather statement, Aug 11, 8:20 AM 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
Aug 11, 2:44 PM EDT	Special Weather Statement	MRX	Loudon	46 min
Aug 11, 2:46 PM EDT	Special Weather Statement	MRX	Union	44 min
Aug 11, 2:49 PM EDT	Special Weather Statement	MRX	Marion	41 min
Aug 11, 3:14 PM EDT	Special Weather Statement	MRX	McMinn	31 min
Aug 11, 3:44 PM EDT	Special Weather Statement	MRX	McMinn	31 min
Aug 11, 3:59 PM EDT	Special Weather Statement	MRX	Morgan	31 min
Aug 11, 4:09 PM EDT	Special Weather Statement	MRX	Hamilton	36 min
Aug 11, 4:11 PM EDT	Special Weather Statement	MRX	Roane	34 min
Aug 11, 4:19 PM EDT	Special Weather Statement	MRX	McMinn	26 min
Aug 11, 4:30 PM EDT	Special Weather Statement	MRX	Bradley	30 min
Aug 11, 4:32 PM EDT	Special Weather Statement	MRX	Morgan	28 min
Aug 11, 4:41 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, McMinn, Polk	49 min
Aug 11, 5:03 PM EDT	Special Weather Statement	MRX	McMinn	27 min
Aug 11, 5:23 PM EDT	Special Weather Statement	MRX	Polk	37 min
Aug 11, 5:28 PM EDT	Severe Thunderstorm Warning	MRX	McMinn, Monroe, Polk	47 min
Aug 11, 5:50 PM EDT	Severe Thunderstorm Warning	MRX	Polk	40 min
Aug 11, 6:11 PM EDT	Special Weather Statement	MRX	Jefferson	34 min
Aug 11, 6:17 PM EDT	Areal Flood Advisory	MRX	Polk	118 min
Aug 11, 6:20 PM EDT	Special Weather Statement	MRX	Sevier	25 min
Aug 11, 6:27 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	25 min
Aug 11, 6:48 PM EDT	Special Weather Statement	MRX	Jefferson	42 min
Aug 11, 7:07 PM EDT	Special Weather Statement	MRX	Sullivan	23 min
Aug 11, 4:51 PM EDT	Special Weather Statement	MRX	Wise	24 min
Aug 11, 6:36 PM EDT	Special Weather Statement	MRX	Fannin	24 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.