Alert archive / Tennessee / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 140, NWS Morristown, TN

August 23, 2013Bledsoe County, Rhea County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Aug 23, 2013, 5:26 PM CDT for Bledsoe County, Rhea County, Tennessee. It was in force for 64 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 23, 2013, 5:26 PM CDT (22:26 UTC)
Expired
Aug 23, 2013, 6:30 PM CDT
In force
64 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon

Counties Bledsoe County, TN, Rhea County, TN

The radar

The Northeast Alabama radar (KHTX), 119 km from the middle of the area, began a volume at 22:26 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, 10.4 hours before the alert went out and 150 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2013-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2024 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2013-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2024 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
743 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
23 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 Aug 23, 1:51 PM CDT, 3 hours 35 minutes earlier.

Area forecast discussion, Aug 23, 1:51 PM CDT, 3 hours 35 minutes before
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Hazardous weather outlook, Aug 23, 4:26 AM CDT, 13 hours before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
526 AM EDT FRI AUG 23 2013

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-240930-
CHEROKEE-CLAY-SCOTT TN-CAMPBELL-CLAIBORNE-HANCOCK-HAWKINS-
SULLIVAN-JOHNSON-MORGAN-ANDERSON-UNION-GRAINGER-HAMBLEN-
NORTHWEST COCKE-COCKE SMOKY MOUNTAINS-NORTHWEST GREENE-
SOUTHEAST GREENE-WASHINGTON TN-UNICOI-NORTHWEST CARTER-
SOUTHEAST CARTER-ROANE-LOUDON-KNOX-JEFFERSON-NW 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-SCOTT-RUSSELL-WASHINGTON-
526 AM EDT FRI AUG 23 2013 /426 AM CDT FRI AUG 23 2013/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH
CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA.

.DAY ONE...TODAY AND TONIGHT...

PATCHY AREAS OF FOG WILL BE ENCOUNTERED THIS MORNING...AND COULD BE
LOCALLY DENSE ENOUGH TO REDUCE VISIBILITIES TO BETWEEN ZERO AND 1/2
OF A MILE AT TIMES.

SCATTERED THUNDERSTORMS WILL DEVELOP BY THIS AFTERNOON...BUT ARE
NOT EXPECTED TO BECOME STRONG OR SEVERE AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

TG

In the hours before

Special weather statement, Aug 23, 2:38 PM CDT, 2 hours 48 minutes before
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Local storm report, Aug 23, 4:02 PM CDT, 1 hour 24 minutes before
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Local storm report, Aug 23, 4:36 PM CDT, 50 minutes before
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Special weather statement, Aug 23, 4:49 PM CDT, 37 minutes before
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Local storm report, Aug 23, 4:58 PM CDT, 28 minutes before
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Local storm report, Aug 23, 5:01 PM CDT, 25 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 3:19 PM CDTSevere Thunderstorm WarningMRXLoudon, Roane41 min
Aug 23, 3:31 PM CDTSevere Thunderstorm WarningMRXSevier44 min
Aug 23, 3:44 PM CDTSevere Thunderstorm WarningMRXBlount, Loudon46 min
Aug 23, 4:02 PM CDTSevere Thunderstorm WarningMRXLoudon, Monroe58 min
Aug 23, 5:22 PM CDTSevere Thunderstorm WarningMRXBradley, Hamilton, Meigs53 min
Aug 23, 5:37 PM CDTAreal Flood AdvisoryMRXBledsoe, Rhea113 min
Aug 23, 6:11 PM CDTSevere Thunderstorm WarningMRXHamilton, Marion, Sequatchie64 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2013Every severe thunderstorm warning in 2013

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.