Alert archive / Tennessee / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 56, NWS Morristown, TN

May 22, 20134 counties in Tennessee; Scott County, Virginia

NWS Morristown, TN issued this severe thunderstorm warning at May 22, 2013, 4:32 PM EDT for 4 counties in Tennessee; Scott County, Virginia. It was in force for 43 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 22, 2013, 4:32 PM EDT (20:32 UTC)
Expired: May 22, 2013, 5:15 PM EDT
In force: 43 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Greene County, TN, Hawkins County, TN, Sullivan County, TN, Washington County, TN, Scott County, VA

The radar

The Knoxville radar (KMRX), 74 km from the middle of the area, began a volume at 20:33 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.5 hours before the alert went out and 249 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: 224 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 644 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 42 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 22, 3:06 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, May 22, 3:06 PM EDT, 1 hour 26 minutes before

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Hazardous weather outlook, May 22, 10:10 AM EDT, 6 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
1010 AM EDT WED MAY 22 2013

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-231000-
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-
1010 AM EDT (910 AM CDT) WED MAY 22 2013

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

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

AN UPPER-LEVEL DISTURBANCE WILL GENERATE SCATTERED SHOWERS AND
THUNDERSTORMS OVER THE SOUTHERN APPALACHIAN REGION TODAY AND
TONIGHT. SOME STORMS MAY BECOME SEVERE THIS AFTERNOON AND EVENING...
BRINGING THE POSSIBILITY OF DAMAGING WINDS...LARGE HAIL...AND
LOCALLY HEAVY RAINFALL. IN ADDITION...AN ISOLATED TORNADO OR TWO
WILL BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

SCATTERED SHOWERS AND THUNDERSTORMS WILL REDEVELOP ACROSS THE REGION
ON THURSDAY AFTERNOON AND EVENING. SOME OF THESE STORMS MAY BECOME
STRONG...PRODUCING STRONG GUSTY WINDS AND SMALL HAIL.

OTHERWISE...NO HAZARDOUS WEATHER IS ANTICIPATED THIS WEEKEND INTO
EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

DMG

In the hours before

Local storm report, May 22, 4:00 PM EDT, 32 minutes before

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Special weather statement, May 22, 4:07 PM EDT, 25 minutes before

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Local storm report, May 22, 4:16 PM EDT, 16 minutes before

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Local storm report, May 22, 4:20 PM EDT, 12 minutes before

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Special weather statement, May 22, 4:25 PM EDT, 7 minutes before

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Local storm report, May 22, 4:27 PM EDT, 5 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 21, 8:01 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Sullivan, Unicoi, Washington	59 min
May 21, 8:11 PM EDT	Areal Flood Advisory	MRX	Carter	3 hr
May 21, 8:38 PM EDT	Flash Flood Warning	MRX	Carter, Unicoi, Washington	4 hr
May 22, 2:39 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	66 min
May 22, 2:44 PM EDT	Severe Thunderstorm Warning	MRX	Meigs, Rhea, Roane	46 min
May 22, 2:59 PM EDT	Severe Thunderstorm Warning	MRX	Greene, Washington	61 min
May 22, 3:30 PM EDT	Areal Flood Advisory	MRX	Carter, Greene, Johnson, Sullivan, Unicoi, Washington	3 hr
May 22, 3:54 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	51 min
May 22, 3:58 PM EDT	Severe Thunderstorm Warning	MRX	Greene	62 min
May 22, 5:01 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, Meigs, Rhea	59 min
May 22, 5:17 PM EDT	Areal Flood Advisory	MRX	Sullivan	3 hr
May 22, 6:39 PM EDT	Severe Thunderstorm Warning	MRX	Johnson	36 min
May 22, 6:55 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Jefferson, Sevier	50 min
May 22, 7:14 PM EDT	Areal Flood Advisory	MRX	Jefferson, Sevier	3 hr
May 21, 9:08 PM EDT	Severe Thunderstorm Warning	MRX	Washington, City of Bristol	37 min
May 21, 9:51 PM EDT	Areal Flood Advisory	MRX	Washington	3 hr
May 22, 12:26 AM EDT	Flash Flood Warning	MRX	Washington	109 min
May 22, 3:13 PM EDT	Severe Thunderstorm Warning	MRX	Washington	62 min
May 22, 5:08 PM EDT	Severe Thunderstorm Warning	MRX	Russell, Scott, Wise	52 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2013 Severe Thunderstorm Warnings in Virginia, 2013 Every 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.