Alert archive / Tennessee / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 37, NWS Morristown, TN

May 31, 20155 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 31, 2015, 1:45 PM EDT for 5 counties in Tennessee. It was in force for 60 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 31, 2015, 1:45 PM EDT (17:45 UTC)
Expired: May 31, 2015, 2:45 PM EDT
In force: 60 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bradley County, TN, Hamilton County, TN, McMinn County, TN, Meigs County, TN, Polk County, TN

The radar

The Northeast Alabama radar (KHTX), 123 km from the middle of the area, began a volume at 17:48 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, 5.8 hours before the alert went out and 188 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: 61 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 656 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 69 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 31, 1:04 PM EDT, 41 minutes earlier.

Area forecast discussion, May 31, 1:04 PM EDT, 41 minutes before

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Hazardous weather outlook, May 31, 4:14 AM EDT, 9 hours 31 minutes before

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In the hours before

Special weather statement, May 31, 12:34 PM EDT, 1 hour 11 minutes before

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Special weather statement, May 31, 12:48 PM EDT, 57 minutes before

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Special weather statement, May 31, 12:56 PM EDT, 49 minutes before

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Special weather statement, May 31, 1:24 PM EDT, 21 minutes before

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Special weather statement, May 31, 1:35 PM EDT, 10 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 31, 12:34 PM EDT	Special Weather Statement	MRX	Hamilton	41 min
May 31, 12:48 PM EDT	Special Weather Statement	MRX	Hamblen, Jefferson, Knox	42 min
May 31, 12:56 PM EDT	Special Weather Statement	MRX	Hancock	34 min
May 31, 12:58 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Hamblen, Jefferson, Knox, Sevier, Union	49 min
May 31, 1:24 PM EDT	Special Weather Statement	MRX	Hamilton	51 min
May 31, 1:49 PM EDT	Special Weather Statement	MRX	Greene	41 min
May 31, 2:10 PM EDT	Special Weather Statement	MRX	Rhea	65 min
May 31, 2:19 PM EDT	Special Weather Statement	MRX	McMinn, Meigs	41 min
May 31, 2:26 PM EDT	Special Weather Statement	MRX	Sevier	34 min
May 31, 2:32 PM EDT	Special Weather Statement	MRX	Greene	43 min
May 31, 2:39 PM EDT	Special Weather Statement	MRX	Roane	36 min
May 31, 2:52 PM EDT	Special Weather Statement	MRX	Polk	38 min
May 31, 2:55 PM EDT	Special Weather Statement	MRX	Monroe	50 min
May 31, 3:01 PM EDT	Severe Thunderstorm Warning	MRX	Monroe, Polk	59 min
May 31, 3:06 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Loudon, McMinn, Monroe	54 min
May 31, 3:07 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Knox, Loudon, Morgan, Roane	38 min
May 31, 3:25 PM EDT	Areal Flood Advisory	MRX	Monroe, Polk	2 hr
May 31, 3:42 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Knox, Loudon, Roane, Union	48 min
May 31, 3:47 PM EDT	Flash Flood Warning	MRX	Monroe, Polk	3 hr
May 31, 3:49 PM EDT	Special Weather Statement	MRX	Bledsoe	26 min
May 31, 3:59 PM EDT	Special Weather Statement	MRX	Blount, Sevier	46 min
May 31, 4:06 PM EDT	Special Weather Statement	MRX	Marion, Sequatchie	39 min
May 31, 4:18 PM EDT	Areal Flood Advisory	MRX	Marion, Sequatchie	3 hr
May 31, 4:18 PM EDT	Special Weather Statement	MRX	Carter	42 min
May 31, 4:55 PM EDT	Special Weather Statement	MRX	Marion	50 min
May 31, 5:21 PM EDT	Special Weather Statement	MRX	Johnson	24 min
May 31, 1:35 PM EDT	Special Weather Statement	MRX	Cherokee	40 min
May 31, 3:26 PM EDT	Special Weather Statement	MRX	Clay	34 min
May 31, 4:44 PM EDT	Severe Thunderstorm Warning	MRX	Cherokee, Clay	31 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2015 Every severe thunderstorm warning in 2015

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.