Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 151, NWS Nashville, TN

May 18, 2012Marshall County, Maury County, Williamson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 18, 2012, 7:00 PM CDT for Marshall County, Maury County, Williamson County, Tennessee. It was in force for 45 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: May 18, 2012, 7:00 PM CDT (00:00 UTC)
Expired: May 18, 2012, 7:45 PM CDT
In force: 45 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Marshall County, TN, Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 65 km from the middle of the area, began a volume at 00:03 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 00:00Z, 0.0 hours before the alert went out and 52 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: 1205 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1767 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: -28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

258 
WUUS54 KOHX 190000
SVROHX
TNC117-119-187-190045-
/O.NEW.KOHX.SV.W.0151.120519T0000Z-120519T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
700 PM CDT FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL WILLIAMSON COUNTY IN MIDDLE TENNESSEE...
  NORTH CENTRAL MARSHALL COUNTY IN MIDDLE TENNESSEE...
  EAST CENTRAL MAURY COUNTY IN MIDDLE TENNESSEE...

* UNTIL 745 PM CDT

* AT 658 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS NEAR SPRING
  HILL...MOVING NORTHWEST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SPRING HILL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2. DO NOT
STAY OUTDOORS IF YOU ARE IN THE PATH OF SEVERE THUNDERSTORMS.

&&

LAT...LON 3571 8702 3586 8684 3570 8669 3560 8680
TIME...MOT...LOC 0000Z 134DEG 3KT 3569 8683

$$

FORECASTER:BOYD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 2:19 PM CDT	Special Weather Statement	OHX	Van Buren	26 min
May 19, 2:31 PM CDT	Severe Thunderstorm Warning	OHX	Van Buren, White	31 min
May 19, 3:08 PM CDT	Severe Thunderstorm Warning	OHX	White	24 min
May 19, 3:38 PM CDT	Special Weather Statement	OHX	White	37 min
May 19, 3:42 PM CDT	Special Weather Statement	OHX	Cumberland	33 min
May 19, 4:10 PM CDT	Special Weather Statement	OHX	Cannon	50 min
May 19, 4:22 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Coffee, Rutherford, Warren	53 min
May 19, 4:24 PM CDT	Severe Thunderstorm Warning	OHX	Robertson	22 min
May 19, 4:50 PM CDT	Special Weather Statement	OHX	Montgomery	40 min
May 19, 4:55 PM CDT	Special Weather Statement	OHX	Rutherford	50 min
May 19, 5:02 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Rutherford	43 min
May 19, 5:03 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Robertson	27 min
May 19, 5:05 PM CDT	Special Weather Statement	OHX	Maury	25 min
May 19, 5:14 PM CDT	Special Weather Statement	OHX	Cheatham	46 min
May 19, 5:33 PM CDT	Special Weather Statement	OHX	Wilson	57 min
May 19, 5:39 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Rutherford, Williamson	51 min
May 19, 5:45 PM CDT	Special Weather Statement	OHX	Hickman	45 min
May 19, 5:47 PM CDT	Severe Thunderstorm Warning	OHX	Sumner, Trousdale, Wilson	43 min
May 19, 5:58 PM CDT	Areal Flood Advisory	OHX	Bedford, Rutherford	2 hr
May 19, 6:15 PM CDT	Special Weather Statement	OHX	Cheatham	45 min
May 19, 6:21 PM CDT	Special Weather Statement	OHX	Giles	39 min
May 19, 6:23 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	52 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2012 Every severe thunderstorm warning in 2012

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.