Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 138, NWS Nashville, TN

May 6, 2012Cheatham County, Dickson County, Montgomery County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 6, 2012, 2:32 AM CDT for Cheatham County, Dickson County, Montgomery County, Tennessee. It was in force for 28 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 6, 2012, 2:32 AM CDT (07:32 UTC)
Expired: May 6, 2012, 3:00 AM CDT
In force: 28 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Cheatham County, TN, Dickson County, TN, Montgomery County, TN

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 7.5 hours before the alert went out and 58 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: 1125 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1540 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 107 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.

439 
WUUS54 KOHX 060732
SVROHX
TNC021-043-125-060800-
/O.NEW.KOHX.SV.W.0138.120506T0732Z-120506T0800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
232 AM CDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN DICKSON COUNTY IN MIDDLE TENNESSEE...
  CHEATHAM COUNTY IN MIDDLE TENNESSEE...
  SOUTH CENTRAL MONTGOMERY COUNTY IN MIDDLE TENNESSEE...

* UNTIL 300 AM CDT

* AT 227 AM 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
  CHARLOTTE...LITTLE MOVEMENT. HEAVY RAINFALL CAN ALSO BE EXPECTED
  WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  RURAL NORTHEASTERN DICKSON COUNTY...

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 3639 8709 3622 8716 3624 8736 3641 8731
TIME...MOT...LOC 0731Z 290DEG 3KT 3631 8725

$$

FORECASTER:BOYD

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 Nashville, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 11:40 PM CDT, 2 hours 52 minutes earlier.

Area forecast discussion, May 5, 11:40 PM CDT, 2 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1140 PM CDT SAT MAY 5 2012

.UPDATE...FOR 06Z AVIATION FORECASTS.

&&

.AVIATION...AT THE MOMENT, DO NOT EXPECT ONGOING CONVECTION JUST
WEST OF TENNESSEE RIVER, OVER SOUTHWESTERN KENTUCKY AND WESTERN
TENNESSEE, TO IMPACT CKV TERMINAL. HOWEVER, WILL KEEP AN EYE ON
THUNDERSTORM PROGRESS FOR THE REST OF THE NIGHT IN THE EVENT THAT
AN AMENDMENT MIGHT BECOME NECESSARY.

WITH MOST AREAS RECEIVING SOME RAIN EARLIER TODAY AND LIGHT WINDS
EXPECTED HAVE CONTINUED PREVIOUS TREND OF MVFR BR LATE TONIGHT AT
ALL SITES. CONVECTIVE CHANCES LOOK MINIMAL ON SUNDAY...ESPLY ON
THE PLATEAU WHERE MODELS ARE ADVERTISING DRY LLVL AIR WILL ADVECT
IN FROM THE EAST. CARRIED VCTS AFTER 19Z AT CSV AND BNA ONLY. ANY
ISOLATED CONVECTION THAT DEVELOPS SHOULD DIMINISH BY 02Z/07.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

19

Hazardous weather outlook, May 5, 9:22 PM CDT, 5 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
922 PM CDT SAT MAY 5 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-070230-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-
SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS-
WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DE KALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
922 PM CDT SAT MAY 5 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TONIGHT

AREAS OF FOG...LOCALLY DENSE...WILL BE POSSIBLE AFTER
MIDNIGHT TONIGHT ACROSS THE CUMBERLAND PLATEAU REGION.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR ALL OF
MIDDLE TENNESSEE LATER MONDAY AND MONDAY NIGHT AS A COLD
FRONT MOVES INTO THE REGION. SEVERE STORMS MAY PRODUCE
DAMAGING WINDS AND LARGE HAIL.

06

In the hours before

Special weather statement, May 6, 12:48 AM CDT, 1 hour 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1248 AM CDT SUN MAY 6 2012

TNZ005-006-022>025-056>058-060645-
BENTON-DICKSON-HICKMAN-HOUSTON-HUMPHREYS-LEWIS-MONTGOMERY-PERRY-
STEWART-
1248 AM CDT SUN MAY 6 2012

...SIGNIFICANT WEATHER ADVISORY FOR BENTON...DICKSON...HICKMAN...
HOUSTON...HUMPHREYS...LEWIS...MONTGOMERY...PERRY AND STEWART
COUNTIES...

AT 1239 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG THE TENNESSEE RIVER FROM HOLLADAY...TO
CAMDEN...TO NEW JOHNSVILLE INTO THE PARIS LANDING AREA. MOVEMENT IS
SOUTHEAST AT 30 MPH.

LATEST INFRARED SATELLITE LOOP SHOWING CLOUD TOPS GETTING COLDER IN
THIS AREA.

HALF INCH SIZE HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3667 8786 3664 8784 3665 8736 3560 8757
      3570 8804 3572 8804 3581 8798 3581 8802
      3585 8805 3585 8822 3612 8822 3626 8809
      3636 8810 3637 8801 3644 8807 3653 8804
      3668 8807

BOYD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 12:48 AM CDT	Special Weather Statement	OHX	Benton, Houston, Humphreys, Perry, Stewart	57 min
May 6, 1:53 AM CDT	Severe Thunderstorm Warning	OHX	Houston, Humphreys	48 min
May 6, 1:56 AM CDT	Severe Thunderstorm Warning	OHX	Houston, Stewart	27 min
May 6, 3:06 AM CDT	Special Weather Statement	OHX	Bedford, Benton, Cheatham, Davidson, Dickson, Hickman and 15 more	54 min
May 6, 4:50 AM CDT	Special Weather Statement	OHX	Bedford, Cannon, Coffee, Giles, Hickman, Lawrence and 6 more	55 min
May 6, 5:39 AM CDT	Special Weather Statement	OHX	Stewart	66 min
May 6, 3:51 PM CDT	Special Weather Statement	OHX	Montgomery	24 min
May 6, 4:10 PM CDT	Severe Thunderstorm Warning	OHX	Montgomery	35 min
May 6, 4:16 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	29 min
May 6, 4:22 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Rutherford	23 min
May 6, 4:34 PM CDT	Special Weather Statement	OHX	Williamson	26 min
May 6, 4:40 PM CDT	Special Weather Statement	OHX	Robertson	35 min
May 6, 4:51 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Montgomery, Stewart	24 min
May 6, 4:54 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner	36 min
May 6, 4:57 PM CDT	Severe Thunderstorm Warning	OHX	Robertson	33 min
May 6, 5:03 PM CDT	Special Weather Statement	OHX	Rutherford	57 min
May 6, 5:22 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner, Wilson	23 min
May 6, 5:28 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner	32 min
May 6, 5:45 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy	30 min
May 6, 5:58 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Williamson	32 min
May 6, 6:48 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	27 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.