Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 110, NWS Nashville, TN

July 14, 2014Davidson County, Rutherford County, Williamson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 14, 2014, 5:07 PM CDT for Davidson County, Rutherford County, Williamson County, Tennessee. It was in force for 38 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 14, 2014, 5:07 PM CDT (22:07 UTC)
Expired: Jul 14, 2014, 5:45 PM CDT
In force: 38 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Davidson County, TN, Rutherford County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 42 km from the middle of the area, began a volume at 22:07 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.

What was reported inside it

Time	Report	Where	Remark
Jul 14, 5:20 PM CDT	TSTM WND DMG	5 Ssw Smyrna, TN	LARGE TREE LIMBS WERE BLOWN DOWN IN THE JORDAN ACRES AREA OF SMYRNA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 13 minutes after it went out.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 14, 1:22 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.1 hours before the alert went out and 29 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: 1315 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

632 
WUUS54 KOHX 142207
SVROHX
TNC037-149-187-142245-
/O.NEW.KOHX.SV.W.0110.140714T2207Z-140714T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
507 PM CDT MON JUL 14 2014

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN RUTHERFORD COUNTY IN MIDDLE TENNESSEE...
  EASTERN WILLIAMSON COUNTY IN MIDDLE TENNESSEE...
  SOUTHEASTERN DAVIDSON COUNTY IN MIDDLE TENNESSEE...

* UNTIL 545 PM CDT

* AT 504 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH. THESE SEVERE STORMS EXTENDED FROM BRENTWOOD TO
  SPRING HILL...AND WERE MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BRENTWOOD...NOLENSVILLE...LA VERGNE...SMYRNA...TRIUNE...EAGLEVILLE
  AND ROCKVALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MONDAY
EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3605 8643 3570 8649 3573 8685 3576 8694
      3578 8693 3578 8695 3604 8688 3606 8646
TIME...MOT...LOC 2207Z 271DEG 26KT 3600 8679 3578 8685

$$

FORECASTER:13

1 follow-up statement

354 
WWUS54 KOHX 142226
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
526 PM CDT MON JUL 14 2014

TNC037-149-187-142245-
/O.CON.KOHX.SV.W.0110.000000T0000Z-140714T2245Z/
RUTHERFORD TN-WILLIAMSON TN-DAVIDSON TN-
526 PM CDT MON JUL 14 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN DAVIDSON...EASTERN WILLIAMSON AND WESTERN RUTHERFORD
COUNTIES...

AT 525 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM LA VERGNE TO EAGLEVILLE...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  LA VERGNE...SMYRNA...EAGLEVILLE AND ROCKVALE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT MONDAY
EVENING FOR CENTRAL TENNESSEE.

&&

LAT...LON 3573 8676 3604 8669 3606 8646 3605 8643
      3570 8649
TIME...MOT...LOC 2227Z 271DEG 26KT 3599 8661 3577 8667

$$

13

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 Jul 14, 5:00 PM CDT, 7 minutes earlier.

Area forecast discussion, Jul 14, 5:00 PM CDT, 7 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
500 PM CDT MON JUL 14 2014

.UPDATE...
UPDATED THE SUITE OF FORECAST PRODUCTS TO MATCH SEVERE
THUNDERSTORM WATCH NUMBER 419.
&&

.PREV DISCUSSION.../ISSUED 314 PM CDT MON JUL 14 2014/

DISCUSSION...

STORMS ORGANIZING AS WE SPEAK JUST W OF THE TN RIVER/N OF I-40.
STORMS ARE DEVELOPING IN AXIS OF 3000+ J/KG CAPE AND VERY HIGH (2+
INCH) PWAT AIR. WIND SHEAR IS RELATIVELY WEAK...20-25 KT 0-6KM BULK
SHEAR...BUT SUFFICIENT FOR STORM ORGANIZATION GIVEN THE
INSTABILITY AND ALREADY DEVELOPING COLD POOL BEHIND ONGOING STORMS.
SVR THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8 PM WITH DAMAGING
WINDS THE MAIN THREAT. LOCALIZED FLASH FLOOD POTENTIAL CONTINUES
AS WELL GIVEN SLOW MOVEMENT OF STORMS AND VERY HIGH ATMOSPHERIC
MSTR CONTENT.

SVR POTENTIAL SHOULD BACK OFF AFTER MIDNIGHT BUT STORM CHANCES
WILL CONTINUE AS THE ACTUAL FRONT MOVES THRU. FRONT SHOULD CLEAR
NASHVILLE BEFORE 12Z AND OUR FAR SE COUNTIES BY 18Z AT THE LATEST.
WL CARRY LOW POPS UNTIL THE FRONT PASSES...THEN A COUPLE DRY AND
PLEASANT DAYS ARE IN STORE AS AN UNSEASONABLY COOL AIRMASS BUILDS
IN. HIGHS WILL STRUGGLE TO REACH 80S AT MOST LOCATIONS TUE AND WED
WITH LOW HUMIDITY.

ISENTROPIC LIFT BEGINS LATE THU AND INTENSIFIES INTO FRIDAY AS
MSTR SURGES BACK INTO THE COOL AIRMASS IN PLACE. ALL MODELS
SUGGEST WIDESPREAD PCPN WILL OCCUR AND HV RAISED POPS INTO THE
LIKELY CATEGORY TO ACCOUNT. DEEPEST MSTR EXITS ON SATURDAY BUT
ENOUGH MSTR WILL HANG AROUND TO KEEP LOW POPS GOING THROUGH THE
WEEKEND. IN FACT THE GENERAL PATTERN....NW FLOW ALOFT AND/OR BROAD
WEAKNESS IN THE MID LVL RIDGE...WILL SUPPORT STORM CHANCES THRU
THE EXTENDED AND BEYOND
&&

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

&&

31

Hazardous weather outlook, Jul 14, 2:15 PM CDT, 2 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
215 PM CDT MON JUL 14 2014

TNZ005>011-023>034-056>066-075-077>080-093>095-151915-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-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-
215 PM CDT MON JUL 14 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS AND LOCALLY HEAVY
RAINFALL ACROSS ALL OF MIDDLE TENNESSEE THIS AFTERNOON AND
TONIGHT.

NUMEROUS SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS THE MID STATE
THIS AFTERNOON AND EVENING. SOME STORMS MAY BE STRONG TO SEVERE...
WITH DAMAGING WINDS POSSIBLE. HEAVY RAINFALL IS ALSO POSSIBLE.
LOCALIZED AMOUNTS OF 2-4 INCHES MAY OCCUR WHERE SLOW MOVING
THUNDERSTORMS REPEATEDLY MOVE OVER THE SAME AREAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER CALL TO ACTION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS MAY BE NEEDED.

SPOTTER THUNDERSTORM REPORTING CRITERIA...
TORNADO
FUNNEL CLOUD
FLOODING
HAIL >= 1/2 INCH
WINDS > 50 MPH (MEASURED)
STRUCTURAL DAMAGE
TREES OR POWER LINES DOWN

07

In the hours before

Special weather statement, Jul 14, 3:38 PM CDT, 1 hour 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
338 PM CDT MON JUL 14 2014

TNZ056-142130-
PERRY-
338 PM CDT MON JUL 14 2014

...SIGNIFICANT WEATHER ADVISORY FOR PERRY COUNTY...

AT 335 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A STRONG THUNDERSTORM NEAR PARSONS...MOVING EAST AT 30 MPH.

SOME LOCATIONS IN THE PATH INCLUDE MOUSETAIL LANDING STATE PARK AND
LOBELVILLE.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3576 8799 3584 8797 3584 8791 3580 8786
      3584 8782 3583 8772 3573 8773 3571 8771
      3570 8774 3566 8774 3563 8768 3560 8766
      3560 8803 3568 8802 3572 8804

27

Special weather statement, Jul 14, 3:58 PM CDT, 1 hour 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
358 PM CDT MON JUL 14 2014

TNZ024-142130-
HUMPHREYS-
358 PM CDT MON JUL 14 2014

...SIGNIFICANT WEATHER ADVISORY FOR HUMPHREYS COUNTY...

AT 356 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A STRONG THUNDERSTORM 10 MILES SOUTH OF NEW JOHNSONVILLE...MOVING
EAST AT 40 MPH.

SOME LOCATIONS IN THE PATH INCLUDE HURRICANE MILLS.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3596 8802 3603 8755 3599 8753 3597 8753
      3595 8756 3595 8760 3593 8764 3591 8770
      3584 8772 3584 8782 3580 8786 3584 8791
      3584 8796 3593 8793 3595 8802

27

Special weather statement, Jul 14, 4:16 PM CDT, 51 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
416 PM CDT MON JUL 14 2014

TNZ026-027-057-059-060-142200-
CHEATHAM-DAVIDSON-HICKMAN-MAURY-WILLIAMSON-
416 PM CDT MON JUL 14 2014

...SIGNIFICANT WEATHER ADVISORY FOR CHEATHAM...DAVIDSON...HICKMAN...
MAURY AND WILLIAMSON COUNTIES...

AT 416 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES NORTH OF
WHITE BLUFF TO KINGSTON SPRINGS TO 11 MILES EAST OF CENTERVILLE...
MOVING EAST AT 50 MPH.

SOME LOCATIONS IN THE PATH INCLUDE PRIMM SPRINGS...KINGSTON
SPRINGS...FAIRVIEW...PEGRAM...NATCHEZ TRACE AT HIGHWAY 96...
BELLEVUE...ASHLAND CITY...LEIPERS FORK...BELLS BEND...FOREST HILLS...
BELLE MEADE AND OAK HILL.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.

LAT...LON 3633 8670 3624 8659 3610 8652 3606 8652
      3606 8653 3609 8655 3599 8662 3579 8661
      3579 8666 3574 8670 3575 8740 3597 8729
      3598 8719 3618 8715 3621 8719 3624 8717
      3624 8719 3631 8715 3634 8728

27

Special weather statement, Jul 14, 4:26 PM CDT, 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
426 PM CDT MON JUL 14 2014

TNZ056>058-093-142230-
HICKMAN-LEWIS-PERRY-WAYNE-
426 PM CDT MON JUL 14 2014

...SIGNIFICANT WEATHER ADVISORY FOR HICKMAN...LEWIS...PERRY AND WAYNE
COUNTIES...

AT 425 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM PARSONS TO SARDIS TO
17 MILES SOUTHWEST OF SARDIS...MOVING EAST AT 30 MPH.

SOME LOCATIONS IN THE PATH INCLUDE MOUSETAIL LANDING STATE PARK...
LOBELVILLE...LINDEN...PLEASANTVILLE...CLIFTON...FLATWOODS...
KIMMINS...HOHENWALD...GORDONSBURG AND WAYNESBORO.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.

LAT...LON 3510 8798 3539 8803 3541 8798 3545 8805
      3550 8798 3561 8804 3572 8804 3583 8797
      3581 8785 3583 8782 3583 8722 3571 8725
      3567 8732 3560 8736 3546 8745 3542 8745
      3539 8757 3506 8760

27

Special weather statement, Jul 14, 4:53 PM CDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
453 PM CDT MON JUL 14 2014

TNZ027-028-059-062-142245-
DAVIDSON-RUTHERFORD-WILLIAMSON-WILSON-
453 PM CDT MON JUL 14 2014

...SIGNIFICANT WEATHER ADVISORY FOR DAVIDSON...RUTHERFORD...
WILLIAMSON AND WILSON COUNTIES...

AT 451 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM NASHVILLE TO
BRENTWOOD TO SPRING HILL...MOVING EAST AT 50 MPH.

SOME LOCATIONS IN THE PATH INCLUDE THOMPSONS STATION...BELLS BEND...
BELLEVUE...BEAMAN PARK...FOREST HILLS...BELLE MEADE...FRANKLIN...
BRENTWOOD...OAK HILL...WHITES CREEK...BERRY HILL AND NASHVILLE.

WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.

LAT...LON 3631 8636 3631 8630 3635 8629 3630 8626
      3635 8623 3632 8617 3606 8607 3574 8628
      3570 8677 3578 8700 3596 8689 3621 8699
      3630 8694 3633 8670 3624 8660 3632 8655
      3628 8652 3634 8644 3631 8640 3636 8637

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 6:55 AM CDT	Special Weather Statement	OHX	Stewart	50 min
Jul 14, 7:41 AM CDT	Special Weather Statement	OHX	Montgomery	34 min
Jul 14, 8:15 AM CDT	Special Weather Statement	OHX	Robertson	45 min
Jul 14, 3:04 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Humphreys, Stewart	56 min
Jul 14, 3:38 PM CDT	Special Weather Statement	OHX	Perry	52 min
Jul 14, 3:43 PM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman, Humphreys	47 min
Jul 14, 3:58 PM CDT	Special Weather Statement	OHX	Humphreys	32 min
Jul 14, 4:16 PM CDT	Special Weather Statement	OHX	Cheatham, Davidson, Williamson	44 min
Jul 14, 4:26 PM CDT	Special Weather Statement	OHX	Hickman, Lewis, Perry, Wayne	64 min
Jul 14, 4:34 PM CDT	Severe Thunderstorm Warning	OHX	Lewis, Perry, Wayne	41 min
Jul 14, 4:53 PM CDT	Special Weather Statement	OHX	Davidson, Rutherford, Williamson, Wilson	52 min
Jul 14, 5:13 PM CDT	Special Weather Statement	OHX	Macon, Trousdale	32 min
Jul 14, 5:14 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis, Maury	46 min
Jul 14, 5:18 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Wilson	31 min
Jul 14, 5:26 PM CDT	Special Weather Statement	OHX	Giles, Lawrence	49 min
Jul 14, 5:33 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Marshall, Maury, Rutherford, Williamson	31 min
Jul 14, 5:36 PM CDT	Special Weather Statement	OHX	Putnam	39 min
Jul 14, 5:47 PM CDT	Special Weather Statement	OHX	Cannon, Rutherford	28 min
Jul 14, 6:00 PM CDT	Special Weather Statement	OHX	Bedford, Giles, Marshall	45 min
Jul 14, 6:12 PM CDT	Special Weather Statement	OHX	Putnam, White	48 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2014 Every severe thunderstorm warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.