Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 252, NWS Nashville, TN

July 5, 2009Hickman County, Maury County, Williamson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 5, 2009, 3:10 PM CDT for Hickman County, Maury County, Williamson County, Tennessee. It was in force for 35 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: Jul 5, 2009, 3:10 PM CDT (20:10 UTC)
Expired: Jul 5, 2009, 3:45 PM CDT
In force: 35 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Hickman County, TN, Maury County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 60 km from the middle of the area, began a volume at 20:13 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, 8.2 hours before the alert went out and 49 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: 448 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOHX 052010
SVROHX
TNC081-119-187-052045-
/O.NEW.KOHX.SV.W.0252.090705T2010Z-090705T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
310 PM CDT SUN JUL 5 2009

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HICKMAN COUNTY IN MIDDLE TENNESSEE...
  NORTHEASTERN MAURY COUNTY IN MIDDLE TENNESSEE...
  WILLIAMSON COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF FRANKLIN...

* UNTIL 345 PM CDT

* AT 310 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 17 MILES NORTHWEST OF SPRING
  HILL...OR 16 MILES EAST OF CENTERVILLE...AND MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  8 MILES NORTHWEST OF SPRING HILL BY 345 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 3570 8683 3583 8727 3597 8725 3597 8721
      3598 8721 3599 8672
TIME...MOT...LOC 2011Z 281DEG 15KT 3588 8717

$$

21

1 follow-up statement

000 
WWUS54 KOHX 052028
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
328 PM CDT SUN JUL 5 2009

TNC081-119-187-052045-
/O.CON.KOHX.SV.W.0252.000000T0000Z-090705T2045Z/
MAURY TN-HICKMAN TN-WILLIAMSON TN-
328 PM CDT SUN JUL 5 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR WILLIAMSON...NORTHEASTERN HICKMAN AND NORTHEASTERN MAURY
COUNTIES...

AT 327 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES SOUTH OF
FAIRVIEW...OR 15 MILES WEST OF FRANKLIN...MOVING EAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SPRING
HILL

LAT...LON 3570 8683 3583 8727 3597 8725 3597 8721
      3598 8721 3599 8672
TIME...MOT...LOC 2028Z 281DEG 15KT 3584 8709

$$

21

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:21 PM CDT	Tornado Warning	OHX	Cheatham, Montgomery, Robertson	39 min
Jul 4, 7:53 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson, Sumner	37 min
Jul 4, 9:31 PM CDT	Areal Flood Advisory	OHX	Davidson	3 hr
Jul 4, 11:03 PM CDT	Areal Flood Advisory	OHX	Benton, Humphreys	3 hr
Jul 5, 1:05 AM CDT	Flash Flood Warning	OHX	Hickman, Lewis, Perry	115 min
Jul 5, 1:15 AM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Lewis, Perry, Wayne	30 min
Jul 5, 3:19 AM CDT	Areal Flood Advisory	OHX	Giles, Lawrence, Wayne	3 hr
Jul 5, 4:07 AM CDT	Flash Flood Warning	OHX	Hickman, Lewis, Perry, Wayne	83 min
Jul 5, 4:20 AM CDT	Flash Flood Warning	OHX	Lawrence	85 min
Jul 5, 4:53 AM CDT	Areal Flood Advisory	OHX	Giles, Lawrence, Lewis, Marshall, Maury	3 hr
Jul 5, 3:39 PM CDT	Areal Flood Advisory	OHX	Lewis, Perry, Wayne	3 hr
Jul 5, 4:14 PM CDT	Flash Flood Warning	OHX	Wayne	91 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2009 Every severe thunderstorm warning in 2009

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.