Alert archive / Tennessee / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 133, NWS Nashville, TN

November 14, 2007White County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Nov 14, 2007, 4:36 PM CST for White County, Tennessee. It was in force for 24 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: Nov 14, 2007, 4:36 PM CST (22:36 UTC)
Expired: Nov 14, 2007, 5:00 PM CST
In force: 24 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County White County, TN

The radar

The Nashville radar (KOHX), 99 km from the middle of the area, began a volume at 22:38 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
Nov 14, 4:40 PM CST	TSTM WND DMG	11 Ssw Cookeville, TN	NUMEROUS TREES AND POWER LINES DOWN...AND STRUCTURAL DAMAGE TO A MOBILE HOME.

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 4 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 nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.6 hours before the alert went out and 98 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: 143 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 188 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.

000 
WUUS54 KOHX 142236
SVROHX
TNC185-142300-
/O.NEW.KOHX.SV.W.0133.071114T2236Z-071114T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
436 PM CST WED NOV 14 2007

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WHITE COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF SPARTA...

* UNTIL 500 PM CST

* AT 434 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED 10 MILES WEST OF SPARTA...AND MOVING EAST AT 40
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SPARTA BY 450 PM CST...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR LARGE HAIL...POSSIBLY DAMAGING WINDS...AND DEADLY 
CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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

LAT...LON 3582 8523 3582 8566 3584 8565 3586 8567
      3588 8563 3589 8565 3599 8565 3601 8563
      3604 8559 3606 8535
TIME...MOT...LOC 2236Z 263DEG 36KT 3593 8562

$$
STEIGERWALDT

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 Nov 14, 3:00 PM CST, 1 hour 36 minutes earlier.

Area forecast discussion, Nov 14, 3:00 PM CST, 1 hour 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
300 PM CST WED NOV 14 2007

.SHORT TERM...
LATEST ANALYSIS SHOWING COLD FRONT NEAR EVV-DFW LINE. GOOD INSTABILITY
AND MOISTURE SOURCE CONTINUE TO WORK UP INTO THE MID-STATE AHEAD OF
APPROACHING LL BOUNDARY. UPPER SUPPORT/UVV NOT ALL THAT IMPRESSIVE BUT
PRESENCE ML JET STREAK JUST TO THE NORTH...NOW NEGATIVE STABILITY INDICES
...AND INCREASING LL FORCING REALLY HELPING TO FIRE UP STORMS...SOME OF
WHICH ARE CURRENTLY PRODUCING PEA-NICKLE SIZED HAIL.

THIS COLD FRONT WILL CONTINUE WORKING SOUTH/EAST...AND IS EXPECTED TO
PUSH INTO THE CWA THIS AFTERNOON AND PUSH OUT 01-03Z. DURING THE PROCESS
EXPECT INSTABILITY TO BECOME LITTLE MORE FAVORABLE AS WELL
AS UVV...ESPECIALLY AS FRONT GETS CLOSER AND ML STREAK DROPS LITTLE
FURTHER SOUTH. EXPECT PULSING STORMS TO PRODUCE PEA TO SEVERE SIZED HAIL
WELL AHEAD OF LL BOUNDARY AND POSSIBLE SQUALL LINE AS FRONT PASSES.

BEHIND COLD FRONT LATER THIS EVENING...WEAK TO MODERATE MOISTURE EXPECTED
TO HANG BACK INTO LATE EVENING UNTIL TRAILING WEAK UPPER TROUGH AXIS
PASSES. WILL LEAVE ISOLATED-SCATTERED SHOWERS INTO THE OVERNIGHT HOURS
EAST.

CAA KICKS IN PRETTY QUICK BEHIND FRONTAL BOUNDARY TONIGHT AND EXPECT
A COOL BLUSTERY TYPE DAY ON THURSDAY AS UPPER TROUGH MOVES THROUGH
AND TEMP STRUGGLE TO REACH THE LOW TO MID 50S. WINDS LOOK LIKELY TO
GUST BETWEEN 25-30MPH IN THE LATE MORNING/EARLY AFTERNOON.

SFC HIGH MOVES OVER THE AREA THURSDAY NIGHT...DECOUPLING WINDS OVERNIGHT.
EXPECT ANOTHER PRETTY GOOD FREEZE AREA-WIDE FRIDAY MORNING...FOLLOWED
BY A DRY COOL DAY.

.LONG TERM...
THE REGION REMAINS IN A NORTHWEST FLOW ALOFT REGIME INTO EARLY NEXT WEEK
UNTIL A WEAK RIDGE AXIS SQUEAKS BY AHEAD OF NEXT STORM SYSTEM SET TO
ENTER THE AREA LATER WEDNESDAY. THROUGH THAT TIME...NOT MUCH EXPECTED
OTHER THAN SOME PASSING CLOUDS AS STORM TRACKS LOOK TO BE DIVERTED
AWAY. WILL PUT POPS IN FOR WEDNESDAY ONLY.

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      41  52  31  54 /  80  10   0   0
CLARKSVILLE    39  50  29  54 /  70  10   0   0
CROSSVILLE     40  44  27  49 /  90  10   0   0
COLUMBIA       42  52  30  55 /  80  10   0   0
LAWRENCEBURG   43  52  29  55 /  80  10   0   0
WAVERLY        40  51  29  54 /  70  10   0   0

&&

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

&&

07

Hazardous weather outlook, Nov 14, 3:57 AM CST, 12 hours 39 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
357 AM CST WED NOV 14 2007

TNZ005>011-022>034-056>066-075-077>080-093>095-151130-
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-DEKALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
357 AM CST WED NOV 14 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL DEVELOP AHEAD OF A STRONG COLD
FRONT THIS AFTERNOON AND EVENING. BRIEF HEAVY DOWNPOURS CAN BE
EXPECTED ALONG WITH SOME GUSTY WINDS. ISOLATED SEVERE STORMS WITH
DAMAGING WINDS MAY OCCUR. THE FRONT WILL MOVE THROUGH THE ENTIRE
MID STATE BY MIDNIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

DUE TO THE BRIEF AND ISOLATED NATURE OF POSSIBLE SEVERE WEATHER
THREAT...SPOTTER ACTIVATION IS NOT ANTICIPATED.

13

In the hours before

Local storm report, Nov 14, 1:35 PM CST, 3 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
135 PM CST WED NOV 14 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0130 PM     HAIL             NASHVILLE               36.17N 86.78W
11/14/2007  E0.88 INCH       DAVIDSON           TN   TRAINED SPOTTER

            REPORTED IN DOWNTOWN NASHVILLE

0119 PM     HAIL             10 SW NASHVILLE         36.07N 86.91W
11/14/2007  E0.75 INCH       DAVIDSON           TN   PUBLIC

            NEAR BELLEVUE

&&

STEIGERWALDT

Local storm report, Nov 14, 1:38 PM CST, 2 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
138 PM CST WED NOV 14 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0134 PM     HAIL             NASHVILLE               36.17N 86.78W
11/14/2007  E0.75 INCH       DAVIDSON           TN   EMERGENCY MNGR

            DOWNTOWN NASHVILLE

&&

STEIGERWALDT

Local storm report, Nov 14, 1:54 PM CST, 2 hours 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
154 PM CST WED NOV 14 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0150 PM     HAIL             11 SE NASHVILLE         36.06N 86.65W
11/14/2007  E1.25 INCH       DAVIDSON           TN   TRAINED SPOTTER

&&

STEIGERWALDT

Local storm report, Nov 14, 2:10 PM CST, 2 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
210 PM CST WED NOV 14 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0210 PM     HAIL             3 SW MOUNT JULIET       36.18N 86.56W
11/14/2007  E0.75 INCH       WILSON             TN   TRAINED SPOTTER

&&

STEIGERWALDT

Special weather statement, Nov 14, 2:20 PM CST, 2 hours 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
220 PM CST WED NOV 14 2007

TNZ057-060-142100-
HICKMAN-MAURY-
220 PM CST WED NOV 14 2007

...A STRONG THUNDERSTORM WAS AFFECTING HICKMAN COUNTY AND WILL
AFFECT MAURY COUNTY SOON...

AT 218 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 7 MILES WEST OF CENTERVILLE...MOVING EAST AT 30
MPH.

THIS STORM WILL BE NEAR...
  CENTERVILLE BY 230 PM CST.

PEOPLE IN CENTRAL HICKMAN AND NORTHWESTERN MAURY COUNTIES...INCLUDING
THE CITY OF CENTERVILLE...SHOULD MONITOR THE WEATHER SITUATION
CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE
APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

DIME SIZE HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS
STORM.

STEIGERWALDT

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 14, 1:20 PM CST	Severe Thunderstorm Warning	OHX	Davidson	25 min
Nov 14, 1:27 PM CST	Severe Thunderstorm Warning	OHX	Hickman, Perry	33 min
Nov 14, 1:52 PM CST	Severe Thunderstorm Warning	OHX	Davidson, Wilson	23 min
Nov 14, 2:27 PM CST	Severe Thunderstorm Warning	OHX	Wilson	18 min
Nov 14, 3:19 PM CST	Areal Flood Advisory	OHX	Davidson, Rutherford, Wilson	3 hr
Nov 14, 3:27 PM CST	Severe Thunderstorm Warning	OHX	DeKalb, Smith, Wilson	18 min
Nov 14, 3:45 PM CST	Areal Flood Advisory	OHX	DeKalb, Putnam, Smith	3 hr
Nov 14, 3:55 PM CST	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Rutherford, Wilson	20 min
Nov 14, 4:31 PM CST	Severe Thunderstorm Warning	OHX	Giles	29 min
Nov 14, 5:10 PM CST	Areal Flood Advisory	OHX	DeKalb, White	3 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2007 Every severe thunderstorm warning in 2007

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.