Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 319, NWS Nashville, TN
NWS Nashville, TN issued this severe thunderstorm warning at Oct 9, 2009, 1:41 PM CDT for Davidson County, Williamson County, Tennessee. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 9, 2009, 1:41 PM CDT (18:41 UTC)
- Expired
- Oct 9, 2009, 2:15 PM CDT
- In force
- 34 min
- Issued by
- NWS Nashville, TN
- Area
- Storm-based polygon
Counties Davidson County, TN, Williamson County, TN
The radar
The Nashville radar (KOHX), 34 km from the middle of the area, began a volume at 18:43 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 9, 12:24 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 6.7 hours before the alert went out and 24 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.
- Mixed-layer CAPE
- 1183 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 667 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 270 m²/s²
- 0-3 km storm-relative helicity
- 259 m²/s²
- Significant tornado parameter
- 2.0
- Supercell composite
- 8.5
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 Oct 9, 10:25 AM CDT, 3 hours 16 minutes earlier.
Area forecast discussion, Oct 9, 10:25 AM CDT, 3 hours 16 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NASHVILLE TN 1025 AM CDT FRI OCT 9 2009 .MESOSCALE UPDATE... CELLS INTENSIFIED UPON CROSSING THE TN RIVER AROUND 15Z. STRONGER CELLS SEEM TO BE TIED TO MOISTURE FLUX GRADIENT WHICH BACKED UP A LITTLE TO THE NORTHWEST DURING THE LAST HOUR. OTHER THAN THE CELL THAT WAS OVER CARROLL COUNTY EARLIER THERE HAS BEEN LITTLE BOWING EVIDENT IN THE CELLS. STILL THINK SOME STORMS COULD GO SEVERE DURING THE DAY...BUT COVERAGE STILL A QUESTION. CELLS SEEM TO BE STRUGGLING TO GAIN MUCH IN THE WAY OF VERTICAL EXTENT BASED ON GRANALYST AND MINIMUM LIGHTNING ACTIVITY SO FAR. && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && BOYD
Hazardous weather outlook, Oct 9, 5:07 AM CDT, 8 hours 34 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE NASHVILLE TN 507 AM CDT FRI OCT 9 2009 TNZ005>011-022>034-056>066-075-077>080-093>095-101000- 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- 507 AM CDT FRI OCT 9 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE. .DAY ONE...TODAY AND TONIGHT AS A STRONG COLD FRONT IS EXPECTED TO MOVE NORTHWEST TO SOUTHEAST ACROSS MIDDLE TENNESSEE TODAY...THUNDERSTORMS ARE EXPECTED TO DEVELOP. SOME OF THESE THUNDERSTORMS COULD POSSIBLY BECOME SEVERE...WITH DAMAGING THUNDERSTORM OUTFLOW WINDS AND THE POSSIBILITY OF THE DEVELOPMENT OF ISOLATED TORNADOES. THE BEST POTENTIAL FOR SEVERE WEATHER DEVELOPMENT WILL BE ALONG AND WEST OF A LAFAYETTE...TO WOODBURY...TO TULLAHOMA LINE. THESE THUNDERSTORMS WILL ALSO BE CAPABLE OF PRODUCING BREIF HEAVY RAINFALL...WITH ISOLATED RAINFALL AMOUNTS OF UP TO TWO INCHES POSSIBLE. THE THREAT FOR SEVERE WEATHER WILL DIMINISH NORTHWEST TO SOUTHEAST TODAY AFTER LOCATIONS EXPERIENCE THE COLD FRONTAL PASSAGE. ALONG WITH THESE THUNDERSTORMS...WILL BE DANGEROUS CLOUD TO GROUND LIGHTNING. EXERCISE CAUTION WITH ANY OUTDOOR ACTIVITIES THAT YOU MIGHT BE ABLE TO PARTICIPATE IN TODAY. REMEMBER...IF THUNDER ROARS...GO INDOORS. EXERCISE CAUTION WHILE DRIVING ON AREA ROADWAYS TODAY AS HEAVY RAINFALL MIGHT RESULT IN PONDING OF WATER ON THESE ROADWAYS. STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER UPDATES ON THIS POSSIBLE DEVELOPING SEVERE WEATHER SITUATION. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER AND EMERGENCY MANAGER ACTIVATION MAY BE NEEDED ON FRIDAY. 31/JBW
In the hours before
Special weather statement, Oct 9, 11:47 AM CDT, 1 hour 54 minutes before
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</html>Special weather statement, Oct 9, 12:30 PM CDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NASHVILLE TN 1230 PM CDT FRI OCT 9 2009 TNZ008>011-027>034-056>066-075-077>080-093>095-091930- SUMNER-MACON-CLAY-PICKETT-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- INCLUDING THE CITIES OF...GALLATIN...LAFAYETTE...CELINA... BYRDSTOWN...NASHVILLE...LEBANON...MOUNT JULIET...HARTSVILLE... CARTHAGE...GAINESBORO...COOKEVILLE...LIVINGSTON...JAMESTOWN... ALLARDT...LINDEN...LOBELVILLE...CENTERVILLE...HOHENWALD... FRANKLIN...BRENTWOOD...COLUMBIA...LEWISBURG...MURFREESBORO... WOODBURY...SMITHVILLE...SPARTA...CROSSVILLE...FAIRFIELD GLADE... SHELBYVILLE...TULLAHOMA...MANCHESTER...MCMINNVILLE...TRACY CITY... ALTAMONT...COALMONT...SPENCER...WAYNESBORO...LAWRENCEBURG... PULASKI 1230 PM CDT FRI OCT 9 2009 ...TORNADO WATCH UNTIL 5 PM CDT FOR MUCH OF MIDDLE TENNESSEE... SUPERCELL STORMS ARE BEGINNING TO DEVELOP AT THIS TIME IN MIDDLE TENNESSEE. DOPPLER WEATHER RADAR INDICATES A SUPERCELL MOVING THROUGH SOUTHEASTERN ROBERTSON COUNTY NEAR GREENBRIER AT 1230 PM CDT...THAT HAS DOWNED TREES IN DICKSON AND HUMPHREYS COUNTIES. THIS STORM WILL PASS NEAR WHITE HOUSE AROUND 1245 PM CDT. BOYD
Local storm report, Oct 9, 12:39 PM CDT, 1 hour 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1239 PM CDT FRI OCT 09 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1155 AM TSTM WND DMG DICKSON 36.08N 87.38W
10/09/2009 DICKSON TN EMERGENCY MNGR
EMA REPORTS TREES DOWN IN DICKSON AND CHARLOTTE AREAS.
&&
MDLocal storm report, Oct 9, 12:47 PM CDT, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1247 PM CDT FRI OCT 09 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1213 PM FUNNEL CLOUD 6 NE ASHLAND CITY 36.34N 86.98W
10/09/2009 CHEATHAM TN TRAINED SPOTTER
FUNNEL CLOUD REPORTED NEAR I-24 NEAR ROBERTSON/DAVIDSON
COUNTY LINES.
&&
MDLocal storm report, Oct 9, 1:37 PM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
137 PM CDT FRI OCT 09 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0111 PM TSTM WND DMG 10 NW NASHVILLE 36.27N 86.91W
10/09/2009 DAVIDSON TN EMERGENCY MNGR
REPORTS OF SEVERAL TREES DOWN AND DAMAGE TRAILERS WITH
POSSIBLE INJURIES.
&&
MDLocal storm report, Oct 9, 1:41 PM CDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
141 PM CDT FRI OCT 09 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0130 PM TSTM WND DMG 8 NW NASHVILLE 36.25N 86.89W
10/09/2009 DAVIDSON TN EMERGENCY MNGR
TREES REPORTED DOWN NEAR OLD HICKORY BLVD AND SHUTES
LANE.
&&
MDThe office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 9, 12:02 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Robertson | 28 min |
| Oct 9, 12:16 PM CDT | Severe Thunderstorm Warning | OHX | Davidson, Robertson, Sumner | 44 min |
| Oct 9, 12:47 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Williamson | 28 min |
| Oct 9, 12:48 PM CDT | Severe Thunderstorm Warning | OHX | Macon, Sumner | 27 min |
| Oct 9, 1:25 PM CDT | Severe Thunderstorm Warning | OHX | Davidson, Sumner, Wilson | 35 min |
| Oct 9, 2:11 PM CDT | Severe Thunderstorm Warning | OHX | Maury | 22 min |
| Oct 9, 2:20 PM CDT | Severe Thunderstorm Warning | OHX | Wilson | 25 min |
| Oct 9, 2:23 PM CDT | Severe Thunderstorm Warning | OHX | Clay, Jackson, Macon, Smith | 22 min |
| Oct 9, 2:43 PM CDT | Severe Thunderstorm Warning | OHX | Clay, Jackson | 32 min |
| Oct 9, 3:16 PM CDT | Severe Thunderstorm Warning | OHX | Fentress, Pickett | 19 min |
| Oct 9, 3:17 PM CDT | Severe Thunderstorm Warning | OHX | Bedford, Marshall, Maury | 28 min |
| Oct 9, 3:18 PM CDT | Severe Thunderstorm Warning | OHX | Fentress, Pickett | 28 min |
| Oct 9, 3:21 PM CDT | Tornado Warning | OHX | Giles, Marshall | 24 min |
| Oct 9, 3:24 PM CDT | Tornado Warning | OHX | Coffee | 36 min |
| Oct 9, 3:38 PM CDT | Tornado Warning | OHX | Bedford, Marshall | 37 min |
| Oct 9, 3:59 PM CDT | Tornado Warning | OHX | Bedford, Cannon, Coffee, Rutherford | 31 min |
| Oct 9, 4:07 PM CDT | Tornado Warning | OHX | Bedford, Coffee | 23 min |
| Oct 9, 4:23 PM CDT | Tornado Warning | OHX | Coffee, Warren | 37 min |
| Oct 9, 4:51 PM CDT | Severe Thunderstorm Warning | OHX | Grundy | 24 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2009Every 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.