Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 140, NWS Nashville, TN

May 16, 2009Clay County, Jackson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 16, 2009, 3:01 PM CDT for Clay County, Jackson County, Tennessee. It was in force for 29 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: May 16, 2009, 3:01 PM CDT (20:01 UTC)
Expired: May 16, 2009, 3:30 PM CDT
In force: 29 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Clay County, TN, Jackson County, TN

The radar

The Nashville radar (KOHX), 89 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 96 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: 1150 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 703 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 16, 11:13 AM CDT, 3 hours 48 minutes earlier.

Area forecast discussion, May 16, 11:13 AM CDT, 3 hours 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1113 AM CDT SAT MAY 16 2009

.MESO UPDATE...
BROKEN LINE OF STORMS FORMING ALONG COLD FRONT IN NW CORNER OF
MIDSTATE. HEATING ACR SOUTH/EAST MID TN IS EXPECTED TO GENERATE
1500-2500 J/KG B/L CAPES AHEAD OF FRONT. LOW SHEAR EVENT.

INSTAB AND LIFT ENOUGH FOR SOME HAIL. BUT LARGER CONCERN IS FOR
HEAVY RAINFALL IN SOUTH/EAST MID TN. WL POST A FLASH FLOOD WATCH
THIS AFTERNOON AND TONIGHT FOR THESE AREA...AND INCLUDE METRO
NASHVILLE. 1-3 INCHES OF RAINFALL POSSIBLE.

&&

.PREV DISCUSSION... /ISSUED 455 AM CDT SAT MAY 16 2009/

MESOSCALE UPDATE 02...
SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP ACROSS WESTERN
MIDDLE TN FROM THE TENNESSEE RIVER TO ABOUT 50 MILES EAST OF THE
TENNESSEE RIVER. THIS REMAINS AN AREA OF RATHER STEEP MID-LEVEL
LAPSE RATES ON THE ORDER OF 7 DEGS CELSIUS PER KM. ALSO...VWP OFF
OHX DOPPLER SHOWS 40 KT LOW LEVEL JET WHICH HAS STRENGTHENED OVER
THE LAST HOUR WORKING ACROSS THIS AREA. ALSO OF CONCERN AT THIS TIME
IS OUTFLOW BOUNDARY DROPPING SOUTHEAST OUT OF WESTERN KY AND INTO
NORTHWEST MIDDLE TN DURING THE NEXT HOUR. THIS BOUNDARY MOST
LIKELY WILL ACT TO INCREASE COVERAGE ALONG WITH TSTM INTENSITIES
THAT MAY LEAD TO LOCALLY HEAVY RAINFALL. 1 TO 2 INCH RAINFALL
AMOUNTS COULD OCCUR WITHIN AN HR WHICH WOULD LEAD TO SWOLLEN
CREEKS AND STREAMS.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH THROUGH THIS EVENING FOR TNZ011-027-028-
030>034-058>066-075-077>080-093>095.

&&

04

Hazardous weather outlook, May 16, 5:17 AM CDT, 9 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
517 AM CDT SAT MAY 16 2009

TNZ005>011-022>034-056>066-075-077>080-093>095-171030-
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-
517 AM CDT SAT MAY 16 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TONIGHT

STRONG TO LOCALLY SEVERE THUNDERSTORMS ARE POSSIBLE TODAY AND THIS
EVENING. GUSTY WIND AND PEA TO MARBLE SIZED HAIL WILL BE THE MAIN
THREAT. LOCALLY HEAVY RAIN MAY ALSO OCCUR...WHICH MAY LEAD TO STANDING
WATER ON ROADWAYS AND MINOR FLOODING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

07

In the hours before

Local storm report, May 16, 1:49 PM CDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
149 PM CDT SAT MAY 16 2009

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

0145 PM     HAIL             1 S BRENTWOOD           35.98N 86.79W
05/16/2009  E0.75 INCH       WILLIAMSON         TN   TRAINED SPOTTER

            AT TEMPLE HILL GOLF COURSE

&&

TROUTMAN

Local storm report, May 16, 1:55 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NASHVILLE TN
155 PM CDT SAT MAY 16 2009

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

0140 PM     TSTM WND GST     12 NW LEBANON           36.33N 86.47W
05/16/2009  M40.00 MPH       SUMNER             TN   NWS EMPLOYEE

            WIND GUST MEASURED AT NATIONAL WEATHER SERVICE OFFICE IN
            OLD HICKORY.

0145 PM     HAIL             1 S BRENTWOOD           35.98N 86.79W
05/16/2009  E0.75 INCH       WILLIAMSON         TN   TRAINED SPOTTER

            AT TEMPLE HILL GOLF COURSE

&&

JBW

Local storm report, May 16, 2:32 PM CDT, 29 minutes before

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Special weather statement, May 16, 2:32 PM CDT, 29 minutes before

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Local storm report, May 16, 2:39 PM CDT, 22 minutes before

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Local storm report, May 16, 2:59 PM CDT, 2 minutes before

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  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 8:51 AM CDT	River Flood Advisory	OHX	Decatur, Hardin, Perry, Wayne	22 hr
May 16, 11:27 AM CDT	Flash Flood Watch	OHX	Bedford, Cannon, Coffee, Cumberland, Davidson, DeKalb and 19 more	10 hr
May 16, 12:15 PM CDT	Severe Thunderstorm Warning	OHX	Perry	45 min
May 16, 12:49 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Robertson	26 min
May 16, 1:49 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	56 min
May 16, 2:04 PM CDT	Severe Thunderstorm Warning	OHX	Maury	26 min
May 16, 2:13 PM CDT	Flash Flood Warning	OHX	Perry	3 hr
May 16, 2:16 PM CDT	Severe Thunderstorm Warning	OHX	Lewis, Maury	29 min
May 16, 2:35 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford	25 min
May 16, 2:38 PM CDT	Severe Thunderstorm Warning	OHX	Smith, Trousdale, Wilson	22 min
May 16, 2:59 PM CDT	Severe Thunderstorm Warning	OHX	Putnam	31 min
May 16, 3:13 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Overton, Putnam	32 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.