Severe Thunderstorm Warning 183, NWS Nashville, TN

654 
WWUS54 KOHX 221916
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
216 PM CDT SUN MAY 22 2011

TNC177-221926-
/O.CAN.KOHX.SV.W.0183.000000T0000Z-110522T1930Z/
WARREN TN-
216 PM CDT SUN MAY 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WARREN COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 3617 8549 3599 8532 3581 8563 3585 8573
      3585 8578 3586 8579 3585 8588 3587 8573
      3604 8568
TIME...MOT...LOC 1916Z 232DEG 30KT 3595 8560

$$

TNC041-141-185-221930-
/O.CON.KOHX.SV.W.0183.000000T0000Z-110522T1930Z/
WHITE TN-DEKALB TN-PUTNAM TN-
216 PM CDT SUN MAY 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
PUTNAM...SOUTHEASTERN DEKALB AND WHITE COUNTIES UNTIL 230 PM CDT...

AT 212 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
WEST OF SPARTA...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  SPARTA AND COOKEVILLE.

LAT...LON 3617 8549 3599 8532 3581 8563 3585 8573
      3585 8578 3586 8579 3585 8588 3587 8573
      3604 8568
TIME...MOT...LOC 1916Z 232DEG 30KT 3595 8560

$$

04

008 
WWUS54 KOHX 221926
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
226 PM CDT SUN MAY 22 2011

TNC041-221936-
/O.CAN.KOHX.SV.W.0183.000000T0000Z-110522T1930Z/
DEKALB TN-
226 PM CDT SUN MAY 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DEKALB COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING MOVED OUT OF THE WARNED AREA.

LAT...LON 3599 8532 3581 8563 3582 8566 3585 8564
      3586 8567 3588 8564 3589 8565 3598 8565
      3599 8563 3602 8563 3605 8567 3617 8549
TIME...MOT...LOC 1926Z 232DEG 30KT 3600 8552

$$

TNC141-185-221930-
/O.CON.KOHX.SV.W.0183.000000T0000Z-110522T1930Z/
WHITE TN-PUTNAM TN-
226 PM CDT SUN MAY 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL
PUTNAM AND WHITE COUNTIES UNTIL 230 PM CDT...

AT 222 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES
NORTHWEST OF SPARTA...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  COOKEVILLE.

LAT...LON 3599 8532 3581 8563 3582 8566 3585 8564
      3586 8567 3588 8564 3589 8565 3598 8565
      3599 8563 3602 8563 3605 8567 3617 8549
TIME...MOT...LOC 1926Z 232DEG 30KT 3600 8552

$$

04

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1245 PM CDT SUN MAY 22 2011

.AVIATION...
EXPECT ISOLATED STRONG STORMS THIS AFTERNOON...SPCLY NOW TIL
20Z...IN EASTERN HALF OF MIDDLE TN GENLY ALONG AND EAST OF I-65
CORRIDOR. OTHERWISE...GOOD CHANCE FOR LIGHT TO MODERATE SHOWERS AT
BOTH BNA/CSV SITES THIS AFTERNOON. SOMEWHAT GUSTY PREVAILING SFC
WINDS THE REST OF THIS AFTERNOON BUT LOCALLY STRONGER IN/NEAR THE
STRONG STORMS. EXTENSIVE CLOUDS OVERNIGHT BUT PRECIP CHANCES WILL
DECREASE AND WIDNS SHOULD BE LIGHT/SOUTHERLY. EXPECT SOME LIGHT
FOG AT CSV FOR SJORT PERIOD CLOSE TO DAYBREAK.

&&

.PREV DISCUSSION... /ISSUED 1144 AM CDT SUN MAY 22 2011/

MESOSCALE UPDATE...
HEATING/MODERATE INSTAB ACR LARGE AREA OF MID TN. HIGHER H8 WINDS
CROSS NW CORNER OF MID TN THIS AFTERNOON W/BEST CHANCE OF DAMAGING
WINDS IN THAT REGION. OTW...ISO STRONG-SVR PULSE STORMS NEXT
1-2HRS ALONG I-65 CORRIDOR W/CAPES APPROACHING 3500 J/KG.

PREV DISCUSSION... /ISSUED 941 AM CDT SUN MAY 22 2011/

MESOSCALE UPDATE...
DEEP SOUTHWEST FLOW WITH NUMEROUS H5 SHORTWAVES RIDING OVR MID TN
TDAY. 22/06Z GFS/NAM H8 WIND MAX MOVES INTO N MID TN THIS AFTN WITH
SHOWERS AND THUNDERSTORMS LIKELY WEST OF THE PLATEAU.

ISO STRONG TO SEVERE STORMS THIS AFTN WITH M/U CAPES OF 2500 J/KG
AND SHOWALTER TO -3. STRONGER STORMS LIKELY IN THE WEST AND NORTH
AS H8 WIND MAX HEADS NE.

PREV DISCUSSION... /ISSUED 706 AM CDT SUN MAY 22 2011/

UPDATE...FOR 22/12 AVIATION FORECAST

AVIATION...
THUNDERSTORMS CURRENTLY FIRING OVER CENTRAL AND SOUTHERN ARKANSAS
WILL MOVE NORTHEASTWARD AND INTO SOUTHWEST TENNESSEE BY 8 AM THIS MORNING.
SOUTHWESTERLY UPPER FLOW IS DEEP SO EXPECT THIS ACTIVITY TO CONTINUE
NORTHEAST AND INTO SOUTHWEST MIDDLE TENNESSEE BETWEEN 9 AM AND 10
AM. COULD SEE A FEW STORMS IN THE NASHVILLE AREA AS EARLY AS NOON.
STRONG TO SEVERE STORMS ARE POSSIBLE.

OUTSIDE OF THUNDERSTORMS GENERALLY VFR AT BNA AND CSV THROUGH THE
NEXT 24 HOURS.

BOYD

PREV DISCUSSION... /ISSUED 252 AM CDT SUN MAY 22 2011/

DISCUSSION...
ANALYSIS SHOWING QUASI-STATIONARY FRONTAL BOUNDARY ACROSS THE
PLAINS...WITH A WEAK WARM FRONT ACROSS THE UPPER MID-WEST/OH
VALLEY. ALOFT...ML/UL RIDGE AXIS NOW EAST ALLOWING SOUTHWEST
FLOW TO DEVELOP ACROSS THE MID-SOUTH. IMPULSE AND POOL OF
MOISTURE CURRENTLY RIDING UP IN FLOW BRINGING ISOLATED SHWRS/STORMS
ACROSS WEST TN TO VERY NEAR THE TN RIVER.

THE CWA WILL REMAIN ML/UL SOUTHWEST FLOW REGIME THRU WEDNESDAY NIGHT
AS UL LOW DRIFTS FROM THE NORTHERN PLAINS THRU THE GREAT LAKES AND
INTO CANADA TODAY THRU LATE MONDAY...THEN A SECONDARY LOW DEVELOPS
IN THE CENTRAL PLAINS TUESDAY AND MOVES JUST NORTH OF THE CWA
LATER THURSDAY. SFC LOW WILL MOVE VERY CLOSE TO UL LOW WHICH WILL
KEEP FRONTAL BOUNDARY NORTH. THIS FRONTAL BOUNDARY WILL EVENTUALLY
LINK WITH DEVELOPING LATE WEEK SFC LOW ASSOCIATED WITH CENTRAL
PLAINS UPPER SYSTEM. ULTIMATELY THE CWA WILL STAY IN WARM SECTOR
WELL INTO THURSDAY. INSTABILITY WILL REMAIN ON THE HIGHER SIDE
WITH CAPES APPROX 1000-3000J/KG AND DECNET SHEAR LARGE PART OF
TIME. WITH SERIES OF MOISTURE SOURCES AND BITS OF ENERGY PASSING...
ISO-SCT SHWRS/STORMS POSSIBLE ANYTIME THRU THIS PERIOD BUT ARE
MOST LIKELY IN PEAK HEATING. SOME MAY EVEN PRODUCE STRONG-
DAMAGING WIND.

ON THURSDAY...BRUNT OF SYSTEM EXPECTED AS COLD FRONT/UL TROF FINALLY
PASS LATE IN THE DAY. THIS WILL INCREASE CONVECTION AS NUMEROUS
STORMS/SQUALL LINE EXPECTED IN THE AFTERNOON/EVENING. AIRMASS WILL
DRY BEHIND THE FEATURES FRIDAY BUT DIVING UL JET LOOKS TO CARVE
OUT FAIRLY SHARP SECONDARY TROF ON SATURDAY...WHICH MAY BRING ISO
STORMS RAPIDLY BACK TO THE AREA.

&&

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

49

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
605 AM CDT SUN MAY 22 2011

TNZ005>011-022>034-056>066-075-077>080-093>095-231030-
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-DE KALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
605 AM CDT SUN MAY 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT...

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY...ESPECIALLY WEST
OF I-65. ISOLATED STRONG TO SEVERE STORMS MAY DEVELOP LATER THIS
MORNING BUT ARE MOST LIKELY THIS AFTERNOON AND EVENING. DAMAGING
WIND IS THE GREATEST THREAT ALTHOUGH HAIL MAY ALSO OCCUR.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

ISOLATED STRONG TO SEVERE THUNDERSTORMS MAY ALSO DEVELOP MONDAY AND
TUESDAY AS THE WEATHER PATTERN CHANGES VERY LITTLE. STRONG GUSTY TO
DAMAGING WIND IS THE PRIMARY THREAT.

.SPOTTER CALL TO ACTION STATEMENT...

EVEN THOUGH ANY SEVERE THUNDERSTORMS ARE EXPECTED TO BE BRIEF AND
ISOLATED, SPOTTERS ARE ENCOURAGED TO CLOSELY MONITOR WEATHER
CONDITIONS AND BE PREPARED TO CALL IN ANYTHING REACHING REPORTING
CRITERIA.

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

07