Alert archive / Tennessee / Special Weather Statements in 2015

Special Weather Statement, NWS Nashville, TN

August 19, 2015Overton County, Tennessee

NWS Nashville, TN issued this special weather statement at Aug 19, 2015, 5:01 PM CDT for Overton 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 outline as issued.

The facts

Issued: Aug 19, 2015, 5:01 PM CDT (22:01 UTC)
Expired: Aug 19, 2015, 5:30 PM CDT
In force: 29 min
Issued by: NWS Nashville, TN

County Overton County, TN

The radar

The Nashville radar (KOHX), 107 km from the middle of the area, began a volume at 22:03 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, 10.0 hours before the alert went out and 113 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: 513 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 927 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 19, 2:21 PM CDT, 2 hours 40 minutes earlier.

Area forecast discussion, Aug 19, 2:21 PM CDT, 2 hours 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
221 PM CDT WED AUG 19 2015

.DISCUSSION...SURFACE MAP SHOWS A COLD FRONT SITUATED JUST WEST
OF THE MISSISSIPPI RIVER THIS HOUR, WITH SCATTERED STORMS FIRING
ACROSS MIDDLE TENNESSEE IN THE WARM, HUMID & UNSTABLE PRE-FRONTAL
AIR MASS. LOOK FOR THE ACTIVITY TO INCREASE IN COVERAGE AS WE HEAD
INTO THE EVENING AND THE FRONT DRAWS CLOSER. MOST OF MIDDLE
TENNESSEE REMAINS UNDER A SLIGHT RISK OF SEVERE STORMS THIS
AFTERNOON AND TONIGHT, WITH FROPA NOT OCCURRING UNTIL LATE TONIGHT
AND EARLY TOMORROW MORNING. THE FRONTAL BOUNDARY IS THEN EXPECTED
TO STALL OVER THE TENNESSEE VALLEY, THEREBY KEEPING LOW POP'S
ACROSS OUR SOUTH THROUGH FRIDAY WHEN HIGH PRESSURE FINALLY PUSHES
THE MOISTURE SOUTHWARD. A SECOND SYSTEM WILL DEVELOP IN QUICK
SUCCESSION OVER THE ARK-LA-TEX DURING THE WEEKEND, RE-INTRODUCING
ISOLATED TO SCATTERED POP'S, WITH A SUBSEQUENT SURFACE FRONT
COMING THROUGH ON MONDAY. AFTER THIS, LOOK FOR STRONG HIGH
PRESSURE TO BUILD IN FROM THE WEST AND KEEP US DRY AND COOLER AT
LEAST THROUGH WEDNESDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      67  79  62  83 /  80  40  10  10
CLARKSVILLE    62  78  59  82 /  90  20  10  10
CROSSVILLE     68  75  61  78 /  80  70  20  10
COLUMBIA       68  79  61  83 /  80  50  20  10
LAWRENCEBURG   69  78  63  82 /  70  60  20  20
WAVERLY        63  79  61  83 /  90  30  10  10

&&

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

&&

08

Hazardous weather outlook, Aug 19, 12:09 PM CDT, 4 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
1209 PM CDT WED AUG 19 2015

TNZ005>011-023>034-056>066-075-077>080-093>095-201715-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-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-
1209 PM CDT WED AUG 19 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF MIDDLE
TENNESSEE.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE STORMS FOR ALL OF MIDDLE
TENNESSEE THIS AFTERNOON AND EARLY TONIGHT AS A COLD FRONT
PASSES. THE MAIN THREAT IS DAMAGING WIND...AND POSSIBLY
LOCALIZED FLASH FLOODING FROM HEAVY DOWNPOURS. LARGE HAIL IS
ALSO NOT OUT OF THE QUESTION BUT CHANCES ARE SMALL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY.

In the hours before

Special weather statement, Aug 19, 3:27 PM CDT, 1 hour 34 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
327 PM CDT WED AUG 19 2015

TNZ009-010-192100-
MACON TN-CLAY TN-
327 PM CDT WED AUG 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CLAY AND CENTRAL
MACON COUNTIES UNTIL 400 PM CDT...

AT 326 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
LAFAYETTE...MOVING NORTHEAST AT 30 MPH.

WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
LAFAYETTE...RED BOILING SPRINGS...BOLES...BUGTUSSLE AND MOSS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO MINOR FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3662 8561 3656 8558 3645 8607 3654 8612
      3663 8598
TIME...MOT...LOC 2026Z 242DEG 25KT 3654 8598

11

Special weather statement, Aug 19, 3:50 PM CDT, 1 hour 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
350 PM CDT WED AUG 19 2015

TNZ028>030-192115-
TROUSDALE TN-SMITH TN-WILSON TN-
350 PM CDT WED AUG 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL WILSON...SOUTHWESTERN
SMITH AND SOUTHWESTERN TROUSDALE COUNTIES UNTIL 415 PM CDT...

AT 350 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
LEBANON...MOVING EAST AT 25 MPH.

WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  WATERTOWN AROUND 410 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE DICKERSON CHAPEL
RECREATION AREA AND TUCKERS CROSSROADS.

LAT...LON 3610 8602 3613 8637 3630 8633 3638 8608
TIME...MOT...LOC 2050Z 265DEG 23KT 3621 8629

11

Special weather statement, Aug 19, 4:22 PM CDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
422 PM CDT WED AUG 19 2015

TNZ028-030-064-192200-
DE KALB TN-SMITH TN-WILSON TN-
422 PM CDT WED AUG 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WILSON...SOUTHERN
SMITH AND NORTHWESTERN DE KALB COUNTIES UNTIL 500 PM CDT...

AT 422 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
WATERTOWN...OR 10 MILES SOUTHWEST OF CARTHAGE...MOVING EAST AT 30
MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
CARTHAGE...WATERTOWN...GORDONSVILLE...HICKMAN...SOUTH CARTHAGE...
ALEXANDRIA...CENTER HILL LAKE...EDGAR EVANS STATE PARK AND TUCKERS
CROSSROADS.

LAT...LON 3604 8580 3601 8616 3626 8618 3630 8585
TIME...MOT...LOC 2122Z 260DEG 24KT 3614 8606

SHAMBURGER

Special weather statement, Aug 19, 4:40 PM CDT, 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
440 PM CDT WED AUG 19 2015

TNZ031-192215-
JACKSON TN-
440 PM CDT WED AUG 19 2015

...SIGNIFICANT WEATHER ADVISORY FOR JACKSON COUNTY UNTIL 515 PM
CDT...

AT 440 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
GAINESBORO...MOVING EAST AT 35 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
GAINESBORO...GRANVILLE AND WHITLEYVILLE.

LAT...LON 3647 8558 3647 8557 3640 8550 3632 8549
      3625 8579 3625 8582 3629 8585 3633 8584
      3634 8583 3644 8582 3650 8567
TIME...MOT...LOC 2140Z 250DEG 31KT 3636 8578

SHAMBURGER

Special weather statement, Aug 19, 5:00 PM CDT, 1 minute before

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Special weather statement, Aug 19, 5:01 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 1:34 PM CDT	Special Weather Statement	OHX	Dickson	26 min
Aug 19, 2:01 PM CDT	Special Weather Statement	OHX	Cheatham	29 min
Aug 19, 2:25 PM CDT	Special Weather Statement	OHX	Sumner	35 min
Aug 19, 2:38 PM CDT	Areal Flood Advisory	OHX	Sumner	2 hr
Aug 19, 3:00 PM CDT	Special Weather Statement	OHX	Davidson	30 min
Aug 19, 3:05 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Rutherford, Williamson	25 min
Aug 19, 3:19 PM CDT	Special Weather Statement	OHX	Hickman	41 min
Aug 19, 3:27 PM CDT	Special Weather Statement	OHX	Macon	33 min
Aug 19, 3:50 PM CDT	Special Weather Statement	OHX	Wilson	25 min
Aug 19, 4:22 PM CDT	Special Weather Statement	OHX	Smith	38 min
Aug 19, 4:40 PM CDT	Special Weather Statement	OHX	Jackson	35 min
Aug 19, 4:42 PM CDT	Severe Thunderstorm Warning	OHX	Jackson	20 min
Aug 19, 4:50 PM CDT	Areal Flood Advisory	OHX	Hickman, Perry	5 hr
Aug 19, 5:00 PM CDT	Special Weather Statement	OHX	DeKalb	30 min
Aug 19, 5:31 PM CDT	Special Weather Statement	OHX	DeKalb, White	44 min
Aug 19, 6:29 PM CDT	Areal Flood Advisory	OHX	Cumberland, DeKalb, Putnam, White	3 hr

Nearby

Special Weather Statements in Tennessee, 2015 Every special weather statement in 2015

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.