Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 45, NWS Nashville, TN

May 23, 2014Fentress County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 23, 2014, 5:14 AM CDT for Fentress County, Tennessee. It was in force for 31 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: May 23, 2014, 5:14 AM CDT (10:14 UTC)
Expired: May 23, 2014, 5:45 AM CDT
In force: 31 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Fentress County, TN

The radar

The Knoxville radar (KMRX), 126 km from the middle of the area, began a volume at 10:15 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 00:00Z, 10.2 hours before the alert went out and 165 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: 1786 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1377 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 12 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.5

Open this sounding in Storm Lab

The text

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

367 
WUUS54 KOHX 231014
SVROHX
TNC049-231045-
/O.NEW.KOHX.SV.W.0045.140523T1014Z-140523T1045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
514 AM CDT FRI MAY 23 2014

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL FENTRESS COUNTY IN MIDDLE TENNESSEE...

* UNTIL 545 AM CDT

* AT 511 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED JUST
  WEST SOUTHWEST OF JAMESTOWN...MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  JAMESTOWN AND ALLARDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3636 8470 3637 8472 3634 8473 3633 8477
      3629 8479 3629 8483 3628 8484 3634 8511
      3652 8506 3647 8470 3643 8469 3641 8466
      3640 8466
TIME...MOT...LOC 1014Z 282DEG 41KT 3641 8497

$$

FORECASTER:
19

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 23, 3:08 AM CDT, 2 hours 6 minutes earlier.

Area forecast discussion, May 23, 3:08 AM CDT, 2 hours 6 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
308 AM CDT FRI MAY 23 2014

.DISCUSSION....THE FRONT RESPONSIBLE FOR SCATTERED THUNDERSTORMS
OVER OUR NORTHERN COUNTIES THURSDAY AFTERNOON THROUGH THIS MORNING
WAS LOCATED JUST SOUTH OF THE KY STATE LINE. THIS FRONT WILL
CONTINUE TO PUSH SLOWLY SOUTHWARD TODAY WITH A 20-30 PERCENT
CHANCE FOR THUNDERSTORMS ACROSS THE AREA. THERE WILL BE SOME
POTENTIAL FOR STRONG TO BRIEFLY SEVERE STORMS TODAY...MAINLY ALONG
AND SOUTH OF I-40. ALTHOUGH THE SEVERE POTENTIAL APPEARS A LITTLE
LESS THAN YESTERDAY...FORECAST SOUNDINGS SHOW CAPES GREATER THAN 2
KJ/KG ON THE SOUTH SIDE OF THE BOUNDARY THIS AFTERNOON. DAMAGING
WIND GUSTS WILL BE THE MAIN CONCERN.

A FEW STORMS MAY LINGER INTO THE EVENING OVER OUR SOUTHWEST
COUNTIES. OTHERWISE...SLIGHTLY COOLER AND DRIER AIR WILL BE
PUSHING IN FROM THE NNE TONIGHT.

SATURDAY WILL PROBABLY BE THE NICEST DAY OF THIS FORECAST PERIOD.
SURFACE HIGH PRESSURE OVER THE GREAT LAKES WILL EXTEND DOWN INTO
TN WITH SEASONABLY WARM TEMPERATURES AND TOLERABLE HUMIDITY
LEVELS. WE CANNOT RULE OUT AN ISOLATED THUNDERSTORM OVER OUR
SOUTHWEST COUNTIES WHERE MOISTURE WILL BE A LITTLE GREATER.

FOR SUNDAY INTO MEMORIAL DAY...TEMPS WILL WARM AGAIN AS THE COOL
SURFACE HIGH PRESSURE LIFTS AWAY AND UPPER HEIGHTS RISE. THERE WILL
BE A SMALL CHANCE FOR THUNDERSTORMS EACH DAY AS MOISTURE AND
INSTABILITY GRADUALLY INCREASES. TEMPS WILL PUSH WELL INTO THE
80S...PERHAPS REACHING THE FIRST 90 OF THE YEAR FOR SOME
LOCATIONS.

IN THE EXTENDED FORECAST...MODELS SHOW MAJOR DIFFERENCES. THE
ECMWF BRINGS A CUTOFF LOW SLOWLY EASTWARD FROM THE PLAINS STATES
TO THE MID SOUTH THROUGH THE WEEK...RESULTING IN UNSETTLED AND
POSSIBLY VERY WET CONDITIONS. THE GEFS POINTS TO A GREATER
INFLUENCE FROM A NORTHEAST TROUGH AND AN ASSOCIATED BACKDOOR COLD
FRONT. THIS SCENARIO WOULD BRING A SHOT OF COOLER AND DRY WX MID
TO LATE WEEK. GIVEN THE UNCERTAINTIES...INCLUDING VARIABILITY
WITHIN EACH MODEL ENSEMBLE SUITE...WE WILL CONTINUE TO USE AN ALL
MODEL BLEND YIELDING GRADUALLY LOWERING TEMPS AND PERSISTENT LOW
POPS.

13

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      84  60  84  61 /  30  20  05  05
CLARKSVILLE    83  57  83  58 /  20  10  10  05
CROSSVILLE     79  53  78  53 /  20  10   0  05
COLUMBIA       86  61  84  62 /  20  20  10  05
LAWRENCEBURG   87  62  84  62 /  20  20  10  05
WAVERLY        84  59  83  60 /  30  20  10  05

&&

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

&&

Hazardous weather outlook, May 23, 2:48 AM CDT, 2 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
248 AM CDT FRI MAY 23 2014

TNZ005>011-023>034-056>066-075-077>080-093>095-240800-
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-
248 AM CDT FRI MAY 23 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED THUNDERSTORMS ARE EXPECTED TODAY AND THIS EVENING OVER
ABOUT THE SOUTHWESTERN TWO THIRDS OF MIDDLE TENNESSEE...AND A FEW
OF THOSE STORMS COULD BECOME STRONG TO SEVERE...WITH GUSTY
WINDS...HAIL AND HEAVY DOWNPOURS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.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

19

In the hours before

Special weather statement, May 23, 12:41 AM CDT, 4 hours 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1241 AM CDT FRI MAY 23 2014

TNZ008-009-230630-
MACON-SUMNER-
1241 AM CDT FRI MAY 23 2014

...SIGNIFICANT WEATHER ADVISORY FOR MACON AND SUMNER COUNTIES...

AT 1233 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A STRONG THUNDERSTORM NEAR PORTLAND...MOVING EAST SOUTHEAST
AT 25 MPH.

SOME LOCATIONS IN THE PATH INCLUDE WESTMORELAND.

PENNY SIZE HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3665 8635 3665 8633 3663 8612 3653 8615
      3663 8651 3666 8650 3666 8638 3666 8635

19

Special weather statement, May 23, 4:28 AM CDT, 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
428 AM CDT FRI MAY 23 2014

TNZ010-011-033-034-231015-
CLAY-FENTRESS-OVERTON-PICKETT-
428 AM CDT FRI MAY 23 2014

...SIGNIFICANT WEATHER ADVISORY FOR CLAY...FENTRESS...OVERTON AND
PICKETT COUNTIES...

AT 423 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A FEW STRONG THUNDERSTORMS JUST NORTH OF THE KENTUCKY LINE...NORTH
OF CELINA...MOVING EAST SOUTHEAST AT 45 MPH.

SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE DALE HOLLOW LAKE
...BYRDSTOWN...STATIC AND PALL MALL.

PENNY SIZE HAIL...WINDS 30 TO 40 MPH...AND BRIEF HEAVY DOWNPOURS
ARE EXPECTED WITH THESE STORMS AS THEY PASS THROUGH EARLY THIS MORNING.

LAT...LON 3661 8483 3643 8489 3658 8575 3663 8572
      3662 8549 3663 8532 3663 8507

19

Special weather statement, May 23, 5:02 AM CDT, 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
502 AM CDT FRI MAY 23 2014

TNZ011-033-034-231045-
FENTRESS-OVERTON-PICKETT-
502 AM CDT FRI MAY 23 2014

...SIGNIFICANT WEATHER ADVISORY FOR FENTRESS...OVERTON AND PICKETT
COUNTIES...

STRONG STORMS...WITH HALF INCH HAIL...STRONG GUSTY WINDS...AND FREQUENT
LIGHTNING STRIKES...WILL AFFECT NORTHEAST MIDDLE TENNESSEE EARLY
THIS MORNING.

AT 454 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A CLUSTER OF STRONG THUNDERSTORMS BETWEEN BYRDSTOWN AND STANDING STONE
STATE PARK...MOVING EAST AT 40 MPH.

SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE BYRDSTOWN...JAMESTOWN
AND ALLARDT.

HALF INCH SIZE HAIL...WIND GUSTS AROUND 40 MPH...AND TORRENTIAL DOWNPOURS
OF RAIN ARE EXPECTED WITH THESE STORMS. A GREAT DEAL OF LIGHTNING IS
ALSO INDICATED WITH THESE STORMS.

LAT...LON 3636 8471 3637 8472 3635 8473 3631 8478
      3628 8484 3629 8486 3627 8487 3621 8492
      3642 8547 3647 8531 3662 8523 3660 8478
      3640 8466

19

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 12:41 AM CDT	Special Weather Statement	OHX	Sumner	49 min
May 23, 4:28 AM CDT	Special Weather Statement	OHX	Clay, Pickett	47 min
May 23, 5:02 AM CDT	Special Weather Statement	OHX	Fentress, Pickett	43 min
May 23, 3:36 PM CDT	Special Weather Statement	OHX	Williamson	39 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2014 Every severe thunderstorm warning in 2014

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.