Alert archive / Tennessee / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 192, NWS Nashville, TN

October 10, 2014Bedford County, Coffee County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Oct 10, 2014, 12:49 PM CDT for Bedford County, Coffee County, Tennessee. It was in force for 41 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: Oct 10, 2014, 12:49 PM CDT (17:49 UTC)
Expired: Oct 10, 2014, 1:30 PM CDT
In force: 41 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Bedford County, TN, Coffee County, TN

The radar

The Northeast Alabama radar (KHTX), 69 km from the middle of the area, began a volume at 17:50 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 12:00Z, 5.8 hours before the alert went out and 74 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: 131 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

835 
WUUS54 KOHX 101749
SVROHX
TNC003-031-101830-
/O.NEW.KOHX.SV.W.0192.141010T1749Z-141010T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1249 PM CDT FRI OCT 10 2014

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL BEDFORD COUNTY IN MIDDLE TENNESSEE...
  NORTHERN COFFEE COUNTY IN MIDDLE TENNESSEE...

* UNTIL 130 PM CDT

* AT 1246 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH. THE STORM WAS NEAR SHELBYVILLE...MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MANCHESTER...WARTRACE AND NORMANDY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3542 8646 3553 8649 3566 8612 3565 8609
      3564 8603 3545 8597
TIME...MOT...LOC 1750Z 256DEG 20KT 3549 8637

$$

27

1 follow-up statement

778 
WWUS54 KOHX 101806
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
106 PM CDT FRI OCT 10 2014

TNC003-031-101830-
/O.CON.KOHX.SV.W.0192.000000T0000Z-141010T1830Z/
BEDFORD TN-COFFEE TN-
106 PM CDT FRI OCT 10 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM CDT
FOR NORTHERN COFFEE AND EAST CENTRAL BEDFORD COUNTIES...

AT 105 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH.  THIS STORM WAS LOCATED NEAR NORMANDY...MOVING EAST AT 25
MPH.

LOCATIONS IMPACTED INCLUDE...
  MANCHESTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3555 8636 3566 8612 3565 8609 3564 8603
      3545 8597 3544 8632
TIME...MOT...LOC 1806Z 256DEG 20KT 3550 8626

$$

27

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 10, 11:44 AM CDT, 1 hour 5 minutes earlier.

Area forecast discussion, Oct 10, 11:44 AM CDT, 1 hour 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1144 AM CDT FRI OCT 10 2014

.UPDATE...

TEMPS ARE TRENDING A COUPLE OF DEGREES COOLER OVER AREAS NORTH OF
I-40 THIS MORNING...SO WENT AHEAD AND LOWERED HIGH TEMP FORECAST
FOR THAT AREA. CURRENT RADAR HAS MOST OF THE ACTIVITY IN MIDDLE
TENNESSEE LIMITED TO AREAS SOUTH OF INTERSTATE 40. THIS IS WHERE
CONTINUED DEVELOPMENT IS EXPECTING AS WE GO THROUGHOUT THE
AFTERNOON HOURS. SOME STORMS COULD BECOME STRONG WITH HEAVY
RAINFALL AND GUSTY WINDS. THE SURFACE BOUNDARY DRAPED ACROSS
SOUTHERN KY WON'T MOVE TOO MUCH TODAY...BUT MAY SINK SOUTH...INTO
NORTHERN MIDDLE TN THIS AFTERNOON...SO WILL BE WATCHING FOR
LOCALIZED FLOODING CONCERNS AS SHOWERS AND STORMS COULD
POTENTIALLY TRAIN OVER THE SAME AREAS.

&&

.PREV DISCUSSION... /ISSUED 632 AM CDT FRI OCT 10 2014/

UPDATE...FOR 12Z AVIATION FORECASTS.

AVIATION...EXPECT SHOWERS AND THUNDERSTORMS TO BECOME WIDESPREAD
ACROSS THE CKV-BNA-CSV CORRIDOR TODAY.

AT CKV...EXPECT A MIX OF MVFR AND IFR CONDITIONS FOR MOST OF THE
FORECAST PERIOD.

AT BNA...BELIEVE MVFR CONDITIONS EARLY TODAY WILL GIVE WAY TO VFR
CONDITIONS BY LATE MORNING, ALTHOUGH MVFR CONDITIONS WILL BECOME
MORE FREQUENT AGAIN THIS AFTERNOON AS THUNDERSTORMS BECOME
INCREASINGLY WIDESPREAD. MOSTLY MVFR CONDITIONS FORECAST TONIGHT,
WITH IFR CIGS PSBL AFTER 08Z.

AT CSV...EXPECT A MIX OF VFR AND MVFR CONDITIONS THIS MORNING, TO
GIVE MAY MAINLY TO MVFR CONDITIONS BY AFTERNOON AS THUNDERSTORMS
BECOME INCREASINGLY WIDESPREAD. A MIX OF VFR AND MVFR EXPECTED FOR
MUCH OF THE OVERNIGHT, WITH A TREND TOWARD MVFR AND IFR CONDITIONS
AFTER 08Z.

&&

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

&&

11

Hazardous weather outlook, Oct 10, 10:19 AM CDT, 2 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
1019 AM CDT FRI OCT 10 2014

TNZ005>011-023>034-056>066-075-077>080-093>095-111330-
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-
830 AM CDT FRI OCT 10 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT.

THUNDERSTORMS ARE FORECAST FOR MIDDLE TENNESSEE TODAY AND TONIGHT.
SOME STORMS WILL BE STRONG...WITH HEAVY DOWNPOURS AND GUSTY WINDS.
PONDING OF WATER IS EXPECTED IN LOW LYING SPOTS...ESPECIALLY WHERE A
NUMBER OF THUNDERSTORMS TRAIN ACROSS THE SAME AREA.

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

ADDITIONAL ROUNDS OF THUNDERSTORMS ARE FORECAST OVER THE WEEKEND
AND INTO EARLY NEXT WEEK...WILL INCREASE THE POSSIBILITY FOR FOR
FLASH FLOODING. ISOLATED SEVERE STORMS ARE EXPECTED LATE MONDAY
INTO EARLY TUESDAY...AS A STRONG COLD FRONT SWEEPS THROUGH.

.SPOTTER CALL TO ACTION STATEMENT...

SPOTTERS AND LOCAL EMERGENCY MANAGEMENT OFFICIALS ARE ENCOURAGED
TO REPORT SEVERE WEATHER AND HEAVY RAINFALL AMOUNTS TO THE
NATIONAL WEATHER SERVICE IN NASHVILLE.

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

27

In the hours before

Special weather statement, Oct 10, 10:30 AM CDT, 2 hours 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1030 AM CDT FRI OCT 10 2014

TNZ057-058-060-094-101615-
HICKMAN-LAWRENCE-LEWIS-MAURY-
1030 AM CDT FRI OCT 10 2014

...SIGNIFICANT WEATHER ADVISORY FOR HICKMAN...LAWRENCE...LEWIS AND
MAURY COUNTIES...

AT 1025 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A STRONG THUNDERSTORM NEAR SUMMERTOWN...MOVING NORTHEAST AT
25 MPH.

SOME LOCATIONS IN THE PATH INCLUDE GORDONSBURG...SUMMERTOWN...
HAMPSHIRE...MOUNT PLEASANT...WILLIAMSPORT...COLUMBIA AND SANTA FE.

WINDS 30 TO 40 MPH AND TORRENTIAL RAINFALL ARE EXPECTED WITH THIS
STORM.

LAT...LON 3582 8713 3562 8690 3541 8733 3558 8748

11

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 7:00 PM CDT	Severe Thunderstorm Warning	OHX	Dickson	32 min
Oct 10, 12:36 AM CDT	Special Weather Statement	OHX	Dickson	54 min
Oct 10, 1:02 AM CDT	Special Weather Statement	OHX	Dickson	43 min
Oct 10, 1:49 AM CDT	Special Weather Statement	OHX	Davidson	41 min
Oct 10, 5:25 AM CDT	Special Weather Statement	OHX	Macon	35 min
Oct 10, 10:30 AM CDT	Special Weather Statement	OHX	Maury	45 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.