Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 239, NWS Nashville, TN

June 9, 2011Fentress County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jun 9, 2011, 11:44 AM CDT for Fentress County, Tennessee. It was in force for 14 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: Jun 9, 2011, 11:44 AM CDT (16:44 UTC)
Expired: Jun 9, 2011, 11:58 AM CDT
In force: 14 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Fentress County, TN

The radar

The Knoxville radar (KMRX), 133 km from the middle of the area, began a volume at 16:45 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, 4.7 hours before the alert went out and 155 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: 2852 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

445 
WUUS54 KOHX 091644
SVROHX
TNC049-091715-
/O.NEW.KOHX.SV.W.0239.110609T1644Z-110609T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1144 AM CDT THU JUN 9 2011

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

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

* UNTIL 1215 PM CDT

* AT 1144 AM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...
  AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS NEAR HIGH
  POINT...MOVING EAST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  RURAL SOUTHERN FENTRESS COUNTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2. DO NOT
STAY OUTDOORS IF YOU ARE IN THE PATH OF SEVERE THUNDERSTORMS.

&&

LAT...LON 3628 8486 3627 8487 3623 8487 3621 8489
      3618 8489 3617 8492 3629 8497 3629 8484
      3628 8484
TIME...MOT...LOC 1644Z 256DEG 4KT 3623 8491

$$

FORECASTER: 31

1 follow-up statement

030 
WWUS54 KOHX 091658
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1158 AM CDT THU JUN 9 2011

TNC049-091708-
/O.CAN.KOHX.SV.W.0239.000000T0000Z-110609T1715Z/
FENTRESS TN-
1158 AM CDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL FENTRESS COUNTY
IS CANCELLED...

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

LAT...LON 3628 8486 3627 8487 3623 8487 3621 8489
      3618 8489 3617 8492 3629 8497 3629 8484
      3628 8484
TIME...MOT...LOC 1658Z 256DEG 4KT 3623 8489

$$
31

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 Jun 9, 11:04 AM CDT, 40 minutes earlier.

Area forecast discussion, Jun 9, 11:04 AM CDT, 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1104 AM CDT THU JUN 9 2011

.UPDATE...
AREA OF CU PLAT WITH UNSTABLE MORNING SOUNDING. FURTHER WEST CU
STARTING TO BUILD METRO NASHVILLE. KEPT SCT POPS PLAT AND ISO
COVERAGE WEST THIS AFTERNOON INTO THE EARLY EVENING. PULSE TYPE
STORMS WITH 0-6KM AVG STORM MOTION 5 KTS.

&&

.PREV DISCUSSION... /ISSUED 559 AM CDT THU JUN 9 2011/

AVIATION...BNA/CSV...EARLY MORNING FOG SHOULD DISSIPATE BY 13Z.
AFTERWARDS, EXPECT A WEAK SURFACE BOUNDARY TO ENTER THE MID STATE,
ALLOWING FOR ISOLATED/SCATTERED CONVECTION THIS AFTERNOON, WITH
THE BEST CHANCE OCCURRING ALONG THE CUMBERLAND PLATEAU. DESPITE
THIS, POP'S REMAIN QUITE LOW, SO WILL HANDLE FOR NOW WITH "CB"
REMARKS IN THE TAF'S. LOOK FOR WINDS TO SHIFT AROUND TO THE WEST
DURING THE AFTERNOON, GOING LIGHT/CALM BY EARLY EVENING. LIGHT
FOG AT CSV AFTER MIDNIGHT.

PREV DISCUSSION... /ISSUED 313 AM CDT THU JUN 9 2011/

SHORT TERM...THIS MORNING'S WEATHER IS PRETTY MUCH LIKE YESTERDAY
MORNING'S AND THE MORNING BEFORE THAT. WEATHER PATTERN IS PRETTY MUCH
STATUS QUO, WITH HIGH PRESSURE PREVAILING ACROSS THE SOUTHEASTERN
UNITED STATES AND PRODUCING MILD AND MUGGY CONDITIONS ACROSS THE
MID STATE.

LOOK FOR TODAY'S WEATHER TO BE A CARBON COPY OF YESTERDAY, WITH
SCATTERED AFTERNOON THUNDERSTORMS ALONG THE CUMBERLAND PLATEAU, BUT
ONLY A FEW ISOLATED THUNDERSTORMS ELSEWHERE. TEMPERATURES WILL,
ONCE AGAIN, SOAR INTO THE MID 90S OVER MOST AREAS WEST OF THE
PLATEAU. THE SAME WEATHER IS FORECAST FOR FRIDAY.

EXPECT WEATHER PATTERNS TO CHANGE OVER THE UPCOMING WEEKEND AND
EARLY NEXT WEEK, AS A LOW PRESSURE SYSTEM PUSHES NORTHEAST FROM
THE MIDWEST ACROSS THE GREAT LAKES INTO EASTERN CANADA, AND DRAGS
A COLD FRONT SOUTHWARD INTO THE TENNESSEE VALLEY. EXPECT THUNDERSTORM
COVERAGE TO INCREASE, ESPECIALLY DURING THE AFTERNOON HOURS ON SATURDAY
AND SUNDAY.

LONG TERM...BY EARLY NEXT WEEK, WE WILL HAVE A SPRAWLING SURFACE
HIGH TO OUR NORTH AND NORTHEAST, PROVIDING US WITH NORTHERLY FLOW
AND LOWER DEW POINTS AND SOMEWHAT MORE SEASONABLE TEMPERATURES.
HOWEVER, AS IS OFTEN THE CASE DURING THIS TIME OF THE YEAR, A
NORTHWESTERLY UPPER LEVEL PATTERN MAKES US VULNERABLE TO
THUNDERSTORM ACTIVITY DROPPING IN FROM THE MISSOURI-ILLINOIS-
KENTUCKY AREA. DEW POINT FRONT EXTENDS FROM NORTHEASTERN MISSOURI
TO NEAR SDF SUNDAY NIGHT AND MONDAY, WITH SCATTERED THUNDERSTORMS
EXPECTED TO DEVELOP IN THE MOISTURE CHANNEL DURING THE DAYLIGHT
HOURS, JUST TO THE SOUTH, AND THEN SPREAD SOUTHEASTWARD TOWARD OUR
FORECAST AREA.

&&

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

04

Hazardous weather outlook, Jun 9, 5:01 AM CDT, 6 hours 43 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
501 AM CDT THU JUN 9 2011

TNZ005>011-022>034-056>066-075-077>080-093>095-101030-
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-
501 AM CDT THU JUN 9 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

ROSE

In the hours before

Special weather statement, Jun 9, 11:24 AM CDT, 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1124 AM CDT THU JUN 9 2011

TNZ034-091700-
FENTRESS-
1124 AM CDT THU JUN 9 2011

...SIGNIFICANT WEATHER ADVISORY FOR FENTRESS COUNTY...

AT 1121 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 11 MILES SOUTH OF JAMESTOWN...MOVING EAST AT 20
MPH.

HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM.

31

Local storm report, Jun 9, 11:25 AM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1125 AM CDT THU JUN 09 2011

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

1120 AM     HAIL             3 S ALLARDT             36.34N 84.88W
06/09/2011  E0.75 INCH       FENTRESS           TN   TRAINED SPOTTER

&&

04

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 1:53 PM CDT	Severe Thunderstorm Warning	OHX	Smith	22 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2011 Every severe thunderstorm warning in 2011

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.