Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

April 5, 2012Cumberland County, Tennessee

NWS Nashville, TN issued this special weather statement at Apr 5, 2012, 3:59 PM CDT for Cumberland 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: Apr 5, 2012, 3:59 PM CDT (20:59 UTC)
Expired: Apr 5, 2012, 4:30 PM CDT
In force: 31 min
Issued by: NWS Nashville, TN

County Cumberland County, TN

The radar

The Nashville radar (KOHX), 139 km from the middle of the area, began a volume at 21:02 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, 9.0 hours before the alert went out and 141 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: 670 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 805 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

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 Apr 5, 2:51 PM CDT, 1 hour 8 minutes earlier.

Area forecast discussion, Apr 5, 2:51 PM CDT, 1 hour 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
251 PM CDT THU APR 5 2012

.DISCUSSION...
SEVERE THUNDERSTORM WATCH FOR ALL OF MIDDLE TENNESSEE UNTIL 9 PM
CDT.

COLD CORE UPPER LOW WILL WORK SLOWLY EASTWARD THIS AFTERNOON AND
EVENING INCREASING THE HAIL THREAT ACROSS MY CWA. ALSO...A BOUNDARY
EXTENDS WEST TO EAST ACROSS NORTHERN MIDDLE TENNESSSE. THIS BOUNDARY
WILL ACT TO FOCUS THE STRONGER STORMS AND PRODUCE HEAVIER RAINFALL
ALONG ITS CORRIDOR.

COLD CORE SHIFTS EAST OF MID STATE AFTER MIDNIGHT TONIGHT TAKING
SHOWERS AND STORMS WITH IT. A CANADIAN HIGH WILL BUILD INTO THE
TENNESSEE VALLEY ON FRIDAY BRINGING TEMPERATURES MORE IN LINE WITH
SEASONAL NORMALS FOR THIS TIME OF THE YEAR. TEMPS FRIDAY NIGHT
WILL DIP INTO THE LOWER 40S MANY AREAS WITH UPPER 30S ALONG THE
PLATEAU. MAV FORECAST DEWPOINT TEMPS IN THE MIDDLE 30S FRIDAY
NIGHT ALONG THE PLATEAU. WITH DEWPOINTS ABOVE FREEZING THIS WOULD
PRECLUDE FROST DEVELOPMENT BUT WILL TAKE A CLOSER LOOK AT IT
TOMORROW...WINDS WILL BE CALM FRIDAY NIGHT AND SKIES CLEAR.

THIS WEEKEND LOOKS REALLY NICE WITH HIGHS IN THE LOWER 70S ON
SATURDAY AND EASTER SUNDAY.

NEXT WEEK WE WILL SE A PATTERN CHANGE TO A TROUGH IN THE EAST AND RIDGE
IN THE WEST. THIS WILL MEAN BELOW NORMAL TEMPS MIDDLE OF NEXT WEEK.

BOYD

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      46  66  42  72 /  70   0   0   0
CLARKSVILLE    42  65  40  71 /  70   0   0   0
CROSSVILLE     42  64  38  69 /  70  05   0   0
COLUMBIA       46  67  43  73 /  70   0   0   0
LAWRENCEBURG   46  68  41  73 /  70  05   0   0
WAVERLY        44  65  41  73 /  70   0   0   0

&&

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

BOYD

Hazardous weather outlook, Apr 5, 4:08 AM CDT, 11 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
408 AM CDT THU APR 5 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-061030-
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-
408 AM CDT THU APR 5 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR ALL OF MIDDLE
TENNESSEE TODAY AND EARLY TONIGHT. A COLD FRONT AND AN UPPER LOW
CROSSING THE REGION WILL SET OFF NUMEROUS THUNDERSTORMS. ISOLATED
STORMS MAY PRODUCE LARGE HAIL...AND POSSIBLY DAMAGING WIND...
ESPECIALLY IN THE AFTERNOON.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER CALL TO ACTION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS MAY BE NEEDED.

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

07

In the hours before

Special weather statement, Apr 5, 3:15 PM CDT, 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
315 PM CDT THU APR 5 2012

TNZ023>025-057-052100-
DICKSON-HICKMAN-HOUSTON-HUMPHREYS-
315 PM CDT THU APR 5 2012

...SIGNIFICANT WEATHER ADVISORY FOR DICKSON...HICKMAN...HOUSTON AND
HUMPHREYS COUNTIES...

AT 311 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR MCEWEN...OR 9 MILES EAST OF WAVERLY...MOVING
NORTH AT 10 MPH.

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

LAT...LON 3630 8778 3634 8752 3608 8733 3586 8728
      3592 8769

TB12

Special weather statement, Apr 5, 3:17 PM CDT, 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
317 PM CDT THU APR 5 2012

TNZ027-059-062-052100-
DAVIDSON-RUTHERFORD-WILLIAMSON-
317 PM CDT THU APR 5 2012

...SIGNIFICANT WEATHER ADVISORY FOR DAVIDSON...RUTHERFORD AND
WILLIAMSON COUNTIES...

AT 316 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CLUSTER OF STRONG THUNDERSTORMS FROM FAIRVIEW TO FRANKLIN TO
MURFREESBORO...MOVING NORTH AT 5 MPH.

PEOPLE IN RUTHERFORD...SOUTHERN DAVIDSON AND WILLIAMSON COUNTIES...
INCLUDING THE CITIES OF FRANKLIN AND BRENTWOOD...SHOULD MONITOR THE
WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE
PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

NICKEL SIZE HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3611 8656 3595 8629 3568 8631 3572 8671
      3570 8678 3576 8692 3578 8693 3578 8700
      3585 8715 3615 8697

SHAMBURGER

Local storm report, Apr 5, 3:22 PM CDT, 37 minutes before

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Local storm report, Apr 5, 3:50 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
350 PM CDT THU APR 05 2012

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

0347 PM     HAIL             MURFREESBORO            35.85N 86.39W
04/05/2012  M0.88 INCH       RUTHERFORD         TN   EMERGENCY MNGR

&&

BBOYD

Special weather statement, Apr 5, 3:53 PM CDT, 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
353 PM CDT THU APR 5 2012

TNZ027-028-059-062-063-052145-
CANNON-DAVIDSON-RUTHERFORD-WILLIAMSON-WILSON-
353 PM CDT THU APR 5 2012

...SIGNIFICANT WEATHER ADVISORY FOR CANNON...DAVIDSON...RUTHERFORD...
WILLIAMSON AND WILSON COUNTIES...

AT 348 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CLUSTER OF STRONG THUNDERSTORMS NEAR NOLENSVILLE...OR 11 MILES EAST
OF FRANKLIN...MOVING NORTH AT 5 MPH.

NICKEL SIZE HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THESE
STORMS.

LAT...LON 3618 8611 3597 8603 3567 8600 3582 8714
      3583 8715 3604 8706 3605 8704 3610 8703
      3613 8700 3622 8698

TB12

Special weather statement, Apr 5, 3:59 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
359 PM CDT THU APR 5 2012

TNZ032>034-066-052130-
CUMBERLAND-FENTRESS-OVERTON-PUTNAM-
359 PM CDT THU APR 5 2012

...SIGNIFICANT WEATHER ADVISORY FOR CUMBERLAND...FENTRESS...OVERTON
AND PUTNAM COUNTIES...

AT 353 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 7 MILES NORTHWEST OF CROSSVILLE...MOVING NORTH AT
5 MPH.

SMALL HAIL IS EXPECTED WITH THIS STORM. PLEASE REPORT HAIL SIZES TO
THE NATIONAL WEATHER SERVICE.

LAT...LON 3623 8489 3621 8491 3618 8490 3614 8489
      3591 8499 3598 8529 3599 8529 3630 8517

TB12

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 12:48 PM CDT	Special Weather Statement	OHX	Stewart	42 min
Apr 5, 1:05 PM CDT	Special Weather Statement	OHX	Cheatham, Dickson	40 min
Apr 5, 1:13 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Williamson	29 min
Apr 5, 1:24 PM CDT	Special Weather Statement	OHX	Giles, Marshall, Maury	66 min
Apr 5, 1:37 PM CDT	Severe Thunderstorm Warning	OHX	Stewart	18 min
Apr 5, 1:53 PM CDT	Special Weather Statement	OHX	Cheatham, Dickson, Houston, Stewart	67 min
Apr 5, 2:02 PM CDT	Severe Thunderstorm Warning	OHX	Benton	28 min
Apr 5, 2:14 PM CDT	Special Weather Statement	OHX	Rutherford	61 min
Apr 5, 2:23 PM CDT	Special Weather Statement	OHX	Houston	37 min
Apr 5, 2:28 PM CDT	Special Weather Statement	OHX	Williamson	47 min
Apr 5, 2:32 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Davidson, Marshall, Rutherford, Williamson	28 min
Apr 5, 2:36 PM CDT	Severe Thunderstorm Warning	OHX	Houston, Humphreys, Stewart	39 min
Apr 5, 2:48 PM CDT	Special Weather Statement	OHX	Hickman	42 min
Apr 5, 3:07 PM CDT	Special Weather Statement	OHX	Montgomery	23 min
Apr 5, 3:15 PM CDT	Special Weather Statement	OHX	Houston	45 min
Apr 5, 3:17 PM CDT	Special Weather Statement	OHX	Rutherford, Williamson	43 min
Apr 5, 3:24 PM CDT	Areal Flood Advisory	OHX	Williamson	3 hr
Apr 5, 3:53 PM CDT	Special Weather Statement	OHX	Cannon, Davidson, Rutherford, Williamson, Wilson	52 min
Apr 5, 4:29 PM CDT	Special Weather Statement	OHX	Cumberland	31 min
Apr 5, 5:00 PM CDT	Special Weather Statement	OHX	Cumberland
Apr 5, 5:02 PM CDT	Areal Flood Advisory	OHX	Cumberland	3 hr
Apr 5, 5:05 PM CDT	Special Weather Statement	OHX	Cumberland	25 min
Apr 5, 5:18 PM CDT	Areal Flood Advisory	OHX	Davidson	3 hr

Nearby

Special Weather Statements in Tennessee, 2012 Every special weather statement in 2012

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.