Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 17, NWS Nashville, TN

February 1, 2012Maury County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Feb 1, 2012, 7:24 PM CST for Maury County, Tennessee. It was in force for 36 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 1, 2012, 7:24 PM CST (01:24 UTC)
Expired: Feb 1, 2012, 8:00 PM CST
In force: 36 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Maury County, TN

The radar

The Nashville radar (KOHX), 94 km from the middle of the area, began a volume at 01:27 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.

What was reported inside it

Time	Report	Where	Remark
Feb 1, 7:25 PM CST	HAIL 0.88	3 Sw Mount Pleasant, TN	TRAINED SPOTTER REPORTED NICKEL SIZED HAIL COVERING THE GROUND ON HWY 43S NEAR LAWRENCE COUNTY LINE
Feb 1, 7:39 PM CST	HAIL 0.88	5 Se Columbia, TN	PUBLIC REPORT OF NICKEL SIZED HAIL NEAR COLUMBIA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 1.4 hours before the alert went out and 82 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: 297 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 623 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

051 
WUUS54 KOHX 020124
SVROHX
TNC119-020200-
/O.NEW.KOHX.SV.W.0017.120202T0124Z-120202T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
724 PM CST WED FEB 1 2012

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MAURY COUNTY IN MIDDLE TENNESSEE...

* UNTIL 800 PM CST

* AT 718 PM CST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS NEAR MOUNT
  PLEASANT...MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MOUNT PLEASANT...
  COLUMBIA...

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 3544 8730 3550 8727 3554 8729 3555 8732
      3557 8732 3573 8692 3557 8684 3553 8685
      3551 8687 3552 8688 3551 8688 3544 8710
      3546 8712 3543 8719
TIME...MOT...LOC 0123Z 247DEG 27KT 3551 8722

$$

SHAMBURGER

1 follow-up statement

207 
WWUS54 KOHX 020138
SVSOHX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
738 PM CST WED FEB 1 2012

TNC119-020200-
/O.CON.KOHX.SV.W.0017.000000T0000Z-120202T0200Z/
MAURY TN-
738 PM CST WED FEB 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MAURY COUNTY
UNTIL 800 PM CST...

AT 736 PM CST...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN 
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MOUNT PLEASANT...OR 8 
MILES SOUTHWEST OF COLUMBIA...MOVING NORTHEAST AT 30 MPH.

AT 725 PM CST...NICKEL SIZE HAIL WAS REPORTED COVERING THE GROUND 
NEAR MOUNT PLEASANT WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  COLUMBIA.

LAT...LON 3546 8712 3545 8715 3560 8725 3573 8692
      3557 8684 3553 8685 3551 8687 3552 8687
      3551 8688 3544 8710
TIME...MOT...LOC 0136Z 247DEG 27KT 3554 8710

$$

SHAMBURGER

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 Feb 1, 7:14 PM CST, 10 minutes earlier.

Area forecast discussion, Feb 1, 7:14 PM CST, 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
714 PM CST WED FEB 1 2012

.MESOSCALE UPDATE...
00Z KBNA RAOB SHOWS WEAK S/B VEERING WITH LITTLE SHEAR. NOT EXPECTING
ANY SVR STORMS NORTH OF I-40. FURTHER SOUTH...ATM IS MORE UNSTABLE
WITH ISO HAILERS/WIND DAMAGE EVENTS POSSIBLE THROUGH MID EVENING.
NO WATCH ANTICIPATED.

&&

.PREV DISCUSSION... /ISSUED 536 PM CST WED FEB 1 2012/

UPDATE...

00Z TAF DISCUSSION.

AVIATION...

ISOLATED -TSRA CONTINUE MOVING SOUTHEAST ACROSS NORTHERN PORTIONS
OF THE MID STATE. DIFFICULT TO PINPOINT WHETHER BNA/CSV WILL BE
DIRECTLY IMPACTED...BUT WILL CONTINUE VCSH/VCTS AT BNA AND TEMPO
GROUPS FOR PRECIP AT BOTH AIRPORTS LATER THIS EVENING AND TONIGHT.
MAIN ISSUE WILL BE POTENTIAL FOG LATE TONIGHT...AS ATMOSPHERE
CLEARS OUT BEHIND PRECIP. FORECAST SOUNDINGS INDICATE PLENTIFUL
LOW LEVEL MOISTURE TRAPPED BENEATH NEAR SURFACE TEMPERATURE
INVERSION. LOWER CONFIDENCE ON IFR VIS AT BNA...BUT LOOKS MORE
CERTAIN AT CSV FOR EVEN LIFR VIS. IMPROVEMENT TO VFR AT BOTH
AIRPORTS TOMORROW MORNING. LIGHT SOUTH WINDS THIS EVENING WILL
VEER TO SOUTHWEST AHEAD OF A WEAK COLD FRONT TONIGHT BEFORE
BECOMING NORTHWEST BY THURSDAY MORNING.

PREV DISCUSSION... /ISSUED 302 PM CST WED FEB 1 2012/

DISCUSSION...SURFACE MAP AT 20Z SHOWS COLD FRONT BETWEEN PAH AND
CKV, WITH UNSEASONABLY WARM TEMPS PILING UP JUST AHEAD OF THE
FRONT. VERY LITTLE PRECIP OCCURRING AROUND MIDDLE TENNESSEE AT THE
MOMENT, WITH EARLIER RAIN LINGERING ON THE PLATEAU, AND CONVECTIVE
CELLS STARTING TO FORM ALONG THE COLD FRONT. SPC IS HOLDING THE
REGION IN A GENERAL TS AREA TODAY/TONIGHT, SO AM GOING ABOVE
GUIDANCE AND INCLUDING SCATTERED SHOWERS WITH ISOLATED STORMS
DURING THE EVENING, THEN AREAS OF FOG AFTER MIDNIGHT GIVEN THE
PROSPECT OF RADIATIONAL COOLING. EXPECT A PLEASANT THURSDAY WITH
CONTINUED WARM TEMPS, THEN THE NEXT SYSTEM MAKES A QUICK
APPEARANCE FRIDAY AFTERNOON AND EVENING AS A STRONG FRONTAL
SYSTEM TRACKS EASTWARD FROM THE PLAINS. BEST CHANCE OF ACTIVE WX
WILL BE FRIDAY NIGHT AND SATURDAY, WITH A LINGERING CHANCE OF
SHOWERS INTO SATURDAY NIGHT AND PERHAPS EVEN SUNDAY. GFS IS THE
QUICKER MODEL WITH RESPECT TO THE WEEKEND FORECAST, WITH EUROPEAN
MODEL MOVING THE MOISTURE OUT MUCH MORE SLOWLY. AT ANY RATE, TEMPS
WILL FINALLY COOL OFF SOMEWHAT FOLLOWING THE WEEKEND FRONTAL
PASSAGE.

&&

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

04

Hazardous weather outlook, Feb 1, 5:00 AM CST, 14 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
500 AM CST WED FEB 1 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-021100-
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-
500 AM CST WED FEB 1 2012

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...THURSDAY THROUGH TUESDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

31

In the hours before

Special weather statement, Feb 1, 5:42 PM CST, 1 hour 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
542 PM CST WED FEB 1 2012

TNZ007-008-020015-
ROBERTSON-SUMNER-
542 PM CST WED FEB 1 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEAST ROBERTSON AND SUMNER
COUNTIES...

AT 538 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR CROSS PLAINS...OR 14 MILES EAST OF
SPRINGFIELD...MOVING EAST AT 25 MPH.

THIS STORM WILL BE NEAR...
  PORTLAND BY 550 PM CST.
  WESTMORELAND BY 610 PM CST.

HALF INCH SIZE HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3664 8657 3665 8655 3659 8622 3653 8622
      3645 8625 3645 8627 3640 8627 3636 8628
      3635 8630 3651 8676 3666 8669 3666 8660

SHAMBURGER

Special weather statement, Feb 1, 6:25 PM CST, 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
625 PM CST WED FEB 1 2012

TNZ093-094-020100-
LAWRENCE-WAYNE-
625 PM CST WED FEB 1 2012

...SIGNIFICANT WEATHER ADVISORY FOR WAYNE AND LAWRENCE COUNTIES...

AT 620 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CLUSTER OF STRONG THUNDERSTORMS FROM 6 MILES SOUTHEAST OF OLIVE HILL
TO WAYNESBORO...MOVING EAST AT 20 MPH.

THESE STORMS WILL BE NEAR...
  COLLINWOOD BY 700 PM CST.

HALF INCH SIZE HAIL...AND WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE
STORMS.

LAT...LON 3510 8799 3531 8798 3539 8779 3540 8757
      3540 8752 3541 8751 3541 8739 3505 8738
      3506 8760

SHAMBURGER

Special weather statement, Feb 1, 6:41 PM CST, 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
641 PM CST WED FEB 1 2012

TNZ026>028-059-062-020145-
CHEATHAM-DAVIDSON-RUTHERFORD-WILLIAMSON-WILSON-
641 PM CST WED FEB 1 2012

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

AT 639 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR BELLE MEADE...OR 10 MILES SOUTHWEST OF
NASHVILLE...MOVING EAST AT 25 MPH.

THIS STORM WILL BE NEAR...
  BELLE MEADE BY 650 PM CST.
  FOREST HILLS BY 655 PM CST.
  OAK HILL BY 700 PM CST.
  LA VERGNE BY 735 PM CST.
  RURAL HILL BY 740 PM CST.
  5 MILES NORTH OF SMYRNA BY 745 PM CST.

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

LAT...LON 3619 8643 3585 8645 3599 8704 3617 8702

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 1, 6:25 PM CST	Special Weather Statement	OHX	Lawrence, Wayne	35 min
Feb 1, 6:32 PM CST	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	28 min
Feb 1, 6:41 PM CST	Special Weather Statement	OHX	Davidson	64 min
Feb 1, 6:59 PM CST	Severe Thunderstorm Warning	OHX	Lawrence, Lewis, Maury	31 min
Feb 1, 7:39 PM CST	Special Weather Statement	OHX	Davidson, Rutherford, Williamson, Wilson	66 min
Feb 1, 7:59 PM CST	Special Weather Statement	OHX	Marshall	31 min
Feb 1, 8:03 PM CST	Special Weather Statement	OHX	Giles	57 min
Feb 1, 8:52 PM CST	Special Weather Statement	OHX	Montgomery	23 min
Feb 1, 9:53 PM CST	Special Weather Statement	OHX	Van Buren	52 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.