Alert archive / Tennessee / Special Weather Statements in 2012

Special Weather Statement, NWS Nashville, TN

May 21, 2012Humphreys County, Tennessee

NWS Nashville, TN issued this special weather statement at May 21, 2012, 6:12 PM CDT for Humphreys County, Tennessee. It was in force for 48 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 21, 2012, 6:12 PM CDT (23:12 UTC)
Expired: May 21, 2012, 7:00 PM CDT
In force: 48 min
Issued by: NWS Nashville, TN

County Humphreys County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 11.2 hours before the alert went out and 109 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: 65 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1067 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 4 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.

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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 May 21, 3:18 PM CDT, 2 hours 54 minutes earlier.

Area forecast discussion, May 21, 3:18 PM CDT, 2 hours 54 minutes before

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Hazardous weather outlook, May 21, 3:43 PM CDT, 2 hours 29 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
343 PM CDT MON MAY 21 2012

TNZ005>011-022>034-056>066-075-077>080-093>095-222045-
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-
343 PM CDT MON MAY 21 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TONIGHT

FRONTAL SYSTEM MOVING THROUGH THE AREA TONIGHT WITH A FEW STORMS
POSSIBLY HAVING STRONG GUSTY WINDS AND SMALL HAIL. OTHERWISE...NO HAZARDOUS
WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

JLM

In the hours before

Special weather statement, May 21, 3:19 PM CDT, 2 hours 53 minutes before

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Special weather statement, May 21, 5:21 PM CDT, 51 minutes before

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Special weather statement, May 21, 5:29 PM CDT, 43 minutes before

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Special weather statement, May 21, 6:03 PM CDT, 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
603 PM CDT MON MAY 21 2012

TNZ077-212345-
COFFEE-
603 PM CDT MON MAY 21 2012

...SIGNIFICANT WEATHER ADVISORY FOR COFFEE COUNTY...

AT 558 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 7 MILES NORTHWEST OF MANCHESTER...MOVING
SOUTHEAST AT 15 MPH.

THIS STORM WILL BE NEAR...
  MANCHESTER BY 625 PM CDT.
  TULLAHOMA BY 635 PM CDT.

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

LAT...LON 3531 8600 3534 8604 3535 8609 3536 8610
      3536 8615 3533 8619 3534 8624 3540 8627
      3545 8624 3558 8624 3563 8614 3535 8588
      3529 8592

SHAMBURGER

Special weather statement, May 21, 6:12 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
612 PM CDT MON MAY 21 2012

TNZ024-220000-
HUMPHREYS-
612 PM CDT MON MAY 21 2012

...SIGNIFICANT WEATHER ADVISORY FOR HUMPHREYS COUNTY...

AT 608 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR WAVERLY...MOVING SOUTHEAST AT 15 MPH.

THIS STORM WILL BE NEAR...
  HURRICANE MILLS BY 620 PM CDT.

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

LAT...LON 3606 8798 3613 8792 3616 8792 3620 8785
      3606 8755 3597 8753 3595 8756 3595 8760
      3593 8763 3591 8770 3584 8772 3584 8787
      3588 8793 3594 8793 3594 8799 3596 8802

SHAMBURGER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 10:41 PM CDT	Special Weather Statement	OHX	Robertson	49 min
May 21, 3:19 PM CDT	Special Weather Statement	OHX	Sumner	26 min
May 21, 5:21 PM CDT	Special Weather Statement	OHX	Houston	39 min
May 21, 5:29 PM CDT	Special Weather Statement	OHX	Humphreys	46 min
May 21, 6:03 PM CDT	Special Weather Statement	OHX	Coffee	42 min
May 21, 6:16 PM CDT	Special Weather Statement	OHX	Maury	44 min

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.