Alert archive / Tennessee / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 49, NWS Nashville, TN

May 11, 2001Macon County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 11, 2001, 2:40 PM CDT for Macon County, Tennessee. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 11, 2001, 2:40 PM CDT (19:40 UTC)
Expired: May 11, 2001, 3:15 PM CDT
In force: 35 min
Issued by: NWS Nashville, TN
Area: Whole counties

County Macon County, TN

The radar

The Nashville radar (KOHX), 59 km from the middle of the area, began a volume at 19:44 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, 7.7 hours before the alert went out and 69 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: 527 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 862 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 44 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.

000 
WUUS54 KOHX 111940
SVRBNA
TNC111-112015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
240 PM CDT FRI MAY 11 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MACON COUNTY IN TENNESSEE
  THIS INCLUDES THE CITY OF LAFAYETTE

* UNTIL 315 PM CDT

* AT 240 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER LAFAYETTE...OR ABOUT 2 MILES SOUTHWEST OF
  LAFAYETTE...MOVING EAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NEAR LAFAYETTE AT 245 PM CDT
  WEST OF RED BOILING SPRINGS AT 315 PM CDT

DAMAGING WINDS AND HAIL WITH TORRENTIAL RAINFALL ARE EXPECTED WITH
THIS STORM. TAKE COVER IN A STURDY STRUCTURE UNTIL THE STORM PASSES.

$$

07
LAT...LON 3660 8618 3642 8618 3640 8582 3662 8582

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 1:09 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	36 min
May 11, 2:31 PM CDT	Severe Thunderstorm Warning	OHX	Sumner	29 min
May 11, 4:03 PM CDT	Severe Thunderstorm Warning	OHX	Hickman	27 min
May 11, 4:41 PM CDT	Severe Thunderstorm Warning	OHX	Perry	34 min
May 11, 5:07 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Humphreys	38 min
May 11, 5:56 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner	24 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2001 Every severe thunderstorm warning in 2001

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.