Alert archive / Tennessee / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 109, NWS Nashville, TN

May 13, 2002Williamson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 13, 2002, 10:19 AM CDT for Williamson County, Tennessee. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 13, 2002, 10:19 AM CDT (15:19 UTC)
Expired: May 13, 2002, 11:00 AM CDT
In force: 41 min
Issued by: NWS Nashville, TN
Area: Whole counties

County Williamson County, TN

The radar

The Nashville radar (KOHX), 50 km from the middle of the area, began a volume at 15:19 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
May 13, 10:28 AM CDT	Thunderstorm Wind 50 E	Leipers Fork, TN	Spotters reported trees blow down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 3.3 hours before the alert went out and 38 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 618 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: -78 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 131519
SVRBNA
TNC187-131600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
1019 AM CDT MON MAY 13 2002

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WILLIAMSON COUNTY IN TENNESSEE

* UNTIL 1100 AM CDT

* AT 1014 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM FAIRVIEW TO 10 MILES SOUTH OF
  FAIRVIEW...MOVING SOUTHEAST AT 25 MPH.

* SEVERE THUNDERSTORMS WILL BE...NEAR
  FRANKLIN AROUND 1050 AM CDT

SEVERE THUNDERSTORM WINDS CAN BE AS DESTRUCTIVE AS A TORNADO. FOR
YOUR SAFETY, GO TO A SAFE PLACE IMMEDIATELY.

$$
21

LAT...LON 3603 8712 3588 8718 3577 8673 3593 8665

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 May 13, 10:00 AM CDT, 19 minutes earlier.

Area forecast discussion, May 13, 10:00 AM CDT, 19 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1000 AM CDT MON MAY 13 2002

RADAR SHOWING LINE OF SHRA ASSOCIATED W/ FRONT MOVING TOWARD BNA.
WINDS STRONG W/ THIS LINE W/ TREES DOWN ACROSS MONTGOMERY
COUNTY...GUST TO 41 KTS @ M02.  LINE SHOULD REACH BNA BY 1030 AM.

WILL LET WATCH EXPIRE AND WILL UPDATE TO SHOW RECENT TRENDS.

.BNA...NONE.

MAG

In the hours before

Special weather statement, May 13, 5:30 AM CDT, 4 hours 49 minutes before

TNZ005>011-022>034-056>066-075>080-093>097-141030-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
530 AM CDT MON MAY 13 2002

A STRONG COLD FRONT WILL MOVE ACROSS THE AREA TODAY BRINGING WITH
IT WIDESPREAD SHOWERS AND THUNDERSTORMS. SOME THUNDERSTORMS MAY
REACH SEVERE LIMITS THROUGH MIDDAY...PRODUCING MAINLY DAMAGING
WINDS. VERY HEAVY RAINFALL IS ALSO OF CONCERN...WITH ONE TO THREE
INCHES POSSIBLE AT MOST LOCATIONS.

WEATHER CONDITIONS WILL IMPROVE THIS AFTERNOON...AS THE COLD
FRONT PUSHES EAST OF THE AREA. SKIES ARE EXPECTED TO CLEAR TONIGHT.

THE THREAT OF SEVERE WEATHER LOOKS SIGNIFICANT...THUS ACTIVATION
OF EMERGENCY PERSONNEL AND SPOTTER NETWORKS MAY BE NECESSARY INTO
THE EARLY AFTERNOON.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 4:21 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Wilson	24 min
May 13, 4:35 AM CDT	Severe Thunderstorm Warning	OHX	Trousdale	25 min
May 13, 4:44 AM CDT	Severe Thunderstorm Warning	OHX	Dickson, Hickman	46 min
May 13, 4:53 AM CDT	Severe Thunderstorm Warning	OHX	Jackson, Putnam, Smith	52 min
May 13, 5:16 AM CDT	Severe Thunderstorm Warning	OHX	Clay, Overton, Pickett	44 min
May 13, 5:46 AM CDT	Severe Thunderstorm Warning	OHX	Fentress, Pickett	29 min
May 13, 5:57 AM CDT	Flash Flood Warning	OHX	Cheatham, Davidson, Dickson, Hickman, Humphreys, Rutherford and 5 more	3 hr
May 13, 6:04 AM CDT	Severe Thunderstorm Warning	OHX	Cannon	41 min
May 13, 10:01 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Robertson	29 min
May 13, 10:08 AM CDT	Severe Thunderstorm Warning	OHX	Davidson	27 min
May 13, 10:37 AM CDT	Severe Thunderstorm Warning	OHX	Davidson, Sumner	28 min
May 13, 10:45 AM CDT	Severe Thunderstorm Warning	OHX	Wilson	45 min
May 13, 11:09 AM CDT	Severe Thunderstorm Warning	OHX	Franklin	51 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.