Alert archive / Tennessee / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 26, NWS Nashville, TN

April 24, 2002Jackson County, Putnam County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Apr 24, 2002, 9:30 PM CDT for Jackson County, Putnam County, Tennessee. It was in force for 30 min. 5 reports 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: Apr 24, 2002, 9:30 PM CDT (02:30 UTC)
Expired: Apr 24, 2002, 10:00 PM CDT
In force: 30 min
Issued by: NWS Nashville, TN
Area: Whole counties

Counties Jackson County, TN, Putnam County, TN

The radar

The Nashville radar (KOHX), 88 km from the middle of the area, began a volume at 02:33 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
Apr 24, 9:40 PM CDT	Hail 0.75	Cookeville, TN	Spotter reported dime size hail.
Apr 24, 9:45 PM CDT	Hail 1	Algood, TN	Spotter reported quarter size hail.
Apr 24, 9:50 PM CDT	Thunderstorm Wind 60 E	Cookeville, TN	A few sheds lost their roof. TDOT reported 16-20 trees were blown down around the county had had to be cleared off county roads.
Apr 24, 9:50 PM CDT	Hail 1.75	Cookeville, TN	EMA reported golf ball size hail at downtown Cookeville.
Apr 24, 10:00 PM CDT	Thunderstorm Wind 55 E	Gainesboro, TN	Ambulance service reported a tin roof off a barn.

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 00:00Z, 2.5 hours before the alert went out and 92 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: 266 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1047 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 403 m²/s²
0-3 km storm-relative helicity: 458 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOHX 250230 CCA
SVRBNA
TNC087-141-250300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE NASHVILLE TN
930 PM CDT WED APR 24 2002

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN JACKSON COUNTY IN TENNESSEE
  PUTNAM COUNTY IN TENNESSEE

* UNTIL 1000 PM CDT

* AT 921 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES NORTHWEST OF BAXTER...OR 16 MILES WEST
  OF COOKEVILLE...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BAXTER AROUND 950 PM CDT
  6 MILES NORTHWEST OF COOKEVILLE AROUND 1000 PM CDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE 
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY 
LIGHTNING.

$$

LAT...LON 3634 8586 3616 8589 3607 8532 3632 8546

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 Apr 24, 8:45 PM CDT, 45 minutes earlier.

Area forecast discussion, Apr 24, 8:45 PM CDT, 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
845 PM CDT WED APR 24 2002

LATEST SURFACE ANALYSIS SHOWING COLD FRONT NEAR SDF-TXK LINE...
WITH PRE-FRONTAL TROF AXIS WORKING ACROSS MIDDLE TN. TROF BECOMING
MORE ACTIVE THIS EVENING WITH AIRMASS RECOVERING FROM EARLIER RAIN
AND INCREASED FORCING.

COLD FRONT EXPECTED TO CONTINUE TRACKING EWARD...WITH VERTICAL
MOTION PEAKING THRU 06Z. 00Z BNA RAOB SHOWING MOST DYNAMIC/THERMO
PARAMETERS WELL IN THE SEVERE CRITERIA RANGE. NEW MODELS HOWEVER
TRYING TO SHOW AREAS OF STRONGEST CONVECTION SPLITTING N AND S OF
THE MID-STATE. RADAR ECHOS SHOWING TREND AS WELL. CONVECTION
ACROSS W TN MOVING SOMEWHAT S...WHILE STORMS NW OF BNA CONTINUES
MORE ERLY. STORMS ACROSS W TN...MOVING SEWARD SEEMINGLY BIGGEST
THREAT REMAINDER OF THE NIGHT.

EITHER WAY...SEVERE THREAT CONTINUES. WILL NOT MAKE ANY CHANGES
AT THIS TIME. WILL NEED TO UPDATE LATER AS FRONT PASSES.

07
.BNA...NONE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 9:09 PM CDT	Severe Thunderstorm Warning	OHX	Smith	21 min
Apr 24, 9:23 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Putnam	37 min
Apr 24, 9:56 PM CDT	Severe Thunderstorm Warning	OHX	Perry	34 min
Apr 24, 9:59 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	31 min
Apr 24, 10:17 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Trousdale	43 min
Apr 24, 10:24 PM CDT	Severe Thunderstorm Warning	OHX	Wayne	36 min
Apr 24, 10:45 PM CDT	Severe Thunderstorm Warning	OHX	Jackson	45 min
Apr 24, 11:13 PM CDT	Severe Thunderstorm Warning	OHX	Putnam	47 min
Apr 24, 11:45 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	45 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.