Alert archive / Tennessee / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 3, NWS Nashville, TN

January 8, 1999Davidson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jan 8, 1999, 8:56 PM CST for Davidson County, Tennessee. It was in force for 34 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
Jan 8, 1999, 8:56 PM CST (02:56 UTC)
Expired
Jan 8, 1999, 9:30 PM CST
In force
34 min
Issued by
NWS Nashville, TN
Area
Whole counties

County Davidson County, TN

The radar

The Nashville radar (KOHX), 21 km from the middle of the area, began a volume at 03:00 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 00:00Z, 2.9 hours before the alert went out and 17 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-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 1999-01-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 1999-01-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 467 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
17 J/kg
Mixed-layer CIN
-195 J/kg
Mixed-layer LCL
516 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
467 m²/s²
0-3 km storm-relative helicity
522 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jan 8, 7:42 PM CST, 1 hour 14 minutes earlier.

Area forecast discussion, Jan 8, 7:42 PM CST, 1 hour 14 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
742 PM CST FRI JAN 8 1999

CONVECTION AHEAD OF FRONT PRESENTLY MOVING INTO CENTRAL PORTIONS OF
CWA WITH STORMS APPROACHING SVR IN DICKSON/HUMPHREYS COUNTIES.
WITH KBNA 88D DOWN SINCE 01Z, OTHER REGIONAL RADARS PROVIDING
AREAL COVERAGE. SFC FRONTAL POSITION AT 01Z FROM SPRINGFIELD TO
PARSONS TO JACKSON LINE. WITH ALL THIS IN MIND...WOULD RECOMMEND
CONTINUATION OF WORDING IN PREVIOUS ZFPTN ISSUANCE FOR FIRST PD.
HOWEVER...WILL MONITOR CONDITIONS CLOSELY OVER REGION AS EXPECTED
WINTERY WX SITUATION DEVELOPS AROUND 06Z.

14
JBW

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 8, 7:04 PM CSTSevere Thunderstorm WarningOHXDickson, Humphreys51 min
Jan 8, 8:07 PM CSTSevere Thunderstorm WarningOHXDavidson48 min
Jan 8, 9:15 PM CSTSevere Thunderstorm WarningOHXWilson35 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1999Every severe thunderstorm warning in 1999

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.