Alert archive / Tennessee / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 58, NWS Nashville, TN

May 27, 2018Montgomery County, Robertson County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 27, 2018, 4:21 PM CDT for Montgomery County, Robertson County, Tennessee. It was in force for 24 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 27, 2018, 4:21 PM CDT (21:21 UTC)
Expired
May 27, 2018, 4:45 PM CDT
In force
24 min
Issued by
NWS Nashville, TN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Montgomery County, TN, Robertson County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.4 hours before the alert went out and 63 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 12:00Z on 2018-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 547 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 12:00Z on 2018-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 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
547 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
908 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 26, 6:24 PM CDT, 21 hours 57 minutes earlier.

Area forecast discussion, May 26, 6:24 PM CDT, 21 hours 57 minutes before
Area Forecast Discussion
National Weather Service Nashville TN
624 PM CDT Sat May 26 2018

.UPDATE...
FOR 00Z AVIATION DISCUSSION.

&&

.DISCUSSION...

Scattered thunderstorms popped up once again today and by this
evening are expected to be confined mainly to southern and eastern
parts of the Mid-State, before undergoing the typical diurnal
dissipation.

Scattered showers and thunderstorms will develop yet again on
Sunday, especially over southern and eastern areas, with very
similar conditions on Monday. It still looks like a band of
subsidence, on the outer fringes of subtropical storm Alberto,
will likely work its way northward into our area Sunday night into
Monday night, as Alberto's center approaches the Gulf Coast, and
should help keep convection limited to the scattered variety for
our neck of the woods. However, expect showers to become numerous
on Tuesday, as Alberto's main moisture field finally starts to
push into the Tennessee Valley. A few thunderstorms will also be
possible on Tuesday. Showers and isolated thunderstorms continue
through Tuesday night and into Wednesday morning, but then should
diminish from the southwest, as the remnants of Alberto pull north
and east of Middle Tennessee.

Even though Alberto will be nothing more than a memory by late
week, our atmosphere will remain infected by sufficient moisture
to keep scattered showers and thunderstorms running each day.
There should be more sunshine, however, by late week, which will
allow highs to push back into the middle 80s to around 90 degrees
by next Friday and Saturday.

The bulk of our rains this upcoming week are expected to occur on
Tuesday and Wednesday, with the western two-thirds of Middle
Tennessee forecast to see between one and two inches of rain, with
locally higher amounts to around 3 inches possible. This will be
in areas just east of Alberto's circulation center, that is
forecast to track northward, very close to the Tennessee River,
Tuesday night and Wednesday morning. An additional inch or so of
rain could fall Thursday and Friday, meaning that some folks could
see upwards of 4 inches during that four-day period. Localized
flooding could become a problem at some point during that four-day
period, and an ESF may be issued at some point over the next day
or so.

&&

.AVIATION...
00Z TAF DISCUSSION.

Radar trends show CKV, BNA, and MQY are VFR, while CSV could see
a possible shower or thunderstorm over the next few hours. All
sites recorded some precipitation this afternoon so have MVFR VIS
reduction late tonight into early tomorrow. BNA and MQT will need
to be monitored for possible IFR VIS late as they saw the more
significant rainfall. After 14Z expect VFR conditions with SCT
dirunal CU and lesser chances for convection than today.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

DISCUSSION......19
AVIATION........05

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 7:16 PM CDTSpecial Weather StatementOHXOverton, Pickett44 min
May 26, 7:44 PM CDTAreal Flood AdvisoryOHXOverton2 hr
May 27, 4:30 PM CDTSpecial Weather StatementOHXStewart30 min
May 27, 5:19 PM CDTSpecial Weather StatementOHXWilson26 min
May 27, 6:01 PM CDTAreal Flood AdvisoryOHXSumner119 min
May 27, 6:52 PM CDTAreal Flood AdvisoryOHXWilson113 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2018Every severe thunderstorm warning in 2018

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.