Alert archive / Tennessee / Frost Advisories in 2021

Frost Advisory 2, NWS Nashville, TN

April 15, 2021Cumberland County, Fentress County, Pickett County, Tennessee

NWS Nashville, TN issued this frost advisory at Apr 15, 2021, 6:52 PM CDT for Cumberland County, Fentress County, Pickett County, Tennessee. It took effect at Apr 16, 2021, 3:00 AM CDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Apr 15, 2021, 6:52 PM CDT (23:52 UTC)
In effect from
Apr 16, 2021, 3:00 AM CDT
Expired
Apr 16, 2021, 8:00 AM CDT
In force
5 hr
Issued by
NWS Nashville, TN

Counties Cumberland County, TN, Fentress County, TN, Pickett County, TN

The radar

The Nashville radar (KOHX), 140 km from the middle of the area, began a volume at 23:54 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, 11.9 hours before the alert went out and 145 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 2021-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2021-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1499 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

359 
WWUS74 KOHX 152352
NPWOHX

URGENT - WEATHER MESSAGE
National Weather Service Nashville TN
652 PM CDT Thu Apr 15 2021

TNZ011-034-066-161300-
/O.NEW.KOHX.FR.Y.0002.210416T0800Z-210416T1300Z/
Pickett-Fentress-Cumberland-
Including the cities of Byrdstown, Jamestown, Allardt, 
and Crossville
652 PM CDT Thu Apr 15 2021

...FROST ADVISORY IN EFFECT EARLY FRIDAY MORNING...

* WHAT...Temperatures as low as 34 will result in widespread 
  frost.

* WHERE...Pickett, Fentress and Cumberland Counties.

* WHEN...From 3 AM to 8 AM CDT Friday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if left
  uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

Shamburger

Nearby

Frost Advisories in Tennessee, 2021Every frost advisory in 2021

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.