February 17-18th Winter Storm Thread.

[codgator]

Franklin heavy snow 1 in per hour rates

[Reb]

Sleet in SE Knox

[PowellVolz]

MRX latest dance...


.DISCUSSION...

Doppler radar and surface observations indicate that precip has
begun reaching the ground across the southern Plateau and
southern Valley, and we have received public reports of sleet in
Cleveland and 0.3 inches of snow in Whitwell. The potential for
snow and sleet will spread north and east through Midnight as
isentropic upglide continues to strengthen along with
strengthening warm, moist advection ahead of the approaching
shortwave. Surface temps are generally in the mid 30's to near 40,
but dew points in the 20's will lead to evaporative cooling as
the airmass saturates, which will support the wintry precip. RAP
soundings show a warm nose developing near 850 mb as WAA
increases, so snow/sleet mix will gradually change to more of a
sleet scenario then eventually all rain as the warmer air makes it
back to the surface. This will occur fairly quickly from S to N,
and the HREF precip types support this idea with much of the S
Plateau and S Valley through SW NC expected to be rain by 07Z
while the middle Valley changes to rain in the 07-09Z timeframe
and the N Plateau through the N Valley and NE TN into SW VA
changes to rain in the 09-12Z timeframe (perhaps later in SW VA).
The previous forecast and headlines look good, so the only change
was to issue an SPS for Bradley, McMinn, NW Monroe, and W Polk
Counties through 07Z to cover the current mixed precip


.

[ShawnEastTN]

Light snow almost 100% snow little sleet here and there no rain whatsoever.

Sent from my SM-G965U using Tapatalk

[Kentucky]

Just a few flurries here, but I consider that progress

[PowellVolz]

Down to 35


.

[Kentucky]

2 minutes ago, Kentucky said:

Just a few flurries here, but I consider that progress

Strike that, moderate snow now at 26 degrees

[bluegrassweather71]

1 minute ago, Kentucky said:

Just a few flurries here, but I consider that progress

Nothing here. Completely amazed. Areas over in Pulaski county are getting pasted. 

[TellicoWx]

Got a slushy mess on elevated surfaces now, sleet..35

[Kentucky]

1 minute ago, bluegrassweather71 said:

Nothing here. Completely amazed. Areas over in Pulaski county are getting pasted. 

Just started here shouldn't be much longer, really coming down now

[GeneR4]

3” of snow so far!  Backyard temp ~31, slowly rising to 32.

[Wintersnow888]

Down a couple of degrees to 27.... all snow 

[TellicoWx]

Temp starting to fall off a cliff..33.8 now..will be super close, wetbulbing around 31-32

[PowellVolz]

Temp starting to fall off a cliff..33.8 now..will be super close, wetbulbing around 31-32

I’m around 34-35 but my DP says 27-28° at several different locations around my house. Just now getting some returns over Knoxville

 

 

.

[ShawnEastTN]

I’m around 34-35 but my DP says 27-28° at several different locations around my house. Just now getting some returns over Knoxville
 
 
.

I'm surprised I'm like 100% snow temp 35.4, DP 29.6.

Sent from my SM-G965U using Tapatalk

[Shocker0]

1.5" on the car here in 45 minutes. Hopefully we stay all snow. It's been pouring 

 

[Wintersnow888]

Wow !! Dewpoint 27 ..... Amazing, I'm new to checking the dp, it really helps! It has gone up from 22 in about an hour and a half

[PowellVolz]

.

[TellicoWx]

2 minutes ago, PowellVolz said:

I’m around 34-35 but my DP says 27-28° at several different locations around my house. Just now getting some returns over Knoxville

 

 

.

My DP barely moved during the fall..should hopefully be a good sign up that way

[PowellVolz]

My DP barely moved during the fall..should hopefully be a good sign up that way

That’s what I’m hoping.


.

[Highway2Heel]

26 degrees and 1” per hour snow rates in Columbia, TN...

[TellicoWx]

Station in Coker Creek is at 32/25 (1800'), starting to fall there...so no WAA above the southern valley yet (they usually jump first here)

[dwagner88]

Temp is down to 34.7. DP, however, is up to 31.8. I think that’s it for me. I can’t wetbulb below 32 anymore. 

[Wintersnow888]

[PowellVolz]

Getting a few flakes now. No sleet


.

[Wintersnow888]

Walked out to take a shot of the road....it's all sticking

[John1122]

Heavy returns just keep training about 5 miles west of me but eastward progression just seems non-existent. 

[jaxjagman]

Starting to come down again

http://traffic.brentwoodtn.gov/201113.htm

 

[PowellVolz]

Heavy returns just keep training about 5 miles west of me but eastward progression just seems non-existent. 

Noticed this also. Was hoping for more east movement to take advantage of the column for a while.


.

[PowellVolz]

Starting to come down again
http://traffic.brentwoodtn.gov/201113.htm
 

That’s beautiful


.