1/6-1/7 Winter Storm Potential Thread

[Richardjacks]

I think we are seeing the beginning of the main event for Alabama developing back in Miss. Notice how the precip is filling in between both bands-southern and northern. This will be arriving as the 850mb level continues to chill causing snow around I20...probably heavy for an hour or two starting around 5pm. North of that zone, just a dusting, snow will extend south toward Montgomery with less amounts

 

[ShowMeYourTDs]

Trying to figure out how in the hell my temp keeps going down with a wind out of the SE. Went from 37 to 34.2 in the last 30 minutes. Even with a rain shower...(head scratching).

Has anyone seen the sounding from KATL or KPDK? Would love to see where the warm nose is at the moment.

 

[Psalm 148:8]

The big picture tells the tale...

And this means??? Translation for those like me who are unsure....

 

[VegasEagle]

I think we are seeing the beginning of the main event for Alabama developing back in Miss. Notice how the precip is filling in between both bands-southern and northern. This will be arriving as the 850mb level continues to chill causing snow around I20...probably heavy for an hour or two starting around 5pm. North of that zone, just a dusting, snow will extend south toward Montgomery with less amounts

Nice post! I agree. Just wish it would snow more in north Alabama. I have a bet riding on it.

 

[ARCC]

Trying to figure out how in the hell my temp keeps going down with a wind out of the SE. Went from 37 to 34.2 in the last 30 minutes. Even with a rain shower...(head scratching).

Has anyone seen the sounding from KATL or KPDK? Would love to see where the warm nose is at the moment.

You a probably wet bulbing as the humidity rises.

ZR continues here. Glaze is getting thicker on trees. I imagine I have a another hour or so until solar radiation decreases and it starts to build on everything.

 

[StormStalker]

No snow here, but it sure is cold. 26 degrees. Looks like West Tennessee and parts of Northwest Mississippi made out alright this morning with 2-4 inches in places.

 

[ShowMeYourTDs]

Now down to 33.8 with .03 inches of rainfall. Gonna be scary close if I can wet bulb down to 32. Current WB is at 32.18.

 

[Brent]

snow starting to accumulate in DFW, starting to notice a couple little spots here

 

[CoreyandFrosty]

Ice forming on some trees on my deck here on the NW side of Atlanta.

 

[Brax]

Trying to figure out how in the hell my temp keeps going down with a wind out of the SE. Went from 37 to 34.2 in the last 30 minutes. Even with a rain shower...(head scratching).

Has anyone seen the sounding from KATL or KPDK? Would love to see where the warm nose is at the moment.

If it's raining, you're likely experiencing evaporative cooling. Eventually, once the humidity is 100% you'll reach the limit of this ability (called the WetBulb temp.)

 

[Blountwolf]

And this means??? Translation for those like me who are unsure....

Water vapor satellite image showing surface low/trough in the western gulf, firing off waves of moisture up an over the cold air mass in place.

 

[Psalm 148:8]

Thanks! I'll take all the moisture I can get!

 

[tagat]

Spann's twitter:

 

[Psalm 148:8]

Nice slug of moisture coming out of LA and Miss.

 

[bingcrosbyb]

SREF mean up to 2.48" of snow for Birmingham. Primary window from 6pm to midnight.

 

[tagat]

Mesoscale Discussion 21

< Previous MD

Mesoscale Discussion 0021
NWS Storm Prediction Center Norman OK
0209 PM CST Fri Jan 06 2017

Areas affected...Mixed precipitation - freezing rain and sleet

Concerning...Winter mixed precipitation

Valid 062009Z - 070215Z

SUMMARY...Freezing rain and sleet will increase along a corridor
from central LA, across central MS, into central AL this
afternoon/evening. Significant icing, with rates approaching .10
inch/hr in heavier convection, is expected.

DISCUSSION...Latest vis satellite imagery exhibits deepening
convection across the lower Sabine river valley extending into
southern portions of MS. Lightning is increasing within the taller
updrafts, partly in response to increasing ascent ahead of
approaching short-wave trough. An elongated corridor of
precipitation, with embedded thunderstorms, is expected to expand in
areal coverage/intensity over the next several hours from the lower
Mississippi Valley to the central Gulf states.

With boundary-layer temperatures expected to cool a few degrees
along this corridor it appears the risk for significant icing will
increase as the afternoon progresses into the evening hours. As the
cold air deepens, sleet will become common along the nrn edge of
this expanding precip shield. With time, mixed precipitation will
spread into northern GA later this evening.

..Darrow.. 01/06/2017

 

[MikeP]

Well that sucks

 

[ARCC]

Temp now down to 31, light ZR continues.

 

[Ryan Sanders]

HHHR 19Z has a much larger area of snow accumulation for Alabama compared to 18z. But nothing exceeding 3".

 

[ShowMeYourTDs]

Down to 33.5, .05in of rain. Miserable. FFC has introduced more ZR/IP for my forecast...Combined sleet & snow accum down to 1-3, vs the bullish 3-5 earlier.