Morning update...

I actually got a good nights sleep, which is a nice change for me  when a storm approaches. I'm sure you all have seen some of the crazy outputs from the Euro, which 2 runs in a row CLOCKED us. One run had over 30 inches and one had 25 inches. Other model runs have had good snows 6-12 inches, but they mix with sleet/rain for a while.

Cracking the code on these to me comes  from understanding the physical evolution of the storm. I think I have a decent grasp on that now. The american model which has a decent snow for us 6-10 inches, but a ton of mixing. I believe this is because of the warmer look of the model, which doesn't force it to transfer to the coastal low fast enough. I think that's wrong because the short term models are just getting a view of this thing in the 70-84 hour range and they are colder. This cold air is what forces that low to redevelop quickly.

We end up with 2 waves of snow. Wave one is overnight Thursday into Friday morning. 1-3, maybe 2-4 inches falls. As it ends, we mix with some sleet. Danville and southside had more sleet, less accumulations and maybe even some rain. The lull could be as long as 4-5 hours from late morning to mid afternoon.

Coastal takes over pretty quickly and a HUGE wave comes through.. THIS is where we get the big accumulations. This snow could last until Saturday morning, with it being a 30 hour event.

Here is a SIM radar at hour 84... it's from the NAM..

Note how there is one area to our northeast and we are in a relative minimum area. At this time, 1PM Friday some light snow, sleet and freezing rain is falling. You also see that HUGE area to our southwest moving in. We've basically had a burst of warm air advection snow/sleet and coastal jump is happening now. 

That map shows a broad area of low pressure from Eastern TN down into FL.. this is what the euro shows but you're not allowed to post the pay maps I get. In the next map on the euro, there is a nice consolidated area of low pressure near Myrtle beach and heavy snow has moved back in to our region. Places that have mixed all along like Danville have changed to heavy snow.

I'm not going full Euro and predicting 24-30 inches, but I think we do very well. Even the warmer/slower transfer GFS has us getting 6-12 inches with a mix for an extended period.  All areas will see some what of a mix late morning, mid day Friday but the big show is when the coastal cranks up Friday afternoon and evening.

Let's revist floors and ceilings...

The Floor for Roanoke/Blacksburg and Lynchburg has been moved to 5 inches. I'd be shocked if we saw less than 5 inches. The ceiling 20 or more. Most likely, playing it safe is in the 10-15 inch range. Please remember that I always start low on snow totals and then go bigger. If A forecast is for 1-2 feet, and you get 12 inches, people feel let down.  So, we start small and then massage totals as needed as more information is available.

Danville/Southside. The floor is 3 inches.  I worry that Bug Island, South Hill could check in just under that total but we can adapt as we get closer. The ceiling is a foot or more. Most likely totals in the 6-12 inch range, highest Danville West to Martinsville, lower South Boston to South Hill. Again, subject to change.

Will tweet and fb updates as model runs come in. Please share with your friends. 

You Get Nothing!

How I feel waiting for the next round of models... Euro trended colder as I suspected and had a CRAZY output where everything went perfect and it "modeled" 30 inches of snow. DT from Wxrisk posted the map. I still have concerns over the amount of mixing that takes places. Would be the difference between 3 to 6 with sleet and rain or 8-12 or more. Will do full synoptic update later this evening or early tomorrow.

The BIG storm: What we know..... and what we don't know??

Social Media has been blowing up all day about the POSSIBLE big storm. Let's break down the details with What we know...and what we don't know??


What we know!

1. Cold Monday and Tuesday where temps don't get above Freezing most areas.
2. We will have a storm Thursday into Saturday Time Frame.
3. I expect Lynchburg, Danville, Roanoke and Blacksburg to have at least an inch of liquid fall (Could be snow, ice, rain)
4. Starting time could be as early as 9pm Thursday evening far western regions and as late as 9am Friday far eastern regions.

What we don't know??

1. Snow amounts. Social media will be flooded with maps from XYZ run of whatever model. There are so many issues with them I don't know where to start. 5 days out, we don't know yet. Remember, now we look broad and get specific as the event gets closer.
2. Exact storm track.. This is HUGE and ties into number one. Remember we want to be on the cold side of the low. This means the north and west side.. the model runs that take the low into Kentucky are NOT great for our region. My guess is a somewhere into Georgia, reforming near Myrtle Beach, but that's an educated guess. If a primary low drives UP into Kentucky, we are icy and rainy.
3, Exactly how much cold air will be in place and then reinforcing during the event. Antecedent cold air is very important for a big storm. However, getting cold air funneled in as the storm progresses is also important. Remember our Presidents day storm last year. We had snow and 12 degrees and it changed to sleet-- we had no cold air reinforcing the mid levels. Model data has trended a bit colder and I think this may continue for another day.


Wow, you said a lot of nothing...

YES I DID! 

I can speculate a little. This is speculation and will change. My goal will be to create a framework and then fill in the fine details as the event gets closer.

1. I believe the models will trend colder over the next day and give a decent idea of what to expect. The warmer models have stepped towards the colder models and the colder models conceded a few points and it's slowly coming together. The ensembles (same model run at lower resolution with some intentional changes added to weed out biases) have been more south and colder than the "operational" runs.

2. Once the models bottom out cold/south track wise- we see what corrections will be made back north and warmer.

3. Basement and ceiling for main locations...

Roanoke/Blacksburg- Lumped in together because this has some marks of an I-81 special. The floor of snow and ice accumulations is 2 inches with a ton of ice and freezing rain mixed in. The ceiling is a storm of over a foot or maybe more. Their odds of over a foot of snow is HIGHEST at this point. I'd estimate 40% at this point.

Lynchburg-  Basement is the same 2 inches of sleet, snow and slush. Ceiling is also over a foot of snow or more but the odds are much lower at only 25 %. Their 40% number is 8 inches.

Danville and Southside- Basement is a coating of slush and sleet, ceiling is also a foot but odds are down at under 10%. Their 40% number is 6 inches.

As we move closer, I will update and refine to give more details. We will be moving from broad to specific.
Please share my blog on FB/Twitter. If you like what you read, click and add---  I do get paid for that. :)

I'll continue to live tweet thoughts and progression during model run times. Feel free to retweet or ask me questions.

First Measurable snow of the season likely tomorrow.. Friday looking healthy!

Now, Measurable means more than a trace. I think most places see a coating to an inch starting near sunrise and ending early afternoon. A few lucky places, best shot from the VA/NC border to 460 could see up 2 inches.. depending on where banding sets up.


Friday's event looks better. Our problem getting snow has been that the flow is fast with many moving pieces, which prevents cold from meeting storms. (Adding many shortwaves working against each other)

It seems like the cold air SHOULD be in place as a low approaches from the west Friday...

3 options...

The Canadian model cuts the storm well to our west, we have some cold air and should get a snow to sleet and ice event, maybe even rain for  awhile. Shows big snows JUST north of here (Staunton north, Up 81 into PA)

The GFS (American model) storm cuts west but reforms south. We flirt with the rain/snow ice for a while in the event but still see a pretty big event. Not throwing out snow totals but it would be nice event.

Euro- more suppressed with the event and the storm goes out to sea we are on the northern fringe. Possible low Warning event (3-6 inch range type deal)


Looking at the pattern, I think we trend more towards what the Euro shows at this point. The GFS was a HUGE event, but in part was overdone because the cut west held on too long and pulled in a lot of warm air, making more precipitation. Still, Gulf Lows always have good potential.


Cold weather this week-- 2 days won't get above freezing.  (Monday, Tuesday) and Friday may not if the ice/snow comes early enough.

Powerball number ideas for snowlovers!

If you'd love to win the powerball and you like snow-- here are some numbers to play.




We have three threats to watch: Jan 15, 18 and 21.

Add in 58 and 66 for the blocky stronger el Nino years that were snowy here in Lynchburg, Roanoke, Danville and Blacksburg. (15,18, 21, 58, 66)

3 for your money ball for 3 threats.

We could have 3 events, (Unlikely) We could have NO events, (Unlikely)  For our specific region, a good guess at this point is that we get one decent event out of the 3 and one that flirts with us. Decent doesn't JUST mean snow. Could be snow, ice ..etc.


What could go wrong? 

We have many moving pieces between the northern jet and the subtropical jet. The models have not resolved any of these pieces and much can go wrong still. The Euro model last night has us on the fringe of 2 events, the 15th and the 18th.. and with that being 7 and 10 days away I'd take those solutions at run with it because stronger events just about always trend north. As of now, the Crush NC and parts of eastern VA. However, with fast moving pieces, the energy CAN get shredded and the northern branch COULD crush the southern branch.

As the model run ends day 10, the 18th storm is east of Hatteras and one more threat can be seen emerging from the 4 corner regions.

My 1966 analog has been front and center on the Super Ensemble page and some of the less snowy 1998 analogs are showing up still, but have dropped on the rankings.

We could also see some light snow and flurries for a period Tuesday. Not a big event, but perhaps a warning shot much like we had on Valentines day last year.


*** Read this closely: I'm not forecasting 3 storms. I am creating awareness of 3 possible events. That means we could get 1, 2, 3 or NONE of these events ***

I'll start to FB and Tweet out more specific information about model runs over the next few days. You can follow me personally, my Lynchburg Weather Page or LynchburgWx twitter handle.

** read this carefully** Don't fall for the schmucks putting computer generated snow maps 5 to 10 days out on facebook. It's such a bad practice. Feel free to ask me, and they can be very fun to look at BUT they create bad expectations and are hard to work around because of the expectations people feel from them.

Please continue to share me on FB and twitter. I'm not "buying" false likes, I'm earning them.

If I could update my Winter 2015-2016 outlook-- I would change??

At this point, NOTHING!

Look, I blew December. I figured there'd be a warm spell. No idea it be a top 2 warmest Christmas week ever and the warmest December on record by 5-6 degrees most areas. Simple didn't see that and even if I did, I'd have tempered it back because that was such a rare event.

The meat of my forecast was Slightly above normal snowfall, centered from Late January till Middle to late February. The "Godzilla" El Nino is making the pattern look different than last year, but in a "sensible weather" (AKA, what you get outside") may not be off that far from last year where we had some colder temps, but the bulk of the snow fell in 2-3 weeks. (Subtract the -10 temp departure and make it -3 to -5 for a 30 day period. )

I still like that Jan 20th ish till Mid February Time frame for the bulk of our winter. I still like my original numbers which are WinterOutlook 

Lynchburg 20-25 inches.  Roanoke 25-30 inches, Blacksburg 30-40 inches, Danville 10-20 inches.

Now, there is never a sure thing and somethings can still go wrong. I want to show you the Super Ensemble matching dates for 11 days from now

This is a 500 MB map. Pay no attention.. Look at the dates on the lower right hand side. They "match" 5 day patterns from 11 days out. Those dates are clustered..

2 dates in 1983 where we were 2-3 weeks away from a HUGE snow storm. (but not that close that this pattern mattered)

4 dates in 1998-- 3 are close to 2 big Nor Easters. the first one was a HUGE Mountain snow storm that just missed LYH, and changed to Rain in Roanoke and the second was a near miss, but so close too.

Random 06 date that did nothing.

1978 2 days before a HUGE blizzard to our Northeast.

1958 2 weeks before a BIG snowstorm.

1966-- A day in between 2 storms that dumped a collected 2 feet on our area, 12 or so each event.

Point being, we are entering into a "loaded" pattern that still has a legit shot to verify my outlook snow wise. Temperatures, no way to recover from that +12 last month, but I think we do finish January below normal and likely February too.

 With that, you can see how some analogs years LOOKED close with the pattern but did not deliver. 1998 downfall was cold air.. and I looking at the arctic oscillation I think that's not going to be a problem. If a pattern like this holds on long enough, eventually it will deliver something to our region.

Speaking of the arctic oscillation, it looks to drop VERY low and when it does, it tends to drop that low again not soon after. Remember that a POSITIVE AO tends to keep the cold air bottled up in the Arctic Region and the Negative Phase is a "weaker polar vortex" which pushes cold air AWAY from the north pole and down to the middle latitudes where we live.  This supports my idea of a nice 20 day run of winter. So, Martin Luther King day and forward, I am expecting my pattern to deliver and there is actually a "chance" middle of next week something brings us a little snow or ice.


Last idea and then I'll let you be. Don't trust anyone who puts "weather" in a Facebook page. Outside of the "news media" there are very few places I would trust. If anyone posts a map of snowfall totals for 2-3 weeks out, my suggesting is to not follow them. ONE run of any model can get you any solution, especially 12 days out. I don't mind questions being asked to me ever.. you all know I love this stuff. However, I want my readers to be educated enough to know that people who post hype are not good follows.

Weather for Santa's ride and other medium range outlook.

I've gotten several texts, calls and messages asking why I've not updated. Here is the skinny-- When the weather is boring and warm, I usually won't update. Your local TV guy, app does a decent job telling you to expect 55 and sunny. The blog is dusted off when winter weather is approaching or worth discussing.

Crazy warm today-  likely near record level today and a tad cooler but not much cooler Christmas day.

Now, I did expect a warmer than normal December but NOT this warm. We are 8.5 degrees above normal in Lynchburg and 7.9 degrees normal in Roanoke.

When will the pattern change?

We should start to regress back towards normal temps by the New Year. I'm not sure if this is short term 7-10 days or a longer range shift. It's typical for El Nino winters to have second half loaded winters, as mentioned in my winter outlook. There is some reason to "hope" for winter weather in that period.

We are seeing a "disruption" in the force so to speak which should disturb the polar vortex. This should allow for some colder weather by Jan 20th or so as previously discussed in our winter outlook.

Merry Christmas to all!