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Wintry February 19-21, 2020 Winter Storm

This storm reminds me of several fundamental things that tend to get overlooked in the excitement of the lead-up to the event. There is an almost overabundance of model output, with no shortage of snowfall maps.

The things that I believe are important to be kept top of mind are:

1) In most cases, the lowest snowfall map is going to be closer to reality. I mean, there are instances where that isn't the case. But more times than not, the higher end maps dont verify.

2) The HrrrrrR is always too slow moving the snow out.

3) Snow can accumulate on a warm surface and during the daytime and with temps above freezing. But as James pointed out, the accumulation process is less than efficient.

4) Warm noses usually over perform. It didn't today, but that's not usually the case.

5) Bashing the NWS or conservative media outlets is usually foolish. Sometimes they get it wrong. But they also have a greater responsibility than we - we who have the freedom to go balls to the wall for max snow in a less than ideal setup.

6) If we don't have a strong set of convergent elements for a winter storm, then going for the high end snow totals is unwise. Today, for example, was a good example of this. That's not to say you can't get a big snow, but the odds aren't in your favor.

7) It's hard to snow a lot in the SE.
 
Interesting that you all had issues with soil temps. In GA a little over a week ago we had the snow stick immediately, and it was 75 degrees three days earlier.
I think it also has a lot to do with air temps being in the mid 30s during the event you get melting from above and below plus dendrites that are already less efficient at accumulating
 
Interesting that you all had issues with soil temps. In GA a little over a week ago we had the snow stick immediately, and it was 75 degrees three days earlier.
I’m guessing you had some pretty insane rates, though? And were surface temps below freezing? Rates can certainly overcome, but those factors certainly don’t help. Maybe with mid 20s and cold soil temps you could’ve gotten 10”, for example. Here, we’re dealing with above freezing air and soil temps, so the snowpack is melting from the top and bottom as the snow falls.
 
I might be hallucinating, but these seem like some of the heaviest rates I’ve seen since sundown right now here in SW Durham.
Kinda of like a little dab of extra energy past 30 mins, back to numerous less than dime flakes. Laying nicely. Has that crystal sugar sparkle under flood lights. If me an packfan98 can make 3 inch mark, weve done very well. Was thinking far eastern Randolph could knab a 6 inch lollipop as of yesterday and to stubborn to change my 3-6 county wide. Most, if not all of county should hit 3 inch mark if we can keep this up another 90 plus minutes, easily.
 
That snowfall map I made was terrible guys, I’m truly sorry, gotta learn from the mistakes I made tho, next time I definitely need to factor more things in, sure snowfall maps are pretty but this storm is gonna teach me a lot of things
 
The area of low pressure pulls in warm moist air down from the gulf. Depending on the exact track of the Low that’s what determines where the warm nose is.


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I'll end up closing in on my yearly average at a minimum and can't say that in a year this sucky that this is anything but awesome.

I wouldnt poo poo it to quick I mean the models still have it snowing for another 7-8 hrs so 6 more hrs at least....I got 3-3.5" down and its snowing good just smaller flakes, wind is also starting to kick up so the coastal might be flexing a bit and we could see flake size pick up some....

My view right now....

 
I think it also has a lot to do with air temps being in the mid 30s during the event you get melting from above and below plus dendrites that are already less efficient at accumulating

I usually care less about soil temps, but surface temps below freezing is a must for me. I tend to forget that when I see pretty clown maps.

The combo though of surface temps + warm soil just made this a non event for the clt area imo.
 
didnt have soil temp issues. We didn’t have sun angle issues. We had lack of precip issues.
Bingo. From Day 1 in started in Mount Airy NC and trended less qpf for many many counties. It’s very hard to predict and models suffered all the way to hr zero.
 
I wouldnt poo poo it to quick I mean the models still have it snowing for another 7-8 hrs so 6 more hrs at least....I got 3-3.5" down and its snowing good just smaller flakes, wind is also starting to kick up so the coastal might be flexing a bit and we could see flake size pick up some....

My view right now....


That’s nice to see you’re doing well in Greenville, everyone area wide has been busting low or barely meeting most snow forecast thresholds, seems like you’ll be one of the few bright spots in all this
 
Based on the timing, cold air chasing moisture, sun angle, warm ground temps, not below freezing, these were the things working against us that I knew we couldn’t overcome. Having said that, I’m moving to south Florida in two weeks for work, so it was wonderful to get a little taste of winter tonight.
 
I have to say for my back yard the storm is doing exactly what I thought and Nam had painted, save maybe one inflated run with a deform tongue,slug of moisture. Ill grade it when it quits snowing. We snowed from the get go and have no idea what qpf is verse snow accum. We cooled top down fast to 32 within first hour from 41 degrees at start.
 
I usually care less about soil temps, but surface temps below freezing is a must for me. I tend to forget that when I see pretty clown maps.

The combo though of surface temps + warm soil just made this a non event for the clt area imo.
Yeah the warm surface temps mostly in my opinion. Same problem in the northern upstate. Rates didn't get heavy enough to cool the BL enough for accumulation until the precip was ending.
 
Based on the timing, cold air chasing moisture, sun angle, warm ground temps, not below freezing, these were the things working against us that I knew we couldn’t overcome. Having said that, I’m moving to south Florida in two weeks for work, so it was wonderful to get a little taste of winter tonight.
I'm not sure I fully buy into the sun angle and ground temp thing. I've personally seen it 85 degrees in Denver at 3PM and snowing and accumulating at 3AM at 33 degrees. And that was in early May!
 
Snowfall reports are generally really lacking south of Raleigh rn on NWS Raleigh's local storm report app, I definitely recommend tweeting at NWS Raleigh (or whichever NWS office is in your domain) to ensure your report is officially recorded, especially if you're in this area of central NC.

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I’m guessing you had some pretty insane rates, though? And were surface temps below freezing? Rates can certainly overcome, but those factors certainly don’t help. Maybe with mid 20s and cold soil temps you could’ve gotten 10”, for example. Here, we’re dealing with above freezing air and soil temps, so the snowpack is melting from the top and bottom as the snow falls.
The rates were definitely insane. My temp was at 34-35 for the duration.
 
Snow just picked up again. Big flakes.
Just took my third Jeb Walk. Walked to the Kia dealership next to my complex and under all the lights it’s freaking beautiful out there. Highly recommend viewing snow from a car dealership under the lights during moderate/heavy nighttime snow. I avoided the puddles this time and tried to ignore that the road was slushy/wet and had a better time, haha. :p

One plus of it not being very cold is that....well, it’s not very cold, so you can walk around in it pretty comfortably. ?
 
A local TV Met bashing “social media” Mets tonight. Sad. I can’t recall any of the “better known” social media forecasters ever bash WRAL or TV Mets publicly. Sad to see someone use their platform and bring other down to raise themselves.
 
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