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Dec 27-29th LES/Snow Event


Chicago Storm

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I picked up 1.9" here with .19" of water content for a nice, round 10:1. With 4.5" on the ground, even with melting and compaction, should be enough to keep the grass from showing for awhile.

Thats surprising. The snow here looks fluffier and drier than that. I wish I had got up the first time my alarm went off, so I could get a true measurement.

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Awesome winters morning 1.2" so far. Deep snow pack with Snow falling temps well below freezing is my idea on what winter should be. This winter did a 180 in these parts. Looks like additional 2" will fall thru today. No WARMUP IN SITE!!! Best part. Pond Hockey/Skating is a day or two away.

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I took some pics this morning it is GORGEOUS outside! The powder is flocked to the trees. Will upload later as I have to work 10-6. Model qpf was pretty much spot on, with downriver/extreme SE MI getting the most (I have more than DTW), the only problem being flake size was small the entire event, so rather than the fluffy powder DTX was forecasting its that sugary powder, thus snow amounts on the lower end of the forecast rather than the higher end. When I woke up at 4am it was like a white fog outside (visib MAYBE 0.5 mi) but flake size terrible.

At 8am, I had 2.0" snow with a liquid of 0.18", snow depth 7". Will probably tack on a tenth or two at most, its winding down. Onto the next one!

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my eyeballs have built in weenie-vision. Went out and actually measured 0.8". Initial estimate on what had fallen two hours ago was high.

I did the same thing :lol:. Looking at at 5am and eyeballing the spot I had cleared off on the deck, I thought I had at least 2"....as it turns out I was probably at 1.5" or so as when I measured at 8am it was 2.0"

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Thats surprising. The snow here looks fluffier and drier than that. I wish I had got up the first time my alarm went off, so I could get a true measurement.

Yeah, I'm surprised too. The surface temps were 27-28 through the entire night. I would have thought 12:1 or better. I took my measurement at 7AM and even though the snow was just winding down, I think some melting/compaction had already taken place. There were some wet spots on the sidewalk and a few drips off of roofs.

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I did the same thing :lol:. Looking at at 5am and eyeballing the spot I had cleared off on the deck, I thought I had at least 2"....as it turns out I was probably at 1.5" or so as when I measured at 8am it was 2.0"

The denser "sugary powder" always gives the impression of more depth for some reason. And I'm getting 12:1ish ratios here too so I (and the models) were off in what to expect. I was thinking 15:1. Not pure fluff but a little drier/looser than than what's been falling.

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Some more reports trickling in from central Indiana

0730 AM SNOW LAPEL 40.07N 85.85W

12/29/2012 M6.0 INCH MADISON IN BROADCAST MEDIA

0850 AM SNOW WILLIAMS 38.80N 86.65W

12/29/2012 M7.8 INCH LAWRENCE IN CO-OP OBSERVER

0851 AM SNOW 3 SW WILLIAMS 38.77N 86.69W

12/29/2012 M7.5 INCH MARTIN IN CO-OP OBSERVER

0853 AM SNOW 4 W GRAYSVILLE 39.12N 87.63W

12/29/2012 M6.8 INCH SULLIVAN IN CO-OP OBSERVER

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Measured 5.5 inches on a wood deck. Very wet, so I would say at least 6 inches with compaction. Hearing reports of 7 or 8 inches around the county. Snow depth with the last snow is probably 10-12 inches. Very nice snow. I hope that those that have been on the fringes(LAF, ect.) can cash in on the next one.

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B-Rent probably got better ratios because he was under that awesome banding last night. Good dynamics interacting with the snow growth region will often trump colder temps when determining ratios I've found.

I see AFDs talk about less QPF but better snow ratios on the NW periphery of storms all the time but, at least locally I've rarely seen that verified. Weak dynamics lead to small flake size and poor ratios, regardless of temperature.

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I picked up 1.9" here with .19" of water content for a nice, round 10:1. With 4.5" on the ground, even with melting and compaction, should be enough to keep the grass from showing for awhile.

Couldn't slant stick another 0.1" for me to verify with the 2-4" call for you, huh? :P

I'll just average your amount with the CoCoRaHS observers in greater Fort Wayne that are in the 2.0-2.5" range. Success! :lol:

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Measured 5.5 inches on a wood deck. Very wet, so I would say at least 6 inches with compaction. Hearing reports of 7 or 8 inches around the county. Snow depth with the last snow is probably 10-12 inches. Very nice snow. I hope that those that have been on the fringes(LAF, ect.) can cash in on the next one.

Congrats. And thanks for the well wishes, but even being fringed here...we haven't fared too bad compared to other places. *cough* Chicago *cough*

As AppsRunner mentioned about that band around Muncie, I live just outside of Muncie on the north, and it stayed over us for quite a while...I have measured several spots, and we are a smidge below 7"

Awesome photo. :)

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B-Rent probably got better ratios because he was under that awesome banding last night. Good dynamics interacting with the snow growth region will often trump colder temps when determining ratios I've found.

I see AFDs talk about less QPF but better snow ratios on the NW periphery of storms all the time but, at least locally I've rarely seen that verified. Weak dynamics lead to small flake size and poor ratios, regardless of temperature.

Good analysis and I agree. When I woke up at 5AM, it was a very fine snow. Not until just before it ended did we get some good sized flakes.

Couldn't slant stick another 0.1" for me to verify with the 2-4" call for you, huh? :P

I'll just average your amount with the CoCoRaHS observers in greater Fort Wayne that are in the 2.0-2.5" range. Success! :lol:

Lol. Well, you did say 2-4 for FWA. I'm in Huntington. Your forecast did not bust. I'm sure that at one point I had 2", but waited until 7, which cost me.

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Lol. Well, you did say 2-4 for FWA. I'm in Huntington. Your forecast did not bust. I'm sure that at one point I had 2", but waited until 7, which cost me.

Yeah I know, but my FWA calls include you. Close enough. :D

Measured 0.8" on my car. Brings me to 6.3" for December. Not too bad, all things considered.

Mood flakes falling here this morning. Always welcomed.

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More Indiana reports...

0907 AM SNOW VINCENNES 38.68N 87.51W

12/29/2012 M8.1 INCH KNOX IN CO-OP OBSERVER

0700 AM SNOW 5 SW PORTLAND 40.38N 85.04W

12/29/2012 M5.0 INCH JAY IN COCORAHS

0700 AM SNOW 5 SW FORT WAYNE 40.98N 85.19W

12/29/2012 M3.2 INCH ALLEN IN OFFICIAL NWS OBS

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I was looking at GRLevel3 to see some of the local storm reports from the area. It seems that the Green Bay area has 4" to 9" today. Is this true?

Yes, but it's storm total...yesterday and today. Official GRB total below.

0907 AM HEAVY SNOW ASHWAUBENON 44.46N 88.08W

12/29/2012 M6.9 INCH BROWN WI OFFICIAL NWS OBS

6 TENTHS OF AN INCH IN THE PAST 3 HOURS.

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Based on King City radar, there's actually an E-W oriented LES streamer just offshore. Winds are too light to get it this far north, but Toronto4 and Torontonian downtown should keep an eye on it.

That streamer didn't make it onshore, but there is light snow falling with better flake size compared to a few hours ago. There is a nice band just to our SW and is poised to move into the GTA in the next hour or so.

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A little over 2" down right here. Might end up with a bit more since it is still snowing. Like others have said, it's literally a picture-perfect winter scene outside. Snow is falling, trees and roads are covered... I can't take it in here anymore. Gotta get outside!

I sure as hell didn't expect this last week of December to be so awesome. Easily best winter week since Feb. 2011. We've almost made up our entire snow deficit for the month, which is impressive considering for the first 20 days we received literally nothing.

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