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The Jan 9-10 Storm Part 4


Cheeznado

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Beware of the warm nose on this bad boy. Im at Hwy 82 NW MS and all day long i've sat at mid 20's with light freezing rain, sleet. Output hasnt matched what was progged. For some reason here on the river we just never have been able to switch over. Had about 20 mins of snow this a.m. Now i'm hoping i can get something from the back edge as southern AR and Shreveport have switched over. BTW 60 miles NW of me in S AR theyve reported snow all day. Hope everyone else fares better.

I'm not sure exactly but if your on 82 in Greenville, you're just a little too much in the strong warm advection. From Clarksdale to Tupelo has been the line, or is right now.

post-38-0-12230700-1294613265.gif

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that sucks....hopefully it is close. the radar is (obviously wrong lol) but showing snow as the precip over your area. have you checked the soundings?

edit: the nws is apparently expecting a changeover with a couple of inches in the forecast. how much frz rain do you have?

Right its been wrong all day, havent checked soundings but i do recall some discussion this morning about the temps being slightly warmer. What im counting on is as the low moves over it will switch like it has in shreveport
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I called the RAH NWS about 30 minutes ago, basically told them I thought they were wrong. The guy could give me a straight answer when I told him about the radar, the over-performance of the storm, and the RUC, and he had a Ph.D.

Those are good folks in the RAH office. I'm surprised thay actually had time to chat, and I'm sure by now they've had experience with folks calling to tell them they are wrong.

Not really sure what would be accomplished by doing so, however...

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Does the RUC have a warm bias?

Hope so, because the 21z RUC has all Ga., and almost all of S.C. above 0 at 10 a.m.!

The closest 18z NAM map is three hours later and it STILL has the 0c line well south of where the RUC depicts it.

In fact, it's not until 1.AM TUESDAY, that the 18z NAM 850 line gets to where the 21z RUC has it at 10 a.m. MONDAY!!

HELP?!?!?

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I'm getting very worried about what the RUC is starting to show for Northern GA and Upstate SC. It has the 850 line jump way farther north than the NAM or the GFS. Right now it is changing the snow over to sleet in athens,ga and anderson,SC by 8am. The NAM and GFS have these placing changing over around 11 or 12.

I remember tracking a storm a few years back when the RUC suddenly showed higher 850's than the other models and it came to fruition and switched me over to rain several hours early.

Edit: I just saw your post beanskip... it has me worried too!

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that sucks....hopefully it is close. the radar is (obviously wrong lol) but showing snow as the precip over your area. have you checked the soundings?

edit: the nws is apparently expecting a changeover with a couple of inches in the forecast. how much frz rain do you have?

just a glaze of freezing rain, hasnt been heavy at all. that along with a bit of sleet. Started off with a quick accum of sleet and snow for20 mins then went down hill from there.
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Does the RUC have a warm bias?

Hope so, because the 21z RUC has all Ga., and almost all of S.C. above 0 at 10 a.m.!

The closest 18z NAM map is three hours later and it STILL has the 0c line well south of where the RUC depicts it.

In fact, it's not until 1.AM TUESDAY, that the 18z NAM 850 line gets to where the 21z RUC has it at 10 a.m. MONDAY!!

HELP?!?!?

RUC does have a warm bias.

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I'm getting very worried about what the RUC is starting to show for Northern GA and Upstate SC. It has the 850 line jump way farther north than the NAM or the GFS. Right now it is changing the snow over to sleet in athens,ga and anderson,SC by 8am. The NAM and GFS have these placing changing over around 11 or 12.

I remember tracking a storm a few years back when the RUC suddenly showed higher 850's than the other models and it came to fruition and switched me over to rain several hours early.

Edit: I just saw your post beanskip... it has me worried too!

Looking at radar trends, it seems the precip. and storm is making it further north. I wonder if this is the reason for the 850's also moving north?

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just a glaze of freezing rain, hasnt been heavy at all. that along with a bit of sleet. Started off with a quick accum of sleet and snow for20 mins then went down hill from there.

i took a guess for your area (you can check on twisterdata.com, RUC) - its only out 3 hr on the new run, but it looks like its getter closer to a snow sounding. good luck! waiting isnt ever fun

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I'm getting very worried about what the RUC is starting to show for Northern GA and Upstate SC. It has the 850 line jump way farther north than the NAM or the GFS. Right now it is changing the snow over to sleet in athens,ga and anderson,SC by 8am. The NAM and GFS have these placing changing over around 11 or 12.

I remember tracking a storm a few years back when the RUC suddenly showed higher 850's than the other models and it came to fruition and switched me over to rain several hours early.

Edit: I just saw your post beanskip... it has me worried too!

underestimating the CAD. No way our temps are above freezing at 10am. 850's maybe, but not surface temps

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The WAA at 850 is going to be very strong later tonight- the WSI WRF and the HRR say a changeover will occur all the way up to GSP by just after 12Z- I still think the Upstate and NE Gorgia will get 6" of snow, but those hoping for more may be disappointed unless you are in rthe mountains. I will be in Lavonia, GA later tonight and I would be surprised if I got too much more than 6" there. The above GSP map seems to be ballpark in the lower elevations, may be underdone a tad in the mountains.

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Good deal Tony!! What's your temp/dp? I see you broke out the special avatar for this occasion!

Over at Experiment they had dp still 2.6 Wetbulb 26.6... here my temp is 33. Coming down steady. Yep, the mojo you gave seems to be working! T

Edit...man, I'm glad the Falcons aren't playing, I haven't been able to keep up with this game, and it is right in front of me, lol.

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The WAA at 850 is going to be very strong later tonight- the WSI WRF and the HRR say a changeover will occur all the way up to GSP by just after 12Z- I still think the Upstate and NE Gorgia will get 6" of snow, but those hoping for more may be disappointed unless you are in rthe mountains. I will be in Lavonia, GA later tonight and I would be surprised if I got too much more than 6" there. The above GSP map seems to be ballpark in the lower elevations, may be underdone a tad in the mountains.

I'm having a hard time believing that given that we should have some pretty strong dynamics in play and combined with the heavy rates should keep the column pretty cold. I'm assuming this is what the local stations are showing and it shows it switching to sleet here by 1am which I think is virtually impossible.

There is a world of difference between these models you are talking about and the gfs/nam for sure but all models often times do a crappy job of determining precip type in these situations since they can't recognize dynamical cooling some of the time.

Wouldn't be surprised though if you have an area of heavy snow surrounding by sleet/FZ later on. Going to be interesting to see how it plays out.

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The WAA at 850 is going to be very strong later tonight- the WSI WRF and the HRR say a changeover will occur all the way up to GSP by just after 12Z- I still think the Upstate and NE Gorgia will get 6" of snow, but those hoping for more may be disappointed unless you are in rthe mountains. I will be in Lavonia, GA later tonight and I would be surprised if I got too much more than 6" there. The above GSP map seems to be ballpark in the lower elevations, may be underdone a tad in the mountains.

:( Everything was looking so good too. Almost too good to be true. Honestly, i'm not suprised though. Happens with every winter storm here in the upstate.

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