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Feb 16th/17th/18th Winter Wx


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Good morning Alan. Do you have any changes to what you posted yesterday based on the latest modeling? I'm hoping that the local schools are letting out early enough today in the Triad. The school I teach at is getting out at 1:45, with buses on the road for a couple of hours after that. Keeping my fingers crossed that no renegade moisture gets in here until after 4:00 when the wsw officially begins.

You're not already out for Presidents day?

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I think 1-2 inches of snow/sleet is pretty generous for Wake County...    I think my reasoning is experience more than anything...  Seen this scenario many times.  

 

Definitely see it being more of a freezing rain event than anything...  Strong gradient over Wake Co. probably.

 

 

Been through these many times too, counting on the near surface cold layer being a little deeper than model show, they often times underestimate this at the onset. WIll certainly changeover though.

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Biggest thing I see is how quick a storm 8-10 hours maybe? couple days ago it looked like 24-30 hour storm? Why can't we ever get a long duration storm anymore?

The lack of blocking has fouled up our chances the whole winter. Can't sustain the cold during the precip and allowing lows to track north. Hopefully you get to see some flakes today and enough to plow a little!
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We're right in the thick of things... :(

 

Our winter storm is likely to start as snow in most of the viewing area. However, in the Triangle and surrounding counties we will likely see a change over to sleet and then freezing rain by 8-9pm. This map is a computer model image of how much ice may accumulate. At 1/4" we begin to see power outages. The darker color is 1/2". Widespread power outages are certainly possible with this scenario. -EG

11001626_10153238417044258_8279761214282
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Biggest thing I see is how quick a storm 8-10 hours maybe? couple days ago it looked like 24-30 hour storm? Why can't we ever get a long duration storm anymore?

That's what happens with everything gets focused in the lead wave and there is no second round. 

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I am just wondering if sleet may be a large factor for everyone given how cold the sfc will be. Euro is still showing the trianle near 20 degrees in the early morning hours tomorrow. That's really really cold for a zr storm.

I think that's what a lot of TV mets are banking on, no one is sounding the ZR alarm maybe because of this...

 

edit: Except Elizabeth G. of WRAL apparently...haha

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Rapid influx of 850mb warming


 


To show the force of the warmer air starting to flood in at the 850mb level, as of 7:45am this morning Mount Mitchell has rising to 30.6 degrees whereas just to the NE, Grandfather Mountain is still at 8.5 degrees and Beech is at 10.3 degrees.


 


Winds at Mitchell are West at 21 and at Grandfather they are on the edge of turning from the SE to the West


 


These observation points provide a real time method to track what is going on at the 850mb level.


 


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Looking at the 6z GFS low resolution p-types, it looks like Raleigh north and west might receive more sleet and escape a lot of the freezing rain. We can only hope. Again I would love 3" of sleet.

 

http://mag.ncep.noaa.gov/Image.php?image=data%2Fgfs%2F06%2Fgfs_namer_030_dom_precip_type.gif&model=gfs&area=namer&storm=&cycle=06&param=dom_precip_type&fhr=030&group=Model+Guidance&imageSize=M&ps=area&use_mins=no&preselected_formatted_cycle_date=20150216+06+UTC&scrollx=0&scrolly=0

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