ski MRG Posted December 8, 2010 Share Posted December 8, 2010 For those who are wondering what Phil is talking about Windex stands for Winter Instability snow squalls During the early 90’s a wintertime instability index (WINDEX) was developed to assess the potential for snow squalls along frontal boundaries across New England. It was that study which attempted to quantify moisture, lift and instability in the low levels of the atmosphere needed to produce snow squalls in an environment unstable in respect to shallow upright convection. Windex calculation You calculate the difference between the T1 and the T5 if it is over 10, and especially over 15, you then look at the lifted index.. if it rises significantly after the proposed event, and the RH at R1 is over 50%, you will have instability squalls. T1: Temperature in the 35 mb closest to the surface T5: Temperature at 800 mb R1: Relative Humidity in the 35 mb closest to the surface Lifted Index: Instability index calculated by lifting parcels from the surface to 500 mb and subtracting the temperature of its environment from the parcel temperature. So how much snow for me? Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 Well you mentioned some heavier squalls with the arctic front...that's a WINDEX...at least for us it is. Up in BTV CWA they have more things going on like the Lake, upslope and are closer to the synoptic moisture. We could get some flakes, but I don't think we'll see any heavy squalls. Oh I agree but I also believe there is a synoptic element which enhances a poor Windex environment. I think that there is an extension south. That's all, Phil apparently did not understand me either. As far as him saying Windex is used too often, can not remember too many but whatever. Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 So how much snow for me? At 2k LOL, just keep an eye on the sky! Where are the pics? Link to comment Share on other sites More sharing options...
Tropopause_Fold Posted December 8, 2010 Share Posted December 8, 2010 Oh I agree but I also believe there is a synoptic element which enhances a poor Windex environment. I think that there is an extension south. That's all, Phil apparently did not understand me either. As far as him saying Windex is used too often, can not remember too many but whatever. eh, no worries. i guess i misunderstood. i thought folks were tossing around windex a few days back too and made the (incorrect) assumption that you were suggesting this again. Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 eh, no worries. i guess i misunderstood. i thought folks were tossing around windex a few days back too and made the (incorrect) assumption that you were suggesting this again. No prob. Way upstate NYS had a tremendous Windex event last week as a Polar front backdoored upper NYS. Some places had winds near 70 with 4 inches of snow with thunder with a huge wind shift from SW to NE. Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted December 8, 2010 Share Posted December 8, 2010 For those who are wondering what Phil is talking about Windex stands for Winter Instability snow squalls During the early 90’s a wintertime instability index (WINDEX) was developed to assess the potential for snow squalls along frontal boundaries across New England. It was that study which attempted to quantify moisture, lift and instability in the low levels of the atmosphere needed to produce snow squalls in an environment unstable in respect to shallow upright convection. Windex calculation You calculate the difference between the T1 and the T5 if it is over 10, and especially over 15, you then look at the lifted index.. if it rises significantly after the proposed event, and the RH at R1 is over 50%, you will have instability squalls. T1: Temperature in the 35 mb closest to the surface T5: Temperature at 800 mb R1: Relative Humidity in the 35 mb closest to the surface Lifted Index: Instability index calculated by lifting parcels from the surface to 500 mb and subtracting the temperature of its environment from the parcel temperature. Thanks Steve Was never aware of it's meaning and how it is figured. Is there a comparative index for summer convective events (Wiz should chime in) What is my homework? Link to comment Share on other sites More sharing options...
ski MRG Posted December 8, 2010 Share Posted December 8, 2010 At 2k LOL, just keep an eye on the sky! Where are the pics? OBS thread., Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 Thanks Steve Was never aware of it's meaning and how it is figured. Is there a comparative index for summer convective events (Wiz should chime in) What is my homework? WIZDEX Calculate Wizs alcohol intake divide by number of 40 s he consumed then you can figure out how many times he replies to himself in one thread. Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 Thanks Steve Was never aware of it's meaning and how it is figured. Is there a comparative index for summer convective events (Wiz should chime in) What is my homework? Showalter Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted December 8, 2010 Share Posted December 8, 2010 WIZDEX Calculate Wizs alcohol intake divide by number of 40 s he consumed then you can figure out how many times he replies to himself in one thread. Take the integral of the month's until Miley turns legal and find the derivative of the number of Jets fans he p issed off last night Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 Take the integral of the month's until Miley turns legal and find the derivative of the number of Jets fans he p issed off last night Oh yea one more index for you SWEAT , severe weather http://www.skystef.be/calculator-sweatindex.htm Link to comment Share on other sites More sharing options...
Tropopause_Fold Posted December 8, 2010 Share Posted December 8, 2010 this is crazy: Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted December 8, 2010 Share Posted December 8, 2010 Showalter Ahhh... makes sense. That Windex event last January was great. Too bad the old threads from EUSWX are kaput Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 this is crazy: Record territory, Vikings move back to Greenland,Pete as Erick the Red. Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted December 8, 2010 Share Posted December 8, 2010 Ahhh... makes sense. That Windex event last January was great. Too bad the old threads from EUSWX are kaput Interesting to read Dr. Colby's stuff on Windex, as well (from UML) Link to comment Share on other sites More sharing options...
cpickett79 Posted December 8, 2010 Share Posted December 8, 2010 this is crazy: a nice west based -NAO.....lets roll the dice....we might need hand warmers......cause we ain't got the hot hand that's for shizzle Link to comment Share on other sites More sharing options...
TalcottWx Posted December 8, 2010 Share Posted December 8, 2010 Would the windex event make it as far east as Maine? Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 Interesting to read Dr. Colby's stuff on Windex, as well (from UML) Link? Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 Would the windex event make it as far east as Maine? GYx says you continue to downslope with only AC altocumulus. Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted December 8, 2010 Share Posted December 8, 2010 Link? Sorry, it is a powerpoint Looking for the paper... http://storm.uml.edu/~colby/snowsquall-mm5.ppt Link to comment Share on other sites More sharing options...
cpickett79 Posted December 8, 2010 Share Posted December 8, 2010 18z nam winding up a tropical like thing off florida hours 54 plus...not sure how this would effect anything but ... position of the high on 18z fri would lead to less SW flow and cooler high temps. Link to comment Share on other sites More sharing options...
Mr Torchey Posted December 8, 2010 Share Posted December 8, 2010 What an interesting little critter down off the se coast. Gfs has had it for a few runs, now the nam is blowing up all sorts of moisture at hour 60. Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 8, 2010 Author Share Posted December 8, 2010 Sorry, it is a powerpoint Looking for the paper... http://storm.uml.edu/~colby/snowsquall-mm5.ppt Awesome I remember both of those very well, posted on WWBB , would love to get that WINDEX 2.0 software. Link to comment Share on other sites More sharing options...
dryslot Posted December 8, 2010 Share Posted December 8, 2010 What an interesting little critter down off the se coast. Gfs has had it for a few runs, now the nam is blowing up all sorts of moisture at hour 60. Hr 81, Its still sitting there, So much for the clipper on the nam, It says what clipper......... Link to comment Share on other sites More sharing options...
ChrisM Posted December 8, 2010 Share Posted December 8, 2010 Hr 81, Its still sitting there, So much for the clipper on the nam, It says what clipper......... does a professional have any insight onto what effects this thing might have? or anyone for that matter I guess Link to comment Share on other sites More sharing options...
cpickett79 Posted December 8, 2010 Share Posted December 8, 2010 Hr 81, Its still sitting there, So much for the clipper on the nam, It says what clipper......... the ghosts of 2010 manifested this thing....and it will be used to bend us over in someform......i think the green mountains may somehow get a Historic Blizzard out of the coming set up. There are signs of unheard of temperature gradients setting up monday and ferocious winds as well. hopefully we could do better. Link to comment Share on other sites More sharing options...
MaineJayhawk Posted December 8, 2010 Share Posted December 8, 2010 Hr 81, Its still sitting there, So much for the clipper on the nam, It says what clipper......... Clipper put through the wood chipper. This won't be good for the main event. Link to comment Share on other sites More sharing options...
Mr Torchey Posted December 8, 2010 Share Posted December 8, 2010 Clipper put through the wood chipper. This won't be good for the main event. No doubt the clipper plays a role but so does the ridge out west, hopefully a little weaker and east, let this sw be a little flatter, faster, phase later, lots of players on the field. Link to comment Share on other sites More sharing options...
cpickett79 Posted December 8, 2010 Share Posted December 8, 2010 Clipper put through the wood chipper. This won't be good for the main event. the clipper is dead to me...... Link to comment Share on other sites More sharing options...
dryslot Posted December 8, 2010 Share Posted December 8, 2010 No doubt the clipper plays a role but so does the ridge out west, hopefully a little weaker and east, let this sw be a little flatter, faster, phase later, lots of players on the field. Yeah, I think the clipper is done, That sw moves into canada, If we want to see a storm here we will need all 3 of those scenarios to come into play to get this sw further east, I don't think we can rule anything out and right now, Based on some of the east trends on some of the models and ensembles from today, I think a coastal hugger could come into play, Just my thoughts...... Link to comment Share on other sites More sharing options...
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