KamuSnow Posted January 5, 2015 Share Posted January 5, 2015 Lack of snow builds appreciation for it when it finally happens. Don't think I would like being where it snows regular without fail. I'm inclined to agree, although I enjoyed the later snowfalls last winter as much as the early ones. Link to comment Share on other sites More sharing options...
Absolute Humidity Posted January 5, 2015 Share Posted January 5, 2015 I'm so ready for this, I did a marathon jobsite visit today so I wouldn't have to tomorrow. Partly to avoid the first snowy rush hour but also just to be able to enjoy it. Normally the first area wide snow tends to create greater traffic issues than snowfalls later in the season. Not sure if it has to do with practice or what. Tomorrow might not be bad since it's the morning rush hour which is more about people getting from point A to point B, and since it will be plenty cold tonight it should be a dry powdery snow on cold surfaces. I wonder if PennDOT has some kind of algorithm for conditions based on ground temps, temperature while snowing, rate of snowfall, ratios, type of snowflakes, etc. I'll be at work so will have to live it vicariously through Ray's Snow ruler cam Link to comment Share on other sites More sharing options...
famartin Posted January 5, 2015 Author Share Posted January 5, 2015 I'll be at work so will have to live it vicariously through Ray's Snow ruler cam Hopefully wunderground is good about updating it tomorrow, they can have odd gaps between updates. I'll be watching it mostly thru the device itself, but for your sake Link to comment Share on other sites More sharing options...
KamuSnow Posted January 5, 2015 Share Posted January 5, 2015 I'll be at work so will have to live it vicariously through Ray's Snow ruler cam There you go....windows work too if you have access to any. Then you might get the "What, haven't you ever seen snow before?". Link to comment Share on other sites More sharing options...
JSchwake28 Posted January 5, 2015 Share Posted January 5, 2015 I'm so ready for this, I did a marathon jobsite visit today so I wouldn't have to tomorrow. Partly to avoid the first snowy rush hour but also just to be able to enjoy it. Normally the first area wide snow tends to create greater traffic issues than snowfalls later in the season. Not sure if it has to do with practice or what. Tomorrow might not be bad since it's the morning rush hour which is more about people getting from point A to point B, and since it will be plenty cold tonight it should be a dry powdery snow on cold surfaces. I wonder if PennDOT has some kind of algorithm for conditions based on ground temps, temperature while snowing, rate of snowfall, ratios, type of snowflakes, etc. Not sure if they have an algorithm themselves, but they do have those variables factored in by their forecasters. I was a road weather forecaster for a couple of years and we had an in-house model that used the user forecasted cloud cover, precip rate, sun angle, temperature, wind, etc. to output recommended snow removal techniques. PennDOT was one of our clients but they seemed to be on the way out as I was leaving last year, I imagine even if they went another vendor they'd be receiving similar forecasts. Sorry for the off topic! As for tomorrow, it is always nice to see that first snowfall.. I am a little concerned about dry air. It's such a quick mover so 1-2 hours of precip not reaching the ground could mean the difference between a nice coating and 2 inches. Link to comment Share on other sites More sharing options...
KamuSnow Posted January 5, 2015 Share Posted January 5, 2015 Not sure if they have an algorithm themselves, but they do have those variables factored in by their forecasters. I was a road weather forecaster for a couple of years and we had an in-house model that used the user forecasted cloud cover, precip rate, sun angle, temperature, wind, etc. to output recommended snow removal techniques. PennDOT was one of our clients but they seemed to be on the way out as I was leaving last year, I imagine even if they went another vendor they'd be receiving similar forecasts. Sorry for the off topic! As for tomorrow, it is always nice to see that first snowfall.. I am a little concerned about dry air. It's such a quick mover so 1-2 hours of precip not reaching the ground could mean the difference between a nice coating and 2 inches. Thanks for the reply and the insight. A coating to 2" is a good range. At least there won't be precipitation type issues. Link to comment Share on other sites More sharing options...
Animal Posted January 6, 2015 Share Posted January 6, 2015 looks to be more of a nusiance type of event. Just enough to get the leaf blower out Final call - PHL airport 1.2 inches Link to comment Share on other sites More sharing options...
Ralph Wiggum Posted January 6, 2015 Share Posted January 6, 2015 looks to be more of a nusiance type of event. Just enough to get the leaf blower out imp: Final call - PHL airport 1.2 inches Solid call Link to comment Share on other sites More sharing options...
Kevin Reilly Posted January 6, 2015 Share Posted January 6, 2015 I will go with 2.3" here in Media and Philly International seems reasonable gotta watch carve over mountains and a dewpoint at zero right now is a bit frightening Link to comment Share on other sites More sharing options...
Quakertown needs snow Posted January 6, 2015 Share Posted January 6, 2015 clipping Link to comment Share on other sites More sharing options...
hazwoper Posted January 6, 2015 Share Posted January 6, 2015 The HRRR looks awful for my area and TTN Link to comment Share on other sites More sharing options...
Mitchell Gaines Posted January 6, 2015 Share Posted January 6, 2015 Still concerned about the dry airmass in place could result in models overdoing qpf. Link to comment Share on other sites More sharing options...
RedSky Posted January 6, 2015 Share Posted January 6, 2015 Para is up near .2" for parts of the area Link to comment Share on other sites More sharing options...
SnowGoose69 Posted January 6, 2015 Share Posted January 6, 2015 Still concerned about the dry airmass in place could result in models overdoing qpf. RHs near 30-35% with temps near 20F often don't take long for snow to fall from my experience...also decent RH in the 5K-15K layer on most models, I think it'll reach the ground relatively fast most places. Link to comment Share on other sites More sharing options...
Blizzard-on-GFS Posted January 6, 2015 Share Posted January 6, 2015 The HRRR looks awful for my area and TTN Out of its range. Link to comment Share on other sites More sharing options...
KamuSnow Posted January 6, 2015 Share Posted January 6, 2015 21F here and a (1 day past) full moon shining through thin high clouds, with a large diameter halo. Link to comment Share on other sites More sharing options...
Absolute Humidity Posted January 6, 2015 Share Posted January 6, 2015 20.9 RH 45% per the Davis. Link to comment Share on other sites More sharing options...
famartin Posted January 6, 2015 Author Share Posted January 6, 2015 RHs near 30-35% with temps near 20F often don't take long for snow to fall from my experience...also decent RH in the 5K-15K layer on most models, I think it'll reach the ground relatively fast most places. It'll depend a lot on what's going on with low level advection. Most cases I can recall where precip had trouble starting were instances with continuous advection of dry low level air into the area from the northeast. Link to comment Share on other sites More sharing options...
Absolute Humidity Posted January 6, 2015 Share Posted January 6, 2015 It'll depend a lot on what's going on with low level advection. Most cases I can recall where precip had trouble starting were instances with continuous advection of dry low level air into the area from the northeast.Too bad the ruler cam doesn't have verga vision. Link to comment Share on other sites More sharing options...
KamuSnow Posted January 6, 2015 Share Posted January 6, 2015 20F and cloudy here. My my, look at that :-): Link to comment Share on other sites More sharing options...
KamuSnow Posted January 6, 2015 Share Posted January 6, 2015 It's snowing! Lightly, with very fine flakes. Began about 5:45, about 15 minutes after the leading edge moved over on radar, so not too much lost to virga, apparently. 20F. Woohoo! Link to comment Share on other sites More sharing options...
ChescoWx Posted January 6, 2015 Share Posted January 6, 2015 First few flakes starting to fall here in NW Chester County PA Temp 17.5 Wind Calm RH 57% DP 4.9 Link to comment Share on other sites More sharing options...
ChescoWx Posted January 6, 2015 Share Posted January 6, 2015 Snow picking up now steady but light here in East Nantmeal Twp Temp down to 17.4 very little virga Link to comment Share on other sites More sharing options...
dan88 Posted January 6, 2015 Share Posted January 6, 2015 Very light, but snowing here North of Wilmington. Link to comment Share on other sites More sharing options...
KamuSnow Posted January 6, 2015 Share Posted January 6, 2015 Temp. 19F, with a steady light snow. Driveway and car tops showing a light coating already. Light NE wind, RH 71%. Link to comment Share on other sites More sharing options...
iceman56 Posted January 6, 2015 Share Posted January 6, 2015 18.6F with DP of 7. Light snow in NW Chesco with a coating on the ground. Link to comment Share on other sites More sharing options...
Ralph Wiggum Posted January 6, 2015 Share Posted January 6, 2015 Light snow in Warminster...19f. Link to comment Share on other sites More sharing options...
ChescoWx Posted January 6, 2015 Share Posted January 6, 2015 Snowing steadily all surfaces covered in NW Chesco visibility down to 1.25 mi at KMQS and 0.75 at KLNS Temp down to 16.0 Link to comment Share on other sites More sharing options...
KamuSnow Posted January 6, 2015 Share Posted January 6, 2015 Light steady snow here, 0.20" so far. Snow making that squeaky crunchy sound when you walk on it. 18F, RH 78%. Link to comment Share on other sites More sharing options...
Tatamy Posted January 6, 2015 Share Posted January 6, 2015 Steady light snow here in Bethlehem. Roads are snowcovered and slick. 16 / 12 Link to comment Share on other sites More sharing options...
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