dendrite Posted July 20, 2018 Share Posted July 20, 2018 6 minutes ago, powderfreak said: Yeah the past couple days have the look in the mountains of a Canadian air source, where from Mt Mansfield in VT, it looks like you can touch MWN over in NH. It's that clear...as low dews typically are with less water vapor in the surface layer. Most of the obscuration is due to particulates/haze. When the source region is the megalopolis the air quality alerts start to spring up and we get the HZ ALOFT obs from MWN. If we can back in a (pick your own B country) blue airmass from a tropical source region, the visibility tends to be pretty high too despite higher dews. Link to comment Share on other sites More sharing options...
Typhoon Tip Posted July 20, 2018 Share Posted July 20, 2018 12 minutes ago, powderfreak said: Yeah the past couple days have the look in the mountains of a Canadian air source, where from Mt Mansfield in VT, it looks like you can touch MWN over in NH. It's that clear...as low dews typically are with less water vapor in the surface layer. wv is really not that bad on visibility to tell you the truth... It's that 'baze' that causes that pal and bad air quality - it's a mix of ozones and biomist ... poly aeromatic particulates, baked in the oven ... think (biological farts + water vapor + contaminant aerosol (usually man-made) + solar energy) = can't see MWN Link to comment Share on other sites More sharing options...
powderfreak Posted July 20, 2018 Share Posted July 20, 2018 28 minutes ago, dendrite said: Most of the obscuration is due to particulates/haze. When the source region is the megalopolis the air quality alerts start to spring up and we get the HZ ALOFT obs from MWN. If we can back in a (pick your own B country) blue airmass from a tropical source region, the visibility tends to be pretty high too despite higher dews. 26 minutes ago, Typhoon Tip said: wv is really not that bad on visibility to tell you the truth... It's that 'baze' that causes that pal and bad air quality - it's a mix of ozones and biomist ... poly aeromatic particulates, baked in the oven ... think (biological farts + water vapor + contaminant aerosol (usually man-made) + solar energy) = can't see MWN Ahh very interesting guys. I honestly always thought it was the increasing water vapor in the boundary layer. So it's more the man-made crap from say the Ohio Valley and big urban areas like NYC/PHL, etc blowing in on S/SW winds? Where as the crisp air is just unmolested air from Canada? I guess I just always put it together like, hey the visibility is hazy and can't see past eastern VT hills, and MVL has a Td of 68F. Then other times it's like wow I can touch MWN and wave to the observatory... and MVL has a 42F dew. Just made that connection and assumed... Link to comment Share on other sites More sharing options...
TauntonBlizzard2013 Posted July 20, 2018 Share Posted July 20, 2018 We need the rain here so obviously we’re going to get porked Link to comment Share on other sites More sharing options...
ice1972 Posted July 21, 2018 Share Posted July 21, 2018 So the sky is still that great classic blue in say the USVI? Or even say Key West or something? I always know the dry air is has arrived when the sky is thy great blue color.....missed that in summer when we moved east from SF Bay Area Link to comment Share on other sites More sharing options...
wxeyeNH Posted July 21, 2018 Share Posted July 21, 2018 I don't know why the topic of the Bahama Blues interests me but it is really different than the clear, clean polar air masses. I remember it years ago right after Hurricane Gloria passed. People in the Boston area that evening were commenting on the fact that the airmass just looked and felt different. If it happens next week you'll know the feeling. Dews can be very high yet great visibility and that breezy feel of the deep tropics especially if we get the building white low base Cu's against the dark blue sky. Different feeling and look from the usual SW flows passing over the continent first... Link to comment Share on other sites More sharing options...
USCAPEWEATHERAF Posted July 21, 2018 Author Share Posted July 21, 2018 5 hours ago, RUNNAWAYICEBERG said: You haven’t been this excited since your 60” call for the cape in the March snowstorm. lol Link to comment Share on other sites More sharing options...
Damage In Tolland Posted July 21, 2018 Share Posted July 21, 2018 Head west young man head west. All the mesos say we see very little in SNE other than a few passing downpours tomorrow Link to comment Share on other sites More sharing options...
RUNNAWAYICEBERG Posted July 21, 2018 Share Posted July 21, 2018 1-2” is still good enough to tame the severe drought conditions. Link to comment Share on other sites More sharing options...
Hoth Posted July 21, 2018 Share Posted July 21, 2018 Can see the low just off the coast on satellite this morning. Looks like the best spinner risk would be down in Jersey? Nice combo of high theta-e, helicity and marginal instability tonight. Link to comment Share on other sites More sharing options...
Baroclinic Zone Posted July 21, 2018 Share Posted July 21, 2018 1 hour ago, RUNNAWAYICEBERG said: 1-2” is still good enough to tame the severe drought conditions. Nah, we meh. Link to comment Share on other sites More sharing options...
Damage In Tolland Posted July 21, 2018 Share Posted July 21, 2018 18 minutes ago, Baroclinic Zone said: Nah, we meh. Take all unders. We west Link to comment Share on other sites More sharing options...
Great Snow 1717 Posted July 21, 2018 Share Posted July 21, 2018 So now someone is predicting little to no rain?? What about the call for "thousands" of trees down??? Geez what a let down!! Link to comment Share on other sites More sharing options...
rimetree Posted July 21, 2018 Share Posted July 21, 2018 At least it's ushering in a change. With the exception of Tuesday, been pretty quiet around here. Link to comment Share on other sites More sharing options...
Sugarloaf1989 Posted July 21, 2018 Share Posted July 21, 2018 3 hours ago, RUNNAWAYICEBERG said: 1-2” is still good enough to tame the severe drought conditions. Tolland drought will continue. It's a magical place with twice normal snowfall in winter and sub-normal rainfall in summer. Link to comment Share on other sites More sharing options...
Sugarloaf1989 Posted July 21, 2018 Share Posted July 21, 2018 1 hour ago, Great Snow 1717 said: So now someone is predicting little to no rain?? What about the call for "thousands" of trees down??? Geez what a let down!! Landphoon cancal. Link to comment Share on other sites More sharing options...
ma blizzard Posted July 21, 2018 Share Posted July 21, 2018 as a whole - yeah the widespread heavy stuff looks to go west, but I'd watch out for a narrow zone that gets dumped on tmrw. Thinking there will be N-S oriented band of localized 2"-4"+ totals somewhere east of 91 for sure. Link to comment Share on other sites More sharing options...
Typhoon Tip Posted July 21, 2018 Share Posted July 21, 2018 what ... Little reality check ... no extreme scenarios were very likely from this interval of time, today through next Wednesday... Anyone "disappointed" by that reality now... I suspect they gave into the typical meme/self-reinforcing ... spontaneous delusional aspect of crowd noise. It's a fascinating phenomenon ... one quite endemic to this new technological forcing in human evolution - an internet run over by common heads given access to a public platform... wah wah waaaa Link to comment Share on other sites More sharing options...
OceanStWx Posted July 21, 2018 Share Posted July 21, 2018 17 hours ago, powderfreak said: Ahh very interesting guys. I honestly always thought it was the increasing water vapor in the boundary layer. So it's more the man-made crap from say the Ohio Valley and big urban areas like NYC/PHL, etc blowing in on S/SW winds? Where as the crisp air is just unmolested air from Canada? I guess I just always put it together like, hey the visibility is hazy and can't see past eastern VT hills, and MVL has a Td of 68F. Then other times it's like wow I can touch MWN and wave to the observatory... and MVL has a 42F dew. Just made that connection and assumed... It's really the size of the aerosols/particulates that matters. Typically the small aerosols in air scatter small wavelength light (blue) and that's what we see. The more you introduce pollutants, the more larger wavelengths are preferentially scattered. So in addition to the natural scattering of blue, you are adding more and more towards the red (which when combined creates a hazy white). Then towards sunset (or sunrise) the longer path length through the atmosphere scatters more reds to our eyes than blues. So your pollution or smokey sunsets are more colorful. Water vapor on the other hand would tend to absorb the longer (red) wavelengths, so it doesn't contribute nearly as much to the haze as pollutants do. Link to comment Share on other sites More sharing options...
OceanStWx Posted July 21, 2018 Share Posted July 21, 2018 It just so happens our high dew air mass come from the Gulf of Mexico, which is SW of us and an upstream pollution source. Link to comment Share on other sites More sharing options...
powderfreak Posted July 21, 2018 Share Posted July 21, 2018 47 minutes ago, OceanStWx said: It just so happens our high dew air mass come from the Gulf of Mexico, which is SW of us and an upstream pollution source. Gotcha. That makes sense. Thanks for the explanation from you, Tippy and Dendrite. Link to comment Share on other sites More sharing options...
#NoPoles Posted July 21, 2018 Share Posted July 21, 2018 Looks like that low coming up the coast is connected to the upper level low circulation centered over the great lakes. The moisture blob is def going way west steered by that UL circulation Link to comment Share on other sites More sharing options...
Typhoon Tip Posted July 21, 2018 Share Posted July 21, 2018 16 minutes ago, powderfreak said: Gotcha. That makes sense. Thanks for the explanation from you, Tippy and Dendrite. Ha ha ha.... yeah between the three of us, I think we really nailed it down huh Link to comment Share on other sites More sharing options...
TauntonBlizzard2013 Posted July 21, 2018 Share Posted July 21, 2018 Yeah, I’m not all that impressed by rain prospects for this area. Way west for the good stuff. Hoping we can score enough to wet the ground Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted July 21, 2018 Share Posted July 21, 2018 9 minutes ago, TauntonBlizzard2013 said: Yeah, I’m not all that impressed by rain prospects for this area. Way west for the good stuff. Hoping we can score enough to wet the ground Glad this evolution is taking place now, and not five months from now....Wiz would be firing up severe threads on Christmas eve. Link to comment Share on other sites More sharing options...
Typhoon Tip Posted July 21, 2018 Share Posted July 21, 2018 1 hour ago, 40/70 Benchmark said: Glad this evolution is taking place now, and not five months from now....Wiz would be firing up severe threads on Christmas eve. Ha ha! I joked about this very same thing .... This thread had days of lies up our fannies ...now, so deep inland that by the time that gets to our latitudes, ...it's really not even a closed entity... I mean it is, but it isn't... Link to comment Share on other sites More sharing options...
Damage In Tolland Posted July 21, 2018 Share Posted July 21, 2018 3 hours ago, Typhoon Tip said: Ha ha ha.... yeah between the three of us, I think we really nailed it down huh Shh. Don’t tell 1717. Dude is thinking big results lol Link to comment Share on other sites More sharing options...
amarshall Posted July 21, 2018 Share Posted July 21, 2018 Channel 5 come on. "This is one of those cases where you may want to keep your phone handy next to your bed and have your alerts turned on," Burnett said. Link to comment Share on other sites More sharing options...
Yester Posted July 22, 2018 Share Posted July 22, 2018 Sitting here in the middle of RI...weathermen keep mentioning the chance of a spinup overnight/tomorrow morning...but they usually don’t even mention it when we are at a marginal risk. Big chance? Link to comment Share on other sites More sharing options...
Baroclinic Zone Posted July 22, 2018 Share Posted July 22, 2018 33 minutes ago, Yester said: Sitting here in the middle of RI...weathermen keep mentioning the chance of a spinup overnight/tomorrow morning...but they usually don’t even mention it when we are at a marginal risk. Big chance? Big chance? No. I think we've had such minimal severe threats this year, they are just making sure to get the SPC message across. Link to comment Share on other sites More sharing options...
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