ORH_wxman Posted October 23, 2014 Share Posted October 23, 2014 Classic downslope dryslot over Tolland Was thinking the same thing...total screwjob there, lol. Link to comment Share on other sites More sharing options...
Ginx snewx Posted October 23, 2014 Share Posted October 23, 2014 nice Beantown clearing shot Link to comment Share on other sites More sharing options...
dryslot Posted October 23, 2014 Share Posted October 23, 2014 Here are storm total rainfall images from KBOX, large view and Boston zoom-in. Wasn't this heavy stuff supposed to be at Portland Maine?? 2014_10_23_1354z_KBOX_storm_total2.jpg 2014_10_23_1354z_KBOX_storm_total3.jpg Yes Link to comment Share on other sites More sharing options...
apm Posted October 23, 2014 Share Posted October 23, 2014 Boundary layer mixing as rain stopped. Why is that? I would have guessed it would be the opposite? Link to comment Share on other sites More sharing options...
powderfreak Posted October 23, 2014 Share Posted October 23, 2014 Here are storm total rainfall images from KBOX, large view and Boston zoom-in. Wasn't this heavy stuff supposed to be at Portland Maine?? 2014_10_23_1354z_KBOX_storm_total2.jpg lol yes. But man no downslope issues in the CT valley of Mass...only the NE flow downslope of I-84 in CT off the southern ORH hills. Link to comment Share on other sites More sharing options...
CT Rain Posted October 23, 2014 Share Posted October 23, 2014 Classic downslope dryslot over Tolland Looks like a precursor to winter with the classic NE CT downslope. Link to comment Share on other sites More sharing options...
Great Snow 1717 Posted October 23, 2014 Share Posted October 23, 2014 LWM ....more than 3 inches since midnight. And still pouring buckets. Sky has brightened somewhat in the last 15 minutes. Link to comment Share on other sites More sharing options...
dryslot Posted October 23, 2014 Share Posted October 23, 2014 lol yes. But man no downslope issues in the CT valley of Mass...only the NE flow downslope of I-84 in CT off the southern ORH hills. We will get some leftovers up here, This one closed off further south so it is more of an open wave up here, Not to say we don't see more qpf but i don't see it to the extremes it was last night further south with the convection Link to comment Share on other sites More sharing options...
radarman Posted October 23, 2014 Share Posted October 23, 2014 Are winds more NE in the lowest 2-4kft? I'm always fascinated in the minute details of why some east flow events cause such a downslope problem while others are no issue. Yeah. Hard to say. In some cases, like Feb 2013 and the Octobomb for example I think it's just a matter of lucking out with a well placed N-S deformation band that ignores terrain to some extent, perhaps with a standard deduction compared to the surroundings. The tightly wound, stacked up nuke S of LI seems to be the worst for real downsloping but it's mostly anecdotal. Last night we might have got some enhancement from that bent back front shown in the sat pic. Link to comment Share on other sites More sharing options...
MarkO Posted October 23, 2014 Share Posted October 23, 2014 I envision flood watches for medium size rivers (Ipswich, Shawsheen, Concord, etc...) at about 50 year events being posted for tonight tomorrow in Essex, Middlesex Counties. That's what 6" of rain will do: http://weather.cod.edu/satrad/nexrad/index.php?type=BOX-N0Q-1-96 Link to comment Share on other sites More sharing options...
CoastalWx Posted October 23, 2014 Share Posted October 23, 2014 Why is that? I would have guessed it would be the opposite? The LLJ is still there, but you lose the cooling effect of precipitation. Sometimes rains have strong winds at the onset of heavy bands, but then go almost calm while in the middle of it. I also noticed the winds increase a bit on the VAD profile at the TDWR. Link to comment Share on other sites More sharing options...
Ginx snewx Posted October 23, 2014 Share Posted October 23, 2014 Backside gusts to 50 according to BOX Link to comment Share on other sites More sharing options...
TalcottWx Posted October 23, 2014 Share Posted October 23, 2014 I was going to comment yesterday when you mentioned the convection that was firing around NJ, That can work in a couple different ways and most of the time i know up here it has been in a negative one The hires models were a disaster for a time early yesterday. Actually handled things poorly. Had to wait a few hours as the little features of the storm got going before they had any clue. Link to comment Share on other sites More sharing options...
ORH_wxman Posted October 23, 2014 Share Posted October 23, 2014 Yeah. Hard to say. In some cases, like Feb 2013 and the Octobomb for example I think it's just a matter of lucking out with a well placed N-S deformation band that ignores terrain to some extent, perhaps with a standard deduction compared to the surroundings. The tightly wound, stacked up nuke S of LI seems to be the worst for real downsloping but it's mostly anecdotal. Last night we might have got some enhancement from that bent back front shown in the sat pic. There was some elevated instability driving some of the heavier precip last night as well (this is why we had thunderstorms embedded) which isn't affected as much by terrain. To get the real CT Valley screwjobs, we typically are looking for a more deep layer ENE flow in the boundary layer up to around 850mb with frontogenetical forcing at a minimum...that is when the terrain will be most efficient. Link to comment Share on other sites More sharing options...
TalcottWx Posted October 23, 2014 Share Posted October 23, 2014 So, we just went from driving rain, big gusts... to crystal blue skies without a cloud around... to low level clouds flying in with coastal enhanced rain/mist/whatever firing up on radar.. in the past hour. Gotta love it. Link to comment Share on other sites More sharing options...
Ginx snewx Posted October 23, 2014 Share Posted October 23, 2014 Backside gusts to 50 according to BOX Link to comment Share on other sites More sharing options...
Ginx snewx Posted October 23, 2014 Share Posted October 23, 2014 Link to comment Share on other sites More sharing options...
Typhoon Tip Posted October 23, 2014 Share Posted October 23, 2014 nice Beantown clearing shot Just arrived here in along Rt 2 east of Fitchburg... Brightened and actual splashes of sun now... Dry slot punching west -- this is a seriously core wrapped mongrel. I was thinking ... though we have had some impressive winters (some ...less so) over recent years, we haven't really witnessed one of those good old slow crawling closed low menace. Everything seems to be progressive. That last serious cut off monster I remember was 1997 ...though some may find those in the annals there were close. 1992, 1997... 1978...etc... Seems there's something about the atmospheric integration of mechanics overall that favors some years for hornet stings and other years of transient bombs... Interesting Link to comment Share on other sites More sharing options...
radarman Posted October 23, 2014 Share Posted October 23, 2014 Coming down really heavily again, though the back edge of this band seems to be moving west pretty quickly. Wonder if it stalls out over the Berks and then backs eastward or just fizzles? Link to comment Share on other sites More sharing options...
Damage In Tolland Posted October 23, 2014 Author Share Posted October 23, 2014 How is that a DSD? It's a Dryslit that is moving west shutting the rain off most everywhere that I mentioned earlier. And was assured it would rain all day Link to comment Share on other sites More sharing options...
CoastalWx Posted October 23, 2014 Share Posted October 23, 2014 How is that a DSD? It's a Dryslit that is moving west shutting the rain off most everywhere that I mentioned earlier. And was assured it would rain all day Nobody said constant all day. I said it wouldn't dry out and it isn't. Drizzle with some sct rains later. Link to comment Share on other sites More sharing options...
weathafella Posted October 23, 2014 Share Posted October 23, 2014 Lol....mpm with >3 per radarscope. Shelburne Falls right? Link to comment Share on other sites More sharing options...
CoastalWx Posted October 23, 2014 Share Posted October 23, 2014 Lol....mpm with >3 per radarscope. Shelburne Falls right? Beware radar est amounts on the edges of the radar. Sometimes it's too high. Link to comment Share on other sites More sharing options...
Damage In Tolland Posted October 23, 2014 Author Share Posted October 23, 2014 Nobody said constant all day. I said it wouldn't dry out and it isn't. Drizzle with some sct rains later.Jay did. Should be able to blow some leaves this afternoon in CT Link to comment Share on other sites More sharing options...
Brian5671 Posted October 23, 2014 Share Posted October 23, 2014 models did well predicting the I-84 CT screwgie. Link to comment Share on other sites More sharing options...
TalcottWx Posted October 23, 2014 Share Posted October 23, 2014 Jay did. Should be able to blow some leaves this afternoon in CT My post from 8:30am : "We have this dryslot move in now with a lull, but another plume of moisture arrives near the cape and islands this afternoon and brings another round of rain to eastern mass. 12z hrrr has it. 12z rap does to. Worst is well over, just looks to be additional rainfall." Link to comment Share on other sites More sharing options...
dendrite Posted October 23, 2014 Share Posted October 23, 2014 Here are storm total rainfall images from KBOX, large view and Boston zoom-in. Wasn't this heavy stuff supposed to be at Portland Maine?? 2014_10_23_1354z_KBOX_storm_total2.jpg 2014_10_23_1354z_KBOX_storm_total3.jpg PWM has had almost 3"...not bad. Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted October 23, 2014 Share Posted October 23, 2014 Beware radar est amounts on the edges of the radar. Sometimes it's too high. 2" in Hubbardston since midnight, but I am further east Link to comment Share on other sites More sharing options...
MainePhotog Posted October 23, 2014 Share Posted October 23, 2014 Loud, rolling thunder here at work in South Portland, ME. Link to comment Share on other sites More sharing options...
weathafella Posted October 23, 2014 Share Posted October 23, 2014 New rain elements are gathering off the coast for another round this afternoon it seems. Link to comment Share on other sites More sharing options...
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