FortySixAnd32 Posted June 29, 2022 Share Posted June 29, 2022 18 minutes ago, ClicheVortex2014 said: nice loop with velocities That was an insane Friday for sure!!! 1 1 Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 29, 2022 Author Meteorologist Share Posted June 29, 2022 (edited) 3 hours ago, FortySixAnd32 said: That was an insane Friday for sure!!! One of my favorite day 1 outlooks/verifications. If not my favorite. This was the first day 1 outlook for 6/29/12. SPC did the best they could with the information they had... certainly not unusual to have a surprise MCS pop up out of nowhere on the models <12 hours in advance. The same outlook minus the reports The second day 2 outlook was also pretty classic. Of course, now all of us in the region know when a marginal or slight risk is oriented like this, especially with NW flow, that's a big red flag. Edited June 29, 2022 by ClicheVortex2014 1 Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 29, 2022 Author Meteorologist Share Posted June 29, 2022 Today's one of those days. Western Nebraska: 1 Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 29, 2022 Author Meteorologist Share Posted June 29, 2022 (edited) In case anyone is wondering what the hell is going on... model approximated sounding in the area. Very tall mixed layer, very tall inverted-V sounding. Any rain that develops and starts to fall will immediately evaporate, causing a very strong downdraft. 10.8 C/km 0-3km lapse rates. Beyond super adiabatic. In other words, the environment cools faster than the unsaturated air parcel (cools at 10 C/km). The entire 0-3km layer is superadiabatic. It's pretty unusual to have that east of the Rockies, and even more so when rain is able to develop. Normally you need an air parcel to become saturated in order to create any meaningful instability because the rate at which a saturated air parcel cools is far, far less (~6.5 C/km compared to 10 C/km), so it's much easier for the environment to cool quicker than the air parcel. Edited June 29, 2022 by ClicheVortex2014 1 1 Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 29, 2022 Author Meteorologist Share Posted June 29, 2022 Looks like that was a freak event where some rain developed, produced a gust front, and forced some more rain. But that wasn't sustainable. Gust front is still visible but no longer severe worthy Link to comment Share on other sites More sharing options...
junior Posted June 29, 2022 Share Posted June 29, 2022 3 hours ago, FortySixAnd32 said: That was an insane Friday for sure!!! Yep was very memorable here. Lots of trees were downed. Definitely the strongest straight line winds I've experienced. Pure whiteout when it hit. 1 Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 29, 2022 Author Meteorologist Share Posted June 29, 2022 (edited) 17 minutes ago, junior said: Yep was very memorable here. Lots of trees were downed. Definitely the strongest straight line winds I've experienced. Pure whiteout when it hit. Unfortunately I don't remember experiencing the derecho. Must not have been that strong in West Chester because I surely remember Hurricane Ike. I doubt I'll ever experience something that compares to that. Edited June 29, 2022 by ClicheVortex2014 2 Link to comment Share on other sites More sharing options...
1816 Posted June 29, 2022 Share Posted June 29, 2022 I don't know but I don't think it was expected to cross the mountains. Definitely caught me by surprise here in VA. I went out of town and when I got back my whole porch was destroyed. Was without power for about a week and unfortunately that was the hottest week I can remember. Almost 100 every day. The only place cool enough to be bearable was the unfinished basement so that's where we slept. Or tried to sleep anyway. Whole house felt like an oven above basement level. 1 Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 29, 2022 Author Meteorologist Share Posted June 29, 2022 3 minutes ago, 1816 said: I don't know but I don't think it was expected to cross the mountains. Definitely caught me by surprise here in VA. I went out of town and when I got back my whole porch was destroyed. Was without power for about a week and unfortunately that was the hottest week I can remember. Almost 100 every day. The only place cool enough to be bearable was the unfinished basement so that's where we slept. Or tried to sleep anyway. Whole house felt like an oven above basement level. Yeah typically MCSs don't sustain very well as they cross mountains. That's part of what made this derecho extraordinary... it really didn't lose much strength. Owes to the strength of the MCS and how well matured it was before it approached the Appalachians. 2 Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 29, 2022 Author Meteorologist Share Posted June 29, 2022 2200 downdraft cape in NE SD per mesoanalysis. Highest observed downdraft cape sounding in the area was 2227. Of course, mesoanalysis =/= observed. We'll see what the 0z suite says. 1 Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 30, 2022 Author Meteorologist Share Posted June 30, 2022 1 hour ago, ClicheVortex2014 said: 2200 downdraft cape in NE SD per mesoanalysis. Highest observed downdraft cape sounding in the area was 2227. Of course, mesoanalysis =/= observed. We'll see what the 0z suite says. Fell short of the record by quite a bit. The lack of an inverted-V and the very brief inversions contributed to this. Link to comment Share on other sites More sharing options...
junior Posted June 30, 2022 Share Posted June 30, 2022 2 hours ago, 1816 said: I don't know but I don't think it was expected to cross the mountains. Definitely caught me by surprise here in VA. I went out of town and when I got back my whole porch was destroyed. Was without power for about a week and unfortunately that was the hottest week I can remember. Almost 100 every day. The only place cool enough to be bearable was the unfinished basement so that's where we slept. Or tried to sleep anyway. Whole house felt like an oven above basement level. We went camping in WV a week after the derecho and a lot of areas were still w/o power. No ice/ac and a heat wave... was horrible. The white water rafting was our only relief. 1 1 Link to comment Share on other sites More sharing options...
StormfanaticInd Posted June 30, 2022 Share Posted June 30, 2022 Next week looks active mcs wise Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 30, 2022 Author Meteorologist Share Posted June 30, 2022 Gonna set the end date of this thread for today (June 30). New severe weather regime will begin, especially next week. 1 Link to comment Share on other sites More sharing options...
Guest Posted June 30, 2022 Share Posted June 30, 2022 1 hour ago, ClicheVortex2014 said: Fell short of the record by quite a bit. The lack of an inverted-V and the very brief inversions contributed to this. Were calling for 80mph gusts with isolated storms. Kind of fizzled so far. Link to comment Share on other sites More sharing options...
Meteorologist ClicheVortex2014 Posted June 30, 2022 Author Meteorologist Share Posted June 30, 2022 3 minutes ago, SoDakFarmer said: Were calling for 80mph gusts with isolated storms. Kind of fizzled so far. IMO, they had good reason to suggest that potential. It's a pretty strange setup though. Link to comment Share on other sites More sharing options...
Guest Posted June 30, 2022 Share Posted June 30, 2022 There did end up being some t storm and non t storm wind gusts on the storm reports. Looks like 68mph was the top for both at ABR Link to comment Share on other sites More sharing options...
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