Rainshadow Posted August 27, 2021 Report Share Posted August 27, 2021 Previous thread just hit 50 pages and it ended with some beautiful photos by @CyphaPSU. So it is time to start a new thread. 72F and still humid in Mount Laurel. 3 Link to comment Share on other sites More sharing options...
ACwx Posted August 27, 2021 Report Share Posted August 27, 2021 Feels like I'm on the island in Jurassic Park. 12 hours of keg stand-worthy dews according to @tombo82685 2 Link to comment Share on other sites More sharing options...
Parsley Posted August 27, 2021 Report Share Posted August 27, 2021 Who’s ready to party?…. 6 Link to comment Share on other sites More sharing options...
PreserveJon Posted August 27, 2021 Report Share Posted August 27, 2021 Forecast high temps in the 70s and lows in the 50s next week is nearly bringing tears to my eyes. (I am outside the CWA.) Link to comment Share on other sites More sharing options...
chescowx Posted August 27, 2021 Report Share Posted August 27, 2021 Link to comment Share on other sites More sharing options...
chescowx Posted August 27, 2021 Report Share Posted August 27, 2021 The heat index in Sea Isle City NJ was 107 degrees at 1030am - highest ever on the station since 2016 - sea breeze front just passed the house and temps have fallen from 89.5 to 85.6 over last 7 minutes Link to comment Share on other sites More sharing options...
Seanvolz98 Posted August 27, 2021 Report Share Posted August 27, 2021 I’d love to know how many times this set up has happened this year. This strip shows up on the eastern side of Philly and stretches up towards Trenton. Unreal that this keeps happening 2 Link to comment Share on other sites More sharing options...
Rainshadow Posted August 27, 2021 Author Report Share Posted August 27, 2021 Thundering in Mount Laurel and sunny. Link to comment Share on other sites More sharing options...
iceman56 Posted August 27, 2021 Report Share Posted August 27, 2021 God awful out, was 88.4/78 earlier, got some clouds and it went down 86.4/77, now bright sun again. See a boomer just west of Exton, south of here. Time to mow and sweat... Heading north Sunday to days in the upper 60s/low 70s for the next week and color in trees - can't wait. 1 Link to comment Share on other sites More sharing options...
colonel_kurtz Posted August 27, 2021 Report Share Posted August 27, 2021 Rain / thunder along the river in Bensalem Rinse, wash, repeat repeat repeat....... Link to comment Share on other sites More sharing options...
frankdp23 Posted August 27, 2021 Report Share Posted August 27, 2021 Perfect week in OBX. Not one drop of rain and sunny. Ocean was 82 and surprisingly very clear. 8 Link to comment Share on other sites More sharing options...
SalemCountyNJ Posted August 27, 2021 Report Share Posted August 27, 2021 94 / 77 - just lovely outside.. Link to comment Share on other sites More sharing options...
Chubbs Posted August 27, 2021 Report Share Posted August 27, 2021 Slow storm motion today - some will get pounded National Weather Service Mount Holly NJ 152 PM EDT Fri Aug 27 2021 The National Weather Service in Mount Holly NJ has issued a * Severe Thunderstorm Warning for... Central Chester County in southeastern Pennsylvania... * Until 245 PM EDT. * At 152 PM EDT, a severe thunderstorm was located over Downingtown, or near West Chester, and is nearly stationary. Link to comment Share on other sites More sharing options...
ACwx Posted August 27, 2021 Report Share Posted August 27, 2021 58 minutes ago, Seanvolz98 said: I’d love to know how many times this set up has happened this year. This strip shows up on the eastern side of Philly and stretches up towards Trenton. Unreal that this keeps happening As crazy as it sounds, considering the orientation with respect to the city, I think it's possible that Philly itself is causing these storms. Dr. Marshall Shepherd has been studying this phenomenon for a long time around Atlanta and concludes that urban areas absolutely can have an influence on thunderstorm formation during the summer. The urban heat island effect provides a warmer environment that its surroundings, making it easier for air to rise. Rising air can also come from air being forced to go over the tall buildings, and the pollution can lead to the formation of cloud droplets. You can see how in the Atlanta rainfall chart attached, the highest rainfall is shown downwind of the city. With winds coming from the SW today, same thing is happening near Philly. You can read a full summary below. https://www.atlantastudies.org/2017/07/20/j-marshall-shepherd-does-atlanta-create-its-own-rainstorms/ 3 Link to comment Share on other sites More sharing options...
Seanvolz98 Posted August 27, 2021 Report Share Posted August 27, 2021 4 minutes ago, ACwx said: As crazy as it sounds, considering the orientation with respect to the city, I think it's possible that Philly itself is causing these storms. Dr. Marshall Shepherd has been studying this phenomenon for a long time around Atlanta and concludes that urban areas absolutely can have an influence on thunderstorm formation during the summer. The urban heat island effect provides a warmer environment that its surroundings, making it easier for air to rise. Rising air can also come from air being forced to go over the tall buildings, and the pollution can lead to the formation of cloud droplets. You can see how in the Atlanta rainfall chart attached, the highest rainfall is shown downwind of the city. With winds coming from the SW today, same thing is happening near Philly. You can read a full summary below. https://www.atlantastudies.org/2017/07/20/j-marshall-shepherd-does-atlanta-create-its-own-rainstorms/ Very interesting read, had no idea large buildings in city centers could cause turbulent airflow and force it to rise due to the urban heat island effect. I’m sure more and more articles will be published on this in the future as it becomes more pronounced 1 Link to comment Share on other sites More sharing options...
iceman56 Posted August 27, 2021 Report Share Posted August 27, 2021 1 hour ago, Chubbs said: Slow storm motion today - some will get pounded National Weather Service Mount Holly NJ 152 PM EDT Fri Aug 27 2021 The National Weather Service in Mount Holly NJ has issued a * Severe Thunderstorm Warning for... Central Chester County in southeastern Pennsylvania... * Until 245 PM EDT. * At 152 PM EDT, a severe thunderstorm was located over Downingtown, or near West Chester, and is nearly stationary. It's now 3:00 and it's barely moved. Gave me some nice outflow breezes and dropped the DP to 69 briefly. Link to comment Share on other sites More sharing options...
Rainshadow Posted August 27, 2021 Author Report Share Posted August 27, 2021 25 minutes ago, iceman56 said: It's now 3:00 and it's barely moved. Gave me some nice outflow breezes and dropped the DP to 69 briefly. There are intersecting outflow boundaries in Burlington and Ocean Counties. I know it doesn’t help you much, but cool to see. Link to comment Share on other sites More sharing options...
Chubbs Posted August 27, 2021 Report Share Posted August 27, 2021 1 minute ago, Rainshadow101 said: There are intersecting outflow boundaries in Burlington and Ocean Counties. I know it doesn’t help you much, but cool to see. Here's a sat pic showing the outflow and other boundaries. Link to comment Share on other sites More sharing options...
cbelke Posted August 27, 2021 Report Share Posted August 27, 2021 3 minutes ago, Rainshadow101 said: There are intersecting outflow boundaries in Burlington and Ocean Counties. I know it doesn’t help you much, but cool to see. You mean these outflow boundaries? Along the red lines I drew. Link to comment Share on other sites More sharing options...
Parsley Posted August 27, 2021 Report Share Posted August 27, 2021 Day 20 of 90+ IMBY. While surely inflated a bit, a maximim dewpoint of 79.1 earlier today on my Tempest. 1 Link to comment Share on other sites More sharing options...
cbelke Posted August 27, 2021 Report Share Posted August 27, 2021 2 minutes ago, Parsley said: Day 20 of 90+ IMBY. While surely inflated a bit, a maximim dewpoint of 79.1 earlier today on my Tempest. My VP2 hit 81 for the DP here. Down to 78 DP. Link to comment Share on other sites More sharing options...
Chubbs Posted August 27, 2021 Report Share Posted August 27, 2021 22 minutes ago, cbelke said: You mean these outflow boundaries? Along the red lines I drew. Could be, need to see an animation. There are several storm outflow boundaries in our area. The Downingtown storm is responsible for the clearing in Chesco/SePa in the pic I posted. 1 Link to comment Share on other sites More sharing options...
cbelke Posted August 27, 2021 Report Share Posted August 27, 2021 14 minutes ago, Chubbs said: Could be, need to see an animation. There are several storm outflow boundaries in our area. The Downingtown storm is responsible for the clearing in Chesco/SePa in the pic I posted. So you don't necessarily look at radar for the outflow? Link to comment Share on other sites More sharing options...
Chubbs Posted August 27, 2021 Report Share Posted August 27, 2021 92.3 high. Peak heat index was 110 - 90.7 with 80.8 dp (could be high) Link to comment Share on other sites More sharing options...
Chubbs Posted August 27, 2021 Report Share Posted August 27, 2021 Just now, cbelke said: So you don't necessarily look at radar for the outflow? Radar or satellite both work. Easy to see on todays satellite loop. Would post but its a large file. 1 Link to comment Share on other sites More sharing options...
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