Parade of outflow boundaries! ⛈ Rain-cooled air from thunderstorms (its downdraft) is crashing to the ground and spreading out (the outflow boundary). With no prevalent wind today, these outflows are thriving. We’ve been seeing these on radar today, which show up as faint lines racing away from the spotty thunderstorms. On a humid day like today, all that extra moisture helps strengthen the downdraft, making the outflow even more noticeable. These boundaries can cause a quick wind shift, a drop
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Parade of outflow boundaries! ⛈ Rain-cooled air from thunderstorms (its downdraft) is crashing to the ground and spreading out (the outflow boundary). With no prevalent wind today, these outflows are thriving. We’ve been seeing these on radar today, which show up as faint lines racing away from the spotty thunderstorms. On a humid day like today, all that extra moisture helps strengthen the downdraft, making the outflow even more noticeable. These boundaries can cause a quick wind shift, a drop
4.8K views10 months ago
FacebookBlake Hansen
Here is my explainer on outflow boundaries and summer storms in case you missed it at 5 PM! Outflow boundaries are a wave of relatively cooler air that rushes out of thunderstorms as they collapse! Basically these act as small scale cold fronts! In this case it has sent the temperature at Little Rock from 94 back into the 80s! These boundaries can also initiate new storms which we see tons of this time of year! | Meteorologist James Bryant
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Here is my explainer on outflow boundaries and summer storms in case you missed it at 5 PM! Outflow boundaries are a wave of relatively cooler air that rushes out of thunderstorms as they collapse! Basically these act as small scale cold fronts! In this case it has sent the temperature at Little Rock from 94 back into the 80s! These boundaries can also initiate new storms which we see tons of this time of year! | Meteorologist James Bryant
4K views10 months ago
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What is an outflow boundary?
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What is an outflow boundary?
Mar 27, 2019
ABC7 ChicagoLarry Mowry
⛈Here's a little bit of outflow boundary magic out in the panhandle of Texas from this evening! When a thunderstorm pulses downward or collapses, rain-cooled air will rush towards the surface and spread out in all directions. Those thin green lines that you see on radar aren't precipitation, it's actually debris and other small particles! What you're seeing here on radar is two outflow boundaries colliding and rapidly forming new thunderstorms. You can think of it like this--when you press the f
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⛈Here's a little bit of outflow boundary magic out in the panhandle of Texas from this evening! When a thunderstorm pulses downward or collapses, rain-cooled air will rush towards the surface and spread out in all directions. Those thin green lines that you see on radar aren't precipitation, it's actually debris and other small particles! What you're seeing here on radar is two outflow boundaries colliding and rapidly forming new thunderstorms. You can think of it like this--when you press the f
1.6K viewsMay 16, 2024
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What’s an outflow boundary, and how does it spark storms? #weather #aviation #learntofly #thunderstorms #privatepilot #instrumentpilot #instrumentpilottraining | Boldmethod
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What’s an outflow boundary, and how does it spark storms? #weather #aviation #learntofly #thunderstorms #privatepilot #instrumentpilot #instrumentpilottraining | Boldmethod
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Over the Gulf, and just west of Florida, thunderstorms form on the outflow boundaries of previous storms. | Cooperative Institute for Research in the Atmosphere
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Over the Gulf, and just west of Florida, thunderstorms form on the outflow boundaries of previous storms. | Cooperative Institute for Research in the Atmosphere
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4:43pm Another amazing example of how outflow boundaries can trigger new thunderstorms — just wait for the last couple of frames… …and then KABLAMO 💥 lol | Denver & Front Range Weather
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4:43pm Another amazing example of how outflow boundaries can trigger new thunderstorms — just wait for the last couple of frames… …and then KABLAMO 💥 lol | Denver & Front Range Weather
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🌩️ Check out what happens when two outflow boundaries collide! This explosive thunderstorm near Clemson (looking eastbound) was triggered as two boundaries slammed together — and you can clearly see it on radar. ⚠️ I’m tracking it all for you — stay tuned for more updates! | Chris Justus, WYFF 4 Chief Meteorologist
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Textbook outflow boundaries colliding to ignite a severe thunderstorm. Just awesome to see. #pueblo #pikespeak #coax #coloradosprings #colorado | Colorado Storm Chasers
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Post Date: 6.28.25 What happens when not one? not two? but THREE outflow boundaries collide? EXPLOSIVE thunderstorm development. You can see a weak cell sitting near Horn Lake slowly start to encounter more forcing until it finally explodes as the boundaries undercut it! Really cool science at work here! | North Mississippi Storm Chasers & Spotters
139.5K views10 months ago
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Boom! 💥 Outflow boundaries (wind blowing out of thunderstorms) colliding to make more ⛈️⛈️ | FOX 13's Paul Dellegatto
24.2K viewsAug 23, 2024
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So many outflow boundaries out there kicking off more storms. ⛈️ | Meteorologist Brandon Lawson
24 viewsJul 14, 2023
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Outflow boundaries collide and provide the lift for a big bust of lightning, storm is fading quickly now. I drew in the outflow for you in the white lines so you can follow along. | Meteorologist Ross Whitley
2.6K viewsJul 14, 2021
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Outflow boundaries, this is called and Undular Bore. These boundaries were created by storms to our north this morning. The boundaries combined with the surface front help undercut our convection and limit today's severe weather. ~Chief Ross | Meteorologist Ross Whitley
858 viewsMar 4, 2020
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Holy outflow boundaries, Batman! Three way outflow boundary collision just east of Three Way, Arkansas! ⛈⚡️💨 | US National Weather Service Memphis Tennessee
9.9K viewsJun 1, 2022
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What is an outflow boundary?
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YouTubeWWLTV
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There are several outflow boundaries (thin circular bands extending from the thunderstorms) are intersecting with each other and sparking new storms. These are not particularly strong, maybe 40 MPH winds & pea sized hail, but the rain rates are very fast. Flooding is our main concern for the Memphis metro. There's also frequent lightning so if you're doing outdoor activities in Memphis, have a place to take shelter! ⛈️ | US National Weather Service Memphis Tennessee
23.2K views9 months ago
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So far tonight, outflow boundaries have triggered thunderstorms that are isolated to the I-76 corridor. When we are dealing with microscale meteorology in real time, the forecast model data in particular, the convective allowing models, are basically useless. So I’m left up to my own discretion & experience to guide you through the nowcasting process as best as I can. I want to see how these boundaries behave once they get to the foothills. I’ll keep you posted. K bye! | Denver & Front Range Wea
45.5K viewsJun 15, 2024
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Watch how the outflow boundaries (little blue lines) interact and collide with one another to create new storms. CLICK FOR AUDIO NARRATION AND DETAILS. | WKRN Davis Nolan
3.8K views10 months ago
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HOLY OUTFLOW BOUNDARIES, BATMAN! Check out all the outflow boundaries being created by storms around Alexandra, LA! The one between Alexandria and Ft. Polk is almost a perfect circle! Outflow boundaries are the leading edges of the rain cooled air that pushes away from storms and show up very prominently on radar in the summertime. | Meteorologist Jeff Castle
1.5K viewsJul 13, 2021
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Learn more about outflow boundaries in this First Warning Weather University lesson. | KXAN News
1.3K viewsJun 6, 2024
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3:31
What is an outflow boundary?
Jul 13, 2021
khou.com
2:00
Radar Expert: How To Spot an Outflow Boundary?
Jul 22, 2022
The Weather ChannelRob Shackelford
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Outflow boundaries are a huge part of the weather along the Gulf Coast of South Florida. Finding them and then anticipating where they will collide can help you determine where things turn stormy next. Gulf Coast News | Rob Duns
698 views9 months ago
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2:14
What is an Outflow Boundary?
9 months ago
MSNKXRM Colorado Springs
1:45
Sunny to stormy in 30 minutes: The science behind outflow boundary collisions in Colorado
126 views10 months ago
YouTubeKOAA 5
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Merging outflow boundaries are leading to robust storm development across NE Logan and SW McLean Counties. Bloomington/Normal and southern portions of McLean County should anticipate periods of torrential rain, frequent lightning, and locally strong wind gusts. Posted 4:19 pm 8/12/25 | Meteorologist Chris Yates
2.6K views9 months ago
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Outflow boundaries give and sometimes they take. Outflow diving south but is undercutting the instability leading to stable conditions but it’s also lowering temps. | Meteorologist Ross Whitley
153 viewsAug 8, 2023
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Wow, here is a neat radar loop of two outflow boundaries smacking into each from opposite directions over Channing, TX. The result is initiation of storms along the collision axis. (Updated version of prior post) | Texas Storm Chasers
851.6K views10 months ago
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[Aug 29, 6:15PM]: Outflow boundaries are propagating southward from North Idaho and NE WA. Wind gusts 20-30 mph have been observed with these boundaries. | US National Weather Service Spokane Washington
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