Amelia Urquhart 🏳️⚧️
@ameliaurquhart.bsky.social
(she/her) 🏳️⚧️🏳️🌈. Storm chaser and astrophotographer. Chase Archive team member. Cat mom. Oklahoma’s transgender menace. F 💞 ²⁰²⁴⁻¹⁰⁻⁰⁸.🌪️- 18 🌌 - 7
💻: https://github.com/a-urq
📸: https://amelia-urquhart.darkroom.com
💻: https://github.com/a-urq
📸: https://amelia-urquhart.darkroom.com
For my senior project, I've been making a model that forecasts the short-term probability of Convective Initiation. It's not available to the public yet, but I plan on open-sourcing it and making a real-time product using this model sometime in the near future.
November 19, 2025 at 1:01 AM
For my senior project, I've been making a model that forecasts the short-term probability of Convective Initiation. It's not available to the public yet, but I plan on open-sourcing it and making a real-time product using this model sometime in the near future.
When all you see is a stable green band, it can be hard to trust that the substorm is coming. Often, the long wait is just a charge-up that makes the show even more spectacular.
November 14, 2025 at 8:13 AM
When all you see is a stable green band, it can be hard to trust that the substorm is coming. Often, the long wait is just a charge-up that makes the show even more spectacular.
I’ll still be telling people about last night decades from now.
November 13, 2025 at 6:01 AM
I’ll still be telling people about last night decades from now.
Ladies, gentlemen, and others, this is what it was all for. This is what every time we’ve spent on the side of a frigid dirt road with stubborn +25 Bz was for. This is what every single time we watched the CME impact at 7:00 AM was for.
November 12, 2025 at 5:47 AM
Ladies, gentlemen, and others, this is what it was all for. This is what every time we’ve spent on the side of a frigid dirt road with stubborn +25 Bz was for. This is what every single time we watched the CME impact at 7:00 AM was for.
Steam devils at sunrise, over Lake Thunderbird early this morning
November 10, 2025 at 9:02 PM
Steam devils at sunrise, over Lake Thunderbird early this morning
It is wild how far a little bit of careful, intentional color grading can get you
November 10, 2025 at 8:14 PM
It is wild how far a little bit of careful, intentional color grading can get you
I’m running on three hours of sleep and the wonder of nature baby
November 10, 2025 at 2:20 PM
I’m running on three hours of sleep and the wonder of nature baby
I work hard enough, I can give my code files silly names.
October 29, 2025 at 10:28 PM
I work hard enough, I can give my code files silly names.
Hurricane Melissa's extreme Category 5 eyewall, rapid core disintegration over Jamaica, and subsequent rapid reintensification on approach to southeastern Cuba. Landfall is ongoing 20 mi/32 km west of Santiago de Cuba.
October 29, 2025 at 7:14 AM
Hurricane Melissa's extreme Category 5 eyewall, rapid core disintegration over Jamaica, and subsequent rapid reintensification on approach to southeastern Cuba. Landfall is ongoing 20 mi/32 km west of Santiago de Cuba.
The clock has just about run out on Melissa’s restrengthening period as its eyewall approaches the Sierra Maestra mountains. Even though it’s still extremely dangerous, I’m happy to see it didn’t intensify as much as I feared it would.
October 29, 2025 at 6:00 AM
The clock has just about run out on Melissa’s restrengthening period as its eyewall approaches the Sierra Maestra mountains. Even though it’s still extremely dangerous, I’m happy to see it didn’t intensify as much as I feared it would.
(3/4) Think of a figure skater, or a professor holding dumbbells standing on top of a spinning chair. As either one brings their arms in, they spin faster. We may observe a similar effect with Melissa.
October 29, 2025 at 1:30 AM
(3/4) Think of a figure skater, or a professor holding dumbbells standing on top of a spinning chair. As either one brings their arms in, they spin faster. We may observe a similar effect with Melissa.
(2/4) Right now, the pressure gradient force is trying to crush air inwards. Since the centrifugal force is weaker due to relatively slow winds, a net push inwards exists. This will encourage inwards motion and, through the conservation of angular momentum, strengthening of winds.
October 29, 2025 at 1:30 AM
(2/4) Right now, the pressure gradient force is trying to crush air inwards. Since the centrifugal force is weaker due to relatively slow winds, a net push inwards exists. This will encourage inwards motion and, through the conservation of angular momentum, strengthening of winds.
Melissa is quite far out of force balance after reemerging from Jamaica. The sea-level pressure gradient as measured by recon suggests a wind speed of 104 mph, but their dropsonde only measured 78 mph. This disequilibrium may encourage rapid restrengthening, see below. (1/4)
October 29, 2025 at 1:30 AM
Melissa is quite far out of force balance after reemerging from Jamaica. The sea-level pressure gradient as measured by recon suggests a wind speed of 104 mph, but their dropsonde only measured 78 mph. This disequilibrium may encourage rapid restrengthening, see below. (1/4)
Category 5 Hurricane Melissa made landfall today near Black River, Jamaica with 185 mph winds and is currently re-emerging near Falmouth. If you have the means, I strongly encourage you to consider donating to a relief effort.
Direct Relief: donate.directrelief.org/give/647931#...
(more below)
Direct Relief: donate.directrelief.org/give/647931#...
(more below)
October 28, 2025 at 9:05 PM
Category 5 Hurricane Melissa made landfall today near Black River, Jamaica with 185 mph winds and is currently re-emerging near Falmouth. If you have the means, I strongly encourage you to consider donating to a relief effort.
Direct Relief: donate.directrelief.org/give/647931#...
(more below)
Direct Relief: donate.directrelief.org/give/647931#...
(more below)
Upper-level cutoff low, slightly chilly, 85 MUCAPE is my favorite weather outside of chasing
October 27, 2025 at 9:39 AM
Upper-level cutoff low, slightly chilly, 85 MUCAPE is my favorite weather outside of chasing
Comet A6 Lemmon has gotten everybody's attention lately, but did you know there's a second comet in the sky right now? On Friday night, C/2025 R2 (SWAN) was faint and has no discernible tail, but that only let its fuzzy green coma shine more clearly.
October 21, 2025 at 5:45 AM
Comet A6 Lemmon has gotten everybody's attention lately, but did you know there's a second comet in the sky right now? On Friday night, C/2025 R2 (SWAN) was faint and has no discernible tail, but that only let its fuzzy green coma shine more clearly.
At the time of imaging, it was about magnitude 4.6. It has started to produce something of a dust tail, but it’s much less that C/2023 A3 (Tsuchinshan/ATLAS) last year and that’s keeping its brightness down. Through my 10x50 binoculars it looked like a faint colorless smudge.
October 19, 2025 at 9:19 PM
At the time of imaging, it was about magnitude 4.6. It has started to produce something of a dust tail, but it’s much less that C/2023 A3 (Tsuchinshan/ATLAS) last year and that’s keeping its brightness down. Through my 10x50 binoculars it looked like a faint colorless smudge.
Comet C/2025 A6 (Lemmon) near peak brightness on October 17!
(see replies for visual binocular view)
(see replies for visual binocular view)
October 19, 2025 at 9:18 PM
Comet C/2025 A6 (Lemmon) near peak brightness on October 17!
(see replies for visual binocular view)
(see replies for visual binocular view)
I took this shot this morning, from 5-7 AM with the full moon bearing down on me the whole time. I wasn't able to pull the faint tail out this time. In a way, that emphasizes the vivid green coma, a gravitationally unbound cloud of glowing gas emitted from the cometary nucleus.
October 6, 2025 at 9:47 PM
I took this shot this morning, from 5-7 AM with the full moon bearing down on me the whole time. I wasn't able to pull the faint tail out this time. In a way, that emphasizes the vivid green coma, a gravitationally unbound cloud of glowing gas emitted from the cometary nucleus.
Full loop of the Fujiwhara effect between hurricanes Humberto and Imelda up to the present! I plan to update this with the rest of Imelda's lifespan as it drifts out of frame in 3-7 days.
October 2, 2025 at 4:32 AM
Full loop of the Fujiwhara effect between hurricanes Humberto and Imelda up to the present! I plan to update this with the rest of Imelda's lifespan as it drifts out of frame in 3-7 days.
Veil Nebula (Caldwell 33/34, NGC 6960/6992) [True Color] - September 25, 2025
September 30, 2025 at 6:47 AM
Veil Nebula (Caldwell 33/34, NGC 6960/6992) [True Color] - September 25, 2025
If I could pick one place from my travels to go back to tomorrow, it’d be Sonoma, California.
September 16, 2025 at 2:52 AM
If I could pick one place from my travels to go back to tomorrow, it’d be Sonoma, California.
Sunset pictures on the side of the highway are self care in times like these
September 14, 2025 at 12:46 AM
Sunset pictures on the side of the highway are self care in times like these
September 8, 2025 - Shattuck, Oklahoma
Yesterday wasn't just good for structure. It also had some great bolts after dark!
Yesterday wasn't just good for structure. It also had some great bolts after dark!
September 10, 2025 at 5:53 AM
September 8, 2025 - Shattuck, Oklahoma
Yesterday wasn't just good for structure. It also had some great bolts after dark!
Yesterday wasn't just good for structure. It also had some great bolts after dark!
I love seeing the way the tail materializes out of thin air and the rush of the inflow into the stacked plates above.
September 10, 2025 at 5:52 AM
I love seeing the way the tail materializes out of thin air and the rush of the inflow into the stacked plates above.