July (they/them) @misovortex.bsky.social · 22hChoi-wan this morning 😎 Noticing it's maybe starting to develop the large outer ring that was seen in other super typhoons this year like Bavi and Dolphin. This feature is potentially very long lived, but Choi-wan is quickly heading poleward and will baroclinically transition soon. 071
July (they/them) @misovortex.bsky.social · 04/10/2026Typhoon Choi-wan providing some nice eye candy. 0120
July (they/them) @misovortex.bsky.social · 30/09/2026Yes, Matthew is the source of the infamous "skull" face hurricane satellite image, which emerged just before landfall in Haiti. 040
July (they/them) @misovortex.bsky.social · 30/09/2026Matthew holds the record for the southernmost Cat 5 in the Atlantic basin, and ended the 2008-2015 Cat 5 drought. Since Matthew there have been 12 more Atlantic Cat 5s. The storm is regarded as the worst weather disaster in Haiti's recent history. Aftermath via NYT: www.nytimes.com/interactive/... 150
July (they/them) @misovortex.bsky.social · 30/09/2026Ten years ago today (eastern time): Hurricane Matthew reaches Category 5 intensity, the first to do so since Felix (2007). Matthew caused devastation across the Caribbean, esp. in Haiti, where over 500-1000 people were killed and cholera cases spiked across the impoverished southern region. 162
July (they/them) @misovortex.bsky.social · 28/09/2026Again I'm noticing an annular appearance (latest SHIPS annular hurricane index is 80/100) and relatively weak/low-topped eyewall asymmetries similar to Karina. Interestingly Nolo's presentation here looks kind of "in between" those of Karina and Lowell in the quoted post's snapshots. 150
July (they/them) @misovortex.bsky.social · 28/09/2026A case of a rapidly strengthening TC with eyewall lightning nearly completely absent, assuming there's no undersampling. To me this suggests distinct modes of vortex structure during intensification. 1131
July (they/them) @misovortex.bsky.social · 24/09/2026Video of a flythrough in Hurricane Polo's eye as seen from N43RF. Credit to @flynoaa on IG, original caption in alt text. www.instagram.com/flynoaa/reel... 0117
July (they/them) @misovortex.bsky.social · 05/09/2026Some kind of weird (barotropic?) instability occurred along the eyewall edge of Hurricane Lowell. Reminds me of those wispy cirrus swirls you sometimes see in the eye at sunrise. 071
July (they/them) @misovortex.bsky.social · 02/09/2026Sunrise on now Category 5 Hurricane #Lowell, the second Cat 5 of the 2026 eastern/central Pacific season. 040
July (they/them) @misovortex.bsky.social · 02/09/2026The most obvious differences are Lowell's small eye w/ bursting convection & significantly colder CDO Tbs vs Karina's annular presentation. Karina has also been steadier than still-intensifying Lowell. But that's not nearly enough physical info. Steady/weakening TCs do have these eyewall outbreaks. 170
July (they/them) @misovortex.bsky.social · 02/09/2026Two TCs with nearly identical intensity, but only one with an electrified eyewall. Finding out why is really interesting to me and IMO would strongly benefit storm nowcasting. Definitely on my "millenium prize" list of TC internal dynamics questions. 170
July (they/them) @misovortex.bsky.social · 01/09/2026Today marks the halfway point of the official Atlantic hurricane season. Here's how each northern hemisphere basin is doing so far in 2026 compared to the 1991-2020 average ACE. Figures are from here: tropical.atmos.colostate.edu/Realtime/ind... 261
July (they/them) @misovortex.bsky.social · 29/08/2026Ida was the last major hurricane I chased. This is footage of the strongest conditions at my location in Houma. I vaguely recall winds like this were intermittent but short lived, so maybe caused by a roll or inner band. We didn't get deep into the eyewall, but this might be representative of it. 171
July (they/them) @misovortex.bsky.social · 29/08/2026New Orleans/Slidell, LA radar reflectivity showing Hurricane Ida's intensification and landfall in southeastern Louisiana. 140
July (they/them) @misovortex.bsky.social · 29/08/2026Five years ago today: Hurricane Ida makes landfall in Louisiana with maximum winds of 150mph (240km/h). Later as an extratropical cyclone, Ida caused destructive flooding and a tornado outbreak across the northeast U.S., ultimately resulting in at least $75 billion in damages and 87 deaths. 1206
July (they/them) @misovortex.bsky.social · 22/08/2026Typhoon #Saudel steadily deepening. The core passed near/over the mostly uninhabited volcanic island of Agrihan in the Northern Mariana Islands several hours ago. Will present yet another threat to the Ryūkyū Islands in Okinawa prefecture in about 4 days. #CNMI #Okinawa 092
July (they/them) @misovortex.bsky.social · 19/08/2026Fun with RGB channels. Video shows false color imagery of Lala's intensification into a major hurricane over the course of yesterday (Aug 18 local time). Lala currently threatens #Kauō / #Laysan in the Northwestern Hawaiian Islands w/ 125mph (205km/h) winds, but is expected to weaken from here on. 1133
July (they/them) @misovortex.bsky.social · 16/08/2026Very subtle in this case but consistent with the disappearance of the signal at higher elevation sweeps. This would be the first time I’ve seen misovorts in a tropical storm strength system barring post season upgrade. All cases in our paper were C1 or higher. journals.ametsoc.org/view/journal... 130
July (they/them) @misovortex.bsky.social · 16/08/2026Longer animation. The misovortices seemed to develop in a jet that flowed toward/“connected” with the outward adjacent main eyewall, similar to behavior in storms like Hurricane Hanna 2020 just before landfall. bmcnoldy.earth.miami.edu/tropics/hann... 120
July (they/them) @misovortex.bsky.social · 16/08/2026Possible misovortices in the eastern eyewall of #Lala as seen from the shortwave finger shaped echoes with elevated spectrum widths. Difficult to confirm because of beam blockage. 172
July (they/them) @misovortex.bsky.social · 07/08/2026Infrared view of Dolphin's sudden RI on approach to Okinawa. Recently assessed at 90kt intensity by JTWC. ADT estimates are higher, around 100kt. 030
July (they/them) @misovortex.bsky.social · 07/08/2026Mesovortices almost certainly enhanced surface winds over northern Okinawa as Dolphin made its closest approach. They now seem to have subsided as the storm begins to move away as part of its trochoidal motion pattern. 163
July (they/them) @misovortex.bsky.social · 07/08/2026Visible mesovortex activity may indicate sudden RI as Typhoon #Dolphin #台風13号 dives southward from its previously westward trajectory north of Okinawajima. #那覇市 #沖縄市 #沖縄 退避しろ！ #Naha #Okinawa take cover NOW. 040
July (they/them) @misovortex.bsky.social · 27/07/202633 hours of GOES-East mesoscale sector imagery showing Genevieve reaching 140-kt intensity with GLM lightning overlay. (July 26 00:00 - July 27 09:00 UTC) 040
July (they/them) @misovortex.bsky.social · 27/07/202607/27 03z NHC update: #Genevieve reaches estimated maximum winds of 155mph (250km/h). No direct threat to any land areas. 031
July (they/them) @misovortex.bsky.social · 27/07/2026post a perfect album from the 90s that isn't nirvana, soundgarden, pearl jam, or alice in chains. 161
July (they/them) @misovortex.bsky.social · 26/07/2026Pronounced wavenumber-2 hot towers firing around the nascent (possibly elliptical) eye of strengthening Hurricane #Genevieve in the eastern Pacific. No direct threat to any land areas. 031
July (they/them) @misovortex.bsky.social · 19/07/2026I *just* missed a JAL B787 landing as I got there 😭 Here’s an ANA A320 instead. Sadly I couldn’t stay very long. 141
July (they/them) @misovortex.bsky.social · 19/07/2026Visited the Sky View observation deck at Kansai/Ōsaka airport today. 1162
July (they/them) @misovortex.bsky.social · 16/07/2026This is what’s known as a “vibe killer”. It could have been way worse though so I’m thankful in that sense. 020
July (they/them) @misovortex.bsky.social · 15/07/2026Discovered the zippy world of e-bikes today. Went halfway around Ishigakijima. 190
July (they/them) @misovortex.bsky.social · 10/07/2026If an ERC happens while you’re in the moat, does it count as reaching the eye? Asking for a friend Also, 959 hPa and stable. I think that’s the lowest it’ll get for me. 1101
July (they/them) @misovortex.bsky.social · 10/07/2026Down to 968 now. Outer eyewall is about to hit. 262
July (they/them) @misovortex.bsky.social · 10/07/2026I think Ishigakijima is going to miss the eye. Oh well. 140
July (they/them) @misovortex.bsky.social · 08/07/2026Away from my computer so I don’t have detailed imagery to inspect myself, but this supports a notion I have that wavenumber 2 asymmetries can be remarkably long lived in TCs. 251
July (they/them) @misovortex.bsky.social · 06/07/2026Here's a zoomed and brightness-enhanced version of the last three hours of the animation showing a kind of low-level cloud bridge rotating in the eye as a solid body. Wondering if this feature is wavenumber-2 in origin (i.e. "caused" by the elliptical core). 020
July (they/them) @misovortex.bsky.social · 06/07/2026Not very often you see numerical instability like this in HWRF. 832.6mb, lmao 2153
July (they/them) @misovortex.bsky.social · 06/07/202612 hours of Himawari-9 visible imagery of Super Typhoon #Bavi traversing through the Marianas. Lots of interesting things to see. The low-level eye spins up to solid body rotation over the course of the day. The eye (still) seemed kind of elliptical, but it's hard to tell for sure. 12211
July (they/them) @misovortex.bsky.social · 06/07/2026Interesting to see such a large divergence in the two Google AI/ML models (brick red and pastel pink) by 120 hours. 162
July (they/them) @misovortex.bsky.social · 05/07/2026Also suggested by the downwind bend of the Doppler velocities and higher spectrum widths along the western eyewall at the RMW as found in some cases in our recent paper journals.ametsoc.org/view/journal... 120
