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Kelsey Jordahl

@kajord.hachyderm.io.ap.brid.gy
25 followers 45 following 491 posts

Geophysicist by training, software engineer by profession. Interested in science, computing, data. KM7EXA 🇺🇦 🇨🇦 #remotesensing #python #scicomm #geospatial 🌉 bridged from ⁂ hachyderm.io/@kajord, follow @ap.brid.gy to interact

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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 4h
Coffeeneuring ride #4: Coffee shop without walls Bowl & Pitcher, Riverside State Park #Coffeeneuring #coffeeneuring2026 #BikeTooter #Spokane www.strava.com/activities/207171949…
Bike helmet, coffee grinder, pour over and mug, and camp stove on picnic table by the riverBike leaning against a picnic table, river in background Travel mug on bridge railing over Bowl & Pitcher rapids, Riverside State Park
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 16/10/2026
Coffenuering ride #2 to New Love Coffee on Francis This route into town took me through one of the areas most devastated in the #SpokaneFires this past August. #Coffeeneuring #coffeeneuring2026 #Spokane www.strava.com/activities/206112960…
Strava map of track for bike ride to New Love Coffee in SpokaneCappuccino on a table with a red bike helmetFoundations of houses that have been burned to the ground in the Rifle Club neighborhood of SpokaneBurned houses and burned pine trees in the Rifle Club neighborhood of Spokane
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 12/10/2026
Coffeeneuring ride #1 for me, to Indaba in Kendall Yards, just over 20 miles round trip. #coffeeneuring #coffeeneuring2026 #Spokane www.strava.com/activities/205593586…
Cappuccino on a table with a bike helmet on a bench behind it. Outside through the window, a bike locked to a rack.Spokane River with fall colors.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 11/09/2026
@glyph luckily all these things *also* notify me by email
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 07/09/2026
Yikes! Good thing I noticed this old phone sitting in the back of a drawer!
An old iPhone 4 with the back lifting off due to a bulging battery.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 18/08/2026
Mount Baker. Maybe a pyrocumulus cloud in the background?
Aerial view of a stratovolcano with a pillar of cloud behind it.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 07/08/2026
Rescued a few tomatoes and two tomato plants when I got back into the house again. Still may be a while before we can go back for good.
Heirloom tomatoes on an outdoor tableTwo wilting tomato plants sitting on the sidewalk
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 03/08/2026
Near infrared satellite view through the smoke from yesterday. Burn scar of the Old Trails fire matches the official fire perimeter pretty closely. Source: Planet Labs PBC (Planetscope) #Spokane #SpokaneFires
Near infrared image from Planetscope (Dove) satellite, 2026-08-02 11 18:44 UTC

View of Spokane area with burn scars from 3 active fires visible as dark regions through heavy smoke.

Copyright 2026 Planet Labs PBC, all rights reserved
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 03/08/2026
@rjhale1971 old joke
Screenshot of Chevy Chase from Saturday Night Live (circa 1975) with the text:

AND THIS JUST IN
GENERALISSIMO FRANCISCO FRANCO IS STILL DEAD
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 02/08/2026
Safely at a friend’s house. Scenes from an evacuation:
Large plume of smoke looming over treesLarge plume of snake over highway
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 30/07/2026
Connected to Home Assistant last night, and it got data overnight. Very easy with the ESPHome integration ready to go: esphome.io/components/sensor/sps30 #AirQuality #diy #HomeAssistant #ESPHome
Graph of Indoor PM <2.5µm Weight concentration, rising from about 2 μg/m³ at 9:30 pm to about 11 μg/m³ at 7:30 am.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 30/07/2026
I have hooked the sensor up to an ESP32 device I had lying around, and it is getting data! Still need to get it integrated into Home Assistant for data logging and see if it looks reasonable.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 26/06/2026
18 miles each way, 1200 ft elevation gain, a fair bit of gravel, a few miles on the Centennial Trail, and relatively low traffic on the other roads. ridewithgps.com/routes/55765497?pri… #BikeTooter #bikepacking #Spokane
Map of route from Seven Mile bridge to south shore bike-in campsite on Long Lake. Elevation profile shows 1,196 ft of gain over 17.6 miles.

source: https://ridewithgps.com/routes/55765497?privacy_code=Fs2cq2paV7NsMhe9whIS86TxD3pDp1Pt
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 26/06/2026
It looks like my planned Montana bikepack this weekend is going to get rained out, but here are pictures from my 36 mile overnight trial run last weekend to the bike-in site on Long Lake. #BikeTooter #bikepacking #Spokane
A loaded bike leaning against a concrete picnic table, with Ponderosa pines and a lake in the background.Sunset over the hills at Long Lake on the longest day of the year.Lake shore at the nearest spot to get water. Old logs on the beach in the foreground, steeply sloped banks with pine trees in the background.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 20/06/2026
New tires on the adventure Unit, ready for a trial run before a 3 day trip next weekend. I’ve only set a few pairs of tubeless tires, but these were the toughest yet. I was stuck at Step 3 of the instructions for a while, “Squint at the tire while wondering why […] [Original post on hachyderm.io]
Orange Kona Unit X with new tires leaning against a wall Line drawing of a guy squinting at a tire with bead not fully set. Some Korean instructions visible above.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 16/06/2026
Two SuperScoopers tanking up again for another pass
Flight track for a 2013 CANADAIR CL-415 SuperScooper (with a second in close proximity) near Lake Spokane northwest of the Spokane area in map view.

source: https://globe.adsb.fi
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 01/05/2026
I have never seen a utility operation drilling horizontally like this, pretty cool!
Yellow industrial equipment running a drill rig into the ground alongside a road, almost horizontally.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 27/04/2026
Also LOL that the HARMLESS WEATHER INSTRUMENT is attached to a balloon that might still be a little bit explody if there is any hydrogen left in it.
A styrofoam-covered box labelled "HARMLESS WEATHER INSTRUMENT" and a tag attached to the balloon that reads "WARNING.... !! DO NOT TOUCH BALLOON !!"
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 27/04/2026
I recovered my first radiosonde today! Launched from Spokane, this one landed close enough to town to try to follow it, but a bit farther than predicted, so I chased it into Idaho. It landed behind a farmer's field, he drove me back in his four-wheeler to […] [Original post on hachyderm.io]
An orange plastic parachute lying on grass, connected by a string to a small styrofoam-covered box.A small styrofoam-covered box with a NOAA logo reading:

HARMLESS WEATHER INSTRUMENT
www.weather.gov/upperair/radiosonde

This is a radiosonde, a balloon-bore instrument used by the NOAA Natlonal Weather Service (NWS) to obtain data aloft for weather forecasts and research. IT IS NOT DANGEROUS. Please do not return the radiosonde to the NWS. Recycle or dispose of property.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 13/04/2026
I got out yesterday to check out the bike-in campsite on Lake Spokane (the only one designated as such, as far as I am aware). Accessible on foot or bike, I did not stay overnight but it is in my plans for overnight bikepacking this season […] [Original post on hachyderm.io]
Campsite with picnic table, bike, and information kioskRoad to the bike-in campsite (no cars allowed)Arrowleaf balsamroot in bloom at the bike-in campsiteView of Lake Spokane from bike-in campsite
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 05/04/2026
Joined in some silliness yesterday as a roving band of cyclists tried to carry bikes up every possible set of outdoor stairs in Spokane. outthereoutdoors.com/spokane-stair-… #Spokane #StairMaster #BikeTooter
Crazy people carrying the bikes up stairs.A bunch of people carrying bikes up an obscure stairwayMore people carrying bikes up stairsPeople carrying bikes up a rickety wooden staircase
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 01/04/2026
@skinnylatte
Flyers mascot Gritty dresses for 80's night during the game between the Los Angeles Kings and Philadelphia Flyers on January 18, 2020 at Wells Fargo Center in Philadelphia, PA. (Photo by Kyle Ross/Icon Sportswire via Getty Images)
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 01/04/2026
They're sending up a lot of weather balloons ahead of the #Artemis launch. Onshore winds at ground level, offshore at higher levels. sondehub.org/#!mt=Mapnik&mz=10&qm=3…
Map of 4 balloon launches from Cape Canaveral with projected tracks offshore.

Source: sondhub.org
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 14/03/2026
@LabSpokane hmm, the shipping box might even work in a pinch.
Small translucent plastic box (approximately 2 in by 3 in, or 5 cm by 8 cm) containing a LILYGO circuit board
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 12/03/2026
Tonight sounds fun! "Hazardous boating conditions", I hope no one is planning on going out on inland waterways after midnight in March! #Spokane #wx
Strong Winds Wednesday - Thursday

Potential Impacts
* Numerous to widespread power outages
* Widespread tree damage and damage from unsecured items
* Difficult travel from crosswinds
  * Highest risk: for high profile vehicles
* Hazardous boating conditions
* Patchy blowing dust
* Highest risk: Waterville Plateau and Columbia Basin

[Map of peak wind gusts in eastern Washington and northern Idaho, including up to 60-70 mph in Spokane, and over 100 mph in the mountains.]

NWS caption: Strong wind gusts are expected to develop Wednesday evening and persist into early Thursday morning. Wind gusts of 50 to 65 MPH are possible, which may lead to widespread tree damage and power outages. Other impacts include choppy lakes, difficult driving for high-profile vehicles, and the potential for blowing dust around the Moses Lake Area.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 04/03/2026
You keep using that word, "discount". I do not think it means what you think it means.
Subtotal $44.99
Discount -$14.89
TOTAL $59.88
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 30/01/2026
The actual Nature paper (doi.org/10.1038/s41586-025-10030-0) is paywalled, but they posted this image to BSky. source: bsky.app/profile/natureportfolio.na… #fossils #CambrianExplosion
Figure 2 from Zeng et al, A Cambrian soft-bodied biota after the first Phanerozoic mass extinction, Nature, 2026.

Shows non-bilaterian metazoans, deuterostomes and problematic taxa from the Huayuan biota.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 26/01/2026
Paper in Science: doi.org/10.1126/science.adz4676
Figure from Fernando and Charalambous (2026), Reentry and disintegration dynamics of space debris tracked using seismic data. Science 391, 412-416. DOI:10.1126/science.adz4676

Fig. 2. Pointwise and interpolated arrival times of sonic booms at stations across the Southern California and Nevada Seismic Networks.
(A) A map of stations recording the sonic boom signal in California and Nevada, color coded by relative arrival (time delay, in seconds). Two stations (SMI and SEV) discussed in detail in Fig. 1B are highlighted. Station codes are given in fig. S1. (B) A cubic-spline interpolated contour map of arrival times, with the preentry prediction (dashed gray line), seismic best fit (solid gray line), and seismic 2σ confidence interval (shaded gray area) for 1000 inversions. We identified a transition from active shockwave generation by the reentering module to passive propagation of infrasound waves produced by shockwave decay between the 117th and 116th meridian.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 11/12/2025
Did it! Should be a fun bike next season. #BikeTooter
An orange Kona Unit X mountain bike, riderless, at the edge of the woods
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 03/12/2025
Temperature graph since midnight Sunday night: #Spokane #wx
Temperature graph from 1 Dec through midday 3 Dec, showing a total variation of about 3 Fahrenheit degrees.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 03/12/2025
I was starting to think my temperature sensor was offline, but no, the temperature really has been nearly constant over the past 3 days, hovering right around freezing.
TEMPERATURE (°F)

DAY   MEAN TEMP   HIGH   TIME    LOW   TIME
---------------------------------------------------------------------------
01             31.4            33.6   12:13    29.7    05:36
02             32.0            33.4   13:29    30.9    06:49
03             31.6            33.4   12:03    30.7    06:35
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 02/12/2025
Current sunspot cluster is nearly as large as the one that led to the Carrington event in 1859. "Any explosions today will be geoeffective", meaning that if there is a solar flare today related to this giant sunspot cluster, it would likely impact Earth […] [Original post on hachyderm.io]
"The image shows Carrington's drawing of the 1859 sunspot inserted to scale on a Dec. 2, 2025, image of sunspot complex 4294-4296. They're about the same size. The surface area of Carrington's sunspot was ~2300 millionths of the solar disk. The surface area of 4294-4296 is 2080 millionths, about 90% as large."

source: https://spaceweather.com/archive.php?view=1&day=02&month=12&year=2025
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 04/11/2025
North Cascades under a layer of clouds
Two snow covered peaks poking out of a sea of clouds, with more peaks in the background
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 31/10/2025
Impressive, if not necessarily practical, selection of languages on this web form!
Drop down language selection from a web form (image of a table view):

Options include:
- Egyptian (Ancient)
- Ekajuk
- Elamite
- English
- English, Middle (1100-1500)
- English, Old (ca.450-1100)
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 29/10/2025
Satellite view (GOES-19) of a monster storm as it makes landfall yesterday. (source: satlib.cira.colostate.edu/loop_of_t…) #hurricane #Melissa #xp
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 10/10/2025
Update: I have received the custom brackets already from SendCutSend! They fit perfectly. I was a bit conservative and got a heaver plate steel than I needed, but that didn't cost much extra. Very impressed that this was so easy and reasonable! I probably would […] [Original post on hachyderm.io]
Back side of a speaker with custom steel bracket installed to connect to 1/4" speaker mount.Two steel plate brackets with 3 holes each, sitting in front of a shipping box from SendCutSend and a sticker reading "Just Gonna Send It".
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 09/10/2025
Luckily the politics of the Linux distribution I'm using are simple and uncontroversial.
Complicated flowchart of options for a resolution for the Debian project to make a statement regarding Richard Stallman's reinstatement to the board of the Free Software Foundation.

The winning option was "Debian will not issue a public statement on this issue"

Source: https://www.debian.org/vote/2021/vote_002
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 03/10/2025
I enjoyed this animation from the manufacturer (micacycles.com) of things you can strap to their bike rack cargo cage. #BikeTooter
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 02/10/2025
Mmm, chicken sashimi!
Plate of sliced chicken, raw in the middle, with garnish of sliced carrots, lime, and wasabi.

To the best of my knowledge, this is not AI generated, from a restaurant guide to Nagoya, Japan.

source: https://www.nagoya-info.jp/en/gourmet/detail/4/
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 26/09/2025
Graph from my sensor. PM 2.5 in the 55-150 μg/m³ range is equivalent to "unhealthy" on the air quality index. #wildfire #AirQuality #Spokane #WA
Graph of PM 2.5 particulates since noon today, showing a brief spike around 3:00 pm and a bigger one starting around 5:00 pm.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 18/09/2025
I took a couple days this week to get out on some gravel rail trails in British Columbia. Beautiful country, the mountains get big quick north of the border. #BikeTooter #BC #Canada #gravel #railtrail
A loaded gravel bike leaning against a picnic table, high above Lower Arrow Lake, looking across to the forested land on the far shore.Abandoned rails leading to the start of the Columbia and Western rail trail near Castlegar, British Columbia, Canada. An information kiosk is on the left, a vehicle gate at the start of the trail.The Crow's Nest highway (BC 3) passes high above the trail over the Paulson Bridge.A gravel bike leans against a wooden post at a picnic stop on the Columbia and Western rail trail, a gravel trail behind it, and a forested ridge in the distance.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 04/08/2025
Nice GDAL utility you found, Google! Too bad you just made it up and it doesn't exist.
Al Overview

GDAL includes Python utility scripts, including gdal_pca.py , which may be included in the GDAL distribution.

What is gdal_pca.py?

While the core GDAL library focuses on raster and vector data format translation, it also offers a collection of Python-based utilities for various processing tasks. gdal_pca.py is one such utility, likely designed to perform Principal Component Analysis (PCA) on raster datasets, a technique commonly used in remote sensing and image processing.

How to use gdal_pca.py

- Command Line Interface: Similar to other GDAL utilities like gdal_calc or gdal_translate, gdal_pca.py would likely be used from the command line, providing input raster files and specifying output options.

- Python Bindings: You could also integrate the functionality of gdal_pca.py within your own Python scripts by importing and calling the relevant functions, leveraging GDAL's Python bindings.

Note: Specific usage details and command-line options for gdal_pca.py would be available in the official GDAL documentation or by running gdal_pca.py --help on your command line.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 01/08/2025
San Francisco, AI billboards are everywhere.
Billboard reading “Droids ship software while you sip coffee -factory.ai”
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 17/07/2025
French research vessel L'Atalante surveys radioactive waste barrels that were dumped on the seafloor over the course of 40 years (from the 1950s to the 1990s). #NODSSUM
Barrel dumped at the seafloor at about 4700 m water depth
Copyright: Flotte Océanographique Française - Campagne NODSSUM.
(via @jescartin.bsky.social‬)
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 14/07/2025
I rode by the site of last weekend's fire in Riverside State Park yesterday. Crews managed to stop it before it spread too far, and it looks like many of the Ponderosa pines may survive as well. #wildfire #Spokane #AubreyFire #xp
A burned pine savanna landscape, with all ground vegetation blackened, and Ponderosa pines scorched but not completely burned. Green pines are visible on the hillside in the background.Post-fire landscape with burned Ponderosa pines, many still with needles. Ground vegetation has burned completely. Power lines run through the frame and a cliff with green pines is visible in the background.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 07/07/2025
I had actually stopped to get a picture of the fire on the way home, right before the first evacuation order! #wildfire #Spokane #AubreyFire #xp
Wildfire smoke from the Aubrey fire in Riverside State Park, seen from Northwest Boulevard across the river.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 25/06/2025
@ai6yr "The New Golden Age of HUD" with a private elevator, executive dining room, and a private gym for HUD secretary *and his family*. eos.org/research-and-developments/n…
Virginia Governor Glenn Youngkin, U.S. Department of Housing and Urban Development (HUD) Secretary Scott Turner, and U.S. General Services Administration Public Buildings Service Commissioner Michael Peters announced a relocation of HUD and NSF staff at a 25 June press conference. Credit: U.S. Department of Housing and Urban Development

Podium banner reads "HUD's New Home in VA", background banner reads "The New Golden Age of HUD"
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 22/05/2025
I found another photo in front of the Blue Marble, I am assuming this is at the White House but not definite. From the National Archives: clintonwhitehouse4.archives.gov/WH/… #BlueMarble #xp
Al Gore with a group of children standing in front of a large photo of the Earth.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 22/05/2025
Was this photo of the Grateful Dead with Al Gore taken in the West Wing? Did the Clinton White House have a huge print of the Apollo 17 Blue Marble photo on the wall? cc @rsimmon.bsky.social‬ #BlueMarble #xp heads.social/@bourgwick/11455241644…
Left to right: Dennis McNally, Mountain Girl, Jerry Garcia, Mickey & Caryl Hart, Al Gore, Phil & Jill Lesh, Cassidy Law

standing in front of a large image of the Earth from Space and another smaller framed picture on the wall.
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Kelsey Jordahl @kajord.hachyderm.io.ap.brid.gy · 19/05/2025
Got out yesterday to explore a less traveled part of Washington State. I've been wanting to check out the area where the Palouse to Cascades Trail and the Columbia Plateau Trail cross. Both are rail-to-trail paths now operated by Washington State Parks, and both […] [Original post on hachyderm.io]
Bike leaning on a gate on the Columbia Plateau Trail. Trail is chunky gravel passing through a cut in the basalt bedrock.Old railroad trestle at the spot where the Columbia Plateau Trail passes over the Palouse to Cascades Trail. Both trails are former railroad beds now operated by Washington State Parks.Gravel road winding uphill with ominous dark clouds looming above. Yellow road sign gives 35 mph limit.Abandoned building on the side of a gravel road, with puffy gray clouds overhead.
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