A quick update…
v1.5.3
Can’t get radar to come up from rain panel. Clicking on it does nothing.
I’m going out on a limb here and guessing you’re on Safari?
Actually scratch that it’s not safari issue this time. So when you say it does nothing, nothing pops up like literally nothing? What browser and OS?
It’s worked fine in the past. I’m using Chrome and Windows 11 like I always have and it literally does nothing. Nothing is popping up at all.
I’m assuming you’ve closed it and reopened or refreshed already right?
Just closed Chrome all the way down and reopened. Its working again. Thanks! As an IT person, you’d think I’d know better, lol.
Small update that I think helps
version: 1.5.8
The Lightning panel now shows the last strike’s distance much larger, so it can be read from across the room
A quick thank you and a heads up on pricing
First off, a genuine thank you to everyone who’s subscribed to Halcyon so far. It means a lot, and you’re the reason this keeps moving forward.
A small heads up: the launch price is going up from $11.99/year to $14.99/year on Monday at 11:59 PM Eastern. If you’ve been on the fence, or you know someone who has, now’s the time. Anyone who subscribes before then locks in as a 
founding member , right alongside the rest of you.
What that means: founders get all new features at no extra cost
, including the charts module I’m working on now, which is a fairly big undertaking so there’ll be a new Pro plan. You’re locked in.
Thanks again for being here early. More coming soon.
HISTORY AND CHARTS ARE HERE! 
Calling this 2.0 release even though the dashboard hasn’t changed.
2026-06-20
BTW I discovered an anomaly in the historical data page.
Quite the change to go from -39F to 138F in a single day. The Tempest history shows no such data.
This is for Tempest . I did not import any other station’s data.
Good catch, and you’re right that it’s not real. On May 5, 2023 your Tempest had an off day: for that one date its readings were degraded. A lot of values came through missing or stuck, and the temperature channel reported a string of impossible numbers (down to −39 °F and up to 138 °F in bursts) before returning to normal. The real temperature that day was in the high teens °C. The days before and after look completely normal and the battery was healthy throughout, so it appears to be a one-day device hiccup rather than an ongoing or power problem.
Why the Tempest app doesn’t show it: its History view runs the data through a cleaning pass that hides momentary glitches. Our Charts page currently plots the raw, unfiltered feed. Great for fidelity, but it means a hiccup like this can show up as a false “record.”
Two things we’re doing about it. First, a filter to screen out physically-impossible readings so glitches won’t surface as records or distort the charts. Second — the part your report nudged us toward — rather than just hiding them, we’ll surface flagged anomalies in a data-health view, so you can see exactly when your station misreported. That makes it easy to tell a real record from a glitch, and if a unit starts misbehaving you’ll have the dates and values to report it to Tempest/WeatherFlow support.
I’ve pulled the full set of anomalies for that day (attached), and can send the raw minute-by-minute readings too. Given it looks like a one-day hardware hiccup, it may be worth flagging to WeatherFlow support. Happy to help you put that together. Thanks for flagging it. Exactly the kind of thing that helps us harden the data handling.
Why the Tempest app doesn’t show it: its History view runs the data through a cleaning pass that hides momentary glitches. Our Charts page currently plots the raw, unfiltered station feed. Great for fidelity, but it means a one-off hardware hiccup can show up as a false “record.”
Two things we’re doing about it. First, we’re adding a filter to screen out physically-impossible readings so these glitches won’t surface as records or distort the charts. Second, and this is the part your report nudged us toward, rather than just hiding them, we’ll surface the flagged anomalies in a data-health view, so you can see exactly when and how your station misreported. That makes it easy to tell a real record from a sensor fault, and if a sensor starts misbehaving you’ll have the dates and values on hand to report it to Tempest/WeatherFlow support.
On that note, I’ve already pulled the full set of anomalies for that day for you (attached). Thanks for flagging it. It’s exactly the kind of thing that helps us harden the data handling.
Device: Tempest 181828 · Date: 2023-05-05 (local, America/Los_Angeles)
Source: WeatherFlow device-observations API (raw, unfiltered)
On 2023-05-05 this Tempest malfunctioned for the day. Two problems, both confined to that one date:
A fully healthy day for this device is ~1,440 complete readings (one per minute, all sensors populated). May 5 stands out as corrupt; note May 12 a week later shows a different fault (an outage):
| Date | Rows | Temp present | Impossible temps | Pressure present | Humidity stuck at 15% | State |
|---|---|---|---|---|---|---|
| 2023-05-05 (this day) | 1,241 | 88 | 23 | 20 | 763 | online but malfunctioning |
| 2023-05-12 | 381 | 381 | 0 | 381 | 0 | offline ~17 h, then clean ¹ |
| 2023-08-14 | 1,439 | 1,439 | 0 | 1,439 | 0 | healthy |
| 2023-02-01 | 1,434 | 1,434 | 0 | 1,434 | 0 | healthy |
¹ On May 12 the device sent nothing from ~00:01 to 17:31 local (~17.5 h dropout), then reported cleanly every minute through midnight — a connectivity/power outage, not corruption.
Interpretation: May 5 was a one-day device malfunction — degraded reporting combined with impossible temperature output. Battery was healthy throughout (2.54–2.60 V), so it isn’t a low-battery brownout. Combined with the ~17-hour outage on May 12, this unit had a rough stretch in May 2023, which is worth reporting to WeatherFlow/Tempest support for a hardware check.
These spikes are why Halcyon’s Records showed 138 °F / −39 °F for this day. The official Tempest app filters momentary sensor glitches out of its History view, which is why you don’t see them there.
Interesting, I wonder what was going on with the sensor then. I don’t recall replacing it. Maybe I’ll have to go through the archives and look. Does Halcyon note sensor IDs in the history?
You don’t recall exactly what you were doing on May 5th, 2023 by the minute? 
What do you mean about the sensor ID? We know what sensor it is just by the knowing what we are measuring.
Oh, yes. We have that unique information.
Mannn of course I’m a week behind purchasing my tempest finally on prime day after wanting it for years and you just transferred from founders to 2 tier sub plan… that’s my luck!
New release. 2.1.0
I was tired of the radar we were using. Get a free account at https://www.xweather.com/
button to overlay cloud-to-ground strikes from the last 15 minutes — see where a storm is actually striking, alongside the strike distance your Tempest already reports. Lightning imagery uses your Xweather tile credits about ten times faster than radar, so it’s tap-to-show and Halcyon gives you a heads-up the first timeHD radar option with lightning is a fantastic and welcomed feature upgrade! Would still love to see Radar be available as a Panel/Slot dropdown option so that it can be displayed natively along with other panels, if desired, instead of having to open up the radar manually—and forced fullscreen—each time. That way we could see a snapshot of the current radar along with our other panel/slot options with option to tap the Radar Panel/Slot to open it up fullscreen with animation/other settings coming into effect. Radar integration on the main display is quite literally the only thing that the original Tempest app has going for it; radar is part of the main Tempest display if we want, and I truly appreciate that feature. Would love to see Radar as a Panel/Slot option for HalcyonWx. 
Other than native radar visibility on the Tempest app main page, we all know how horrible the Tempest app is in general and how much HalcyonWx blows it out of the water! Anyways. Just wanted to throw this request back out there for consideration.
We appreciate y’all’s hard work with all these updates—much respect! And, as always, you guys are awesome—thank you huge!
Which product do we select to get a free account? I see the option for a free API but not a free account.
Getting a free account is not very intuitive but I was finally able to create it and get the required information to configure it in Halcyon.
Thanks for the reply, I’ll add something in the settings so it’s clear or maybe I can do a direct link or something.
