Glad there's finally information on it! Nice find! I believe testing is the second or third Wednesday of the month. I've heard it activate anywhere between 9 and 11 a.m. I work right across 27th Avenue from the plant, so I hear it very clearly. The Oblique imagery from the Maricopa County GIS Aerial...

I'm kicking myself for missing that.

https://www.azfamily.com/news/no-emerge ... daa92.html

Anyone hear about this earlier today?

There's three total locations for those Whelen's in Tempe. I believe they are marked on the Arizona Siren Map.

This is the best angle I can find on Google Maps. Street View doesn't show much of anything, as the location is too far from any roads that have been covered by Google.

2304 W Lower Buckeye Rd, Phoenix, AZ 85009

If you look at the overhead view, there appears to be the shadow of a siren next to the trees, behind one of the admin buildings.

It's entirely possible. It did sound semi-electronic. There weren't any voice announcements, though.

I'm not well-versed enough to give you a specific guess. It was fairly high in pitch, and sounded both in constant hi, and hi-low. Definitely not like that Thunderbolt. Maybe a 2001?

I drive past the plant almost daily, and can never spot any siren installations from the road.

Here's a question for all of you Arizona siren buffs. Today, between 10:30 an 11:00 A.M., some sort of siren was activated for minutes at a time, in varying patterns (one would assume "alert" and "attack"), and was most definitely rotating as it was sounding. The closest siren to...

This was posted on the Nevada Siren Map. It is labeled there as a Whelen Vortex. https://www.google.com/maps/@36.8939501,-113.9305437,3a,75y,359.53h,90t/data=!3m7!1e1!3m5!1s2Z5BqcBgwD3aIqko47wWzw!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3D2Z5BqcBgwD3aIqko47wWzw%26output%3Dthumbnail%26cb_client%3Dma...