Hail roar on tuesday

Joined
Jan 29, 2004
Messages
1,018
Location
Canton, Ohio
I was curious as to if anyone else heard the hail roar on the St Peter storm on tuesday. We got out of the vehicle several times and could hear a distinct low roar overhead that lasted for several minutes each time we were out taking pictures and video. That was the first time I had ever heard that, and it was truly awesome.
 
I've heard it several times, most notably on June 10, 2004 in Gothernburg, NE and on April 23, 2007 in Protection, KS.
 
We heard it out there.....We saw two distinct hail curtains that were apparently producing golfball to baseballs in Wakeeney. The lightning was absolutely nuts. The winds on the back side remained out of the SE for some time.....throwing rain and hail back on us a good ways up 283. Nothing was showing up on radar over us either. Quite a nasty storm.
 
We heard it out there.....We saw two distinct hail curtains that were apparently producing golfball to baseballs in Wakeeney. The lightning was absolutely nuts. The winds on the back side remained out of the SE for some time.....throwing rain and hail back on us a good ways up 283. Nothing was showing up on radar over us either. Quite a nasty storm.

Was also with Brett in WaKeeney and heard it too.....never heard a storm sound like it before very strange.
 
I think it was around 7:30 or 8:00....My video has the sound also, but I will check the time stamp on my video and pictures.
 
I heard something like this last year on June 5 while on the Huron area supercell in SD... we were watching the wall cloud taking pix and video, and I could hear this low constant roar, kinda like a very low rolling thunder that doesn't end. I've never heard anything like this before; I found it really weird but fascinating. This was before changing positions to view the tornadogenesis stage of the storm. There was supposedly hail with the storm, but I never saw it personally. We were south of the core/wall cloud during a majority of the time. I think I can hear the roar sound in my video, I will have to go back once and check again... if I can hear it, I should upload a segment on my site.....
 
On September 16 in SE SD this occured. We were NE of the tornado near Bridgewater, SD and could hear a low constant rumbling that is what I think was the hail roar. Mainly because I've never seen a color core like and hailed reported to softballs i thinl were reported in the core. It is very evident in the video of the tornado.
 
I'm wondering if hail is really neccessary to produce this roar. Many of the the times I've heard it, it was coming more from the forward flank precip areas east-northeast of the meso - which of course contain some hail, but in theory not enough to produce that sound. I think the sound may just be that of very dense heavy rain (with or without hail), but I could be wrong. I would expect the big hail noise to be north of the meso.

After we punched through at Protection, the sound was more to the east rather than from the north or back west where you would expect the larger hail to be. In Gothenburg 6/10/04, the roar was due north inside the core of a lining-out supercell. I drove north through that area immediately afterward and didn't see any hail on the ground.
 
I've heard the "hail roar" about a dozen or so times in my 20 year chasing experience. I've heard the sound exclusively while parked under the precip-free vault (echo overhang) a few miles downstream from the updraft base. It is always characterized by a distant white noise sound, like a distant jet engine at a constant rpm. Any attempt to record this sound with my video camera fails, due to other noises that block this ambient background sound (e.g., wind on mic, etc). Several of us have considered the possibility that this noise could be isolated via a high-gain directional microphone, but afaik, this has never been attempted.

The cause? Is it really due to hail? If so, hypotheses range from the constant sound of hail collisions, to extreme updraft flow shedding wake vortices off of millions of hailstones. Another theory is that it is caused by constant electrical activity (e.g., supercell lightning "anvil zits"), but I think the sound is too constant to be that. Therefore, it is still an unknown, and ripe for research if someone is so inclined.
 
I found this excerpt in the ST archives from March 31, 1983. The article is about sounds generated by tornadoes but this paragraph mentions "tornadic like roaring sounds" in the absence of tornadoes:

Space doesn't allow a full recounting, but two earlier Storm Track articles detailed three different encounters with tornadic like roaring sounds from high within CBs. No tornado was present with any of them! The first account by the Editor ST, Vol. 2, No. 6) discussed a May 22, 1968 storm cell about 12-14 miles west of Caldwell, Kansas. About 4 miles west of me was a rainfree CB base with an apparent hole in the middle, rotating cyclonically. Daylight appeared through the hole, with very dark and solid base surrounding it. A powerful, deep roar was heard that continued for several minutes, without oscillation or interruption. The earliest, tornadoes occurred 7 and 18 minutes later and 25 miles NE of this location! The other two reports were written up by Charles A. Doswell, III in a later newsletter (ST, Vol. 4, No. 2). In both instances (May 30, 1976 near Jacksboro, Texas and May 28, 1977 in western Oklahoma), somewhat isolated and dissipating CBs produced roaring sounds without tornadoes. "The storm was of the 'dryline' type ... very small ... appeared to be rotating anticyclonically. ...we heard a steady, muted roaring sound. As nearly as we could tell from a distance of about 3-5 miles to its NE, the sound was coming from the storm's anvil, near where the storm tower joined it from below." The May 28 storm was very similar, except that it rotated cyclonically. "Once again, the sound seemed to originate high up in the anvil, near the point where the storm's tower joined it."

See the full article here:

http://www.stormtrack.org/archive/0636.htm

And the referenced articles:

http://www.stormtrack.org/archive/0263.htm

http://www.stormtrack.org/archive/0423.htm
 
Last edited by a moderator:
Back
Top