Hell of a day! This is by
far our most favorite chase to date, and it was mainly just for the
structure. The tornado was just an added bonus. Our original target was
Iowa Falls, IA, but Joel was doing the navigating and made a very
critical decision on whether to keep heading west on I-80 toward Des
Moines (where CAPE was around 5500 and sig. tornado parameters were at
5) or shoot west through Waterloo again toward NC Iowa. The latter was
chosen. Good call Joel! I have to give credit where credit is LARGELY
due to Joel. Over the past couple of years, he has gotten us into great
position almost every single time, even when storms decided they didn't
want to do anything.
Here is the SPC tornado probabilities, saved as we were en route. Can't
remember the last time I seen THAT around here!
With the semi-new Verizon aircard, no stops were needed (what a
FREAKING relief that is) to scramble and find wireless feeds. Things
weren't looking TOO good for quite a while. Towers started going up
like crazy as we were around the Parkersburg area, but they just
weren't doing much. We stopped to top off the gas tank in Iowa Falls
and grabbed a quick bite to eat at Pizza Hut, where the lady who waited
on us seemed especially friendly once she knew we were storm chasers. I
thought that was pretty funny. We hopped back on the net soon after
eating and finally noticed a few cells starting to fire to our north.
So, on we go...
After driving for what seemed an eternity, one cell really starting to
take off. It had fantastic structure from a distance with a nice
back-sheared anvil. On radar it even had a "flying eagle" appearance. It eventually went tornado warned
as we were about 30 miles southeast of it, heading toward Mason City.
Antoher cell to our east was actually looking pretty decent too, but
not nearly as good as the other. By the way, Joel took these shots from
the passenger window. It probably isn't a great idea for me to keep
trying to take pics while I'm driving, I don't know...
When we finally caught up to it, it was still tornado warned, but
looked less impressive on radar. This is looking a tad south of due
west at the anvil canopy. We are now just north of Mason City near a
town named Fertile, IA.
WAs we neared the base, we could
see a few areas of interest, but still sort of far off on the horizon.
Soon after hitting a 4-way stop, a fire truck pulled out in front of
us. I only mention this for a later story. We eventually pull way off
of the main road, passenger door deep in grass, and put on the
flashers. I know there are quite a few concerns with chaser
irresponsibility lately, and I don't want to tarnish our "hobby" any
more than it already has been.
Sort of disorganized wall cloud with no visible rotation. It really
didn't look all that impressive.
Looking back to the east at the anvil as Joel films the stuff behind
me.
Here and there, it started to gain a few impressive qualities, but
still no visible rotation. If it was, it was very weak. I'm not really
sure what else it needed to keep going here. If I had to guess, I'd say
lack of inflow, but who knows. This same storm had a history of
producing tornadoes about 1/2 hour before we got to it, and there were
more storms firing just to the southwest, so that'd be my guess.
We picked up and jetted a bit further north as the storm was pulling
away. Soon after, the disorganized wall cloud from before started to
look MUCH better. This time we could see rotation, but it just couldn't
muster up the juice to produce.
But, it sure didn't last long. It quickly dissipated into virtually
nothing and it was apparent the storm was done producing. The radar
scans showed it looking pretty crappy too. But, the new storm to it's
southwest was starting to look VERY good. A new, classic looking hook
formed on the southwestern edge so we quickly bolted off toward it.
Upon nearing it, we could start making out the base and what appeared
to be a wall cloud or something. We had no idea what sort of structure
this beast actually contained. We pulled off on a south-facing gravel
back road and watched this sucker in awe as it barreled toward us. A
nice, elongated beaver tail wrapped into the base as we could see the
ENTIRE structure spinning like a stop. Incredible.
In....in......IOWA?!?!? I never would have thought we'd see this type
of structure this far north.
Here's a short timelapse video of this storm. Too bad we couldn't have
sat here longer to get more video. In this, you can really see the
whole storm motion well. Good stuff......good stuff.
It was quickly gaining on us and we had to make a move. We bolted south
down the same road trying to get a bit south of it. Just to the right
of the middle in the picture below, that little area of rotation was
quite noticable. But, once again, we didn't pull too far south of it as
it quickly gained on us again. Dangit. This area would have been
PERFECT for something to drop too as the contrast was prime, with nary
a house or farm in the way.
So, we get back in, drop even further south. As we were driving, we
noticed a little spin-up in the dirt field, but our view was, of
course, blocked by a row of trees and other obstructions. Once we
busted back out into view, we could clearly see a tornado taking place.
The only problem was, the RFD was DIRECTLY behind this and was apparent
it was going to swallow it up very soon. We were pretty surprised as to
how close the rear flank trailed the tornado, but it was evidently what
it needed to get it spinning.
You can clearly see the funnel in this shot below. You can see it in
the one above too, but definitely not as well. This was shot with a
wide angle lens, so it actually looks alot further away than it was.
Our best guess was about a 1/4 mile away, probably less. It was
definitely trying to give us the full condensation tube, but the RFD
just wouldn't allow that to happen for us. Oh well. Still a no doubter.
Here's a quick video. Again, the sound had to be muted in order for me
to upload it to YouTube. Like the Cameron video, it would have taken
half of my freaking hard drive just to save a two minute video with
sound. Crazy.