Well, I just completed my quarterly trip home, from Oakland to Phoenix, to
visit our family. It was chock full of some new weather experiences for
me, and I thought I’d share. Our plane is a Turbo 210 (non pressurized).
We’ve done this trip a number of times, and, surprisingly, weather has
really never come into the picture. Nonetheless, of course, I got the
full briefing the night before which indicated pretty-severe VFR the whole
way. The only exception was going to be the need for an IFR departure to
get out of the cloud blanket covering OAK. No big deal, as I fly IFR in
VMC anyway when the family’s aboard. We were going to be leaving by about
8:00 to avoid any possible afternoon storm buildups or ground heating over
Arizona. A quick morning update showed basically no change.
My first clue of unpredicted weather was that OAK was VFR enough for us to
get out without getting our clearance. I always hope for this, as the IFR
departure route is somewhat circuitous and adds much time/fuel to the
journey. I always have a backup filed from a VOR just south of the bay
that goes the rest of the way to Phoenix. OAK center is always more than
happy to clear me for this.
The sky starting turning that weird gray color, and winds were more
southerly than predicted. About halfway to Palmdale (PMD), I tried to get
flightwatch and was unsuccessful. In fact, there were a few of us on 22.0
all trying to get through and nobody could. On reporting back on
frequency, I said "23F is back on frequency… I was unable flightwatch."
He said, just as calmly as you could imagine, "Yeah, I guess they’re
having some pretty bad weather down there." I said, "Down where?!?!?!" I
had been listening to a hiwas a bit ago that said nothing. He then read
me a convective sigmet that was just being released that covered the whole
area between PMD, Palm Springs (PSP), LA, and San Diego. Thunderstorms
moving in from the south, tops to 20. I was thrilled.
I dialed up the nearest hiwas and sure enough, it was now broadcasting the
sigment.
I took another couple of minutes off-frequency to try to get ahold of an
FSS to see if there was any specific news. Bakersfield radio said, "What
convective sigmet?" I swear, they had NO record of it. He told me that
everything ahead should be way clear. Right. This, to me, was just about
the most amazing thing of the whole trip. He went back 4 times to try to
find any information about upcoming storms and could find nothing. I
said, "I was just listening to hiwas which WAS talking about storms." All
he could tell me was that, since I was currently with the approach control
from a naval air station, "Maybe they have a different idea of what a
convective sigmet is." Go figure.
I started planning. For each segment of the route, I started figuring out
where we would land if it became apparent that our route was going to be
blocked off. Let me recommend to all that, if you don’t normally do this
on a long trip, find good intermediate stopping points should weather move
in unexpectedly. Sure, I had plans based on the legally-based alternate
rules for arrival, but I’m talking about finding a good waiting point for
the whole family. We passed an airport every 3-5 minutes, but which ones
had hotels, food, etc…, that would make for a good waiting stop…
possibly overnite? I pulled out my california airport guide and started
checking out each airport we passed. This was plenty to do while I was
also watching the weather develop and talking to controllers, flight
watch, and FSS outlets. This would not have been possible in an IMC
environment.
As I was passed off to LA center, I started using the controllers. The
first guy told me that he had just diverted some commuters a little south
of PMD, but I told him I could see to PMD and it looked OK (just that gray
crap everywhere). He said the next controller would have more info.
The next guy was talking with a jet passing PSP who was reporting stuff
starting to build there. I asked for, and got, a northerly diversion from
what I could see was a gray-turning-to-black area RIGHT over PSP. I was
concerned, given the report of south to north movement, that this might
put me into stuff I could not see yet (visibility was about 25 miles), but
I was entirely prepared to land as soon as I saw any type of blockade. I
kept careful view on my backside to make sure I wasn’t going to be
surrounded. There was nothing happening there. It really looked like the
stuff over PSP was pretty stationary, and that I was going to be able to
make it fine.
After about 50 miles, I asked for, and got, direct to Blythe (GPS direct)
which put me back on my original path. I could see nothing more really
ahead (except the really weird gray stuff all over), and a new call to
flight watch confirmed that there was nothing ahead. Whew! As it turned
out, the ACTUAL weather was never as bad as the sigmet was predicting
(luckily). However, the tension level had been significantly raised.
We descended out of 15 for 13, and this led me to think about something
else I really hadn’t considered before… the heat. Yeah, it was warm out
there. In fact, I computed that density alt, when we were indicating
15000, was really over 18000! Sure, the plane had a field day and loved
it, but all of our O2 flow guages were set on 15, not 18. Even at the
O2-richer 13000, where my kid ripped off her O2 mask (which she enjoys
wearing by the way), the density alt was still about 16000! After a few
minutes, she started complaining of being a "little hot" and
uncomfortable. That’s when it hit me, and we put her back on the O2.
Thankfully, the rest of the trip went fine, and we did arrive early enough
to avoid ground bumps. Due to the non-helpful winds, we took 3:43 to get
there. Oh well.
I know you all know this already, but let me just summarize a couple of
suggestions:
A. On a long family trip, plan for weather wait-out spots from both
an IFR (approach, minimums, etc…) view, AND a "will the family
be happy there" view.
B. Remember density altitude’s affect on your BODY. If it’s really
hot and you don’t have O2, a long trip over 10000 is going to be
interesting.
C. Think twice about information you get from the FSS, even "real
time" info. Double check against other sources. And, even
predictions of "bad" weather can still leave lots of travelling
room.
D. Winds being more southerly than predicted really IS an indicator
of bad things to come.
E. When times start to get tough, controllers can be some pretty
helpful people (if you’re IFR). Sub-suggestion: Fly IFR! VFR
guys were being denied flight-following left and right since
the controllers were busy.
–
Eric Wagner PP-ASEL-IA
Ithaca Software Turbo Centurion N3423F
e…@ithaca.com Oakland Flyers