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Posted by Martin UP
on 6/16/2012, 8:08 am, in reply to "Thursday update"
173.87.125.127
Lift started at 0930 AM, 2-3K Net to 3500 ft MSL. Took 3 Instruction flights with Drew getting his Annual checkride, McKeeby's getting 2 long flights (last flights were 9 months ago!)
My flight in the ASW-20C was 3.5 hrs, went 156 nm per the GPS. Lift was choppy and weak below 3500 ft 2K avg , then improved to 3-4K net above to 5500 ft around Dansville. South and East bases got to 6500ft - most of the day a band between 3500 to 5500 ft worked under cloud. Tried several times to get to Hornell from Cohocton...nothing in the blue.
Neat flying all over the skies with 4 other guys in their fibreglas cocoons.
Geoff Cline flew Doug's Pegasus very well getting to 6500 in the blue over the ridge at the end of the day on a street. Winds were out of the East at altitude, SE in thermals, and NW on the field most of the day.
--Previous Message--
: Today is the day of the earliest sunrise for
: KDSV. Strong sun = strong thermals? Hell
: no, you need lots more. As in good lapse
: rate, best maintained by continuing cold
: advection. Last night's sounding reveals the
: great conditions Doug C reported
: on...textbook dry adiabatic up to about 4K
: (a bit lower than he got due to the Buffalo
: sounding being near Lake E). But we ain't
: gonna get that cold advection today. The
: latest winds aloft forecast for today (10 AM
: to 7 PM) shows two major problems:
: (1) The winds from the surface to ~ 3 K are
: ENE, and modest at < 12 mph. That means a
: fetch over Lake O, with a long residence
: time due to the slow flow. Which allows
: more time for thermal equilibrium with the
: lake water surface. How warm (read: cool) is
: the lake? Here's a great tool:
:
:
: http://www.crh.noaa.gov/greatlakes/?c=tmp&l=lo&p=a
:
: Note the wind direction, and the temperature
: which is ~ 68 max. Which means it will
: counteract the sun's attempt at warming it.
: Area forecast matrices have only 71 by 2 PM
: for Geneseo. If you follow that up a dry
: adiabat with this morning's sounding, you
: get to....< 4 K, before hitting a big
: inversion.
: (2) The forecast winds for 6K are 12 mph @
: 140 , compared with 12 mph @ 080 for 3K.
: That means the winds are veering to SE with
: height...which means warm, stabilizing
: advection.
: Hate to be negative, but there's a third
: problem. The latest Rapid Refresh output has
: cirrus most of the day.
:
: Hey the morning sounding just came in!
: Dictating no change whatsoever in the above
: discussion.
:
: Bottom line: you will work harder to stay up
: than yesterday afternoon. Much harder.
: Anyone who sustains longer than 2.5 hours
: gets a quart of not-from-concentrate OJ.
: Anyone who makes it to HH and back (without
: a relight!) get an FLSC T-shirt.
:
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