On Dec 21, 10:53*pm, Mike the Strike wrote:
On Dec 21, 5:36*pm, Skywalker wrote:

On Dec 21, 3:16*pm, Bob wrote:

Today, being the first day of Winter, the Tucson NOAA site's soaring
forecast for Tucson sure looks chilly. *http://www.wrh.noaa.gov/twc/aviation/PHXWRKSRG.php
Check out the first useable lift temp! * One might say it will be a
cold day in hell if any soaring takes place....
Forget the bug wipers, how about leading edge de-icers.

19

Would hate to see it actually hit absolute zero! But with the max temp
being over 500 deg hotter than the first usable temp, should be some
BOOMING THERMALS!

-Eric

Those 10 feet/min thermals would really kick butt!

Mike

As the url changes daily, for those who missed yesterday's NOAA Tucson
soaring forecast post, here tis:

UXUS97 KTWC 211340
WRKSRG

SOARING FORECAST FOR TUS DATE...12/21/10...12Z

THERMAL INDEX....MINUS SIGN INDICATES INSTABILITY
5000 FT ASL........0.0
6000 FT ASL........0.0
10000 FT ASL........0.0
15000 FT ASL........0.0

HEIGHT OF THE - 3 INDEX...0 FT ASL
TOP OF THE LIFT...........0 FT ASL
TUS MAX TEMPERATURE.......74 DEGREES F
FIRST USABLE LIFT.........-459 DEGREES F
MAXIMUM LIFT..............54 FT/MIN

pretty good differential between first useable life and max temp....
HANG ON!