June 2nd 08, 04:28 PM
posted to rec.aviation.ifr,rec.aviation.piloting
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Iis there a weather chart with cloud base and tops depicted?
TWEB products have been discontinued.
Bob Gardner
"Larry Dighera" wrote in message
...
On Fri, 30 May 2008 09:39:00 -0700, Terence Wilson
wrote in :
Here in the San Francisco Bay Area we've had coastal clouds in the
mornings with ceilings in the 1000-2000 range recently, 10-20 miles
west of Oakland the clouds dissipate completely. I was wondering
weather there exists a reliable way of determining the cloud tops
(other than PIREPs).
TIA
A little research yielded this information:
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/702ef0bfe021ab3986256bb2005c1458/$FILE/sec1-5.pdf
In addition, pilots are a vital source of upper-air weather
observations. In fact, aircraft in flight are the only means of
directly observing turbulence, icing, and height of cloud tops. For
more information on PIREPs, see Section 3. Recently some US and other
international airlines have equipped their aircraft with instruments
that automatically send weather observations via a satellite downlink.
These are important observations which are used by NCEP in their
production of forecasts. 1999
http://adds.aviationweather.noaa.gov/pireps/java/
PIREPs Java Tool
http://aviationweather.gov/obs/radar/
Radar Coded Message Composite Image with Tops
http://www.crh.noaa.gov/gjt/?n=tweb
Transcribed Weather Broadcasts
http://www.srh.noaa.gov/srh/cwwd/faqs/twb.htm
TRANSCRIBED WEATHER BROADCAST ROUTE FORECAST
To assist pilots in preflight and enroute planning. The forecast
provides expected conditions (sky condition, cloud tops, surface
visibility, weather and obstructions to visibility, and significant
surface wind) along and 25 nautical miles either side of a specified
route. TWEB route forecasts are disseminated via appropriate Federal
Aviation Administration (FAA) communications systems,including low
frequency navigational aids.
CONTACT: Judson Ladd, W/SR1x2
Regional Aviation Meteorologist
(817) 978-2652 Ext. 109
Inquire he
http://www.weather.gov/tg/radarimage.html
The NCEP/AWC composite image is produced which includes aviation used
cloud tops, convective sigmets, and outlooks.
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