Tag Archive

Answers: Finding wind data

By Jack Williams ©2015

Q: What is your favorite source for near real time surface wind visualizations in the mid Atlantic region. I need the information for balloon flight planning in the field. Curt, Falls Church, Va. A:  I’ve yet to find any really good visualizations for surface winds because none show the winds in any real detail. That said,  best that I've found are NWS... »

Answers: Aircraft altimeter errors

By Jack Williams ©2015

Q: Can you help me understand in very simple terms altimeter error when flying from high to low pressure areas and from low to high areas?  I am studying it but its just not clicking.—Mark, Noblesville, Ind. A: To answer  your question I'll begin with some basic information about aircraft altimeters and then use the diagram below to help you see... »

Pilot answers: Upper air data and forecasts

By Jack Williams ©2015

Q: I use RUC soundings for flight planning, but I am befuddled by the following: When I enter a station, load the Op40 soundings, and hover with my mouse over the loaded graph I see  bold numbers on the far-left near the Pressure (mb) line, and light numbers appear directly underneath my cursor with a dynamic pink line drawn from... »

Aviation Contributes to Better Forecasts

By Jack Williams ©2015

This column originally appeared in the June 2005  issue of Flight Training Magazine. ©By Jack Williams and Flight Training Magazine.  All Rights Reserved Piecing together weather Aircraft weather data alphabet soup Here are some of the acronyms for aircraft weather data systems. ACARS: Aircraft Communication Ad-dressing and Reporting System, operated for the airlines by Aeronautical Radio Inc. (ARINC) -- the communications link between pilots... »