Tag Archive

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... »

Snowy science lessons

By Jack Williams ©2015

From the afternoon of Friday, Feb. 5 through the afternoon of Tuesday Feb. 9, I spent roughly eight hours shoveling snow, thanks to the record-breaking "Snowmageddon" that brought two to three feet--in some cases even more--of snow to the Washington, D.C. area. Shoveling snow is a good time to think about the science of winter storms, ice, and even some basic... »

Answers: Weather Radar

By Jack Williams ©2015

Q: I have been reading your column in AOPA Flight Training magazine for several years and I wanted to let you know you have inspired me to become very interested in the weather and especially how it effects my flying. My question is about where I can find the raw SD radar weather reports.  I see them briefly mentioned in... »

Ask Jack: Wind Chill

By Jack Williams ©2015

Q:  If the temperature is above 32 degrees and the wind chill is below 32 degrees, will water freeze? —Kirsten H., Somerville, MA A:  No. Most people are aware that they feel colder when the wind is blowing, but this is because the wind carries away the layer of air around you that your body’s heat has warmed. The big danger of air... »

A Great Time for Weather Weenies

By Jack Williams ©2015

The timely updates on severe weather events that most National Weather Service offices now publish on their Web sites are one of the reasons why I say on page 6 of The AMS Weather Book that, “We are living in a golden age for those who consider themselves weather weenies (i.e., those for whom weather is a passion bordering on... »