The Alaska Aviation Weather Unit (AAWU) recently upgraded a number of their graphic weather products in ways which makes them easier to use. An arm of the National Weather Service, this unit generates the Area Forecasts, along with SIGMETS and AIRMETS for Alaska. These statewide products help us see the “big picture” regarding where icing, turbulence and poor weather are forecast for the next twelve hours or so, and are found under the GRAPHICAL FORECASTS tab at the AAWU home page: http://aawu.arh.noaa.gov/
Select the Icing Forecast, and you will notice something new!
In the past, other than the outline of the state, pilots have relied on the forecast zone boundaries as the sole means to “navigate” the charts. At least in my experience, at times it has been a challenge to figure out where weather relative to my intended route of flight. While the forecast zones (slightly subdued) are still there, the AAWU added major rivers to the products. For my money, that is a lot more useful feature for geographic reference. Kudos to the AAWU staff for adding these to the Forecast Weather, Icing and Turbulence forecasts! The Surface Chart and Prog Charts remain unchanged.
Better time resolution too!
Not as new, but worth mentioning is that a little more than a year ago the AAWU made a few other changes that make these charts easier to interpret. Instead of a single static map, the graphics now cover twelve hours, and show changes as often as every three hours, when conditions are expected to develop through the forecast period. On a Windows based system, just hover the mouse over the time intervals shown at the top of the frame, and watch the forecast areas change. On my iPad, I have to select each image individually, but the extra information showing how conditions are expected to develop is just what I am looking for. Also notice, the times on at the top of the product are local, as opposed to UTC.
For more information on how the graphic products were revised see this earlier article, but for now focus on the addition of the river boundaries. If you have comments, feel free to share them with the AAWU at the following email address: email@example.com NWS appreciates hearing from pilots, as they continue to refine the products we use to figure out when it is safe to fly.