Do You Know About HEMS Tool?

When planning a flight in marginal visual flight conditions, one thing we helicopter pilots realize is that the only weather reports we get in a briefing are Aviation Routine Weather Reports (METARs) and Terminal Area Forecasts (TAFs) from airports, or Area Forecasts (FA) and Weather Synopses covering larger areas. We then have to visualize the ceilings and visibilities between those ground reporting stations. If we are going to or launching from an off-airport site, that complicates our decision-making. While Weather Depiction graphics can help, another great tool in our flight planning toolbox is the Helicopter Emergency Medical Services (HEMS) Tool from the National Weather Service.