Demonstration of Legal Description Map for Garmin GPSMAP Units
Display of the Legal Description GPS Map for Garmin GPSMAP units such as the 176, 176C, 276C, 376C, 378, 478C, 196, 296, 396, 496 GPS Units ...
Lightning sensors thwart forest fire flare-ups
If lightning comes with volley, how does it start fires?Mick Rice of Ontario's Ministry of Natural Resources says there are a mob of “dry lightning” scenarios that can spark a blaze.
One that occurs rarely in Ontario, but more often in drier areas such as the Northwest Territories, involves lightning from big thunderclouds squiffed above the ground during hot weather. Under those circumstances, the rain unleashed by the clouds may evaporate before it hits the ground.
In Ontario, dry lightning most often occurs when a lightning poop out lashes out of the side of a cloud, landing away from the rainstorm itself. Fire will be "almost instantaneous," Rice said.
However, more often the cause of these fires is that lightning, accompanied by cloudburst, strikes well into the undergrowth, causing it to smoulder deeper than the rain can penetrate. When the surface layers dry off after a few days, the smouldering fire can line its way to the surface. That can take up to a week after the lightning strike itself.
