A blog about weather, climate, and science. Occasionally, we'll post on other topics of interest.
Saturday, May 27, 2017
Major Severe Thunderstorm and Tornado Period Ahead
Unfortunately, it looks like it is going to be a severe weather day as forecast. This forecast is valid from now until 7am Sunday. We'll break things down as follows.
On this forecast map, 5% (brown) is the significant threshold for tornadoes. The hatched area is where violent tornadoes are forecast to occur.
Damaging Thunderstorm Winds
Wow. In the hatched area, thunderstorm-generated wind gusts may exceed 75 mph. Needless to say, bring in anything that may be blown about (i.e., lawn furniture, etc.). The significant threshold on this map is 15% (yellow). In the non-hatched areas, wind gusts may exceed 60 mph.
There is no much instability in the atmosphere that, in the hatched area, hail size might exceed 4 inches. The significant threshold on this map is 15% (yellow) which forecasts hailstones of 1" or more. Obviously, put your car in the garage.
I will not live-blog the storms but I will provide a couple of updates today. Please take these forecasts seriously and plan accordingly.