When is Big Wind Day? Always April 12th!
Origin of this Holiday
Big Wind Day commemorates the highest wind speed ever recorded on the planet / which was April 12, 19 34.
This holiday is an American holiday celebrated each and every year on April 12th.
Our research did not find the creator, or the origin of this day. We did however find that this holiday has been celebrated for years. There is plenty of documentation to support that this holiday does indeed exist.
This holiday is referred to as a "National" day. However, we did not find any congressional records or presidential proclamations for this day. Even though we didn't, this is still a holiday that is publicized to celebrate. So have fun with it and celebrate it!
We found recognition about this holiday from:
Calendar sites and personal Internet sites that blog and share information about this holiday.
How is this holiday celebrated?
- School Activity: Many grammer schools will take the students outside to get a good feel of the wind. This day is a day to learn about the wind-
Highest Wind Speed:
"The highest surface wind speed ever officially recorded is 372 km/h (231 mph) at the Mount Washington (New Hampshire) Observatory in the US on 12 April 1934, using a heated wire anemometer. The anemometer was later tested by the US National Weather Bureau and confirmed to be accurate. The highest surface wind speed ever officially recorded in Asia was recorded in Afghanistan on 14 August 2008: 328 km/h (204 mph) in Ab-Paran, Ghowr."
"A higher windspeed recorded at 380 km/h (236 mph) during Typhoon Paka in 1997 in Guam was declared invalid because the instrument was damaged during the storm and could not later be checked for accuracy."
"Windspeeds within certain atmospheric phenomena (such as tornadoes) may greatly exceed this value but have never been accurately measured. The figure of 509 km/h (316 mph) during the F5 tornado, Moore in Oklahoma, USA is often quoted as the highest surface wind speed but was measured 30 m (100 feet) above ground."
Factors affecting wind speed
"Wind speed is affected by a number of factors and situations, operating on varying scales (from micro to macro scales). These include the pressure gradient, Rossby waves and jet streams, and local weather conditions. There are also links to be found between wind speed and wind direction, notably with the pressure gradient and surfaces over which the air is found."
"Pressure gradient is a term to describe the difference in air pressure between two points in the atmosphere or on the surface of the Earth. It is vital to wind speed, because the greater the difference in pressure, the faster the wind flows (from the high to low pressure) to balance out the variation. The pressure gradient, when combined with the Coriolis Effect and friction, also influences wind direction."
"Rossby waves are strong winds in the upper troposphere. These operate on a global scale and move from West to East (hence being known as Westerlies). The Rossby waves are themselves a different wind speed from what we experience in the lower troposphere."
Local weather conditions play a key role in influencing wind speed, as the formation of hurricanes, monsoons and cyclones as freak weather conditions can drastically affect the velocity of the wind."