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  2. Harmattan - Wikipedia

    en.wikipedia.org/wiki/Harmattan

    This season differs from winter because it is characterized by cold, dry, [4] dust-laden wind, and also wide fluctuations in the ambient temperatures of the day and night. Temperatures can easily be as low as 9 °C (48 °F) all day, but sometimes in the afternoon the temperature can also soar to as high as 35 °C (95 °F), while the relative ...

  3. Maximum sustained wind - Wikipedia

    en.wikipedia.org/wiki/Maximum_sustained_wind

    In most tropical cyclone basins, use of the satellite-based Dvorak technique is the primary method used to estimate a tropical cyclone's maximum sustained winds. [5] The extent of spiral banding and difference in temperature between the eye and eyewall is used within the technique to assign a maximum sustained wind and pressure. [6]

  4. Downburst - Wikipedia

    en.wikipedia.org/wiki/Downburst

    Downburst damage radiates from a central point as the descending column spreads out when hitting the surface, whereas tornado damage tends towards convergent damage consistent with rotating winds. To differentiate between tornado damage and damage from a downburst, the term straight-line winds is applied to damage from microbursts.

  5. Gale warning - Wikipedia

    en.wikipedia.org/wiki/Gale_warning

    The National Weather Service issues a similar high wind warning (Specific Area Message Encoding code: HWW) for high winds on land. The criteria vary from place to place; however, in most cases, the warning applies to winds of 40 miles per hour (64 km/h) to 73 miles per hour (117 km/h) for at least 1 hour; or any gusts of 58 miles per hour (93 ...

  6. Ventifact - Wikipedia

    en.wikipedia.org/wiki/Ventifact

    The wind direction at the time the ventifact formed will be parallel to grooves or striations cut into the rock. Ventifacts have also been discovered on Mars, where such sharp immobile rocks have caused significant damage to the wheels of the Curiosity rover. [4] An example of a Martian ventifact was named Jake Matijevic.

  7. Severe weather terminology (United States) - Wikipedia

    en.wikipedia.org/wiki/Severe_weather_terminology...

    The wind speeds must not be directly associated with a tropical cyclone. Hurricane force wind watch NPW – Sustained surface winds or frequent gusts of 64 kilometres per hour (40 mph; 35 kn) or greater are forecast. The expected occurrence, location and/or timing of the wind event may be uncertain but is forecast to take place within the next ...

  8. Enhanced Fujita scale - Wikipedia

    en.wikipedia.org/wiki/Enhanced_Fujita_scale

    Although the wind speeds and photographic damage examples have been updated, the damage descriptions given are based on those from the Fujita scale, which are more or less still accurate. However, for the actual EF scale in practice, damage indicators (the type of structure which has been damaged) are predominantly used in determining the ...

  9. Dust devil - Wikipedia

    en.wikipedia.org/wiki/Dust_devil

    Dust devils typically do not cause injuries, but rare, severe dust devils have caused damage and even deaths in the past. [9] One such dust devil struck the Coconino County Fairgrounds in Flagstaff, Arizona , on September 14, 2000, causing extensive damage to several temporary tents, stands and booths, as well as some permanent fairgrounds ...

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