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  2. Hong Kong rainstorm warning signals - Wikipedia

    en.wikipedia.org/wiki/Hong_Kong_rainstorm...

    Heavy rain has fallen or is expected to fall generally over Hong Kong, exceeding 50 millimetres in an hour, and is likely to continue. [1] The RED signal (Chinese: 紅色暴雨警告) gives alert about potential heavy rain that may develop into BLACK signal situations. All students are to remain at school unless there is a visible risk to ...

  3. Severe thunderstorm warning - Wikipedia

    en.wikipedia.org/wiki/Severe_thunderstorm_warning

    Considerable – to be used when hail of 1.75 inches (4.4 cm) or larger and/or winds at or above 70 miles per hour (110 km/h) is indicated by radar or observed. Destructive – to be used when hail of 2.75 inches (7.0 cm) or larger and/or winds at or above 80 miles per hour (130 km/h) is indicated by radar or observed.

  4. Weather warning - Wikipedia

    en.wikipedia.org/wiki/Weather_warning

    A weather warning generally refers to an alert issued by a meteorological agency to warn citizens of approaching dangerous weather.A weather watch, on the other hand, typically refers to an alert issued to indicate that conditions are favorable for the development of dangerous weather patterns, although the dangerous weather conditions themselves are not currently present.

  5. Particularly dangerous situation - Wikipedia

    en.wikipedia.org/wiki/Particularly_dangerous...

    repeated rounds of thunderstorms will track along the front bringing heavy rainfall. then a low pressure system will track along it into missouri and push the front further south to along the i-40 corridor monday night through tuesday night. this will shift the heavy rain axis further south to along and just north of the i-40 corridor.

  6. Severe weather terminology (United States) - Wikipedia

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

    Sleet warning WSW (alt.: heavy sleet warning) – Heavy sleet accumulations of 1 to 2 inches (2.5 to 5.1 cm) or more, which may cause significant disruptions to travel or utilities, are imminent or expected to occur within 12 hours. Discontinued beginning with the 2008-2009 winter storm season and replaced by the winter storm warning for heavy ...

  7. National Severe Weather Warning Service - Wikipedia

    en.wikipedia.org/wiki/National_severe_weather...

    Yellow means that people should plan ahead thinking about possible travel delays, or the disruption of your day-to-day activities. The Met Office is monitoring the developing weather situation and Yellow means to keep an eye on the latest forecast and be aware that the weather may change or worsen, leading to disruption of plans within the next ...

  8. Meteoalarm - Wikipedia

    en.wikipedia.org/wiki/Meteoalarm

    MeteoAlarm is designed to consistently visualise awareness information from the MeteoAlarm Members, following an easily understandable colour code of yellow, orange, and red, to ensure coherent interpretation throughout Europe. Pictograms and colour-coding convey meaning independent of the user's language. Strong winds, torrential rain, snow ...

  9. Tornado emergency - Wikipedia

    en.wikipedia.org/wiki/Tornado_emergency

    The alert for areas in Pennsylvania and New Jersey occurred as the remnants of Hurricane Ida passed through the region. [13] The tornado was rated EF1. [14] On very rare occasions, tornado emergencies have been issued by local NWS offices that either do not verify a tornado touchdown in subsequent surveys or are based on false reports.