Weather Alert in South Dakota
Red Flag Warning issued March 29 at 12:10PM MDT until March 30 at 8:00PM MDT by NWS Rapid City SD
AREAS AFFECTED: Mellette and Todd Counties
DESCRIPTION: ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 315... ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT MONDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 314, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 329, 332, AND 333... .Very dry and unseasonably warm weather will continue through Monday. For today, gusty west winds and minimum relative humidities around 13% for southern Campbell County will create critical fire weather conditions. Monday, a strong cold front will move through the area later Monday afternoon and Monday evening. Ahead of the cold front, west winds may reach 20 to 30 mph with gusts around 45 mph as minimum relative humidities drop as low as 12%. Gusty northwest winds will occur behind the cold front. The combination may create critical fire weather conditions Monday afternoon and early evening, especially considering antecedent very dry and warm weather as well as the drought. The National Weather Service in Rapid City has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 1 PM to 9 PM CDT Monday. * AFFECTED AREA...Fire Weather Zone 334 Mellette and Todd Counties. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...The combination of gusty winds and low relative humidity would produce critical fire weather conditions.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
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Weather Topic: What are Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
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