Weather Alert in California
Special Weather Statement issued July 29 at 8:48PM PDT by NWS Eureka CA
AREAS AFFECTED: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt
DESCRIPTION: ...TSUNAMI WARNING IS IN EFFECT FOR COASTAL DEL NORTE AND THE NORTH HUMBOLDT COAST.... * LOCAL IMPACTS... A tsunami with significant widespread inundation is expected, with possible and dangerous coastal flooding accompanied by powerful currents. * RECOMMENDED ACTIONS... If you are located in this coastal area, move to higher ground. Stay out of the water, off the beach and away from harbors, marinas and bays. Do not go to the coast to watch the tsunami. Be alert to instructions from your local emergency officials. * FORECAST TSUNAMI START TIMES... Fort Bragg California 1150 PM PDT on Jul 29 Crescent City 1150 PM PDT on Jul 29 Tsunamis often arrive as a series of waves or surges which could be dangerous for many hours after the first wave arrival. The first tsunami wave or surge may not be the highest in the series. * FORECAST TSUNAMI DURATION... Fort Bragg California 9 hrs Crescent City 36 hrs * FORECAST PEAK TSUNAMI WAVE HEIGHTS... Fort Bragg California 0.7 to 1.3 ft Crescent City 2.6 to 4.8 ft * PRELIMINARY EARTHQUAKE INFORMATION... An earthquake occurred with a preliminary magnitude of 8.8. * TIDE INFORMATION... Humboldt Bay North Spit...Low tides of 1.3 ft at 901 AM PDT on Jul 30, and 1.8 ft at 1008 PM PDT on Jul 30. High tides of 6.2 ft at 343 PM PDT on Jul 30, and 4.7 ft at 358 AM PDT on Jul 31. Crescent City Harbor...Low tides of 1.3 ft at 854 AM PDT on Jul 30, and 1.8 ft at 1002 PM PDT on Jul 30. High tides of 6.3 ft at 329 PM PDT on Jul 30, and 4.7 ft at 349 AM PDT on Jul 31. This product will be updated as new information becomes available. Stay tuned to your local news source and NOAA weather radio for further information and updates.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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