Weather Alert in California
Special Weather Statement issued July 30 at 7:28AM PDT by NWS San Francisco CA
AREAS AFFECTED: San Francisco; Coastal North Bay Including Point Reyes National Seashore; North Bay Interior Valleys; San Francisco Bay Shoreline; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
DESCRIPTION: ...TSUNAMI ADVISORY IS IN EFFECT FROM THE SONOMA COASTLINE DOWN THROUGH THE BIG SUR COASTLINE INCLUDING SF AND MONTEREY BAY... * UPDATES... There have been no significant changes since the last statement. * LOCAL IMPACTS...Dangerous currents and fast tidal swings will persist through the morning due to impacts from an ongoing tsunami event. These conditions are hazardous to swimmers, boats, and coastal structures. Widespread inundation is NOT expected. However, damage at the harbors is possible. Surging water in and out of harbors and changing water levels can cause boats and docks to detach from structures. * RECOMMENDED ACTIONS... If you are located in this coastal area, move off the beach and out of harbors and marinas. Do not go to the coast to watch the tsunami. Be alert to instructions from your local emergency officials. Tsunamis often arrive as a series of waves or surges which could be dangerous for many hours after the first wave arrival. * FORECAST TSUNAMI DURATION...The Advisory remains in effect until further notice. * OBSERVED TSUNAMI WAVE HEIGHTS FROM EARLIER... San Francisco 1.2 ft at 0224 AM PDT on Jul 30 Point Reyes California 2.6 ft at 0423 AM PDT on Jul 30 Monterey California 1.5 ft at 0424 AM PDT on Jul 30 Richmond California 0.8 ft at 0241 AM PDT on Jul 30 Alameda California 1.2 ft at 0247 AM PDT on Jul 30 Redwood City California 0.6 ft at 0425 AM PDT on Jul 30 * PRELIMINARY EARTHQUAKE INFORMATION... An earthquake occurred with a preliminary magnitude of 8.8. 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.
INSTRUCTION: N/A
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Weather Topic: What is Evaporation?
Home - Education - Precipitation - Evaporation
Next Topic: Fog
Evaporation is the process which returns water from the earth
back to the atmosphere, and is another crucial process in the water cycle.
Evaporation is the transformation of liquid into gas, and it happens because
molecules are excited by the application of energy and turn into vapor.
In order for water to evaporate it has to be on the surface of a body of water.
Next Topic: Fog
Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
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