Posted on 09/29/2009 7:01:04 PM PDT by CedarDave
...A TSUNAMI ADVISORY IS IN EFFECT WHICH INCLUDES THE COASTAL AREAS OF CALIFORNIA AND OREGON FROM THE CALIFORNIA-MEXICO BORDER TO THE OREGON-WASHINGTON BORDER...
RECOMMENDED ACTIONS A TSUNAMI HAS BEEN GENERATED WHICH COULD IMPACT THE ADVISORY REGIONS LISTED IN THE HEADLINE. PERSONS IN LOW-LYING COASTAL AREAS SHOULD BE ALERT TO INSTRUCTIONS FROM THEIR LOCAL EMERGENCY OFFICIALS. EVACUATIONS ARE ONLY ORDERED BY EMERGENCY RESPONSE AGENCIES. - PERSONS IN TSUNAMI ADVISORY AREAS SHOULD MOVE OUT OF THE WATER... OFF THE BEACH AND OUT OF HARBORS AND MARINAS.
FORECASTS INDICATE THAT A TSUNAMI WITH AMPLITUDES IN THE RANGE OF 20 TO 65CM IS EXPECTED ALONG THE CALIFORNIA AND OREGON COAST. TSUNAMIS OF THIS AMPLITUDE CAN GENERATE STRONG CURRENTS DANGEROUS TO THOSE VERY NEAR OR IN THE OCEAN. THE TSUNAMI IS EXPECTED TO BUILD AND REACH ITS MAXIMUM APPROXIMATELY ONE AND A HALF HOURS AFTER THE INITIAL ARRIVAL. TSUNAMI ARRIVAL TIMES AND OTHER AMPLITUDE FORECASTS ARE LISTED IN THE WEB SITE BELOW.
...A TSUNAMI ADVISORY IS IN EFFECT WHICH INCLUDES THE COASTAL AREAS OF CALIFORNIA AND OREGON FROM THE CALIFORNIA-MEXICO BORDER TO THE OREGON-WASHINGTON BORDER...
PERSONS IN TSUNAMI ADVISORY AREAS SHOULD MOVE OUT OF THE WATER... OFF THE BEACH AND OUT OF HARBORS AND MARINAS.
TSUNAMI ADVISORIES MEAN THAT A TSUNAMI CAPABLE OF PRODUCING STRONG CURRENTS OR WAVES DANGEROUS TO PERSONS IN OR VERY NEAR WATER IS IMMINENT OF EXPECTED. SIGNIFICANT WIDESPREAD INUNDATION IS NOT EXPECTED FOR AREAS IN AN ADVISORY. TSUNAMIS ARE A SERIES OF WAVES POTENTIALLY DANGEROUS SEVERAL HOURS AFTER INITIAL ARRIVAL TIME. ESTIMATED TIMES OF INITIAL WAVE ARRIVAL FOR SELECTED SITES IN THE ADVISORY ARE PROVIDED BELOW.
SANTA BARBARA-CA 2111 PDT SEP 29 SAN FRANCISCO-CA 2131 PDT SEP 29 LA JOLLA-CA 2116 PDT SEP 29 CHARLESTON-OR 2132 PDT SEP 29 CRESCENT CITY-CA 2120 PDT SEP 29 SEASIDE-OR 2205 PDT SEP 29
Get out on the board dude! You can have bragging rights how you rode a real live Tsunami!
... A tsunami advisory is in effect for Orange County and San Diego County coastal areas...
There is no Tsunami Watch or warning in effect at this time for the extreme southwestern California coast. However... dangerous currents and surges are possible in the local harbors and bays.
Forecasts indicate that a tsunami with amplitudes in the range of 15 to 20 centimeters (6 to 8 inches) is expected along the Southern California coast.
The tsunami threat is forecast to begin in coastal San Diego and Orange counties around 916 PM this evening... then build to its maximum height between 1015 and 1045 PM before subsiding.
Coastal residents are advised to stay out of the water... off the beach... and away from harbors and marinas. Wave heights and currents are amplified by irregular shoreline and are difficult to predict. The initial wave may not be the largest. Later waves may be larger. Mariners in water deeper than 600 feet should not be affected.
A tsunami advisory means that a tsunami capable of producing strong currents or waves dangerous to persons in or very near the water is imminent or expected. Significant widespread inundation is not expected for areas under the advisory. Currents may be hazardous to swimmers... boat... and coastal structures and may continue for several hours after the initial wave arrival.
The tsunami advisory is a result of the 8.0 earthquake that occurred at 10:48 am PDT near the samoan islands.
Stay tuned to your local media source or NOAA Weather Radio for later developments.
This product will be updated when new information becomes available. http://www.wunderground.com/US/CA/043.html#SPE
I pulled a bale off a San Diego beach in the 70s. It was worthless — the saltwater ruined it, and God only knows how many days or weeks it had been drifting in the current.
Was the Great SF Quake 8 or 9?
Weather underground lowered the amplitude: 15 to 20 centimeters (6 to 8 inches)
The NWS has it at 20 to 65cm
I have a feeling this is a non-event for the continental coast. But I bet the local news stations pimp it out all they can.
These things are very hard to predict. A two foot tsunamai doesn’t sound like much, but it depends how wide it is. If it’s really wide, then it will build up to much greater heights as the water gets shallower. It also can be compressed if it enters into the right shaped bay, as tides regularly do in the Bay of Fundy.
I wouldn’t expect too much on the west coast from that distance, but no point in standing around on the beach when it hits.
In Chile in 1960 .... a 9.5
I thought with a tsunami it isn’t the size of the waves but the surging of the water and then the outsurge that is so devastating and destructive? The one that hit Indonesia a few years ago didn’t even cover some people’s heads on land (there are videos taken at hotels) but it killed how many people and caused so much damage. It isn’t a tidal wave, that’s the deceptive thing.
You need to ask? Well, of course our European cousins have always been our betters, so it follows that we should bend over backward to emulate everything they do.
If you hadn't noticed, you'll almost never hear a university trained egghead using anything but the metric system when describing dimensions, distances, or volumes.
It's become something of a liberal flag. Americans who use the metric system in conversation are almost assuredly pompous libs.
And Alaska 1963.
What's this? Is this a bit of inside NOAA humor, or do these guys really not realize how far Downtown LA is from the beach?
What's this? Is this a bit of inside NOAA humor, or do these guys really not realize how far Downtown LA is from the beach?
A non-event here on FR. The mod just took it down from Breaking News.
All tidbits of insider esoteric knowledge aside,
dynamic wave/beach areas can and do frequently exhibit sudden increase in water level of 2-3 ft or more from the surge of an increasing tide and sudden increase in wave size
from offshore storms. Thats normal! We get unusual events from offhsore storms driving into shore with 20ft seas that are much more bigger of deal, but the coast and people handle it year in and year out. Repeat, All fear mongering aside, This tsunami is strictly a non-event.
Any connection with the tsunami in American Samoa today, I wonder?
“An International Tsunami Survey Team (ITST) studying the effects of the December 26 tsunami on Indonesia’s island of Sumatra documented wave heights of 20 to 30 m (65 to 100 ft) at the island’s northwest end and found evidence suggesting that wave heights may have ranged from 15 to 30 m (50 to 100 ft) along a 100-km (60-mi) stretch of the northwest coast. These wave heights are higher than those predicted by computer models made soon after the earthquake that triggered the tsunami.”
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