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Blue Moon appears Friday night

SACRAMENTO, CA - Friday night will bring the second full moon of the month. This is popularly referred to as a blue moon, but this definition has only recently come about.

It was perpetuated by a 1946 article in Sky & Telescope magazine. The traditional definition comes from the Maine Farmer's Almanac. It states that the blue moon is the third full moon in a season of four full moons. So why two definitions?

The more recent definition was a mistake. An amateur astronomer, James Hugh Pruett, mistakenly wrote an erroneous definition some 60 years ago in Sky & Telescope magazine. The author referred to the second full moon of the month as a "blue Moon." The idea caught on and spread, so much so that most people use this definition over the traditional one relating to the Christian calendar.

This Week's Weather StreetCasts Event Presented by Your Northern California Honda Dealers

This Week's Weather StreetCasts Event Presented by Your Northern California Honda Dealers

The poll is closed for this week.  We thank these events and our viewers for participating!

This week's event picks were: 

Folsom Pro Rodeo

Loomis Basin Has Talent FINALE!

Vacaville: Fashion for Freedom Fashion Show

 

AND,  Vacaville: Fashion for Freedom Fashion Show

VOTE for This Week's Weather StreetCasts Event Presented by Your Northern California Honda Dealers

VOTE for This Week's Weather StreetCasts Event Presented by Your Northern California Honda Dealers

Every Friday in May and June our News10 Meteorologist Monica Woods will broadcast the forecast LIVE from a community event in the StreetCast segment during News10 at 5 p.m. and 6 p.m.

Voting begins Monday morning and ends Thursday at 5 p.m. 

The winner is announced in Thursday's 5 p.m.

VOTE for your Weather StreetCasts Presented by Hyundai Event of the Week

VOTE for your Weather StreetCasts Presented by Hyundai Event of the Week

Every Friday in May and June News10 Meteorologist Monica Woods will broadcast her forecast LIVE from a community event in her StreetCast segment during News10 at 5 p.m. and 6 p.m.

Voting begins Monday morning and ends Thursday at 5 p.m.

Monica will then announce in Thursday's 6 p.m.

Saffir-Simpson Hurricane Wind Scale is undergoing changes this year

SACRAMENTO, CA    The long standing way to categorize hurricane strength is undergoing changes.

Scientists at the National Hurricane Center (NHC) analyzed how wind speeds were converted among the various units, such as knots to miles per hour. They realized there were some gray areas where conversions weren't as specific as they needed. This prompted them to develop a revised scale that better assess wind speeds for advisory products.

The changes will affect the Category 4 storms wind speed range, which will now be 130-156 m.p.h. Previously, the range was 131-155 m.p.h. winds. the NHC says historical records will not be altered based on this change.

Hurricanes start as tropical storms. Once wind speeds reach 74 m.p.h., the storms are classified as hurricanes. The Saffir-Simpson Hurricane Wind Scale ranges from Category 1 with winds 74-95 m.p.h. to Category 5 with winds 157 m.p.h. or higher.

Federal agencies set aside this week for tsunami preparedness

SACRAMENTO, CA    Tsunamis are long high sea waves caused by an earthquake or other disturbance. Every coastline in the United States can be impacted by tsunamis, but some areas are at higher risk than others.

Just off the West Coast of the United States, lies the Cascadia subduction fault. This is almost identical to the fault that ruptured in Japan causing a deadly 9.0 earthquake and  tsunami. The Cascadia fault last ruptured in 1700 but is still capable of unleashing a tsunami as devastating as the one in Japan.

This week is Tsunami Preparedness Week. Federal agencies are coming together to educate the public on tsunami warnings and the threat to coastlines across the United States.

For more information go to: http://nthmp.tsunami.gov/taw/tsunami-awareness-week.html

Submit your weather quiz question for News10

SACRAMENTO, CA    We're answering your weather questions on News10 at 5:00 p.m. If you have a question you would like answered, send it to the News10 Weather Team.

weather@news10.net

You might just see your question on the air!

Today's quiz was submitted by Calaveras High School student, Cally Gustafson. She asked how fast raindrops fall? The answer is 5-20 m.p.h. It depends on the weight and size of the drops. Bigger drops fall faster. Thanks Cally!