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ASK THE METEOROLOGIST

“Why are winds stronger in the afternoon?”

Something that we commonly see is that winds will start out calm or light in the morning hours, and then as the day progresses, the winds will start getting stronger by the afternoon. Right before the sun goes down is when we typically see the winds at their peak. But why?

Well, when thinking about wind speed, it is important to remember friction. Friction is one of the reasons we have varying wind speeds. Obviously, the more friction, the slower the winds. Having this in mind, we see that the winds are slower at the surface than they are in the upper levels of the atmosphere. Faster currents of air move above our heads while we see the lighter winds at the surface. That must mean that the winds at the surface are encountering more friction. What causes the friction at the surface? Terrain, buildings, mountains, towers, etc.  Now that we figured out where the different wind speeds occur, we can understand how they change.

During the day, if we have enough low pressure, daytime heating will cause air to rise. Low pressure promotes rising air and high pressure promotes sinking air. When air rises it cools and condenses to form clouds. When air sinks it warms away from the dewpoint, so no condensation takes place.  That is why when you hear the meteorologists talk about low pressure, it’s usually a cloudy day, and clear when they say high pressure.

When we get low pressure, air begins to rise as pockets and when the winds aloft hit the pocket of air, it is forced in a different direction. The wind can be directed downward to the surface where it mixes with the light winds to cause stronger winds. The later in the day, the more thermals that will be rising; therefore, more of the faster moving winds are deflected to the surface. That is why the strongest of the winds are felt in the late afternoon.

When the sun goes down, thermals stop rising and thus the balance resets itself.

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WEATHER DISCUSSION

Now entering our second day of the high pressure, the ridge is continuing to build. Each day from here, we’ll be warming into the weekend. It seems like Friday/Saturday will be the timing of the axis of the ridge. This is when we typically see the warmest of the afternoon highs. Expect high temperatures to be closer to records during this period than to actual averages. Starting Sunday, the ridge will begin breaking down and shifting off to the east. Hopefully by the end of next week we get more moisture and maybe even some rainfall. Only time will tell.

A FROST ADVISORY and a FREEZE WARNING in effect until about 8:00 Thursday and then will expire. As of now, no advisories have been put in place for tomorrow, however this does not mean we could go without some frost. Cooler spots in the Basin and Northern California will still be getting near freezing. The next few days will be cold to start out and then warm by the afternoons. You’ll need jackets heading to work, then you’ll want to take them off by the drive home.

Once again, this pattern continues for at least into the middle of next week.

Thanks for logging on and have a great day!

Meteorologist Seth Phillips

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College Football Forecast

Arizona Wildcats vs. Oregon Ducks

Autzen Stadium: 7:30 p.m. / Temperature at kickoff: 63 degrees / Winds: N ~ 5 mph

FFForecast: High pressure over Oregon creating clearing skies. Expect it to be a comfortable day for tailgating but getting chilly right around game time. If heading into the game, bring a jacket in as well.

EBOLA PATIENTS(CNN) — Texas Health officials are reaching out to as many as one hundred people who may have come in contact with Texas Ebola patient Thomas Duncan.

Officials are questioning them and will focus on those with a potential risk of infection.

This contradicts an earlier report that 80 people were being monitored for Ebola in the Dallas area.

Officials said – so far – no one has shown symptoms of the deadly virus and most are not being quarantined.

Health officials have ordered four close relatives of Duncan to stay in their Dallas home and not have any visitors until at least Oct. 19th.

EBOLA PATIENTSPORTLAND, Ore.  (ABC) — The Portland International Airport is making a plan to handle the potential Ebola crisis.

Isolation bags are being used as a front line of defense when it comes to stopping someone who shows up in the airport with the virus.

Airport officials said the bags control a person’s bodily fluids, preventing them from spreading.

They also said if anyone has to go in, they basically become a bubble boy.

“They’re unable to walk, it’s a fully encapsulated bag that goes around the patient,” said Lt. Michael Dayton of the Portland Fire Department. “It’s going to be on the gurney and they’ll be sealed up, we’ll provide oxygen to them, they’ll be able to breath and talk and stuff.

Officials said the bag would only be used if someone is showing symptoms on a plane, which wasn’t the case for the patient currently being treated in Dallas.

Police Arrest Douglas County SuspectKLAMATH FALLS, Ore. — A structure fire on Wednesday night led to an arrest in Klamath Falls.

Officers from the Klamath Falls Police Department, and personnel from Klamath County Fire District 1, responded to 2401 Eberlein Ave. The residence and a vehicle were fully engulfed in flames. Both of the people living there were evacuated and transported to Sky Lakes Medical Center.

Police determined the fire to be suspicious. One of the people living in the residence, Shawn Douglas Sawyer, 18, was developed as a suspect and he was arrested for Arson.

Sawyer is lodged in the Klamath County Jail. Police suspect that further charges are likely. The investigation is ongoing.

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ASK THE METEOROLOGIST

“What causes the Northern Lights?”

Walker, Mae Richardson Elementary

The sun is the basic cause of the Aurora.  They occur at each of the Earth’s poles, and the one that we are talking about involves the North Pole, called the Aurora Borealis.  The South Pole aurora is known as the Aurora Australis.

The surface of the sun is constantly boiling and changing because it is so hot, so we see things like sunspots and solar flares, which release particles out into space.  The sun also creates what’s called a “solar wind,” which helps transport the particles discharged from the sun.  Because of the magnetic charge of the Earth’s poles, they attract the particles.  As they enter the Earth’s magnetic field, the particles interact with the molecules of oxygen and nitrogen, which then causes the show in the sky.

Whether the particles from solar flares interact with oxygen or nitrogen molecules affect the color of the aurora.  Collisions with oxygen molecules create green and yellow lights across the sky, while nitrogen creates red or violet.  The altitude can also determine what color the aurora glows, that is, whether it’s more red or green.

  The best time to see the Aurora Borealis is during the winter months when there are cold, clear nights and low pollution.  The best place? Alaska or northern Canada, but sometimes enhanced solar activity allows the lights to be visible from lower latitudes.  Also, in the southern hemisphere, the Aurora Australis is best visible in Antarctica.

Chief Meteorologist Kate McKenna

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WEATHER DISCUSSION

One more morning of cold temperatures awaits, then highs will be climbing as we head into the weekend.  Wednesday morning, we saw lows as cold as the middle to upper 20′s east of the Cascades, and while it won’t be that cold Thursday morning, temperatures will be low enough for another frost or freeze.

Another frost advisory and freeze warning goes into effect Thursday morning for the same locations that saw them Wednesday morning – the Klamath Basin and parts of northern California.  The time period is also the same: 1 AM until 8 AM Thursday.  Fortunately, by the afternoon hours, the morning’s chilly temperatures will seem like a distant memory.  Highs will not only be warmer than Wednesday, but about five degrees above average.

We’ve been talking about the high pressure ridge building in behind the cold front earlier this week, which is now starting to take place.  The ridge builds and holds strong through the weekend, leaving skies clear and temperatures warm.  For the immediate future, as in the next seven days, skies will be sunny and temperatures will stay above average.

For more information, or to send me your weather pictures, head over to Facebook or Twitter.

Chief Meteorologist Kate McKenna

8-20-uo-sign-250x250EUGENE, Ore. — After more than two years of planning the flags of all nine of Oregon’s tribal nations will fly above the Erb Memorial Union.

The University of Oregon will hold an installation ceremony at 10 a.m. on Thursday to dedicate the new flag poles.

“We are extremely grateful to the nine tribes who helped us accomplish this amazing feat,” said Interim President Scott Coltrane. “These flags will fly proudly at the center of our campus and will be a constant reminder of their sacrifices and resiliency.”

The project’s began in 2012 when then business student Orion Falvey went looking for a class project that would enhance campus culture and leave a legacy. After help from classmates he approached Gordon Bettles, the steward of the UO’s Many Nations Longhouse and a member of the Klamath Tribes, who suggested the flag installation.

The installation is the only one of its kind in the Pac 12 to fly all of the sovereign tribes in its state.

Portland Christmas Tree Bomb PlotPORTLAND, Ore.– The young man convicted of plotting to bomb a Portland Christmas Tree lighting ceremony, will spend 30 years in prison.

Twenty-Three year old Mohamed Mohamud was arrested in 2010 after he attempted to detonate what he believed to be an explosives-laden van that was parked near the tree lighting ceremony in Portland.

The arrest was the culmination of a long-term undercover operation, during which Mohamud was monitored closely for months as his bomb plot developed. The device was in fact inert, and the public was never in danger from the device.

Mohamud will have a lifetime term of supervised release after his 30 year sentence.

 

Nova-LealKLAMATH FALLS, Ore.– A man was sentenced for his involvement in one of the largest drug busts during a traffic stop in Southern Oregon. Klamath District Attorney, Rob Patridge said Jeronimo Novoa-Leal will spend five years in prison and likely be deported back to Mexico afterward.

Oregon State Police said he was a passenger in a car traveling down Highway 97 nearly a year ago. They said they pulled the car over and found 22 pounds of methamphetamine, $5,000 in cash, and a fake social security card. The street value of the drugs is estimated to be around 1.1 million dollars.

Rob Patridge said, “The Oregon State Police are an integral part of the thin blue that help keep our communities safe. As funding has become tight and the number of troopers throughout the state have fallen by almost half we are lucky we still have troopers like those involved in this case out on our roads. Their diligent and insightful work helped keep these drugs off the streets which prevents the spawning of more theft and violent crime. As budgets have become even tighter we are lucky to have the dedicated professionals at the Oregon State Police to protect rural Oregon. The Oregon State Police have clearly sent the message that Oregon is not open to drug traffickers. “

The driver of the vehicle stopped is scheduled to be sentenced on Thursday, October 23, 2014 at 3:00 p.m.

 

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