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Dewpoint vs. Humidity

Posted May 5th - 5:22pm

While we were living in Maine the weather forecasters would always talk about the dew point. It is seldom mentioned here in Utah. I have often wondered what the difference is between dew point and the humidity %.


Ross O.

Official Highs

Posted May 5th - 5:13pm

When it was reported that the temperature was 89 on Sunday, in Salt Lake, is that considered the ‘official' high for the state, even though other places, such as St. George, or even South Salt Lake, have higher temperatures? Do all the weather men on the television stations report the high in Salt Lake as being the ‘official' high for the state?

Marsha T.


Air Pressure and Storms

Posted Apr 28th - 6:08pm

I don't understand how air pressure tells us a storm is coming. Can you explain that process to me. Thanks, Jean **********************************************************

It's not as hard as one would think really! Generally, areas of low pressure bring stormy weather. The whole deal with low pressure is the air is rising, when air rises it cools and condenses and makes clouds and rain. So when low pressure is coming, clouds or sometimes inclement weather is on the way.

All you need to know then, or one of the things you need to know, is how do you know when the pressure is lowering? You must have access to a barometer and you can get that data for free online or use one in your house. If you're really ambitious you can make a home made one with some baloons and a jar. Or if your joints bother you when the pressure lowers, you can use your own body as a barometer!

Cold Temperatures and Elevation

Posted Apr 28th - 5:31pm

Dear Weather Expert,

I have a question about temperatures in Utah. As a frequent traveler all over the state of Utah, I've noticed the temperatures at Bryce Canyon are often much lower than other places in the immediate vicinity. I know that area is at around 7500 ft of elevation, but so are other towns not far away (Escalante, Boulder, Torrey), and their temperatures are typically 10 deg warmer. Is there some physical or meteorological phenomena present at that location that keeps the temperature low?

Michael M. West Valley City

Wind Direction and Storms

Posted Apr 26th - 3:17pm

On Wednesday, April 18th, the Wasatch Front got hit with a storm that produced snowfall. I watched the winds associated with the storm blow the big flag outside my office steadily from the north. But, when I viewed the Doppler and radar maps on's weather page, the animated maps showed that the storm was clearly moving from the south.

So my question is, how was the wind blowing the flag steadily towards the south but the weather radar showed the storm moving towards the north?


The Sun and Evaporation

Posted Apr 26th - 2:57pm

What does the sun have to do with evaporation?

Derek W.



Posted Apr 26th - 1:07pm

I am working on a school project and trying to find the answer this question: Describe three ways that sleet is unique. I've had no luck finding an answer. Please anwer ASAP. Thank you so much.

Madison H.


Swamp Coolers

Posted Apr 26th - 12:59pm

How late in the year do we have days where it is so hot that swamp coolers don't work? A couple years ago we had a record number of days above 100 and alot where swamps didn't work-were those all in July-Or did they spill over into August- and how late in August??


Would a swamp cooler inside a large green house work even less in hot weather because the humdity inside is higher -or would it still follow the dew point outside?

Funnel Cloud in SLC?

Posted Apr 26th - 12:09pm

Yesterday (April 23rd approx. 6:15pm) I was on my way home, westbound on I-80 and I am positive that I say a funnel cloud/tornado coming out of the clouds and then within about 5 minutes it slowing went away back into the clouds. What was this, was it a possible tornado. Did anyone get a picture of it?

Thanks! MJ


Is it Fog or a Cloud?

Posted Apr 14th - 2:57pm

I work at snowbird (8000' above sea) as a night time resort shuttle driver. When the visibility is low with out snow, my passengers always make a remark and say, "it sure is foggy". I live in Sandy and I know it's blue skies down there. I call this low visibility style moisture in the mountains, clouds. My question is.... when clouds reach the snowbird and Alta village, do you call it fog or clouds? My only explanation to people is, when you are down in the SLC Valley, you don't point up at the mountains covered in clouds and say, "look at the fog up in the mountains". The only time I can remember about fog in the mountains is in the Sierra Nevada mountains on I-80 well above Reno and closer to Truckee. There is a area there that has signs and warns for toole fog and I have often seen it. I don't think I've ever seen toole fog in Little Cottonwood Canyon. Am I on the right track of opinion? If so, why can some mountains have fog and others can't? Some of my friends say, "when clouds reach the ground, it's fog". I think this is a false statement. Please clear this all up.

Thanks, Brett


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