Air Quality and Pollution
The valleys of the Wasatch Front of northern Utah experience their greatest concentrations of nitrogen oxides, carbon monoxide and particulates from November through February. Ozone reaches …
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Local knowledge. Wider perspective.
Utah, through
weather.
A place to understand our skies, explore our past, and make sense of a changing climate.
Explore our climate →Southern Utah, storm to sun AI-generated illustration
WEATHER & WATER
Your corner of Utah.
Local forecasts and trusted sources for the conditions that matter.
Find your forecast →THE WEATHER ALMANACSINCE 1847
Every day has a story.
Explore the events and observations in Utah’s historical weather collection.
Travel through weather history →A DAY TO REMEMBERSEPT 18, 2026
A tornado in
the Wasatch.
Farmington & Fruit Heights: the NWS report, eyewitness videos, and the story so far.
Explore the event →FOLLOW YOUR CURIOSITY
September19ON THIS DAY
FROM THE UTAH WEATHER ALMANAC
There’s history in the forecast.
In 1999, two tornadoes touched down south of Park Valley. They were on the ground for 3 minutes and were part of a line of severe thunderstorms. It was the first time that 2 or more tornadoes were photographed on the ground at the same time in Utah.
Read this day in weather history →Historical accounts and separately credited additions.
A PLACE TO START
The science behind our skies.
Allergies
Pollen Forecast for your area (via The Weather Channel) Pollen Count (via the Intermountain Allergy and Asthma Clinic)
Explore the articleAnnual Normal Precipitation
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PHOTO OF THE DAY · September 19
A foot of snow in Cedar City
A foot of snow fell on Cedar City, Utah, on March 9-10, 2006. Photograph by Adam Rue; courtesy ABC4-KTVX Television
Adam Rue
Explore the photo collection →From the historical collection; the feature date is not the date the photograph was taken.FIND YOUR WAY INTO THE COLLECTION
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BUILT ON SHARED KNOWLEDGE
A changing climate. A growing conversation.
Our understanding grows through observation, evidence, and the people who ask good questions. UCCW brings local expertise together for everyone.
Built on local knowledge. Open to discovery.
A shared resource for students, educators, scientists, and everyone curious about Utah.
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