Wind chills explained: How they are calculated, advisories, and tips to stay safe

Published: Thursday, January 04, 2018 @ 10:40 AM
Updated: Thursday, January 04, 2018 @ 10:40 AM

A look at the criteria used by the NWS for Wind Chill Warning, Advisory and Watch.

We often talk about wind chills this time of year because it’s an indication of what the temperature feels like.

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Wind chill values are based on the rate of heat loss from exposed skin.

As the wind increases, it pulls heat away from the body, cooling down the skin and eventually the internal body temperature. This is why we say it "feels" colder outside than the air temperature actually is sometimes in the winter, said Storm Center 7 Meteorologist Kirstie Zontini.

Examples of how wind chill is calculated during the winter months.

Air temperatures this week will fall to the low single digits some mornings; rising to only 18 to 20 degrees. 

Cold air, combined with even the slightest of breezes, will allow wind chill values to fall below zero this week.

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The calculation the National Weather Service uses for wind chill looks at how cold it is as well as windy.

To help protect people from frostbite and hypothermia, the National Weather Service will issue a Wind Chill Advisory if the wind chill is expected to drop anywhere from minus 10 to minus 24 with wind around 10 mph or greater.

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When the wind chill is minus 10 to minus 15, frostbite can develop in less than 30 minutes.  

WIND CHILL WARNINGS AND ADVISORIES

The National Weather Service issues Wind Chill Warnings and Advisories based on specific criteria, depending on geographical location.

“A Wind Chill Advisory is issued when wind chill values will be between 10 below zero and 24 below zero and winds 6 mph or greater,” Zontini said. “A step up from an advisory or a Wind Chill Warning, issued when the wind chill will be 25 below zero with winds 6 mph or greater.” 

A Wind Chill Watch can also be issued if wind chills low enough for a warning are expected in the next 12 to 36 hours, according to Zontini 

HOW TO STAY SAFE

Dress for the weather this time of year. Dress in many layers that are lightweight but warm. Your coat can be heavier and should have a hood. Water resistant materials are best as well. 

>> 5-Day Weather Forecast

If you must go outside, be sure to cover as much skin as possible to help prevent both frostbite and hypothermia. 

Keep on a hat as well because a lot of body heat is lost through your head. Also, wear mittens instead of gloves to keep your hands warmer.

Got a tip? Call our monitored 24-hour line, 937-259-2237, or send it to newsdesk@cmgohio.com.

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Unsettled weather for out-of-town guests this weekend

Published: Friday, May 18, 2018 @ 6:53 AM
Updated: Saturday, May 19, 2018 @ 4:40 PM

More showers and storms are likely through the weekend in the Dayton area.

Welcome to the Miami Valley! We’ve been stuck in an active weather pattern for about a week and that will continue this weekend as well.

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If you are visiting or just making plans this weekend, here’s what you need to know. 

1. It will be warm! Saturday highs will be around 80 degrees and Sunday we climb to the lower 80s. Dew points also will climb, which means it will feel a little humid this weekend as well. 

2. There will be storms to track. This weekend won’t be completely dry, but there is a lot of dry time to enjoy! Saturday pop-up storms will be possible at any time but especially in the afternoon. The storms will be isolated in nature, so keep your eye to the sky because it might be sunny in one spot and stormy in another. Sunday most of the morning and afternoon looks dry. Some storms will develop again towards the evening hours. 

3. Do you have allergies? The Miami Valley is known for being a struggle for allergy sufferers and this weekend there might not be much relief. We have noticed the tree pollen count has been dropping. This is a natural progression as we move through the middle of May. Grass pollen, though, is now picking up. The rain we see will help a little to keep the tree and grass pollen down. Watch the mold spores though, they can climb during a muggy and mild stretch.

5 Day Forecast with Meteorologist Brett Collar

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WPAFB Friday Weather: Showers, storms to continue into early next week

Published: Thursday, May 17, 2018 @ 11:44 PM

WRIGHT PATTERSON AIR FORCE BASE—Occasional showers with the possibility of a rumble of thunder for the day. Though severe weather is not expected, mostly cloudy skies will be. Highs hold in the lower 70s.

RELATED: 5-Day Forecast

Showers, storms to continue through the weekend with a passing shower possible on Saturday and scattered showers with one or two stronger storms likely Sunday evening. Monday brings a chance for showers and storms as well. 

RELATED: County-by-County Weather 

Temperatures peak in near 80 degrees. 

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Increasing threat for showers through Friday

Published: Thursday, May 17, 2018 @ 3:21 AM
Updated: Thursday, May 17, 2018 @ 11:25 PM

Chance for passing showers and storms return today, especially south of I-70.

Patchy light rain and drizzle will taper off; some patchy fog is possible overnight, Storm Center 7 Chief Meteorologist Eric Elwell said. Temperatures fall into the lower 60s.

QUICK-LOOK FORECAST

  • Showers redevelop Friday
  • A bit cooler Friday
  • On and off storms into the weekend 

>> LIVE Doppler 7 Interactive Radar

DETAILED FORECAST

Friday: Expect mostly cloudy skies with occasional showers. A rumble of thunder is possible but severe weather is not expected. Highs will hold in the lower 70s.

>> Pollen very high this week 

Saturday: Expect a mix of sun and clouds and a chance for passing showers and storms. Highs will rebound to near 80 degrees.

Sunday: The day will start mainly dry under partly cloudy skies. Clouds will increase late in the day with scattered showers and storms becoming likely by evening. One or two stronger storms will be possible. Highs will climb into the middle 80s.

>> 5-Day Forecast

Monday: Expect a chance for showers and storms with highs in the lower 80s.

Tuesday: Partly sunny skies are expected with only a slight chance for a lingering shower. Highs will top out near 80 degrees.

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WPAFB Thursday Weather: Chance showers continue for rest of week

Published: Thursday, May 17, 2018 @ 12:01 AM

WRIGHT PATTERSON AIR FORCE BASE—There’s a chance for a few showers, mainly south. Overall, expect a mix of sun and clouds for the day. Highs peak in the upper 70s.

RELATED: 5-Day Forecast

Passing showers and storms continue for Thursday, particularly in the afternoon. Temperatures hold in the lower 70s. 

Threat for showers continues through the weekend into early next week. 

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