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Warming trend continues; lower temps arrive next week

Published: Tuesday, October 17, 2017 @ 7:32 PM

A slow warm-up is getting underway across the Miami Valley which will bring temperatures back up nearly 10 degrees above normal by this weekend. But a surge of very chilly air is brewing up in Canada, and may be getting set to head south. Chief meteorologist Eric Elwell explains when this big change will likely occur.

A slow warming trend is underway with above-average temperatures expected Wednesday.

Temperatures of 70 degrees will return through the weekend as a massive area of high pressure slowly pushes across the eastern half off the country, Storm Center 7 Chief Meteorologist Eric Elwell said.

However, a major pattern shift is underway in northwestern Canada, where colder air is building. 

This colder air is forecast by most of the long-range models to begin heading southward into the northern U.S. later this weekend.

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The chilliest air of the season could cross the Miami Valley by the middle of next week with current models predicting our first frost by late next week.

Temperatures may not climb out of the lower 50s next week, with some models suggesting snow near the Great Lakes by Wednesday night.

Although it’s too early to know whether the precipitation will materialize, Elwell said to enjoy the upcoming weekend warmth while it lasts Because big changes could come next week.

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Florida's 10 safest cities in a hurricane

Published: Tuesday, May 15, 2018 @ 4:54 PM
Updated: Tuesday, May 15, 2018 @ 4:54 PM

Get Ahead of the Storm - 5 Severe Weather Hacks

There’s really no place that’s 100 percent safe in Florida when it comes to hurricanes.

Even Orlando got hit twice in 2004 by hurricanes Charley and Frances.

>> Read more trending news

And, although Florida enjoyed a more than 10-year hurricane drought after 2005’s Hurricane Wilma, Hurricane Hermine made landfall in the Florida Panhandle in 2016. 

Still, Homeinsurance.com has ranked Florida’s cities based on their evaluation of NOAA-identified storms from 1965 to October 2014, doling out scores based on the number of storm events, number of storm-related deaths, property damage and storm-related injuries.

The top 10 safest cities in Florida during a hurricane, according to the insurance study, are:

  1. Leesburg
  2. Orlando
  3. Sanford
  4. Kissimmee
  5. Palatka
  6. Lake City
  7. Naples
  8. Ocala
  9. Gainesville
  10. Fernandina Beach


The entire ranking is below.

Read more about the Home Insurance study here.

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Heat Index: What is it? Why does it matter?

Published: Thursday, May 24, 2018 @ 6:35 AM

Meteorologist Kirstie Zontini looks into what the heat index is and why it is important.

 In the winter we talk about wind chill and in the spring and summer, it is the heat index that is important, according to Storm Center 7 Meteorologist Kirstie Zontini.

RELATED: What is UV Index and how to protect your skin

Both are apparent or "feels like" temperatures. The heat index is a "feels like" temperature that looks at the actual air temperature and how much moisture is in the air, either with relative humidity or dew point. When it is hot, it can be uncomfortable. When it is hot and muggy, it is a different level for our bodies. 

The amount of moisture in the air impacts how well our bodies can cool off. When you are hot, your body starts to sweat, that sweat is then evaporated from your body into the atmosphere. If the moisture content of the air is high, it is harder for that evaporation to take place, and harder then for your body to cool down. 

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Here is the actual equation for calculating heat index: 

 

HI = -42.379 + 2.04901523*T + 10.14333127*RH - .22475541*T*RH - .00683783*T*T - .05481717*RH*RH + .00122874*T*T*RH + .00085282*T*RH*RH - .00000199*T*T*RH*RH

 

As the air temperature and relative humidity increase, the heat index will as well. If it is 88 degrees with a relative humidity of 55%, the heat index would be 93 degrees. If it was 100 degrees with a relative humidity of 55%, the heat index would reach 124 degrees. This makes being outside when it is hot and humid more dangerous. 

  • 80-90° - Use caution. Prolonged activity outside or exposure could be dangerous. 
  • 90-103°- Use extreme caution. Lengthy exposure can cause heat cramps, heat stroke or heat exhaustion
  • 103-124°- Danger! Heat cramps and heat exhaustion likely. Prolonged exposure can lead to heat stroke. 
 

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WPAFB Thursday Weather: Sunshine, low humidity continue 

Published: Thursday, May 24, 2018 @ 12:02 AM

WRIGHT PATTERSON AIR FORCE BASE—Humidity levels remain low for the day as plenty of sunshine is expected. Temperatures reach back into the lower 80s.

RELATED: 5-Day Forecast

Friday’s forecast continues the calm weather and warm temperatures in the mid-80s.

Heat and humidity begin to build for the weekend with the chance for pop-up thunderstorms Saturday and Sunday.

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Clear skies overnight; threat for Memorial Day weekend storms

Published: Wednesday, May 23, 2018 @ 3:30 AM
Updated: Wednesday, May 23, 2018 @ 5:10 PM

Plenty of sunshine with low humidity this afternoon.

Skies will be clear with comfortable conditions as temperatures drop into the middle 50s, Storm Center 7 Chief Meteorologist Eric Elwell said.

QUICK-LOOK FORECAST

  • Quiet and comfortable overnight
  • Air Quality Advisory Thursday for Butler, Warren counties
  • Memorial Day weekend: Heat, humidity, threat for pop-up storms

>> WHIO Live Doppler 7 HD Interactive Radar

DETAILED FORECAST

>> Air Pollution Advisory Thursday for Butler, Warren counties

Thursday: Lots of sunshine is expected with temperatures rebounding back into the lower 80s. Humidity levels will remain low. An Air Quality Advisory is issued for Thursday for Butler and Warren counties in anticipation of high ozone levels.

An Air Quality Advisory is in place for Thursday in Butler and Warren counties

>> Tropical System may form over Memorial Day Weekend

Friday: Mostly sunny skies are in the forecast but temperatures will heat up into the middle 80s.

>> What is the UV index and how do you protect your skin?

>> County-by-County Weather

Saturday: The heat and humidity will begin to build with partly cloudy skies. There is a chance for some afternoon and evening pop-up thunderstorms. Highs will be in the upper 80s.

>> LISTEN: Cloudy with a chance of Podcast: A podcast for weather fans 

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Sunday: It will be quite warm and humid with partly cloudy skies and a chance for pop-up thunderstorms.

>> 5-Day Forecast

Memorial Day:  Expect it to be partly cloudy and humid Monday with a continued chance of mainly afternoon/evening pop-up storms. Highs will be in the upper 80s.

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