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Significant winter storm possible Friday into Saturday

Published: Tuesday, January 09, 2018 @ 4:09 PM
Updated: Wednesday, January 10, 2018 @ 8:40 AM

A look at the possible road impacts and position of this system.

UPDATE @ 8:40 a.m. (Jan. 10):

Our Storm Center 7 meteorologists are closely monitoring a potential winter storm that could impact the Miami Valley as we end the week.

Winter Driving Tips

The travel forecast for Thursday through Saturday is a mixed bag of precipitation, Storm Center 7 Meteorologist Kirstie Zontini said Wednesday.

>>Track the latest conditions with live WHIO Doppler 7 Radar

The evening commute is expected to feature wet roads as rain showers move in through the overnight. 

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“As cold air cuts in with this system on Friday, road conditions will deteriorate quickly,” Zontini said. “There is still the potential, especially in the Dayton-area, to see a wintry mix before the whole region transitions to snow for Friday evening.”

RELATED: Winter Weather Awareness: What to have in your car kit

“The snow should stop accumulating Saturday morning, but with temperatures in the 20s, then single digits Saturday night, even if the Miami Valley doesn't see the most snow from this system, slick roads will likely be a problem,” Zontini said. 


This has the potential to be one of the biggest winter storms to impact our region in a couple of years. However, there are a lot of unknown variables at this point, so a lot could change.

Our Storm Center 7 team is keeping a close eye on the potential for a major winter storm to end the week and start the weekend. There are still a lot of variables that could change, but our meteorologists say this will be something to pay close attention to over the next few days.

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As is typical with these systems, the exact track will be crucial to not only determine how much snow we get and also whether the precipitation falls as snow, sleet, freezing rain or just plain rain. However, much of the long-range model data does show a significant winter storm moving through Ohio beginning midday Friday and lasting into Saturday. 

The two major models we use are the European model and the American, GFS model. The European model shows snowfall amounts in the Dayton-metro area of between 5 to 8 inches with the GFS model tops out between 8 to 11 inches of snow.

Winter Driving Tips

Higher amounts could fall north of the main track. We will have to monitor this storm very closely as we have seen quite a bit of variability in each model run, we just don’t exactly know how much snow will fall or if rain winds up being the primary precipitation we receive. 

It is also important to note that most of the models show gusty winds with this system, which could lead to blowing and drifting of the snow, regardless of the amounts. Temperatures will also be dropping through the day Friday with highs back into the teens this weekend.

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We want to let people know that now is the time to be sure you are prepared for a significant storm, even if it turns away from us. We certainly do not want to add hype, however, it is better to be ready instead of having to rush to prepare if the warnings get issues. 

Our meteorologists should know a lot more about the track of this major storm by late Wednesday or early Thursday.

Be the first to get the latest weather forecasts and updates when you download the WHIO Weather App.

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Showers, storms push through this evening

Published: Saturday, May 26, 2018 @ 6:55 AM
Updated: Saturday, May 26, 2018 @ 4:40 PM

A few storms are expected in the Dayton area this evening, with more dry time Sunday & Monday.

Showers and a few storms will push through this evening, Storm Center 7 Meteorologist Brett Collar said. An isolated shower or storm can’t be ruled out through midnight.

>>WHIO Weather App


    • Few showers, storms move through this evening
    • Isolated shower or storms Sunday/Monday
    • Mainly dry and hot for Memorial Day 

    >> WHIO Live Doppler 7 Interactive Radar

    >> UV Index: How to protect your skin

    Overnight: Dry conditions are expected as temperatures drop into the middle to upper 60s. Fog will be likely early Sunday.

    >> How to spot Jupiter through the weekend

    Sunday: A dry start is expected to the day, which will be hot with highs in the upper 80s. With the daytime heat, there may be an isolated shower or storm, but it looks like most will stay dry. Don’t cancel your outdoor plans, but have a backup plan indoors.

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

    Memorial Day: Lots of sunshine, hot and humid again for Monday. Highs will top out near 90 degrees with a heat index from 90 to 95 degrees. Once again, an isolated shower or storm can’t be ruled out.

    Tuesday: Another hot day is expected with highs near 90 degrees under mostly sunny skies.

    Wednesday: The chance for rain, maybe storms, returns with highs in the middle 80s. Rain comes from the remnants of Alberto, the first named tropical storm of the Atlantic season.

    >>County-by-county weather 

    Thursday: The remnants of Alberto will give us more rain. Highs will be in the middle 80s.

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    Subtropical Storm Alberto: Gov. Rick Scott declares state of emergency in Florida

    Published: Saturday, May 26, 2018 @ 12:53 PM

    2018 Hurricane Names

    Governor Rick Scott issued Executive Order 18-150 on Saturday, declaring a state of emergency in all 67 Florida counties as the state continues to monitor and prepare for Subtropical Storm Alberto.

    DOWNLOAD: WFTV Weather app

    >> Read more trending news 

    By declaring this state of emergency, Scott's office said he is ensuring that state and local government has ample time, resources and flexibility to get prepared for this storm, WFTV reported.

    What is a subtropical storm?

    Scott said, “As we continue to monitor Subtropical Storm Alberto’s northward path toward Florida, it is critically important that all Florida counties have every available resource to keep families safe and prepare for the torrential rain and severe flooding this storm will bring. Today, I have declared a state of emergency in all 67 Florida counties to make sure that our state and local governments are able to coordinate with federal partners to get the resources they need. Yesterday, I directed the State Emergency Operations Center activate to Level 2 and I will continue to be in constant communication with state and local emergency management officials as this storm approaches Florida.

    TALKING THE TROPICS WITH MIKE: Alberto forms near Yucatan Peninsula - stays west of Jacksonville - heavy rain for local area 

    “If any Florida family doesn’t have an emergency preparedness plan, now is the time to act. Remember, the track of these storms can change without notice. Do not think that only areas in the cone will be impacted – everyone in our state must be prepared. I encourage every Floridian to visit and get your plan before this storm hits so you can keep your family safe. We will continue to provide updates to Florida’s residents and visitors and do everything to prepare for and respond to this storm.”

    READ: Alberto to drench Memorial Day weekend plans

    FOLLOW: Live WFTV weather radar

    • The State Assistance Information Line (SAIL) contact number is 1-800-342-3557. 
    • Follow @FLSert or @FLGovScott on Twitter for live updates.
    • Visit to find information on shelters, road closures, and evacuation routes. 

    Click here for local and nationwide hurricane news, tracking maps, photos, video, satellite, radar, alerts, blogs and storm preparation guide.


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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. 

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

    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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    WHIO Weather App: Check Live Doppler 7 LOCAL radar, stormy forecast Memorial Day Weekend

    Published: Friday, November 18, 2016 @ 2:01 PM
    Updated: Tuesday, March 13, 2018 @ 10:59 AM

    Weather app
    Weather app

    The free WHIO Weather App will keep you alert and informed of changing weather conditions, no matter where you are, at home or traveling on the road.  You’ll be able to access a live radar anytime, anywhere. You’ll also receive weather watches and warnings no matter where you are.

    Install the WHIO Weather App free now from the Google Play or Apple store. Right at your fingertips, you'll have access to:

    • Live radar to track rain, lightning and storms
    • School closings 
    • Hour-by-hour forecasts 
    • Hyper-local forecasts for your county 
    • Forecasts wherever you travel in the U.S. 


    Once you have downloaded the app, it is time to setup the locations you would like to monitor. Remember, these can change whenever you'd like with a push of a button. 

    • Once in the WHIO Weather app, look for the 'plus sign' at the top left of your screen  
    • Click Current Location to save your first city 

    After that, you can save up to 10 locations by typing in the city and state. These locations can be anywhere you wish to receive weather updates. 


    A new feature in the app is its ability to track storms even when the app isn't open and update you wherever you go...even out of state. If you travel into a location that is being impacted by weather, you will automatically be updated through the app. 

    • Once in the App, click the 'plus sign' at the top left of your screen 
    • Go to the Settings button at the bottom of your locations tab
    • Click Background Tracking, this will take you to your phone's settings
    • Make sure under the 'Location' option you chose 'always'


    The WHIO Weather App is unique because it allows you to choose which the weather alerts for which you want to receive notifications. All watches, warnings and advisories that the National Weather Service issues are available in our app. 

    • Make sure there is a check by the alerts you want to receive
    • You can turn off any notification you don't want by clicking the check mark 


    A special feature on the WHIO Weather App is the ability for the app to notify you ONLY when your GPS or saved locations are in the POLYGON for a warning. The National Weather Service draws polygons when it issues warnings and advisories. If your location isn't in the polygon, the alert will NOT go off. 

    WATCHES on the other hand are issued for entire counties, not polygons. If your location falls in a county where a watch is issued you WILL get an alert. 


    Unlike most apps that rely on a computer to just dump weather data on to their app, the StormCenter 7 Team updates the forecast on the WHIO Weather App each day, multiple times a day. With the WHIO Weather App you are getting a detailed forecast specifically created for the Miami Valley. It's not from a meteorologist many states away.


    WHIO weather app in iPad


    We've added the latest list of school and business closings and delays in the WHIO Weather App so you can check the list from wherever you're located. Simply open the app, along the bottom is a tool bar, 'Closings' is the third option from the left. This will take you directly to the most recently updated list. This new feature will better help you plan your day, allowing you to adjust as needed when your kids' school or your place of business issues a delay or closes due to road conditions or other reasons. 



    If you miss a TV newscast, you can still keep up with the latest video forecasts our meteorologists create throughout the day. These short weather video segments tell the weather story of the day, how it will impact you, and contain their scientific explanations for unique elements of the forecast you won't get in a written story or graphic. This is a great tool during severe weather days and when a big winter storm may impact the Miami Valley. These custom video forecasts created by the StormCenter7 team of Meteorologists can be found under the 'Video' tab. 



    The Interactive Radar is available year-round in the WHIO Weather App. Features on the app allow you to see lightning strikes along with satellite and radar. Under the 'Radar' tab you can click on the 'Layer' icon to overlay things like watches and warnings so you can see where storms and alerts are in relation to your location.

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