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Chilly? Blame Omega Block weather pattern

Published: Tuesday, May 03, 2016 @ 12:47 PM
Updated: Tuesday, May 03, 2016 @ 12:47 PM

April was quite a roller coaster as far as temperatures were concerned, with cooler air returning as we wrapped up the month.

However, there were enough warmer days during mid-April to keep the overall temperature average for the month just about half a degree below normal.

Cooler than average temperatures have returned and will likely stick around the rest of this week. Average highs for this time of year are in the upper 60s.

An “Omega Block” in the jet-stream pattern will keep the pattern cool from the Ohio Valley into New England. The pattern is called an Omega Block because the upper-level weather features and jet stream look like the Greek letter Omega.

The pattern can get locked for several days – blocking weather systems from the west from moving eastward. Temperatures are usually cooler than average on the east side of the block, which is where the Ohio Valley will reside for most of this week. This will keep high temperatures in the lower to middle 60s through at least Thursday.

The weather pattern is expected to finally shift into a warmer pattern this weekend as the block slowly shifts east, allowing winds to become more southerly as opposed to northerly. This will allow warmer air that is building in the southern U.S. to shift northeastward into the Midwest and Great Lakes. When that happens, temperatures will rise back in the 70s and perhaps near 80 degrees, with the threat for any frost finally coming to an end.

As far as precipitation is concerned, despite occasional bouts of showers and storms, overall precipitation amounts will likely stay below normal.

For the month of April, the Dayton International Airport, the official measurement location, received 2.95 inches of rain; the average for this time of year is 4.09 inches — which put us more than an inch below normal.

However, the wet winter has our annual precipitation running above average by about three-quarters of an inch.

Eric Elwell is WHIO StormCenter 7 Chief Meteorologist. Contact him at or follow him on Facebook and Twitter.

WPAFB Wednesday Weather: Chilly morning, snow showers to develop in the evening

Published: Wednesday, December 13, 2017 @ 12:25 AM

WRIGHT PATTERSON AIR FORCE BASE—A frigid start to the day is expected with wind chills hovering near 10 degrees through the morning, said Storm Center 7 Chief Meteorologist Eric Elwell.

RELATED: WHIO Weather App-Winter

Clouds will thicken with a few snow showers around by mid to late morning. Little if any snow accumulation is expected through late afternoon.

RELATED: Dayton Interactive Radar - WHIO Doppler 7

Quiet but chilly weather is expected during the afternoon with a few more snow showers around during the evening. Any snow accumulation will be less than 1/2".

Temperatures will climb into the lower to middle 30s this afternoon. Colder air will come back into the Miami Valley for Thursday with highs holding in the middle 20s

STAY INFORMED: School-Business Closings, Delays

Published: Thursday, December 08, 2016 @ 3:03 PM
Updated: Tuesday, December 12, 2017 @ 6:06 AM

Stay informed with the latest school delays and closings, business closings and snow emergencies.

You can access them 5 different ways: 

For information on how to enroll your school or business in the free School Watch Program, click here.

Know your forecast for your county

Published: Wednesday, December 07, 2016 @ 5:00 PM
Updated: Tuesday, December 12, 2017 @ 5:17 AM

Winter weather in the Miami Valley varies drastically from county to county--from north to south, or west to east--depending on the direction in which a storm system approaches. Each weather event brings a multitude of variables. Knowing whether your county will see rain, snow or a mix in-between could drastically affect how you plan your day.

That's why the StormCenter7 team of meteorologists tracks storms in each county and compiles a forecast for each county, twice per day, so you are prepared with the most accurate weather information.


Home page of the WHIO Weather App highlighting the County by County forecasts.
WHIO news app county by county forecast

Snow, strong winds to make for hazardous travel Tuesday

Published: Monday, December 11, 2017 @ 3:48 AM
Updated: Monday, December 11, 2017 @ 11:52 PM

Light accumulations, windy and cold conditions expected.


  • Increasing clouds, snow showers develop late tonight
  • Snow squalls, strong winds Tuesday
  • Falling temperatures, bitter wind chills into midweek

>> WHIO Doppler 7 HD Interactive Radar


This evening: Increasing clouds and chilly. temperatures hovering in the 30s.

Tonight: Snow showers developing late with gusty winds developing. Snow accumulation by morning up to a half-inch. Temperatures dropping into the upper 20s.

>> County-by-County Weather 

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

Tuesday: Snow showers and squalls likely, especially early in the day. Expect rapidly changing visibility with near white-out conditions possible where snow squalls occur. Total snow accumulations of around an inch are expected with higher amounts, up to 3 inches possible where snow squalls occur.


Higher accumulations will generally be across the northwestern Miami Valley. It will be windy and cold with temperatures falling through the 20s. Wind chills will fall into the single digits by evening as snow tapers.

RELATED: Snow squalls could cause white-out conditions Tuesday

>> Winter weather traffic information

>> What are the chances for a White Christmas?

Wednesday: Expect a mix of sun and clouds during the day with increasing clouds late. Scattered snow showers will develop in the afternoon and continue into the evening. Some accumulation is possible, which could create hazardous travel for the evening commute. Highs will only reach into the middle 20s with wind chills in the teens.

(Storm Center 7 Meteorologist Kirstie Zontini)

Thursday: Expect lingering clouds and chilly temperatures. Highs will be near 30 degrees.

Friday: Expect a mix of sun and clouds. A few flurries or snow showers will be possible. Highs will be near 30 degrees.

Saturday: Temperatures will moderate with a bit more sunshine expected to start the weekend. Highs will rebound to near 40 degrees. 

>> Winter Weather Awareness: How does salt help melt ice on roads?

>> YOU NEED THIS: WHIO Weather App