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 eric.elwell@coxinc.com or follow him on Facebook and Twitter.

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WPAFB Friday Weather: Flood watch through Sunday; rain to continue 

Published: Friday, February 23, 2018 @ 12:02 AM

WRIGHT PATTERSON AIR FORCE BASE—A Flood Watch remains in effect through Sunday with waves of rain expected to move through, according to Storm Center 7 Chief Meteorologist Eric Elwell.

RELATED: Rain totals: soggy mid-week, more rain coming

The rain may be heavy at times, especially this morning. Temperatures will be mild despite the rain, rising to near 60 degrees. 

Showers will taper off briefly in the evening before redeveloping late tonight through Saturday. The rain may get heavy again Saturday evening. Rainfall amounts will range from 2 to 4 inches through Saturday night.

RELATED: 5-Day Forecast

The rain will taper off early Sunday with clearing skies and slightly cooler temperatures, generally in the lower 50s to end the weekend.

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 Three things to look forward to this spring

Published: Thursday, February 22, 2018 @ 12:25 PM

It has been a very wet week in the Miami Valley, but it is also a turning point. We are now less than a month from the astronomical start to spring. On March 20 the vernal equinox will take place, transitioning us to the new season. 

Days of rain getting underway

  1. Daylight: The days will get longer. Daylight Saving Time begins March 11, which will help increase the amount of daylight but naturally the days get longer during the transition from the winter solstice to the summer solstice. From Feb. 20 to March 20 we will see an increase of a little more than an hour of daylight.                                      Latest weather video: Watch our five day forecast
  2. Low Snow: The chance for snow drops off. On average, the latest we see an inch of snow in Dayton is March 10. That doesn’t mean we won’t get snow in March, just statistically speaking it becomes less likely. There will be a greater chance though for spring storms as severe weather season kicks in.  
  3. Warmer: It will gradually get warmer. The average afternoon high towards the end of February is around 40 degrees but by the first day of spring it warms up to 51 degrees. The angle of the sun and the length of day helps to increase our average high. 

Keep up with the rain this week by using the WHIO weather App. 

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WPAFB Thursday Weather: Rain showers continue through weekend 

Published: Thursday, February 22, 2018 @ 12:41 AM

WRIGHT PATTERSON AIR FORCE BASE—A soggy morning is expected although rain will move out fairly quickly, according to Storm Center 7 Chief Meteorologist Eric Elwell.

RELATED: 5-Day Forecast

Temperatures will start out the day in the middle 30s and make it back into the middle 40s during the afternoon with lingering clouds. After some brief dry time tonight, rain will return to the area Friday morning with on and off rain likely to continue through Saturday. The rain may be heavy at times with a few thunderstorms possible.

RELATED: County-by-County Weather

Rainfall amounts will range from 2 to 4 inches through Sunday morning. Despite the rain, temperatures will rebound to near 60 degrees for highs both Friday and Saturday before cooling into the lower 50s to end the weekend.

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Warm temperatures lead to record-breaking week

Published: Wednesday, February 21, 2018 @ 3:14 AM

Meteorologist Kirstie Zontini looks at how the numbers have broken down for this warm week in February.

The Miami Valley saw record-breaking warmth this week.  

On Monday, temperatures climbed to 70 degrees, tying the record for the warmest day set back in 1939. The week continued to get warmer, and Tuesday morning temperatures never dropped below 61 degrees. This set a record for the warmest low temperature in Dayton for Feb. 20. The old record was 49 degrees set back in 1930.

>> WHIO Doppler 7 Interactive Radar

Things continued to heat up in the afternoon. Tuesday, the high temperature soared to 75 degrees smashing the old record for the warmest high temperature of 69 degrees which was set in 2016. The warmest February day ever on record is 76 degrees from February 24, 2017, making Tuesday the second warmest February day on record in Dayton.

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