2:45 PM | Another chilly air mass for this time of year coming next week

[Euro 500 mb height anomaly map for next Wednesday; courtesy Weather Bell Analytics at weatherbell.com]

Discussion

The same overall weather pattern that produced a colder-than-normal winter in much of the eastern half of the nation and an impressive cool shot last week will produce another cool shot during the first half of next week in the same general area. Once again, it appears that the pattern is unfolding to allow for the development of a significant trough in the upper atmosphere early next week in the eastern part of the nation and it will be centered on the Upper Midwest. This will produce below normal temperatures for several days in this part of the country with the biggest departure from normal once again focused on the Upper Midwest. Yesterday’s European computer forecast model run for the middle of next week suggests there will be a deep trough of low pressure for this time of year centered over the Upper Midwest – the same type of pattern that we’ve experienced frequently during the past several months (map courtesy Weather Bell analytics at weatherbell.com).

[Temperature records courtesy NOAA]

Last week’s widespread cool shot was impressive indeed with 2085 cold temperature records set across the nation in the past 7 days as compared with 281 warm temperature records (data courtesy NOAA). It is too early to tell if this next shot of cool air will produce widespread record-breaking chill, but below normal temperatures are very likely (NOAA 6-10 forecast temperature anomaly map shown below for the period July 27th through July 31st).