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WARM STREAK SINCE MAY TO END.......MAY RETURN IN LATE AUGUST

After a cold April, most of the days since May 1 have been above normal, with the greatest excesses in May. A cooler pattern overall should settle in late July-part of August

Posted: Jul. 11, 2018 9:39 PM
Updated: Jul. 11, 2018 10:21 PM

82% of the days since May 1 have been above normal.  Although the greatest excesses above normal were in May, the extra heat led to rapid growth & advancement of local crops after a dismally-cold April. 

Although the warmth has been noticeable, we have not had any major, major heat wave with temperatures reaching 100.  Rather, it has been a consistent warmth with above normal means over a long period of time.  Any days below normal have tended to be tied to more widespread heavy rainfall & cloud skies holding the temperature down & not necessarily a strong cold front.

With the warmth, rainfall has been ample over the area after a very dry May that snuck into June for part of the area.

Now, the trend is for more below normal temperature to consistently occur late July & into part of August (looks like we may have an intense heat resurgence in late August to perhaps early September).

May 1 to July 11 Purdue Universiry Airport ASOS weather station temperature anomalies are shown below.  I also have projections, based on current data, for July 12-31.  Should this hold, the 6 consecutive day period of below normal temperature July 22-27 would be the longest since April 25-30.

Another interesting note is regarding to the May heat.  The near/record Memorial Day period heat wave brought temperatures of 95-99 to the area.  This made it the hottest Memorial Day since 1911 (some places even exceeded it). 

Less than 1 percent of all years since 1879 at West Lafayette have seen the maximum temperature for the year occur in May.  Overall, just 4% of the years have the maximum temperature in June.

The normal highest temperature of the summer occurs between July 15 & 22, as a whole, for our area. 

Also, temperatures exceeding 95 occur every 2.5 years over much of the area.

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