Preliminary June Climate SummaryMost observers reported a near normal June mean temperature this year, with a few northern locations reporting slightly cooler than normal values. The highest temperature for the month occurred on the 20th with 91 degrees F at MSP, Amboy, and Madison. The lowest temperature for the month was 26 degrees F at Embarrass on the 3rd.
Like previous months this year, June turned out to be wetter than normal for most Minnesota observers. Exceptions were some areas of northern Minnesota which received less than normal rainfall for June. For some Minnesota communities it was a very wet month indeed. Among those reporting over 9 inches for the month were Morris, Albert Lea, Wells, Caledonia, Preston, and Spring Grove. The June rainfall of 12.13 inches at Spring Grove is a new record total for the month surpassing 11.70 inches in 2000, while the 12.58 inches reported from Wells, MN is also a new June record for them.
As a precursor to the abundant rainfall this month, the first week of June was the cloudiest in over 50 years with very little sunshine. Heavy rains, high winds and hail occurred in southern Minnesota on June 12th, with baseball size hail reported near Wells. Similar weather occurred across east-central Minnesota over Father's Day weekend (June 15-16), and again over southwestern Minnesota on June 18th. Heavy rains with high winds swept across central portions of the state over June 20-22, causing street flooding, tree damage, and widespread power outages, especially around the Twin Cities Metro Area. Lastly, over June 25-26 heavy thunderstorms over northern Wilkin County and southern Clay County brought 6-8 inches of rainfall and sent a flood crest down the Red River. You can read about this storm here.
July 4th climatologyFor the Twin Cities area rain has occurred on this holiday 49 times since 1891, the highest frequency of precipitation for all major holidays of the year. The longest streak of rainy Independence Days was six consecutive years from 1900 to 1905, with July 4th, 1900 being the wettest ever as 2.27 inches of rain fell from a thunderstorm. The holiday was rain-free for six consecutive years from 1939 to 1944 and again from 1952 to 1957.
In terms of temperature, the average high temperature for the date is 82 F and the average low 62 F. The average dew point is 59 F, but has been as high as 79 F (1999). The Heat Index (derived from temperature and humidity or dew point) has been uncomfortably high on the 4th of July a number of times. HI values above 90 F have occurred on 22 occasions since 1891. There have been eight July 4th holidays when the HI value exceeded 100 F, most recently 2012 when it hit 108 degrees F (with a record high temperature of 101 degrees F). The worst case was a Heat Index of 112 F in 1949. This was the cause of 12 heat related fatalities that year in the Twin Cities. The coldest daytime temperature on July 4th was just 58 degrees F in 1967. Early indications are we might be cooler than normal for this coming July 4th.
Weekly Weather potpourriThe NOAA National Weather Service Forecast Office in Las Vegas, NV is putting out an interesting forecast for that area of the country this weekend. Here are the weekend forecasted highs:
Las Vegas, NV 113 degrees F
Kingman, AZ 110 degrees F
Death Valley, CA (Furnace Creek) 129 degrees F
Needles, CA 125 degrees F
Bullhead, AZ 124 degrees F
These are near record values for this time of year.
Earlier this week NOAA released estimates of the economic impact of weather and climate events during 2012. Super Storm Sandy inflicted damage costs estimated at $65 billion, while yearlong drought conditions resulted in approximately $30 billion. The total bill for 2012 was estimated to be $110 billion, the 2nd costliest year in terms of weather and climate related disasters since such record keeping started in 1980. You can read more here.
Earlier this week President Obama presented a plan for dealing with climate change, most of which does not require the approval of Congress. He ask for actions to curb emissions and to find ways to adapt to climate change. He also said he has no patience for those who deny it is happening. You can read the full text of his speech at the White House web site.
MPR listener questionDid we see the highest dewpoints of the year so far this week? It was very hot and sticky on Wednesday as I drank over a gallon of water while pouring a new concrete sidewalk in Wayzata.
Answer: Yes indeed. Dew points ranged between 70 and 76 degrees F on Wednesday (June 26) this week, making the outside air feel like the mid to upper 90s F. In fact the Twin Cities reported four consecutive days this week, June 23-26, when the dewpoint hit 70 degrees F or higher, topping out at 74 degrees F on Wednesday. Though not quite record daily values, these are still very high for this time of year in Minnesota.
Twin Cities Almanac for June 28thThe average MSP high temperature for this date is 81 degrees F (plus or minus 8 degrees F standard deviation), while the average low is 61 degrees F (plus or minus 7 degrees F standard deviation).
MSP Local Records for June 28thMSP weather records for this date include: highest daily maximum temperature of 102 degrees F in 1931; lowest daily maximum temperature of 64 degrees F in 1923; lowest daily minimum temperature of 47 F in 1924; highest daily minimum temperature of 82 F in 1931; and record precipitation of 3.60 inches at Moorhead (Clay County) in 1897; No snow has been recorded on this date.
Average dew point for June 28th is 59 degrees F, with a maximum of 77 degrees F in 1996 and a minimum of 33 degrees F in 1925.
All-time state records for June 28thThe state record high temperature for this date is 108 degrees F at Canby (Yellow Medicine) in 1931. The state record low temperature for this date is 24 degrees F at Sawbill Camp (Cook County) in 1936. State record precipitation for this date is 5.70 inches at Fosston (Polk County) in 1921; and no snow has fallen on this date.
Past Weather Features:A Heat Wave prevailed over the state during June 26-30, 1931. The hottest June 28th in state history brought high temperatures of 100 degrees F or greater to over 24 Minnesota communities, topped by 108 degrees F at Canby. In fact Canby, Montevideo, Willmar, Tracy, and Winona all reported 5 consecutive days with afternoon highs of 100 degrees F or greater. Thankfully a cold front swept in over July 1-2 and dropped temperatures by 25 to 35 degrees F.
Heavy rains rescued Minnesota crops from drought over June 25-28, 1959. Rainfall amounts from 2 to 5 inches fell that week just as crops were withering from drought conditions. Some observers reported record-setting amounts of rain on the 28th, including Winnebago with 3.51 inches (still a record today).
June 28, 1983 brought record cold to northeastern Minnesota counties where a number of observers reported overnight lows of 27 to 31 degrees. There were many frosted gardens.