-Weekly Weather Potpourri
-MPR listener question
-Almanac for June 10th
-Past weather features
Topic: June Heat
Last Friday, June 3rd brought record heat to some southern Minnesota communities. The following were new record highs for June 3rd: 93 degrees F at La Crescent and Amboy, 96 degrees F at Rochester, Waseca, Albert Lea, and Austin. It was short-lived as temperatures fell off into the 70s and 80s F for the weekend.
But on Monday, June 6th the heat returned for a longer stay in Minnesota. Many new record high temperatures were reported, including 97 degrees F at MSP International Airport and at Rochester, 99 degrees F at Windom, Worthington, and Austin, and 100 degrees F at Redwood Falls, Marshall, and Luverne. The statewide record of 106 degrees F at Pipestone in 1933 remained intact.
The National Weather Service issued Heat Advisories for June 6-7 as Heat Index Values were expected to approach or exceed 100 degrees F during the day and remain above 75 degrees F at night.
On Tuesday, June 7, more new record high temperature values were reported. It was arguably the hottest June 7th in state history, as many locations broke the statewide record high temperature of 100 degrees F (at Lamberton and Madison in 1987). Among those breaking the century mark were Red Wind, MSP, South St Paul, Rochester, Mankato, Owatonna, Blue Earth, Faribault, Mankato, St Peter, St Cloud, Collegeville, Gaylord, and New Prague. The 103 degrees F recorded at MSP will probably stand as the new state record for June 7th. It was the first time the Twin Cities has reached 103 degrees F in the month of June since 1934.
Weekly Weather Potpourri:
A tropical depression off the west coast of Mexico was expected to develop into a hurricane later this week, the first of the season in the Eastern Pacific Ocean. It is expected to remain out to sea and not track across Mexico.
Haiti was hit by heavy tropical rains this week which caused widespread flooding and killed up to 11 people. More heavy rainfall was expected later this week.
A recent NCAR paper documents how urban development can damper wind speeds throughout cities and cause higher build up of pollutants there. This study used findings in the Houston, TX area to assess how development affects heat storage and wind patterns that tend to disperse pollutants out of the city. You can read more at...
MPR listener question: How do the extreme temperature ranges for the summer months compare in Minnesota? Which month exhibits the highest range in temperature?
Answer: The all-time June temperature extremes are: 110 degrees F at Canby on 6/29/1031 and 15 degrees F at Bigfork on 6/1/1964 (a range of 95 degrees F); the all-time July extremes are 114 degrees F at Moorhead on 7/6/1936 and at Beardsley on 7/29/1917, and 24 degrees F at Tower on 7/7/1988 (a range of 91 degrees F); the all-time August temperature extremes are 110 degrees F at Montevideo on 8/1/1988 and at Beardsley on 8/10/1947, and 21 degrees F at Kelliher on 8/2/2002, and at Tower on 8/28/1986 (a range of 89 degrees F). So June the month with the longest daylength also has the highest range in temperature of the summer months.
Almanac for June 10th:
The average MSP high temperature for this date is 76 degrees F (plus or minus 9 degrees standard deviation), while the average low is 57 degrees F (plus or minus 7 degrees standard deviation).
MSP Local Records for June 10th:
MSP weather records for this date include: highest daily maximum temperature of 99 degrees F in 1956; lowest daily maximum temperature of 56 degrees F in 1945; lowest daily minimum temperature of 40 degrees F in 1877; highest daily minimum temperature of 73 degrees F in 1973; record precipitation of 1.77 inches in 1874; no measurable snowfall has been recorded on this date.
Average dew point for June 10th is 53 degrees F, with a maximum of 72 degrees F in 1918 and a minimum of 20 degrees F in 1972.
All-time state records for June 10th:
Scanning the state climatic data base: the all-time high for this date is 106 degrees F at Fairmont (Martin County) in 1933; the all-time low is 22 degrees F at Remer (Cass County) in 1985 . The all-time record precipitation amount for this date is 6.05 inches at Agassiz Refuge (Marshall County) in 2002. No measurable snowfall on this date in Minnesota.
Past Weather Features:
On June 10, 1897 between 2:00 pm and 7:00 pm an outbreak of severe weather brought five tornadoes to Minnesota. The first occurred near Willmar in Kandiyohi County, doing some damage to a farm. The second one occurred at 4:00 pm near Alden in Freeborn County where several farms were destroyed. A third tornado about 4:30 pm cut a zig-zag path across Waseca and Blue Earth Counties, damaging several farms along a 15 mile path. At 5:30 pm a small tornado formed near Glenville in Freeborn County but did little damage. The most destructive tornado, an F-4 (winds over 206 mph) passed six miles across Freeborn and Mower Counties damaging about 20 farms just north of the Iowa border, and killing three people.
June 8-9, 1985 brought a heat wave to many parts of Minnesota. Dozens of communities reported daytime highs in the 90s F, while at least 8 communities hit the 100 degrees F mark or higher. After reporting a high temperature of 102 degrees F on June 9th, the Faribault observer reported a strong cold front that dropped the temperature to just 47 degrees F on June 10th.
Over June 9-10, 2002 one of the heaviest thunderstorms to ever hit northwestern Minnesota passed across Roseau and Lake of the Woods Counties. The heavy rain started before midnight, and continued for much of the night and early morning hours. Many areas reported over 7 inches of rainfall, and one observer in Lake of the Woods County reported over 14 inches. The streets and properties in the city of Roseau were flooded by this rain storm.
Words of the Week: Heat cramps
This term refers to spasms or contractions in muscles of the abdomen, arms, or legs due to exercise and dehydration in hot weather. Sometimes they can be disabling and the person must cool down, and rehydrate with water, juice, or sports drinks before resuming activity. Heat cramps can afflict almost any ages, especially in weather that we had this week.
Cooler than normal temperatures to start the weekend. Increasing chances for showers late Sunday and into Monday. Warmer Monday and Tuesday with a chance for thunderstorms.
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