A Hot June 9th:
99°F at Madison
97°F at Marshall
96°F at Minnesota City Dam
96°F at La Crosse, WI
95°F at Sioux Falls, SD (tied record)
93°F at Rochester (tied record)
Large hail and thunderstorm winds up to 60 mph came with a few thunderstorm cells on Tuesday, June 9th as well. Portions of Stevens, Lincoln, Yellow Medicine, and Sherburne Counties reported hail of one inch diameter or greater, and wind gusts over 60 mph were reported from Murray and Stearns Counties.
An odd spike in evening dew point occurred at both St Paul and Red Wing about 7pm in the evening. Following brief showers in both communities the dew point soared to 70°F at the University of Minnesota St Paul Campus, and climbed to 69°F at Red Wing along the Mississippi River, making the outside air briefly feel like a steam bath. These values were close to record high dew points for the date and occurred near the time of the collapse of the daily boundary layer in the atmosphere when the vertical mixing depth begins to shrink, so more water vapor is held in the air closer to the Earth’s surface.
Retirement Congratulations to Dave Ruschy:
Weekly Weather Potpourri:
MPR Listener Question:
Northwestern Minnesota: Moorhead with 10.46 inches (115 percent of normal)
North Central Minnesota: Cass Lake with 12.10 inches (126 percent of normal)
Northeast Minnesota: Grand Portage with 11.58 inches (107 percent of normal)
Western Minnesota: Montevideo with 11.59 inches (120 percent of normal)
Eastern Minnesota: North Branch with 11.81 inches (119 percent of normal)
Southwestern Minnesota: Lake Wilson with 12.10 inches (106 percent of normal)
Southern Minnesota: La Crescent with 16.17 inches (117 percent of normal)
Twin Cities Almanac for June 9th:
MSP Local Records for June 12th:
MSP weather records for this date include: highest daily maximum temperature of 95 degrees F in 1956; lowest daily maximum temperature of 51 degrees F in 1929: lowest daily minimum temperature is 39 degrees F in 1877; highest daily minimum temperature of 72 F in 1920; record precipitation of 2.35 inches 1899; and no snowfall has been recorded on this date.
Average dew point for June 12th is 55 degrees F, with a maximum of 74 degrees F in 1961 and a minimum of 30 degrees F in 1969.
All-Time State Records for June 9th:
Past Weather Features:
A 2-day Heat Wave dominated much of Minnesota over June 12-13, 1893 bringing 90°F temperatures or greater to over 30 communities. Moorhead and Crookston saw afternoon temperatures over 100 degrees F, while Montevideo reached an afternoon high of 95°F and the nighttime low never fell below 76°F. Fortunately a cooling rain brought temperatures back to seasonal normals on June 14th.
Severe thunderstorms erupted across portions of southern Minnesota over June 11-13, 1899 bringing rainfall amounts from 6 to 10 inches. Flash flooding occurred on the Root and Zumbro Rivers and many crops were washed away by erosion in Mower, Winona, and Houston Counties. All of the flooding in Minnesota was overshadowed by a destructive F-5 tornado (winds greater than 260 mph) which leveled New Richmond, WI demolishing over 300 buildings and killing 117 people.
On June 12, 1917 the ice pack finally broke up and disappeared out of Duluth Harbor, after the long and cold winter of 1916-1917. This remains to this date one of the latest sightings of ice in the harbor.
June 12, 1985 brought frosts to northeastern sections of the state, where Tower reported a morning low of 26°F and Virginia just 30°F. Scattered ground frost was reported around southern Minnesota.