Rare 90 F days emerge this week:
For the summer of 2015 temperature readings in the 90s F have indeed been infrequent. I have already commented about this feature in the Twin Cities urban heat island where there have been only two days with 90 F or higher temperatures this summer, compared to a historical average of 14 days. In other portions of Minnesota the same temperature pattern has prevailed. Historically Crookston and Moorhead show an average of 10 days with 90 F or greater temperatures by this date, but they have only reported one such day so far. Even at Montevideo, one of the warmest places in the state, the daytime high has only reached 90 degrees F or greater 5 times this summer, while the historical average is 17 days. So you can clearly say that farm crops have benefited from the relative lack of heat stress this summer (so far).
Weekly Weather Potpourri:
NOAA scientists offered an El Nino Update this week. The forecast calls for continued El Nino conditions through the autumn and into the early winter season when it is expected to peak. It is likely to be one of the strongest El Nino episodes since 1950. As such this El Nino will be utilized as a forecast tool for the autumn and winter seasonal climate outlooks across the USA.
MPR Listener Question:
Twin Cities Almanac for August 14th:
MSP Local Records for August 14th:
MSP weather records for this date include: highest daily maximum temperature of 96 degrees F in 1978; lowest daily maximum temperature of 65 degrees F in 1887: lowest daily minimum temperature is 43 degrees F in 1964; highest daily minimum temperature of 72 F in 1938, 1970, and 1978; record precipitation of 1.00 inches 1981; and no snowfall has been recorded on this date.
Average dew point for August 14th is 60 degrees F, with a maximum of 76 degrees F in 1978 and a minimum of 32 degrees F in 1933.
All-Time State Records for August 14th:The state record high temperature for this date is 105 degrees F at Hawley (Clay County) in 1984. The state record low temperature for this date is 25 degrees F at Tower (St Louis County) in 1977. State record precipitation for this date is 5.29 inches at Gaylord (Sibley County) in 1981; and there has not been any snowfall on this date.
Past Weather Features:Between 5pm and 6pm on August 14, 1914 an F-2 tornado (winds 113-157 mph) was on the ground for 20 miles between Morris and Hancock in western Minnesota. It damaged or destroyed 30 farms and killed one farmer. In addition many grazing animals, including cattle were killed.
August 14, 1964 brought damaging frost to many parts of northern Minnesota. Bigfork reported a morning low of 27 degrees F while Cook reported 28 degrees F. In southeastern Minnesota frost was reported in Theilman (Wabasha County) and at Preston (Fillmore) where the corn crop was damaged and had to be harvested for silage.
One year later brought the hottest August 14th of all-time. In 1965 over 30 Minnesota communities reported an afternoon temperature of 95 degrees F or greater, and at 8 communities the thermometer broke 100 degrees F. The August Heat Wave of 1965 ran from the 11th to the 15th, ending abruptly with thunderstorms that dropped temperatures into the 60s and 70s F around the state late on August 15th.
Over August 14-15, 1981 strong thunderstorms crossed over southern Minnesota counties bringing hail, high winds, and heavy rainfall to many areas. Numerous observers reported between 2 and 3 inches of rainfall, while New Ulm received over 4 inches and Gaylord reported over 5 inches.