83 F. average high on August 1.
87 F. high on August 1, 2014.
August 2, 1831: Cold outbreak across Minnesota with light frost reported at Ft. Snelling.
"...Although there are no official records, 178 degrees (81 Celsius) is the highest known heat index ever attained. It was observed in Dhahran, Saudi Arabia on July 8, 2003..." - from an article at Capital Weather Gang below, providing perspective for Friday's 165F heat index in Iran.
Everything is relative, especially weather. Residents of Atlanta laugh when we complain about a 95-degree heat index. We scoff when Arizonans complain about 30s. It's all a function of what you're accustomed to; what falls within the window of "typical weather".
Many of us have experienced "beastly-heat", where nothing you do can cool you down, where you perspire with zero physical exertion. I don't think any of us can fathom what a heat index of 165F is like. On Friday the city of Bandar Mahshahr, Iran, on the Persian Gulf, registered a temperature of 115F with a dew point of 90F.
By the way the highest heat index ever recorded was in Dhahran, Saudi Arabia on July 8, 2003. The temperature hit 108F with a dew point of 95F, making it feel like 178F! May I please be excused?
And here we sit - this week's weather map looks like something out of September with highs in the 70s and low humidity, all thanks to a persistent northwest wind flow aloft. A quick shower may pop today behind a puff of slightly cooler air.
By midweek wake-up temperatures dip into the 50s. Not exactly sweatshirt weather but Minnesota may just wind up largely dog-day-free this summer.
Graphic credit above: "
Hurricane Wilma file image: NOAA.
TODAY: Warm sun, stray T-shower possible. Winds: NW 10-20. High: 86
SUNDAY NIGHT: Clearing and more comfortable. Low: 60
MONDAY: Comfortable sun. Dew point: 53 NW 15. High: 80
TUESDAY: Vague hints of September. Partly sunny and very nice. Wake-up: 58. High: 78
WEDNESDAY: Few T-showers southern Minnesota? Wake-up: 59. High: 77
THURSDAY: Plenty of warm sunshine. Wake-up: 63. High: 80
FRIDAY: Intervals of sun, temperatures closer to normal. Wake-up: 62. High: 81
SATURDAY: Chance of showers, T-showers. Wake-up: 61. High: 80
Earth Now Halfway to U.N. Global Warming Limit. New Scientist has the details; here's the intro: "It's the outcome the world wants to avoid, but we are already halfway there. All but one of the main trackers of global surface temperature are now passing more than 1 °C of warming relative to the second half of the 19th century, according to an exclusive analysis done for New Scientist. We could also be seeing the end of the much-discussed slowdown in surface warming since 1998, meaning this is just the start of a period of rapid warming. “There’s a good chance the hiatus is over,” says Kevin Trenberth of the National Center for Atmospheric Research in Boulder, Colorado..." (Graph credit: Kevin Cowtan of the University of York).
Photo credit above: "
Graphic credit above: "Comparison of 84 climate model simulations (using RCP8.5) against HadCRUT4 observations (black), using either air temperatures (red line and shading) or blended temperatures using the HadCRUT4 method (blue line and shading). The upper panel shows anomalies derived from the unmodified climate model results, the lower shows the results adjusted to include the effect of updated forcings from Schmidt et al. (2014)."
* The Carbon Brief has more perspective on climate models vs. reality and actual performance metrics.