85 F. high in the Twin Cities Thursday.
80 F. average high on August 21.
88 F. high on August 21, 2013.
.07" rain fell at MSP International Airport yesterday.
August 21 in Minnesota Weather History:
1910: Daylight is dimmed in Duluth due to smoke from Rocky Mountain forest fires.
1870: Downpours across southern Minnesota with 5 inches at Sibley, and 3.49 at Ft. Snelling. Much of the wheat crop was damaged.
The urban heat island is real; cities are hotter than surrounding suburbs. That's why climate records are maintained at sites well away from the asphalt and concrete of city cores.
The planet is warming, but cities are heating up much faster. A new report from Climate Central finds that the Twin Cities metro has the 9th most intense summer urban heat island of America's top 60 cities, with a daily average rural-urban temperature difference of 4.3F. Las Vegas is at the top of the list; The Strip a whopping 7.3F warmer than surrounding deserts.
80 percent of Americans live in cities and the urban heat island is heating up our metro areas much faster than rural areas. Details on the blog below.
Clouds kept us a bit cooler yesterday, but hazy sun should lure the mercury well into the 80s today and Saturday; low 90s possible Sunday with a debilitating dew point near 70F. Serious Dog Days.
I expect a dry sky at the State Fair today and much of tomorrow; a few storms rumble in late Saturday.
Mother Nature appears manic: a sizzling Sunday gives way to fresh air by midweek - lows near 50F by Thursday. Heat builds again late next week as 80s return.
Summer spills into September this year.
* ECMWF forecast valid next Wednesday evening courtesy of WSI. The European model hints at a close encounter for the Outer Banks of North Carolina, but keeps any tropical system offshore. We'll see.
Graphic credit above: Hsiang and Jina, July 2014
Image credit above: "By using GPS signals to monitor the atmosphere in three dimensions, the FORMOSAT-3/COSMIC satellite constellation has led to improved global weather monitoring, especially in data-sparse regions." (Image courtesy UCP/COSMIC).
Photo credit above: "Charley was the first of four hurricanes to strike Florida in 2004." (Andrea Booher/FEMA).
Photo credit above: "Each year, thousands of attendees dress alike for Twins Days. These twins were taking a dip in the pool at the Bertram Inn and Conference Center in Aurora, Ohio on the first day of the festival." (Charles Robinson).
TODAY: Partly sunny, sticky and dry. Dew point: 67. Winds: NE 5. High: 85
FRIDAY NIGHT: Warm and sultry. Low: 71
SATURDAY: Murky sun, T-storms rumble in late. Dew point: 70. High: 86
SUNDAY: Stinking hot. Hot sun much of the day. Late day storm risk. Wake-up: 74. High: 91 (Heat Index near 100 by late afternoon?)
MONDAY: Blue sky, less humid. Dew point: 56. Wake-up: 67. High: 80
TUESDAY: Clouds, few showers likely. Wake-up: 63. High: 74
WEDNESDAY: Some sun, fresh air! Dew point: 49. Wake-up: 57. High: 72
THURSDAY: Bright sun, spectacular. Dew point: 47. Wake-up: 52. High: 76
Weather extremes in the summer — such as the record heat wave in the United States that hit corn farmers and worsened wildfires in 2012 — have reached an exceptional number in the last ten years. Man-made global warming can explain a gradual increase in periods of severe heat, but the observed change in the magnitude and duration of some events is not so easily explained. It has been linked to a recently discovered mechanism: the trapping of giant waves in the atmosphere. A new data analysis now shows that such wave-trapping events are indeed on the rise.A number of studies in recent years have linked this quantum jump in extreme weather to global warming and the warming-driven loss of Arctic ice (see here and here). Jennifer Francis of Rutgers University’s Institute of Marine and Coastal Sciences has been at the forefront of this research. She explains her findings in this video..."
Map credit above: "GFS temperature and rainfall analysis for Greenland on August 21, 2014. Note the above freezing temperatures and rainfall over the region of the Jacobshavn Glacier for today." Image source: University of Maine’s Climate Reanalyzer.