83 F. average high on July 25, 2015.
81 F. high on July 25, 2014.
July 26, 1981: Chilly morning across northland with 33 degrees at Roseau and Wannaska.
An Irritating Smudge
Radar technology gave the allied powers a distinct advantage during World War II. Tracking enemy planes and ships in real time provided a military edge. Around 1941 British radar operators noticed irritating smudges on their screens; interference that made it harder to pick out legitimate targets. It quickly dawned on them that they were witnessing rain shafts, and the race was on to perfect "Radio Detection And Ranging" or radar for short.
Today's sophisticated "dual-polarization" Doppler radars not only see wind circulations within storms but can signal precipitation type, even detect clouds of debris thrown up by a tornado on the ground.
Satellites, transistors, the Internet, moon walks - you can make a strong argument that conflict is the mother of invention.
No weather drama today, although a few cumulonimbus may mushroom to life near the Iowa border. A surge of moisture from the Gulf of Mexico will cause the dreaded dew point to rise into the 70s Monday and Tuesday. If you factor low 90s each afternoon the heat index may top 100F both days. Something to look forward to.
Strong to severe T-storms Tuesday mark the leading edge of cooler, cleaner Canadian relief.
* File radar image above courtesy of Wikipedia.
Summer temperature data courtesy of AerisWeather meteorologist D.J. Kayer.
"Friday night was a close call with the weather. We took our daughter and a friend to Country Jam. By the time the headliner, Blake Shelton, took the stage, a storm was moving into Chippewa County to the north. It was quite the lightning show, but it looked like the storm would pass 15 miles to the north of the concert site. When a tornado warning was issued within the county, local emergency managers decided to shut down the concert and send approximately 25,000 home..."
TODAY: Sticky sunshine, isolated T-shower. Winds: SE 8. High: 87
SUNDAY NIGHT: Warm and muggy - stray thunder. Low: 72
MONDAY: Partly sunny. Feels like 95-100F. High: near 90
TUESDAY: Some sun, sweltering. Few severe storms? Feels like 100F. Wake-up: 74. High: 92
WEDNESDAY: Sunny, turning less humid. Wake-up: 69. High: 87
THURSDAY: Plenty of sun, quite pleasant. Wake-up: 65. High: 85
FRIDAY: Warm sunshine, hit the road early. Wake-up: 66. High: 86
SATURDAY: Sunny start, late-day T-storms? Wake-up: 68. High: 88
Photo credit above: "The future is grim for private holdings in fossil fuel companies over action – or inaction – around climate change." Photograph: Daniel Reinhardt/EPA.
July 23 photo credit: Ian Thomas Jansen-Lonnquist/The New York Times.
Photo credit above: "Rear Admiral David Titley tours the USS Slater in Albany, N.Y. April 26, 2012, as part of the United States Navy's 50/50 Program, an outreach effort that features 50 senior Navy leaders in 50 U.S. cities." (Skip Dickstein/Times Union archive)
A New Climate Change Danger-Zone? Elizabeth Kolbert takes a look at the recent fuss over climate scientist James Hansen's latest research on the rate of Antarctic ice and the level of risk posed to coastal cities. Here's an excerpt at The New Yorker: "...In a paper set to appear online this week in Atmospheric Chemistry and Physics, the modellers, led by James Hansen, the former director of NASA’s Goddard Institute for Space Studies, warn that an increase of two degrees Celsius could still be enough to melt large portions of Antarctica, which, in turn, could result in several metres’ worth of sea-level rise in a matter of decades. What’s important about the paper from a layperson’s perspective—besides the fate of the world’s major coastal cities, many of which would be swamped if the oceans rose that high—is that it shows just how far from resolved, scientifically speaking, the question of danger levels remains. And this has important political implications, though it seems doubtful that politicians will heed them..."