Extreme Temperatures
The Mountain Weather Information Service has forecast showers and hail for parts of the Southeastern Highlands, with the possibility of snow on the highest peaks.
The weather service also predicts that temperatures will drop as low as 3C, with a "slight frost" expected in areas around Loch Tay, Loch Rannoch and the southern Cairngorms.
Meanwhile drivers on the east coast A90 have spotted a gritter on the roads - as councils prepare for the onset of winter after summer appears to have passed Scotland by.
The forecasts come as figures show that some areas in Scotland have had more than double the average expected rainfall for July.
First Alert Chief Meteorologist Mark Heyka says snow can be expected above 8,000 feet Monday in western and southwestern Montana.
The Interactive Tram Cam faces down from the top of the Lone Peak Tram at 11,166 feet and faces the Mountain Village.
The combination of moisture and cold air from Alaska and Canada was expected to settle over Idaho, Montana and Wyoming through Tuesday in a pattern rarely seen in those states before late August or September, forecasters with the National Weather Service said.
More than an inch of snow was reported on Monday at the renowned ski resort of Jackson Hole, Wyoming, and in the mountains of western Montana and central Idaho near Salmon, where local farmers scrambled to cover crops and potentially run sprinklers to prevent frost damage.
That looks like enough ice to cover all of the state of Illinois.
Not sure I'd want to go kayaking there quite yet.
Thanks to J Philip Peterson for this link

The CCGS Pierre Radisson escorts the oil tanker Havelstern to Iqaluit July 17. Tough ice conditions in area have delayed this summer's annual resupply.
"Obviously it has a large impact on us," says Martin Fortier, executive director of ArcticNet, which coordinates research on the vessel. "It's a frustrating situation."
During the summer, ArcticNet utilizes the Amundsen as a floating research center, running experiments 24 hours a day.

Sunday morning, July 19 2015, at Drekagil near Askja and Holuhraun in the North-East region of Vatnajökull National Park
On Sunday, the ground was white with snow all around the highlands in Central Iceland.
"Everything was white. When we got up at 9AM the snowfall was mostly over, but by the time we left, around noon, it had started up again," Þorgerður Eva Þórhallsdóttir, a member of the Search and Rescue team in Skagafjörður, North Iceland, told Morgunblaðið.
"I think this is rather abnormal weather for the middle of the summer. It wasn't like this last year."

A first? Wildfire torches moving vehicles on highway near Los Angeles, California
Record high temperatures in Germany were immediately followed by unusually strong storms and hail. Record rainfall in China was followed by a record heatwave there. In the US, there's been a record heatwave in the West, and record rainfall in the South. There's been record cold in Australia, and record heat in Pakistan. Volcanoes erupted in Indonesia, Japan and Mexico, while there was a strong earthquake in China and an earthquake swarm in Iceland... And in between all that; powerful storms and record rainfall.
Things be intensifying!
The mudflows have caused damage to buildings and infrastructure in local villages. The debris has also blocked the flow of the Gund river, creating an artificial lake which has flooded areas along the river.
As of 18 July 2015, the UN's Rapid Emergency Assessment and Coordination Team (REACT) in Tajikistan reports that at least 56 houses have been destroyed and 10,000 people forced to evacuate to safer sites. Schools, stores, roads and electricity lines have also been damaged and 80% of the communities in the region have been without electricity. No casualties have been reported.
There is a risk of the lake overflowing or breaking through its temporary blockage. REACT say that this could cause devastating floods in Khorog and nearby communities, including three districts of Khatlon Oblast.
Adorable pictures of wombats, emus, Tasmanian devils and kangaroos caught out in the snow were posted on social media throughout the day, with the animals seemingly as surprised by the wintry blast as the rest of us.

A kangaroo was caught out in the unexpected snow that blanketed parts of Australia, including Orange, NSW (pictured)
One of the photos showed a snow-dusted recreation of Australia's coat of arms, with an emu and kangaroo locked in an intense stare down. Presumably, neither took a backwards step.

Heavy snowfall in the Eastern Cape has resulted in motorists being warned to make use of alternative routes as mountain passes on two national roads have been closed indefinitely due to the snowfalls.
According to Snow Report the Lootsberg Pass between Middelburg and Graaff Reinet, forming part of the N9, as well as the Penhoek Pass between Aliwal North and Queenstown, forming part of the N6, have been closed indefinitely, due to the heavy snowfall.
The Barkly Pass on the R58 between Barkly East and Elliot and the Boesmanshoek Pass between Steynsburg and Elliot have also been closed.
Here are some pictures sent into Snow Report on their Facebook Page of the snow.
Comment: All of which is more than a little reminiscent of a similar fiasco in the Antarctic last year: Ship of fools: Icebound expeditioners apologise for Antarctic rescue mission
'Stuck in our own experiment': Leader of trapped team insists polar ice is melting against evidence of his own experience