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[Phys-l] Glaze Ice



Thought you might enjoy a short account of a relatively rare weather event.
It is said to be a scourge of airmen, but I saw its effects from the ground.

The weather forecast called for freezing rain.
With temperatures near 0 degC a mix of rain with some pellets fell.
Nothing out of the way so far. But the rain soon filled trees with icicles, and a glassy coat, so that a pencil thick twig became a one inch diameter rod of clear glass.
Within minutes, tree branches started crackling and falling in every city street (and across numerous counties of SW Oklahoma.) Power lines were pulled down by these impacts, but more strangely, rows of power poles fell to the ground, seven and eight at a time under the ice load with just a modest cross wind under 15 kts.

The city power faltered and came back until Thursday afternoon, then the town and surroundings fell quiet and dark as the power distribution network (pole) towers also fell.

People with generators hooked them up. Gasoline and diesel to replenish them was a problem - with no power at gas stations. The first supplier within ten miles of me started selling into jerry-cans from a DC electric gas pump dipped in his fuel station tank. The pump was driven from his idling diesel truck battery.
Others followed hours and days later with generator power, serving half mile lines of waiting cars. A free enterprise trade sprang up in two days with generator sets sold from delivery trucks. A hardware store was escorting customers into its dark sales shelves with hand written sales tallies.
Cash and checks were acceptable currency.
The current estimates suggest several thousand power lines and power poles down and broken. Stores are functioning with generators, and industrial generators are supporting water supplies, sewage pumps.

The power lines feeding domestic cables are often sited in back allies intended for trash removal etc. The electrical utility supervision is observing that house holders who have extended their garden fences into the alley access, or even worse, have closed off access on one side with fences and buildings,
will pay for it in reduced access by heavy post hole diggers and cherry pickers....
[Five days, and counting...]

Brian W with 58Hz 111volt electrons...