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January 24-26: Miracle or Mirage JV/Banter Thread!


SnowenOutThere
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It would seem, with all the computing power availible out there today they could make a snowfall algorithm that actually works.

Instead we have 10:1 maps and Kuchara maps.

10:1 Maps:  Heavy sleet for a few hours, you get a foot of snow.

Kuchara Maps: 0.12" qpf with a temp of 6F, 100:1 ratios, you get a foot of snow.

Both algorithms clearly are going to exagerate totals in this case. There could and should be something better. 

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4 minutes ago, Maestrobjwa said:

Yeah probably. Can't imagine anybody is gonna be able to do much of anything Monday morning, lol

I expect Monday closed. Maybe Tuesday depending on how long precip goes into Monday. If not closed Tuesday at least a delay

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AI overview of the effectiveness of salt as a function of temperature.
 
"Different salts work for different temperatures, with 
calcium chloride best for extreme cold (down to -25°F), magnesium chloride for moderate cold (around 10°F), and standard sodium chloride (rock salt) effective only above 15°F, making blends or specialized products better for deep freezes. 
 
Salt types by temperature
  • Above 15°F: Sodium Chloride (rock salt) is affordable and works for light cold.
  • 10°F to 20°F: Magnesium Chloride handles teens and regular cold, absorbing moisture.
  • Below 10°F: Calcium Chloride is best for extreme cold, melting quickly and working down to -25°F.
  • Blends: Many commercial ice melts use blends (like calcium chloride/magnesium chloride) for broader effectiveness. 
 
Key considerations
  • Speed: Calcium chloride melts ice faster than sodium chloride.
  • Pet/Plant Safety: Magnesium chloride is a less harmful option for pets and plants, while calcium chloride can damage lawns if overused.
  • Application: Use ice melt before snow to prevent bonding, and apply sparingly to avoid damage. " 
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Just now, mappy said:

I expect Monday closed. Maybe Tuesday depending on how long precip goes into Monday. If not closed Tuesday at least a delay

Worth adding I can also see Hereford zone staying closed longer than rest of the county 

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3 minutes ago, H2O said:

None of those salts can be used for margs, can they?  Asking for a friend

According to AI, table salt is too fine, dissolves too fast, and contains additives that create a sharp, unpleasant flavor.  So perhaps they would work better than table salt - but kosher salt recommended. 

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22 minutes ago, WxUSAF said:

Throw in the frigid Tuesday morning temps and I’ll be shocked if school systems open. Would take a major forecast bust 

Fairfax County has end of the quarter teacher workdays on Thurs/Fri and an early dismissal on Wednesday.  There's basically no chance my kid will be in school next week.

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I worked for a company based in London for a few years, and they would always say things like "we'll meet at 2pm GMT" etc - and I had to remind them that in the summer, they are BST, which is GMT+1.  It sounds pedantic, but since EDT is GMT-4, but London is generally always 5 hrs ahead (except for the weird misalignment of the daylight savings start/end), the meeting time would not be clear.

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