Snow This Thursday/Friday

[FLguy]

aside from determining snow to liquid ratios, 1000-500mb thicknesses, and corresponding 850-500mb, and 1000-850mb partial thickness methods are for the most part useless in determining precip type. which is where soundings come in since there can be a near or above freezing layer within the column which partial thickness methods cannot resolve.

[Stormsfury]

Since I was not even 7 years old during the time of the President's Day Blizzard, I didn't exactly know the synoptic setup and found some surprises...but I'm positive it was a classic CAD event ... especially to get a severe icestorm in CHS ...

SF

[FLguy]

Since I was not even 7 years old during the time of the President's Day Blizzard, I didn't exactly know the synoptic setup and found some surprises...but I'm positive it was a classic CAD event ... especially to get a severe icestorm in CHS ...

SF

i wasnt even born yet, so i sure as hell would not know. but yes i does look like it had a classic CAD signature. based on thicknesses.

BTW i think you can overlay the 1000-850 field over the 850-500 field as well with the PSC reanalysis data. that should give a btter idea o fthe anture of the situation.

[Stormsfury]

Based on the 850mb ABS VORT it definitely appears that there was a s/w that dove from MT (Alberta Clipper or Saskatchewan Screamer, but there was a TON of cold air in the country and quite possibly split flow ...

Maybe not, but on February 18th, there was a SCREAMING 140kt+ jet ....

February 18th, 1979 - 200mb wind speed

February 19th, 1979 - 200mb wind speed

Hmmm ... 850mb dewpoints ... signs of CAD ...

February 18th, 1979 - Dewpoints 850mb -