In situations which snow occurs with strong winds, determining a depth and sometimes even a liquid equivalent can be difficult. The METAR reports from Mount Pocono airport:
KMPO 142253Z AUTO 32020G28KT 1SM -SN BR BKN008 OVC014 M02/M04 A2928 RMK AO2 PK WND 33033/2200 SLP925 P0000 T10221044 TSNO= KMPO 142353Z AUTO 32026G34KT 3/4SM -SN BR BKN003 OVC014 M03/M06 A2926 RMK AO2 PK WND 32034/2348 SLP919 P0000 60009 T10331056 10100 21033 50008 TSNO= KMPO 150053Z AUTO 32022G34KT 3/4SM -SN BKN010 OVC016 M04/M07 A2929 RMK AO2 PK WND 33038/2355 SLP930 P0000 T10391067 TSNO= KMPO 150153Z AUTO 33026G34KT 1SM -SN BKN004 OVC016 M04/M07 A2928 RMK AO2 PK WND 32044/0129 SLP927 P0000 T10441072 TSNO= KMPO 150253Z AUTO 32024G36KT 1/2SM SN FZFG FEW006 OVC016 M05/M07 A2927 RMK AO2 PK WND 32039/0216 SLP925 P0000 60000 T10501072 50004 TSNO= KMPO 150353Z AUTO 33020G34KT 9SM OVC011 M05/M08 A2928 RMK AO2 PK WND 32046/0256 UPB47E51SNE47 SLP929 P0000 T10501083 TSNO=
show that winds during the period of significant snow accumulation were in the 20-26 kt (23 to 30 mph) range sustained with gusts up to 44 kt (51 mph). This (obviously) causes snow to fill in depressions, and it doesn't accumulate well on flat surfaces. Thus holes a foot or more deep were filled, drifts of a half foot or more were against walls, and most open areas had about a half inch of snow with spots nearly bare when all was done - the top layer of all being crusty from the wind packing it down.
I collect snow in a coffee can as described in my data page. There can be problems with snow entering the can and trees can hinder it doing so in strong winds - but snow can also be picked up and deposited in. Without knowing the relative magnitudes of those effects, I decided to simply use the total collected, which was .119 inches of liquid equivalent at midnight mean solar time January 15. I obtained a representative snow:water ratio from a drift of 2-3 inches which was rather flat on top - slid a flat surface under the drift, measured the depth on top of it as 2.2 inches, placed a coffee can over it, flipped it over so the snow fell into the can, melted the snow, and measured the liquid equivalent - obtaining an amount of .237 inches. Thus the snow:water ratio in the drift was 2.2/.237 = 9.3:1 - a value which I find is typical for wind-driven snow which is usually light falling from the sky but the wind packs down on the ground. Using those numbers, the average snow depth was calculated as (.119)(9.3) = 1.1 inches.
I place this here because some people tend to assume I am making numbers up, while I am
actually meticulous about my readings - so without further knowledge they should assume the
opposite.