12-5-2002 STORM (The Earliest December Snow)
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Obs. Num. Time of Obs.
12-05-2002
Total Frozen Precip. Inches Total Melted Precip. Inches Temp. F Remarks for the Time Period
   0      0019 hrs.    0.0   0.00   28.9   Snow started at 0019 and is extremely light intensity - - Relative Humidity 54% now!
   1      0119 hrs.    0.1   Trace   27.4   Ground and street getting white ---snow crystals are broken and irregular very few single crystals -- Relative Humidity now 74% -- Rate now light steady snow
   2      0219 hrs.    0.5   0.04   25.8   Moderate snow now -- Relative Humidity 84% - - snow crystals show light riming many are broken and irregular
   3      0319 hrs.    1.2   0.11   25.6   Moderate steady snow - Barometer fall rate now 0.05 inches in one hour - Relative Humidity 87%
   4      0419 hrs.    1.6   0.17   25.5   Light to Moderate snow - Barometer fall rate now 0.06 inches in one hour - - snow crystals show light riming in small aggregates of broken and irregular particles - Relative Humidity & temperature now steady
   5      0519 hrs.    2.0   0.22   25.4   Light snow - Barometer fall rate now 0.04 inches in one hour
   6      0619 hrs.    2.6   0.30   25.1   Moderate snow - Barometer fall rate now 0.03 inches in one hour
   7      0719 hrs.    3.3   0.38   25.3   Moderate snow - Barometer fall rate now 0.03 inches in one hour- - snow crystals show riming and very few show single crystals
   8      0819 hrs.    3.7   0.48   25.5   Light to Moderate snow - Barometer fall rate now 0.02 inches in one hour- -
   9      0919 hrs.    4.5   0.61   26.0   Moderate snow - Snowfall rate increasing and snow crystals show moderate riming in small aggregates that bounce some on impact (graupel like)
  10    1019 hrs.    4.9   0.69   26.0   Light to Moderate snow - Barometer fall rate now 0.04 inches in one hour but the back edge of snow is near the Prince William County line
  11    1055 hrs.    5.0   0.74   26.4   Snow stopped about ten minutes ago and we now have a very light freezing drizzle
  12    1205 hrs.    5.0   075   26.8   Freezing rain and sleet until 1205 then a snow shower again -- Accumulation equaled the settling of the snow
  13    1245 hrs.    5.0   0.77   27.8   More snow showers and some sleet but accumulation still equaled the settling of the snow
  14    1315 hrs.    5.0   0.78   28.1   End of Precipitation