SNOW OBSERVATIONS
 
WEST HENRICO GLEN ALLEN
SNOWFALL FOR 2011 - 2012
WINTER'S TOTAL     7.4 inches
BACK TO CURRENT SNOW TABLE SNOWS OF PAST WINTERS

Days
Snow
Month
Snow
Day
Total
Snow
Inches

Rating
Hourly
Chart
Time
Lapse
Movie
Remarks
Days with any measurable snow during the winter
Rating = Snowstorms must be greater than 1 inch of snow.
 1  Oct.   29   T   Event 1  No   A little sleet mixed in with the rain but was hardly discernible.
 2  Jan.   20  T   Event 2  Yes   Hard period of sleet around 2200 hrs. and then went back to rain and freezing rain. After midnight on the 21st it was light freezing rain until about 0700 then the temperature went above freezing. The max. ice accumulation was a little less than 0.1 inches.
 3  Feb.  11  0.5  Event 3  Yes   This was the first snow event of the winter a Thunder Snow Squall which was a 40 minute event. Thunder occurred at 1525 and 1526 and at 1528 during a snow squall. There was about a 3 to 5 minute period of snow pellets between 1506 and 1510. Heaviest snow was from 1525 to 1533 but some snow was melting as it fell as the temperature was above freezing during the even which started at 1505 and ended at 1545. The low temperature during the snow was 34 F and as soon as it was over it rose to 35 before falling again.
 4  Feb.  19
20
 5.2  Storm 1  Yes  Precipitation started as Snow at 1112 but was forecast to start as rain. From the start until 1800 it looked like the forecast amount would be higher than it should be. You could see on radar that heavier snow was on the way to the West Glen Allen station but when it arrived I was surprised by its intensity. From 1900 to 2000 hours the West Henrico Co. - Glen Allen area added 2.5 inches to the total snowfall. This was what made our snow total one of the highest in Henrico County. I saw a snow total of 6.5 inches in Louisa County to our west. The fact the West Henrico Co. - Glen Allen Station is so far west in Henrico put us in the heavy snow band that also apparently affected Louisa County. The Richmond International Airport reported only 3.9 inches of snow. Two core samples were taken and both agreed within 0.02 inches of amount of liquid equivalent. They both were about 0.05 inches more than the HEATED tripping bucket gauge and this amount was added to the tripping bucket amount to account for what was probably evaporation due to the heating.
 5  Mar.  5  1.7  Storm 2  Yes   Precipitation started as snow at 0615 about 2 hours after the predicted start time. The snow started very light with small flakes but soon became large fluffy aggregate crystals of flakes trapping air and give a radio of about 18 to 1. The main accumulation was between 0700 and 0800 with one inch of snow during the hour but it was still too warm to stick on the street. At 1000 the accumulation was 1.7 inches before passing through a dry slot and getting into the backside of the clipper. The snow had melted off to 1.4 inches before the wrap-around effect gave 0.3 inches even with melting going on. The accumulation then went back to 1.7 inches before ending. There was a snow shower or heavy snow flurry around 1600 to 1608 but it melted as it fell as it was 40 F at the time of the snow shower. The sun came out and by sunset only a trace of snow remained on the yard. The final snow to water ratio was 8.5 to 1 due to the melting. The total amount of liquid was 0.20 inches.
Total= 7.4 Inches

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