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Snow Totals For: November 20, 2019

DelDOT
Maintenance
Area
Location
Last Update
(minutes ago)
Snow Storm Total
(in)
12
Talley
50.0
12
Claymont
50.0
12
Greenville
50.0
11
Prices Corner
50.0
11
White Clay Creek
50.0
11
Hockessin
50.0
10
Newark
50.0
10
Glasgow
50.0
10
New Castle
50.0
9
Blackbird
50.0
9
Port Penn
50.0
8
West Dover
150.0
8
Smyrna
50.0
7
Woodside
50.0
7
Dover
50.0
6
Frederica
50.0
6
Harrington
50.0
5
Dagsboro
50.0
5
Bethany Beach
50.0
4
Stockley
50.0
4
Nassau
50.0
3
Ellendale
50.0
3
Lewes
50.0
2
Seaford
100.0
2
Bridgeville
50.0
1
Laurel
50.0

Notes:

  • Locations in bold represent highest storm total for each maintenance area.
  • Click on a maintenance area within the map to highlight the corresponding stations inside the table.
  • Hover over a station within the map to display the name and maintenance area.
  • Stations update every 5 minutes
  • Trace (Tr) represents snow was detected by the sensor, but it was less than the accuracy of the sensor, which is approximately 0.4 inches (1.0 centimeter)

Event Archive:

2009 (1)

2010 (4)

2011 (11)

2012 (4)

2013 (15)

2014 (15)

2015 (15)

2016 (9)

2017 (11)

2018 (10)

2019 (9)

About the DEOS Snow Monitoring System

Real-time snow depth measurements are provided by the Delaware Environmental Observing System (DEOS) to the State of Delaware through funding from the Delaware Department of Transportation (DelDOT) for the Snow Removal Reimbursement Program. Snow measurements are now being taken over official National Weather Service snowboards. The snow monitoring stations directly measure snow depth, which is processed every five minutes to produce snow accumulation data.


DEOS Snow Monitoring Station

Snow depth is measured using a sonic ranging depth sensor, which is shown in the image to the above. This sensor sends a sonic (sound) signal from its base to the surface below. This signal is then reflected from the surface to the sensor where an air temperature-calibrated distance-to-surface measurement is calculated. This distance is then subtracted from the initial height of the sensor above the ground to yield a snow depth measurement. The accuracy of this sensor is +/- 1 cm (approximately 0.3937 in.). Each snow depth measurement undergoes a quality control procedure that checks for instrumentation error and data integrity according to the manufacturer's recommendations.

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