260-2510 Standard Rain and Snow Gauge

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Precipitation 260-2510 Standard Rain and Snow Gauge The 260-2510 Standard Rain and Snow Gauge is a National Weather Service type all-aluminum rain gauge with a total capacity of 20" of rainfall. The gauge includes a funnel, measuring tube, overflow can and measuring stick with English and metric markings. The tripod support is sold separately. The upper portion of the funnel is cylindrical in shape and is turned to a fine edge. Rainwater falling into the funnel is delivered into a measuring tube. The cross- section area of the tube is one-tenth the cross-section area of the funnel. Therefore, when 1 inch of rain falls into the funnel, it fills the measuring tube to a depth of 10 inches. The scale on the measuring stick is expanded 10 times, and since the scale is graduated to hundredths of an inch, the correct rainfall depth of water in the tube is read directly to hundredths from the stick. The capacity of the measuring tube is 2" of rainfall. Any excess overflows into the outer chamber. The overflow water must be transferred to the empty measuring tube for direct measurement with the stick. In winter, the funnel and measuring tube are removed so that rain/sleet/snow/hail are collected by the outer chamber. The amount of precipitation is measured by melting the ice and then pouring the water into the measuring tube. 260-2510 Rain Gauge Features with 260-2510S Tripod National Weather Service Type Rain and Snow Gauge Total capacity 20 inches (500 mm) English / metric measuring stick included Optional tripod support stand Specifications Orifice 8" (200 mm) Capacity 20" (500 mm) Resolution 0.01" or 0.2 mm Construction White powder coated aluminum body, anodized aluminum funnel Dimensions 8.25" diameter x 24.75" height (210 x 630 mm) Weight / Shipping (gauge) 7 lbs / 8 lbs ( 3.2 kg / 3.6 kg) Weight / Shipping (tripod) 8 lbs / 10 lbs (3.6 kg / 4.5 kg) Ordering Information 260-2510 Standard Rain and Snow Gauge with Measuring Stick 260-2510S Tripod Support 260-2510MS English/metric Measuring Stick (24" length) NovaLynx Corporation PO Box 240 Grass Valley CA 95945 www.novalynx.com DOC 260-2510 DS 20210630 +1 (530) 823-7185 [email protected] .

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Snow Nowcasting Using a Real-Time Correlation of Radar Reflectivity
20 JOURNAL OF APPLIED METEOROLOGY VOLUME 42 Snow Nowcasting Using a Real-Time Correlation of Radar Re¯ectivity with Snow Gauge Accumulation ROY RASMUSSEN AND MICHAEL DIXON National Center for Atmospheric Research, Boulder, Colorado STEVE VASILOFF National Severe Storms Laboratory, Norman, Oklahoma FRANK HAGE,SHELLY KNIGHT,J.VIVEKANANDAN, AND MEI XU National Center for Atmospheric Research, Boulder, Colorado (Manuscript received 21 November 2001, in ®nal form 13 June 2002) ABSTRACT This paper describes and evaluates an algorithm for nowcasting snow water equivalent (SWE) at a point on the surface based on a real-time correlation of equivalent radar re¯ectivity (Ze) with snow gauge rate (S). It is shown from both theory and previous results that Ze±S relationships vary signi®cantly during a storm and from storm to storm, requiring a real-time correlation of Ze and S. A key element of the algorithm is taking into account snow drift and distance of the radar volume from the snow gauge. The algorithm was applied to a number of New York City snowstorms and was shown to have skill in nowcasting SWE out to at least 1 h when compared with persistence. The algorithm is currently being used in a real-time winter weather nowcasting system, called Weather Support to Deicing Decision Making (WSDDM), to improve decision making regarding the deicing of aircraft and runway clearing. The algorithm can also be used to provide a real-time Z±S relationship for Weather Surveillance Radar-1988 Doppler (WSR-88D) if a well-shielded snow gauge is available to measure real-time SWE rate and appropriate range corrections are made.
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A Study on Snow Density Variations at Different Elevations
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