NOAA/National Weather Service's Warning Decision Training BranchUnited States Department of Commerce

The RPS List Decision Aid for AWIPS 17.1.1

The guidance provided here has been updated for the 17.1.1 release of AWIPS.

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Warning Decision Training Division

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Overview

Both clear air mode VCPs can have the same RPS list, since they contain the same elevation angles. Rainfall and snowfall estimation products are suggested since these VCPs may be most appropriate for light precipitation events. Otherwise, the rest of the suggested products are typical of clear air conditions and very light, non-convective precipitation events. You could always produce 2 clear-air RPS lists, one for warm season (no snow expected) and another for cool season, but it certainly doesn't hurt leaving the snowfall products on there, even during the warm season. Since snow accumulation never automatically resets, leaving the snow products in the list would allow you to easily determine the last time accumulation was manually reset without going to the RPG. It's at least something to think about.

Products NOT included: Anything unrelated to very light non-convective precipitation or snowfall. This encompasses a wide range of products. If additional products are required for a particular event, chances are you should switch to one of the precipitation VCPs.

The following RPS list contains 25 products and covers just about anything you might have a need for in a clear air mode VCP, and combined with the national list is a total of 99 products.

Sample VCP 31/32 Local RPS List

 

 
ID
Code
Elevation Angles
Product Description
Reason to Include
33
HSR
Hybrid Scan Product
16 Level, 1 km (0.54 nm) Hybrid Scan Reflectivity
Consistency check to see what's getting into precip products, especially snowfall
79
THP
Hybrid Scan Product
16 Level, 1 km (0.54 nm) Surface Rainfall Accumulation, 3 Hour Duration Longer duration product .
99
DV
4.3
256 Level 1.0 km (0.54 nm) Base Velocity
No substitute for 8-bit base data products, especially for the proper interpretation of deep, moist convection.
144
OSW
Hybrid Scan Product
16 Level, 1 km (0.54 nm) One-hour Snow Accumulation (Water Equivalent)
Clear air VCPs can detect and resolve snow quite well
145
OSD
Hybrid Scan Product
16 Level, 1 km (0.54 nm) One-hour Snow Accumulation (Depth)
Clear air VCPs can detect and resolve snow quite well
146
SSW
Hybrid Scan Product
16 Level, 1 km (0.54 nm) Storm Total Snow Accumulation (Water Equivalent)
Clear air VCPs can detect and resolve snow quite well
147
SSD
Hybrid Scan Product
16 Level, 1 km (0.54 nm) Storm Total Snow Accumulation (Depth)
Clear air VCPs can detect and resolve snow quite well
153
HZ
0.5, 1.5, 2.4, 3.4, 4.3
Super Resolution Reflectivity You want the highest resolution base data you can get during severe weather operations.
154
HV
0.5, 1.5, 2.4
Super Resolution Velocity You want the highest resolution base data you can get during severe weather operations.
155
SW
0.5, 1.5, 2.4, 3.4, 4.3
Super Resolution Spectrum Width You want the highest resolution base data you can get during severe weather operations.
159
ZDR
4.3
256 Level, 0.25 km (0.13 nm) Differential Reflectivity Supplements the dual-pol base data from the national RPS list.
161
CC
4.3
256 Level, 0.25 km (0.13 nm) Correlation Coefficient Supplements the dual-pol base data from the national RPS list.
163
KDP
4.3
256 Level 0.25 km (0.13 nm) Specific Differential Phase Supplements the dual-pol base data from the national RPS list.
165
HC
4.3
256 Level 0.25 km (0.13 nm) Hydrometeor Classification

Supplements the dual-pol products from the national RPS list.

166
ML
4.3
Melting Layer (Graphic Output) Supplements the dual-pol products from the national RPS list.