Gridded NUCAPS Overview

SPoRT has been part of a collaborative effort within the Joint Polar Satellite System (JPSS) Proving Ground Sounding Initiative* to provide plan-view and cross-section displays of CrIS/ATMS (Cross-track Infrared Sounder/Advanced Technology Microwave Sounder) temperature and moisture soundings in AWIPS (i.e., Gridded NUCAPS).  Currently, NWS offices receive NUCAPS Soundings through the Satellite Broadcast Network (SBN) and Gridded NUCAPS is the capability to process and view these data horizontally and vertically.  Gridded NUCAPS was originally developed to diagnose Cold Air Aloft (CAA) but can also be used to diagnose the pre-convective environment. Gridded NUCAPS has been evaluated at the Anchorage CWSU for the CAA forecasting challenge and at the Hazardous Weather Testbed for assessing the pre-convective environment. As part of the JPSS Sounding Initiative, the team of collaborators is exploring new applications for Gridded NUCAPS and working with developers to baseline the product in AWIPS.  Gridded NUCAPS is expected to be released in AWIPS build 19.2.1. This Vlab site provides resources and tools to help NWS forecasters learn about and use Gridded NUCAPS in AWIPS.  

Gridded NUCAPS is a follow-on product to the NUCAPS Sounding described in this prior lesson (link).  Instead of a single profile view, the NUCAPS sounding data for all points along a pressure level or within a layer are used to create plan view displays of temperature-and moisture-based fields.

*including NOAA NWS, Science and Technology Corporation, the Cooperative Institute for Research of the Atmosphere, Geographic Information Network of Alaska, and Space Science Engineering Center/Cooperative Institute for Meteorological Satellite Studies 

How to Load Gridded NUCAPS

Satellite Menu

In CAVE:  Satellite → S-NPP and NOAA-20 → Gridded NUCAPS

Volume Browser

In CAVE:  Volume → Browser

In the Volume Browser window, under the Sources section: Volume → GriddedNUCAPS, then select the desired data under the Fields and Planes sections. 


Available Parameters

Level/Layer Products

  • Temperature
  • Dewpoint Temperature
  • Dewpoint Depression
  • Relative Humidity
  • Lapse Rate
  • Theta E
  • Theta-E Lapse Rate
  • Precipitable Water

Single Level Products

  • 2m Temperature / RH
  • Total Column Ozone'
  • Ozone Anomaly
  • Tropopause Level
  • Haines Index
  • Quality Control

Important: See more information about each of the products, including links to suggested color maps and regional-specific information about the Haines Index.

Setting Purge Rules

You can change the Purge Rules in AWIPS to retain more passes of the gridded NUCAPS data.  in order to do this, take the following steps...

  1. Open the Localization perspective in AWIPS
  2. Go to EDEX -> Purge Rules
  3. Find the gridPurgeRules.xml file and copy the BASE file to SITE level (unless you already have a SITE file)
  4. Add the code below somewhere in the file, but between the purgeRuleSet start and end tags.  Note: the 3 in the code below is just an example, and will save data for 3 days in this case.  Set the purge rules to retain data per your local office needs. 
  5. Save the file and restart EDEX





Training / References

Gridded NUCAPS Quick Guide

Gridded NUCAPS - Analysis of the Pre-Convective Environment (~15 min module)