SR/SSD 99-12

4-1-99

Technical Attachment

VISIT Satellite Teletraining, April 1999

Scientific Services Division

NWS Southern Region Headquarters

The NWS/NESDIS Virtual Institute for Satellite Integration Training (VISIT) will be offering teletraining session on three topics during the month of April, 1999. Offices can register for one or more of these session by visiting the Integrated Sensor Training Profession Development Series (ISTPDS) Web page at: www.cira.colostate.edu/ramm/visit/ecal.asp.

The training sessions will be approximately one hour long and will require a fast PC with at least 64 mb of memory and a network connection. Note that although the Pentium PDWs will probably suffice for the teletraining, the VISIT sessions will not use the Optel system, so they do not require the PDW. The files for each session will be downloaded prior to the training and are easily installed with a self-extracting executable file on a windows PC. Further instructions will be provided to participants. The VISIT is offering these sessions at a relevant, but albeit busy time of the year, so it is possible on-going weather may preempt participation by affected offices. The topics to be covered in the training sessions are described below.

Detecting Low-Level Thunderstorm Outflow (LTO) Boundaries at Night Using GOES Imagery.

This case reviews the use of the GOES imager channels to detect and monitor the evolution of LTO boundaries at night. These LTO boundaries have been monitored for years using the high resolution visible channel during the day. With the advent of the 3.9 micron channel on the GOES-8, -9 and -10 imager instrument, it is now possible to use the fog/stratus product to monitor the LTO boundaries during the night. The goal of this teletraining session is to review the use of the various GOES IR channels and products in monitoring LTO boundaries at night.

Prerequisites: Prior to participating in this teletraining session students should review the following materials:

CIRA 3.9 micrometer tutorial section on fog/stratus

(www.cira.colostate.edu/ramm/goes39/imgapps.htm).

COMET SatMet1 CD-ROM module - Chapter 6 - Section 4

which deals with the GOES 3.9 micrometer channel.

The Enhanced-V: A Satellite Severe Weather Signature.

The goal of this lesson is to review the correct identification and interpretation of the Enhanced-V signature using GOES IR data. The session is based on an outbreak of strong convection which occurred on March 29, 1998, across southern Minnesota and central Wisconsin. These storms produced several tornadoes, most notably at Lismore/Wilmont/Leota (F2) in southwestern Minnesota, at Comfrey/Hanska/Courtland (F3/F4, with one fatality), and at Nicollet/St. Peter/Le Center (F3, with one fatality) in south-central Minnesota. This event marked one of only seven occurrences of tornadoes in Minnesota during the month of March. A tornado was also reported near Maxville, Wisconsin. In addition, large hail was reported with these particular storms (hailstone diameters up to 4.5 inches in Minnesota and 1.75 inches in Wisconsin).

Prerequisites: None

GOES Enhancement Color Tables in AWIPS.

This presentation will explore the use of the GOES imager data and ways of displaying GOES imagery and products in the AWIPS environment. The suggested default color tables are displayed and explained. The goal of this training session is to teach the participants how to modify/enhance AWIPS satellite imagery for specific applications/features.

Prerequisites: Prior to the teletraining, students should review the following materials.

CIRA Advanced GOES Imagery Tutorial: Enhancement Tables

(www.cira.colostate.edu/ramm/advimgry/enhance0.htm).

CIMSS Winter Weather Tutorial: Enhancement Tables

(cimss.ssec.wisc.edu/goes/misc/visit/enhancement.html).