Using GOES Rapid Scan Operations (RSO) Imagery in AWIPS
Introduction:
This session will focus on how to obtain GOES RSO data and utilize it in AWIPS to assist with the forecast decision making process.
The objectives of this training session are:
- Describe the GOES RSO capability
- Explain the procedure for requesting RSO imagery
- Identify conditions for calling a RSO
- Use RSO effectively
Training Session Options:
VISITview playback without Audio – You may step through the VISITview file on your own to view the presentation. If talking points are available, you may use these in tandem with going through the slides.
Create a directory to download the playback file from the following site: http://rammb.cira.colostate.edu/training/visit/training_sessions/using_goes_rapid_scan_operations_rso_imagery_in_awips/using_goes_rapid_scan_operations_rso_imagery_in_awips.exe After extracting the files into that directory click on the visitlocal.bat file to start the lesson. Advance slides on your own using the navigation controls (i.e., the Next button will advance to the next slide)
Talking Points:
| Page | Title | Comments |
| 1 | Using GOES RSO in AWIPS | Welcome-Introduction-Credits |
| 2 | Why ? | Motivation for the training. AWIPS GOES imagery actually gets there in ~8 minutes in RSO….fastest ever. |
| 3 | Objectives | Ask each office if they’ve ever called a RSO session. Some offices thought RSO was only for severe convective weather. |
| 4 | Benefits | Prestorm & warning environments…. May 3rd (’99) – forecasters looking at each sat image for initiation…but forgot to call RSO. |
| 5 | Importance of RSO | “There are some significant meteorological events that occur on timescales less than 10 minutes.” |
| 6 | GOES-East Routine Mode | Covers larger satellite sector domains than RSO. |
| 7 | GOES-East Actual Routine Sectors | |
| 8 | GOES-East Rapid Scan Mode | Showtext link goes to NOAASIS page – GOES Dissemination Schedule. |
| 9 | GOES-West Routine Mode | Note the schedule offset from GOES-East. |
| 10 | GOES-West Actual Routine Sectors | |
| 11 | GOES-West Rapid Scan Mode | Link goes to NOAASIS page – GOES Dissemination Schedule. |
| 12 | GOES-East Volcano Sector | Monitor ash clouds as aviation hazards. |
| 13 | GOES-West Hawaii RSO Sector | Alaska RSO sector is also available. |
| 14 | RSO POCs | Plan to autotrigger under review at NCEP. One impact of calling RSO is the 00Z winds model assimilation. |
| 15 | GOES RSO Start Times | RSO request- time until activation and start times of each satellite. |
| 16 | RSO Delivery Times | How long does it take the RSO imagery to get to your AWIPS and get displayed? Mention GOES image time is when the first line begins scanning |
| 17 | RSO and other WFOs | All offices ingesting data from a particular GOES get RSO when it is called for that satellite. More images means shorter loop sequences unless the number of frames are increased. Link goes to VISIT GOES FAQ page |
| 18 | AWIPS and RSO | This directory on AWIPS tells you which satellite is selected as your primary GOES ingest. Ask any offices that could use either if they know which one is selected. |
| 19 | AWIPS RSO Products | AWIPS Satellite products are available for CONUS and smaller domains in RSO. |
| 20 | AWIPS RSO Derived Products | Locally derived satellite products (eg. fog product) also available in RSO |
| 21 | Mesoscale changes with Synoptic Systems | RSO Applications |
| 22 | Departing Nor’easter IR-radar 25 Feb 99 | Place arrow initially on the southern coast of Massachusetts. Snow dissipation along the western edge evident on IR imagery before radar. What features can you see ?A) Satellite imagery shows warming cloud top temperatures before dissipation is evident in the radar reflectivity B) Deformation ZoneC) Dissipation of snow in western half of region.D) Satellite shows warming cloud tops as precipitation is ending. E) Satellite offers extension of databeyond radar range. F) Low-level convection- SE NY/SW CT snow band. |
| 23 | Hurricane Bret | Hurricane Bret Loop showing mature storm with well-developed eye while still over water. RSO called by SR HQ showed initial stages of eye formation (from Ken Waters). |
| 24 | Mesoscale RSO Applications | Some phenomena that can be seen. Others ? |
| 25 | 4-panel Great Lakes 14 Nov 95 | Point out use of other channels, use more than just visible imagery (especially at night…switch to fog/stratus product). LES regional scale images are non-RSO. |
| 26 | RSO Great Lakes Visible 14 Nov 95 | Lake-effect case that shows better continuity of features. 1) E. Huron Snowbands2) IN/OH Cu/snow3) Cloud field develops downwind of snow field4) Favorable shear profile over Lake Huron for multiple bands5) Mesoscale lows over the lakes6) Snowcover in WI7) Clouds over snowInfer shear by snowband type:Single Band: < 30° of directional shear from the BL to 700mbMultiple Bands: 30-60° of directional shear from the BL to 700 mbNote – Greater than 60° of directional shear from the BL to 700 mb is detrimental for lake-effect snowband development Cloud field develops beyond snow cover. Meso-low features over Lakes Superior and Michigan; radars seldom detect these shallow features. |
| 27 | 15-minute Visible – 8 April 1998 | 15- minute loop. Ask for description of features.A) Boundary in N. ALB) Regional scale cloud cover(SE)/clear (NW)C) Organized convective linesD) Developing squall line NE MSE) Splitting storm NW GAF) Changes in Cu growth/coverageG) Boundaries and their motions |
| 28 | RSO Southeast Loop – 8 April 1998 | Point out northward moving boundary that played a key role in the Birmingham tornado. Boundary also seen on radar, BHM prepared for this. Noted that F5 started as boundary interacted with existing tornadic storm. |
| 29 | IR Southeast Loop – 8 Apr 98 | RSO IR imagery for 8 April 1998 tornado case. Show usefullness of IR imagery (Enhanced-V signature), keep the RSO going well into the night if conditions warrant. (Refer to Enhanced-V training) Ask if the Enhanced-V can be seen and what it’s implications are. |
| 30 | Fade of Visible and IR4 – 8 Apr 98 | Show usefulness in AWIPS of being able to combine satellite imagery (also useful for radar). Show fader – fade, animate, rock. Examine appearance of boundary and cloud features in VIS and 10.7 um IR. |
| 31 | Fade of Visible and IR2 – 8 Apr 98 | This is the VIS/3.9um fader. Notice the similarities and detail in the lower (warmer) clouds. 3.9um is not affected by the water vapor attenuation at 10.7 um. |
| 32 | Fade of the IR2 and IR4 8 Apr 98 | Use IR imagery at night to follow severe t-storms. Can see low cloud information with enhanced IR imagery or derived products.IR-Cloud topsIR2/Fog-stratus- shows low clouds verus surface better than IR (10.7um) |
| 33 | 17 May 1996 1km Visible Imagery | Nebraska – dryline boundary with wave near location of storm initiation. 1) Draw CF from NE NE-Central NE2) Possibility of a wave near Hastings |
| 34 | 17 May 1996Initiation on Satellite and Radar Boundaries | 17 May 1996 case, Grand Island, Nebraska radar with remapped 1km visible imagery (AWIPS-like). Visible imagery shows the first boundary to the east is not as important as it may appear on radar alone, deeper clouds on the western line. Note “extension of radar-range information” in east boundary with more clouds to the south.A) These are 2 boundaries- not one (versus previous loop)B) There is not a wave on the CF (initially)C) Eastern-most boundary looks most intense on radar- but satellite shows no cloudsD) Radar/satellite shows splitting storm E) Use radar and satellite to compensate for the “cone of silence” |
| 35 | Stormscale Applications | |
| 36 | 17 May 1996 – Storm Splitting | 17 May 1996 case. Are 2 different overshooting tops observable ? Storm splitting is evident on visible imagery before radar reflectivity. 18 minutes before upper-level scan and 10 minutes before mid-level scan. These details evolve in short time frames. |
| 37 | 31 May 1996 RSO and SRSO | 1) CO storm forms on Palmer Lake Divide and moves SE toward a convergence line. (Refer to LTO session for outflow boundary evolution)2) Point out how quickly outflow/RFD develops from the supercell in eastern CO. 3) Orphan anvil travelling north dissipates. (Apparently due to storm-scale subsidence)4) Point out other storm’s outflow interaction N ans E of CO storm. Low cloud feature SE of CO storm at 224514 is associated with a 70kt storm outflow according to storm data.5) Convergence of low cloud and flanking line results in F2 tornado within 5 minutes after the interaction (storm chase video). 6) Also note structure of overshooting tops – qualitative assessment of divergence and back building anvils. 7) Explain SRSO- can show important storm-scale features. |
| 38 | Miscellaneous uses of RSO | |
| 39 | GOES Assessment Convective Initiation Feedback | 29 March 1998 case. Development of a storm in Iowa along some boundary that moved into La Crosse CWA. Feeder bands in northeast Iowa with that storm. More stable stratiform region further north in Wisconsin. Watch for storms in the moist sector where more Cu is present. |
| 40 | ARX RSO Visible Loop | 1) Draw WF, CF, Low, and DL2) Eastern IA MCS forms- moves NE. SW view of storm shows “feeder bands” -a possible severe weather indicator.MCS moved across WF and storms dissipate. Imagery shows warm front position and weakening of feeder bands.3) Warm-sector does not have homogeneous cloud cover4) Storms initiate over Council Bluffs, IA- then move into deeper moisture and develop further.5) Triple-point storm initiation |
| 41 | G/A RSO Use After Initiation | |
| 42 | Case study- RSO in Warning Decision Making | Link goes to the Cheyenne case, RSO used in warning decision making. |
| 43 | Other examples of using GOES RSO by WFOs | Link goes to Western Region RSO GOES Assessment – shows many examples. |
| 44 | 2 September 98 Los Angeles radar | Note thunderstorms along the higher terrain east of LA. A boundary extends from the storms on the high terrain towards Los Angeles. Later in the loop the storms develop near LA, the storms made the radars go down just after 22:30 UTC |
| 45 | 2 September 98 IR | Thunderstorms developed on the high terrain initially, then dissipated as new storms developed in the Los Angeles area. |
| 46 | 2 September 98 IR and Visible imagery | After the initial activity southeast of LA weakens, new storms develop northwest of the city and form an outflow on their southeast flank (see arc cloud line in vis imagery). The storms are most intense near the intersecting boundaries on the north end of the arc cloud line. The WSR-88D’s went down during this time due to severe weather. An RSO was called DURING the event (and started after 00Z). Calling an RSO before the event would’ve showed the new thunderstorm development over Los Angeles associated with intersecting boundaries with better continuity while the radars were down. |
| 47 | 2 September 98 Los Angeles radar | Radar imagery after it came back online (the severe weather caused an outage). By the time the radar is back up the storms are weakening as they move towards the ocean. |
| 48 | GOES Assessment Feedback | |
| 49 | RSO Conclusions I | |
| 50 | RSO Conclusions II | Link goes to RSO student guide on VISIT homepage |
| 51 | On-station Training Exercise | |
| 52 | About SRSO and AWIPS | |
| 53 | Shows why not to view RSO imagery on the CONUS scale |
This course is Basic
This Course has no Prerequisites
Contact:
Dan Bikos
Dan.Bikos@colostate.edu