2 CASA Motivation NEXRAD coverage at 3 km (10,000 ft) AGL. While radar beam travels essentially straight lines, the earth is curving down and away, leaving a low-altitude coverage gap.NEXRAD coverage at 1 km (~3200 ft) AGL.
4 CASA’s Solutionsnowwindtornadoearth surface4080120160200240RANGE (km)Dense networks of low power, dual pol, multi-Doppler, X-band radarsHigh spatial and temporal resolutionAdaptive scans based on weather, user needs and radar capabilities
5 What is CASA? National Science Foundation Engineering Research Center Academic, Government and Private Sector PartnersNOAA is a CASA partnerDeveloping new weather observation systems based on low-power, low-cost networks of radars.Transition research to operations.Year 8 of a 10-year research project
6 Comprehensive radar data in the lower atmosphere Purpose: Establish a radar network in the Dallas-Fort Worth area using CASA technology.Comprehensive radar data in the lower atmosphereFaster radar return rateHigher resolutionFlood and Wind (thunderstorm, tornado) forecastsFlood and Wind decision support toolsBase level radar dataPublic/Private Partnership
7 NEXRAD = 5 min between updates CASA = 1 min between updatesRapid, High Res. “smart” scansbalance competing user needs for dataadapt to changing weatherRHIs, PPIs, dual Doppler, sector scans, within a volume scanImproved resolution, sensitivity, accuracy, and ability to support multiple users and multiple applications.
8 Collaborative Adaptive Scanning Meteorological Command and Control Full explanationMay 14, 2009 Anadarko Tornado
9 Improve Forecaster/EM/Spotter Decisions EM CommunicatorCASA on AWIPSCASA on WDSS-iiNWSForecasterNWS ChatTwitterEMs in Mobile EOCCASA/WXscopeSpottersEM in EOC
10 Steering Committee City of Dallas City of DeSoto City of Fort Worth City of GrapevineCity of McKinneyCity of MidlothianCity of North Richland HillsCity of SeagovilleCollin CountyDenton CountyDFW AirportJohnson CountyTarrant CountyNational Weather ServiceNorth Central Texas Trauma Regional Advisory CouncilNorth Central Texas Council of Governments
11 Timeline May 2011 NCTCOG Approves Feasibility MOU with CASA June 2011 CASA WX Steering CommitteeAugust 2011 CASA WX Funding SubcommitteeSeptember 2011 NWS Funds $500K toward DFW Testbed Demonstration Projects
12 Timeline ContinuesOctober 2011 Commence relocation of Oklahoma test bed to DFW areaNovember 2011 Finalize initial sitesFebruary 2012 Complete installation of initial four radar networkMarch 2012 Demonstration network operationalJune 2012 Finalize second round of radar sitesOctober 2012 Complete installation of second round of radars
14 Metro Area - This is the recommend placement of the first four sites. Late winter 2012 – First 4 radarsSummer 2012 – next 2 radarsFall 2012 – Next radarWinter – 2013 CSUThe sites include UNT and UTA buildings, which have the best connectivity so far from all proposed sites and the FAA building, which is presumed to have good network access too.Covers the metroplex with very high resolution data,Covers the gap above the NEXRAD radar in Fort Worth.The north south orientation will capture storms coming from the northwest and into the metroplex, while the existing NEXRAD can give warning for storms coming from the southwest.Provides unprecdented low level coverage of the trinity river for flooding, and accurate precipitation estimates.Also provide coverage of rivers, lakes to the north which impacts precipitation estimates.Very fast updates (1 Min) for rapidly evolving severe weather in the Metroplex.Disadvantages:CASA will provide very low coverage, but some coverage provided by NEXRAD.This system will focus more on real time data vs. forecasts.Which airports are we covering in addition to DFW and Love Field.FIRST FOUR SITES:Site 7: UNT Discovery Park, DentonSite 3: Alliance Airport, FAA buildingSite 11: University of Texas, ArlingtonSite 2: TBD – Carrollton, near G. Bush Tpk. And Kelly BlvdBlue – submitted sitesGreen, Yellow : new sites14
15 Site 5: Terrell Municipal Airport Site 9: Mesquite Metro Airport Northeast Expansion - This configuration continues coverage over highly populated areas and gets into areas where there is more of a radar gap.NEXT FOUR SITESSite 5: Terrell Municipal AirportSite 9: Mesquite Metro AirportSite 13: McKinney Public Safety BuildingSite 3: TBD - Near Farm to Market Rd and County Rd. 53615
16 Option #1: Expand to South West as one continuous network Southwest Expansion. After the first eight radars, we could expand into the southwest which would provide more high resolution nowcasts and forecasts in the metroplex..We could also consider going to the south west before going to the northeast. We do not have any site identified in this area.Option #1: Expand to South West as one continuous networkTOTAL NETWORK SIZE = 12 RADARS16
17 Option #2: Expand to SW as two disjoint networks This is another possibility for southwest expansion that would incorporate the existing Nexrad radar, and also get us into more of a radar gap area and provide forecasts and nowcasts into the metroplex.Option #2: Expand to SW as two disjoint networksTOTAL NETWORK SIZE = 12 RADARS17
18 Plan for Covering the Whole COG Area Add 3 radars to connect the disjoint networks.Add 3 radars to expand in South East direction.Add 2 radars to expand in North East direction (including Commerce High School and one new site TBD at Merit, near Farm to Market Rd. 36 and County Rd. 1126)TOTAL NETWORK SIZE = 20 RADARS18
19 Proposed Demonstration Projects Public Response to Severe Weather WarningsNeighborhood-based Flash Flood WarningsDevelopment of Impacts-based Weather InformationEmergency Management Training