They do what they can within the budgets that Congress allows for them. The WSR-88D radar system have been and is being upgraded when possible. The electronics are the easiest for them to update ( relative statement since it's still quite the undertaking to design and create etc ) but the biggest issue with getting replacement parts are going to be the actual hardware that is used for the pedestal, radar horn and antenna etc. These parts aren't able to be mass produced, so you can't just go out and order a new bull ring for example ( the part the main dish antenna sits and spins on ). Estimated time to replace a bull ring is about 10 days. During that time, they must hoist up 15,000 lbs of equipment in order to lift the 4,000 lbs of the dish antenna assembly. They do keep a stock pile of replacement parts but it's not feasible to keep a large number of them due to their cost and the budget they must work within.
Originally they were planning to replace and modernize the radar network with the newer phased array type by 2022. Of course budget cuts certainly have played their role in slowing that adoption, but probably not as much as technical issues that they have had to work out. The initial designs they had working were unable to also provide the critically needed dual polarization technology they currently rely on so that initial project was shut down finally in 2016. In 2018, a new type was installed at their test site here at Westheimer Airport. It contains a single phased array panel that can see a full 90° without needing to be turned. To turn the panel, they use a similar pedestal as the current radar so they can get a full 360° of coverage. If things go as expected, they may use that style ( moving pedestal ) or may combine 4 ( or more ) panels so it won't require moving parts which could cut down on maintenance costs. They will make that decision after they get further into the testing and find out what limitations may exist.
WOW! I thought those large dishes and domes WERE the old system. Don't know the model type.. I say this because back in 1989 I spent the summer on the big island. There was this radio station in Hilo (KBIGFM) and they just installed the first weather radar in the state; or so I was told... I never heard about weather radar in Hawaii before then. One day I was sitting in my cabin listening to the radio and they said some heavy rain was about 2 minutes out from where I was located. I didn't think nothing about it, until about 2 minutes later, ha! It started to pour! I went up to the window in disbelief, but yeah, it's pouring all right; I was blown away! I was thinking, I wish we had this technology on Oahu.
However, before I return to Oahu for school I gotta see that set up! So one day I went to KBIGFM in Hilo. I stuck my head in the door and said, "hi I'm from Oahu and we don't have this radar there.. Can someone show me the system"? The very nice lady said "sure come on in!" "YES!!!" This guy walks down the hall and takes me into a room with computers for the radar system. He also showed me the antenna. It was not a huge golf ball looking round dome with two large dishes in it.
It was a kind of a small, tall half domed shape thing atop a fat mast. It was (I think) about 2 or 3 feet in diameter on the bottom and about 2 or 3 feet high. I know it was not big at all and I was amazed it had a 200 mile range. Again, that's what I was told.. I really don't think that our 4 radars here are those big giant ones. I thought they're these little jobs that I saw on the big island decades ago. If I'm wrong I want to know..
I did hear that there was some R/D going on with the latest phased array technology but when ever it does come out; Hawaii won't get it for at least 10/15 years; DOH!!!
Hey I'm still seeing action in tornado alley! Just maintain full power to the damn shields to be on the safe side...
Keep it coming friend...
Rster...