The NASA tracker map...link...shows NOAA's Gulfstream IV-SP (G-IV) 'Gonzo' (N49RF) as being in Honolulu. It was last in the air on 16/17 January: ADS-B link. I'm not sure if it is a frequent visitor or this is unusual.
I'm in the UK near London. The recent ER-2 activity led me to the rest of NASA's fleet and they include the NOAA aircraft on their webpage. I'll be on the lookout for the WB-57F Canberra in February to see where their foreign deployment takes them.