Marine Radar
All RADARs work well in good weather!!! The maximum radar range is determined by target height, output power and antenna length. The higher the value the better the performance. So in bad weather if my antenna is longer and my output power is higher than yours, I should get better range than you.
For a complete technical explanation of radar technology, the components of a radar and a great summary of the basics, see RADARtutorial

Raymarine Quantum Q24C Radome Wi-Fi Radar
From: RRP $3,399.00
$3,044.50
Furuno DRS4D NXT UHD Digital Radar
RRP: $5,445.00
NOW: $4,899.00
Garmin GMR424 xHD2 Open Array Radar Antenna
RRP: $6,699.00
NOW: $6,238.50
Humminbird HB2124 CHIRP Radar
$4,149.00Raymarine 5m Digital Radar Cable With Raynet Connector
RRP: $279.00
NOW: $258.50
Raymarine Quantum 2 CHIRP Radar
RRP: $4,499.00
NOW: $4,129.00
Garmin Fantom 54 Open Array Radar
RRP: $9,899.00
NOW: $9,218.00
Garmin Fantom 56 Open Array Radar
RRP: $11,749.00
NOW: $10,941.00
Lowrance Halo24 Pulse Compression Radar
RRP: $4,799.00
NOW: $4,423.00
B&G Halo24 Pulse Compression Radar
RRP: $4,799.00
NOW: $4,664.65
Simrad Halo24 Pulse Compression Radar
RRP: $4,799.00
NOW: $4,112.00
Seaview SM-18-R Mast Mount To Suit 18-24" 3G/4G/Halo20/20+ Radars
RRP: $617.00
NOW: $599.00
Seaview SMG-18-U Stainless Steel Mast Mount Guard To Suit 18" 3G/4G Radar
RRP: $626.00
NOW: $622.00
Seaview LBT-R Light Bar
$243.00Seaview Radar Wedge 4 Degree RDW4-2 To Suit 18" 3G/4G/Raymarine/Garmin Radome
RRP: $317.00
NOW: $315.00
Seaview Modular 3G/4G Radar Mounts
From: RRP $232.00
$230.50
Lowrance Halo20 Pulse Compression Radar
RRP: $2,999.00
NOW: $2,721.00
Lowrance Halo20+ Pulse Compression Radar
RRP: $3,499.00
NOW: $3,275.50
Simrad Halo20 Pulse Compression Radar
RRP: $2,999.00
NOW: $2,807.50
B&G Halo20 Pulse Compression Radar
RRP: $2,999.00
NOW: $2,807.50