NOAA is conducting market research to identify vendors capable of supplying up to 18,960 General Purpose aerological sounding balloons annually to support national weather service operations. These balloons, which carry critical weather instrumentation, must be launched from all 102 NWS Upper-Air sites across the country and perform reliably under diverse weather conditions. The performance of these balloons is essential for accurate atmospheric data used in weather forecasts and aviation support. Interested vendors must review the attached specifications and confirm their capability to provide the supplies.