WEATHER SERVICE AVAILABLE DURING OPERATION CASTIE 1. For Operation CASTLE, the Task Force Weather Central will be estab- lished on Eniwetok during early 195). Later, this central will be moved aboard the command ship when the Commander, Joint Task Force SEVEN moves his command forces aboard; however, the weather station at Eniwetok will remain fully operational during the Bikini phase. When operations shift back te Eniwetok, the Central will again be re-established on Eniwetok. The Task Force Weather Central will be directly supported by four outlying weather stations, a weather reconnaissance flight, Navy patrol aircraft and weather observations from | various aircraft and vessels of the Task Force. The outlying weather stations will be established on Kusaie, Majuro, Ponape and Rongerik, The weather reconnaissance unit will be based on Eniwetok. The Pacific Weather Broadcast Network will be intercepted for all presently available weather observations which will be needed. The outlying stations will make 3-hourly surface observations (8 per day) and 12-hourly upper air soundings (2 per day). The number of observations will be stepped up just prior to each shot. The weather reconnaissance unit will normally fly two tracks per day to obtain surface weather information over water areas where no land reports are available, Just prior to each shot, the flights will be increased to three per day. In addition, the weather reconnaissance unit will be responsible fer storm and typhoon reconnaissance in this area for the duration of the tests. 2. L The Weather Central will analyze the following charts: a. Surface Maps: Four (i) times daily for 000Z, 0600Z, 12002, and 1800Z, of the entire Central Pacific Ocean area, b. 1500 ft Streamline Chart: Four (4) times daily for 03002, 09002, 1500Z and 21002. ce. 700 Millibar Chart: Twice daily for 03002 and 15002. d. 10,000 ft Streamline Chart: e. 500 Millibar - 20,000 ft Streamline Chart, 300 Millibar =~ 30,000 Twice daily for 0900Z and 21002. ft Streamline Chart, 200 Millibar - 40,000ft Streamline Chart, 50,000 ft Streamline Chart and 60,000 ft streamline Charts All will be analyzed four times daily for 0300Z, 09002, 15002 and 21002. f. Weather Distribution Chart: Once daily at O000Z. ge Weather Reconnaissance Cross Section: reconnaissance, stations, h. Wind Time Graphs or Sections: ; i. Wind Tabulation Sheets: For each individual Plotted continuously for all Kept continuously for all stations. je Adiabatic Diagrams and Tabulation Charts: For each individual report from all necessary radiosonde stations in the’Facific area, COPIED/DOE Aprendix J x (h) “50. <a