hh 1 Mareh 1954 1. The following personnel were present for this briefinc: Major Gene ral Clarkson, Dr. Graves, Srig. General LcGinley, Brig. General Estes, Dr. —— SUSJECT: 200K “eather Sriefing Prior to 2R4V0 Shot (B=0445 hours) Ogle, Dr. Duane Sewell, Ur. Reeves, Capt. Knickerbocker, Col. Cowart, Capt. Maynard and It. Col. House. 2. The weather briefing was opened with a general statement on the synoptic situation over the Pacific area. It was osntioned that there was no significant’ change fron the briefing this morning, and that the weather in general was holding up for shot time. 3. The attached forecast was presented (Incl a) which stated that at shot time there rould be 2/8 of cumlus, bases 2,000 feet, tops 5,000 feet; 2/8 of stratocumius, bases 6,000 feet, tops 7,000 feet; L/8 thin cirrus et o + 38,000 feet; widely scattered light showers in the area, but none over shot site at shot tice; and contrail formation level at 35,000 feet. pause height was 55,000 feet; texperature -75°C. The troppo Mention was made of the LO knot wines at 40,000 feet, and that the cirrus was caused by the flow around the high, located at 30 to 40 thousand feet over this area. Le That there might be same locally induced westher caused by the de tonation itself was mentioned, as well as the light and variable winds at 16,000 feet; that these winds would likely Lave a westerly component; and that the level from 7,000 fest through 14,000 feet was also very light aod i ate a8 ase wariable, the tendency being for a «esterly campenent at all thess levels. 5. The terminal forecast for Kwajalein and Wake was given next, stating that Take had been quite poor, with low ceilings and frequent showers but would icprove for shot time and would have broken cumlus and cirrus with scattered showers in the area. For Kwajalein it was stated that there would be contimous showere activity, and that they had been having broken to oo casional overcast lower clouds with occasional showers. These showers se dused visibility to three miles. ‘The latest winds aloft used in this brief= ing were the 2100! winds from the USS CURTISS (Incl 6). with the discus ‘These winds, along sion of the air particle trajectories cacpleted the i: ens the weather briefing. 6. It. Col. House followedthis with the radsafe briefing. It =as com cided te have an additional look at the latest Gnas) at CLOCs 2 Incls ast area forec a. b. tind forecast UL 7 lpbsennek 2 Cc. De Lt. Colonel, USsF Stat? eather Cffices , ’ -