The changeable westerly weather conditions continued on August 4th. With changing cloud conditions it remained cool; between 12.58 and 1.25 p.m. a slight shower of rain passed over, not measurable on the Reich Sport Field, and brought a reduction in temperature of 7.2° which was only temporary, and an increase of moisture of 25%. The variable cloudy weather continued till evening with single slight showers. On August 5th, too, the arrival of cool air currents continued; with variable, but for the most part heavy, clouds. A shower of rain fell between 11.37 and 12.04 o'clock with a fall in temperature of 6.3° F. and an increase in relative moisture of 25%. Further showers followed. Later the temperature remained cool, and on the 5th and 6th it remained 7.3° below the normal average for these days. On August 6th cool and cloudy weather prevailed the whole day, it only clearing up quite temporarily about 1.30 p.m. It was not till evening about 6.00 p.m. that the wind fell, and at the same time the clouds disappeared except for high thin cirri. With this the cool, windy and rainy period of westerly weather practically ended. August 7th, too, at first brought slight clouds at medium and high levels, but sunshine coused an increase in temperature. Towards midday the clouds became denser at the middle levels. The wind velocity, however, was small, and the general character of the weather pleasant, in spite of a few drops of rain. With slight wind the sky was fairly clouded the whole of the next day. About 1.45 p.m. single drops of rain fell again; heavy thunder showers were observed in the south from 2.15 - 2.30 p.m. Towards evening the thick layers of high cumulus clouds broke up. High pres-
sure weather conditions now supervened, and the high cirrus clouds disappeared. Only on the 9th towards midday, as a result of the absorption, were fine-weather clouds formed.
The fine weather period reached its climax on August 10th and 11th. With an almost clear sky and moderate winds from the south-east it became very warm during the day. The normal temperatures were exceeded by about 5.4° on the average. On August 12th, especially towards evening, it gradually became dull, and the midday temperature remained lower than that of the previous days. Cool and moist maritime masses of air flowed over the Berlin district during the night before the 13th and brought a refreshing wind with shower clouds. The frequent light showers which fell remained for the most part too small to be measured. As a result of wind and cloud there was no great cooling during the night before the 14th. Towards 9 o'clock the sun broke through for a short time. At about midday rain fell locally in various quantities, and this held on till evening without much break, bringing not less than 1.72 inches of rain at the Olympic Village. That is more than half the rainfall normally expected for the whole month of August. About .6 inches fell at the Reich Sport Field. The temperature was very low, for the most part about 57.2° F., i. e. about 6.3° under normal. This, however, again practically closed the westerly weather period. The character of the weather during the next two days was once more very pleasant. There was a heavy mist early on the 16th, and towards midday single cumulus clouds formed with very slight movements of air.