CENTRAL OTAGO

Otago Daily Times, Issue 22023, 4 August 1933, Page 12

CENTRAL OTAGO

JULY WEATHER SUMMARY

(From Our Own Correspondent.) OPHIR, August 2. The following is the report of the Ophir Meteorological Station for the month of July, 1933; Average reading of barometer at 9 a.m., 30.12 in; highest (26th), 30.57 in; lowest (31st), 29.43 in; extreme range, 1.14 in. Mean shade temperature at 9 a.m., 34.6 deg (June, 30.2 deg; July, 1932, 31.6 deg). Highest reading (31st), 50.9 deg; lowest (6th), 24.1aeg. The highest in June was 40.1 deg; in July, 1932, Sl.Odeg. Shade temperature extremes: Mean maximum, 43.4 deg (June, 37.7 deg; July, 1932, 44.3 deg). The highest maximum was 57.7 deg on July 31; the lowest 26.6 deg on July 5. The highest in June was 51.9 deg, and in July, 1932, 58.3 deg. Mean minimum, 28.6 deg (June, 25.6 deg; July, 1932, 23.4 deg). The lowest minimum was 20.6 deg on July 11. The lowest in June was IS.ldeg; in July, 1932, it was 12.9 deg. The mean shade temperature for the month wag 36.0 deg; for June, 31.7 deg. The range of temperature for the mouth was 14.8 deg; for June, 12.1 deg. Grass temperature; Mean minimum, 25.1 deg (June, 22.8 deg; July, 1932, 18.9 deg). The highest was 35.4 deg on July 17; the lowest, IS.Odeg on July 11). The lowest in June was 12.8 deg. The temperature fell to 32deg and lower on 25, mornings; to 30.4 deg (frost) and lower on 22 mornings. In June the corresponding figures were 29 and 29 mornings; in July, 1932, 31 and 31 —every morning of that month. The grass minimum was below 20deg on eight mornings; in July, 1932, on 16 mornings. Mean dry-bulb and wet-bulb temperatures: 9 a.m. —dry 34.6 deg; wet 33.4 deg. 2 p.m. —dry 41.4 deg; wet 3S.Bdeg. Mean relative humidity; 9 a.m., 87 per cent.; 2 p.m., 77.7 per cent, of saturation. In June the corresponding percentages were 95 and 8(3; in July, 1932, 87 and 60.6 per cent. Average clearness of sky: 7 a.m., 35 per cent.; 9 a.m., 34 per cent.; 7 pan., 40 per cent.; 10 p.m., 49 per cent. Ihe number of observations at 9 a.m. of “clear sky” (cloud 0 to 2) was 6; ot “overcast sky” (cloud 8 to 10) was 17. Wind, recorded at 9 a.m.: Forces 8 to 12, nil; forces 4 to 7, one (July 25); calm, 23 days. Daily average force of wind, .5. Direction: N. i day; N.E., 3 days; E. t 3J days; S.E., nil; S.. i day; S.W., J day; W., nil; N.W., nil. Rainfall: July 8, 5 points; 12th, 1 point; 13th. 26 points; 14th, 47 points; 15th, 3 points; 16th, 1 point; 18th, 1 point; 21st, 6 points;—total, 90 points on eight days. Average for July in preceding nine years, 67 points on seven days. Total rainfall from January 1 to July 31, 9.97 inches on 60 days. Other phenomena: Gale, nil; snow, nil; snow lying, nil; hail, nil; lightning, nil; thunder, nil; fog, 5 (3rd to 6th and 16th); mist. 1 (17th); smoke haze, 3 (26th to 28th); dew, 1 (19th); hoar frost, 13; rime, 4 (4th to 7th); glazed frost, 1 (3rd) ; aurora, nil; afterglow, ni The spell of fog occurred continually from 11 p.m. on July 2 till 2 a.m. on July 7 —; u all 99 hours. The spell ot rime (frozen fog) lasted from early on the morning of July 4. till 11.30 a.m. on Jl Four falls of snow occurred on Dunstan Range-a light fall on July 9 and three very light falls on July 14, 16 and 21. Considerable thaw from the -7th -to the 31st left only a coating on the ridge above about 4500 ft alt. General remarks: The changes in atmospheric pressure, were very considerable, especially during the last seven davs of the month. The minimum night temperature, both in the screen and on the grass, !s r he highest for July recorded during the nine years of observation at this station. No snow on the low country in July has been recorded previously only m the years 1926 and 1927. As in the preceding month, there was again much cloudiness and little wind. , , , Supplementary note: August 1 brought its continuance of winter. After a light frost in the morning the sky became overcast before sunrise, and by 11.30 a.m. snow was falling on the ranges. Light rain set in shortly after 12 o’clock, and continued till 2.15 m, “ l ™ nt f noints. Snow continued on the mountains till after 3 p.m., and they are all covered down to the foothills, but the low country is clear, 1 here is keen hoar frost this morning—nearly 14 degrees below freezing on the grass, with a cloudless sky. The maximum temperature yesterday was 41 degrees.