DECEMBER, 1929 MONTHLY WEATHER REVIEW 525 TABLE 1 .-Averaged, depaitiires, and extremes of atmospheric p r f s - 8ure at sea lciwl at indicated hoiirs, North Pacific Occan and ndjci- cent waters, December, 1929 Inches Inch Inches Point Barrow 1 2 .............- 30.w ._..._._.. 30.62 Dutch Harbor 1 _._._.......... 29.75 +0. li 30.36 St. Paul I ___....._..._...._.__ ' 3 .7 5 +O. 14 30.44 hodiak 1 .__.._.............___ 39. i 5 +n. 17 30.42 Midway Island 1 4 .........- ~~ SO. 11 +O. Oi 311.34 Honolulu 5 .__._.........._____ 29. $14 -0. os 311. n i Juneau 3.- .. ... . ._._...._. ~. . . 29.89 +0. 10 3lJ.35 Tatoosh Island 6 6 .__________ __ 3. !I; 0. no I an. 44 San Francisco 8 * ______________ 30.12 +0. 01 ' XI. 34 san Diego 3 6 .________________ 80.04 0.00 I 30.39 1 P. m. observations only. 2 For 3s days. 8 And on other dates. 4 For 30 days. 6 A m. and I ). N. ohservatimw. 8 Corrected to 24-hnur mean. December as a whole was a somewhnt stormier mont,h than November over most of the uppe,r half of the ocean, although the number of the more violent gales was le,ss. High winds this month were more widespread as to area and days of occurrence and were reported from some 10- cality or other on every day escept the 12t,h. The greatest number of days with gales reported from any 5' square was 8, occurring east of Japan. Data a t hand show that steamships encountered full storm to hurri- cane velocities on four clays; on the 4th, in the lower part of the Bering Sea and also a few hundred miles north- west of Midway Island; on the 20th, south of the west,ern Aleutians; and on the 21st and 25th, east of northern Japan. I n November there were seven clays wit,h wind forces of 11 to 12 on the ocean, latest reports for the month showing that violent gales, not nienbioned in the previous review of North Pacific weather, occurred e.ast and northeast of Japan on the 23d, 24th, and 27th. During the current month wind forces of 8 to 10 were common along the whole length of the northern and murh of the middle routes. From t,he 2d to the Gt'h a cyclone that prevailed between the Ha.waiian Islands and Cali- fornia occasioned much rough weather, with fresh to whole gales, and anticyclonic gales occurred in the same region on the 30th and 31st. On the 13th) 14th, 22d, 24th, and 25th gales were encountered along the Washington, Oregon, and northern California coasts. The maximum wind velocity a t Tatoosh Tsla.nd was a t the rate of 57 miles an hour-force 10-from the east on the 13th. To the westward of the coast region as far as the one hundred and eightieth meridian, north of the parallel of 40°, while frequent gales blew early in the month, the greatest number occurred in the last decade during the days when the Aleutian cyclone was most active. West of the central meridian the frequent gales were due largely to the presence of a fairly permanent cyclonic area-the westernmost extension of the Aleutian Low- south of Kamchatka, and to the activity of a number of cyclones which entered the ocean from Asia. OR the coast of China gales, usually of moderate force but some- times becoming fresh, were of the northeast. monsoon type. These were apparently of greatest severity on the 3d and 4th) when a powerful anticyclone pushed upon the China and Eastern Seas. The Gulf of Tehuantepec was the scene this mont'h of frequent strong northers. Gales were reported by sea- men as occurmg here on a t least 12 days, on four of which, the 3d, 19th, 22d, and 23d, they attained to whole gale force. Several of these blew over a wide area of sea to the southward, but ceased rather abruptly to the west- ward of the gulf, as witness t8he instance of the British motorship Loch Goil, which, in 1st. 16' N., long. 99' W., on t,he 19t8h was esperienc,ing calms and light airs, whde a violent Tehuantepecer was blowing south of the isthmus. At Salina Cruz masiinuni wind velocities from the north, in miles per hour, occurred as follows: On the 3d, 64 miles; 4t8h mid 26th, 56 miles; 29th) 60 miles, these const8itmut8ing whole gales t,o st80rm winds at t,he head of t'he hay. The prevailing wind direction at Honolulu was north- e,nst, whe,reas in December it is usunlly east, and the inasimum wind veloc.it8y was n t the rate of 28 miles an hour from the northe,ast8 on tQe 30th. Over the nort8hwest8ern part of the oce,an scattered fog showed (1.11 increase from two days of occurrence. in Nove.mhe.r to five days in December. It was most wide- spre,ad in area 011 bhe 9th, loth, and 19th. Occasional fog was met with thence eastward to American waters. Along the Ainerkan coast it was reported on seven days in t,he vicinity of Puget Sound, on 13 days outside of San Francisco Harbor, and on eight days outside of San Diego. It decrea'sed southward, but occurred on the 11th and 12th in the Gulf of Tehuantepec. Here the American steamship Coriii,to e,ncountered it with a west-south- we.sterly wind, immediately following a strong norther from west-northwest on the 11th. TYPHOONS AND DEPRESSIONS IN NOVEMBER, 1929 By Rev. Josfi CORONAE, S. J. Weather Bureau, Manila. P. I. One Philippine and China Sea typhoon and one Pacijc typli.oon.--There were only two well-developed typhoons noticed over the Far East during the month of No- vember, one of them having traversed the Philippines through the Visayan Islands and the Sulu Sea on the 10th and 11th. This Philippine typhoon was probably formed on the 8th in very low latitude to the southwest of Pelew Is- lands near 132' longitude E. and 5' latitude N. It moved northwestward on the 8th and inclined to WNW. on the 9th, reaching the Philippines near to the north of Surigao during the night of the 9th to 10th. In the morning of the 10th it moved NNW. for a few hours, and then it took a westward direction in the afternoon of the same day. This west direction was kept until the 12th when it began to move again to WNW, in the China Sea. While traversing the Visayan Islands, this typhoon appeared to be only a shallow depression of little Import- ance; but it began to develop more in the Sulu Sea and became a much developed and severe typhoon rn the China Sea. The steamer Calchas passed through its cen- ter a t 3:30 p. m. of November 14 in 112' 07' longitude E. and 13' 57' latitude N. The barometric minimum re- corded a t that time was as low as 28.38 inches (720.84 mm.), the winds blowing from ENE. force 9 before the minimum and from SW. force 9 to 10 after the minimum. The captain of the steamer describes thus the passing of the center: In the central area, we noticed many land birds including a wild duck. The sun shone clearly for a period of about 20 minutes. The wind was light and variable, and the sea waE very rough and confused (pyramidal). The approximate positions of the center a t 6 a. m. of November 8 to 15 were as follows: November 8, 6 a. m., 132O 16' longitude E. 6' 26' latitude N, November 9, 6 a. m., 129' 45' longitude E., 7' 46' latjtude N, November 10, 6 a. m., 124' 26' longitude E., 10' 30' latitude N. 526 MONTHLY WEATHER REVIEW DECEMBER, 1929 November 11, 6 a. m., 121' 15' longitude E., 11' 25' latitude N. November 12, G a. m., 118' 10' longitude E., 11' 35' latit,ude N. November 13, G a. m., 115' 50' longitude E., 12' 20' latitude N. November 14, G a. m., 113' 40' longitude E., 13' 10' latitude N. November 15, 6 a. ni., 110' 40' longitude E., 14' 20' latitude N. The other Pacific typhoon was shown in our weather maps of the 20th as forming to the sout8h of Guam not, fnr from 145" longitude E. nnd 9' latitude N. It moved nort