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DECEMBER1940 MONTHLY REVIEW 371

SEVERE LOCAL [Compiled by MARY0. SOUDER from reports submitted by Weather Bureau officialu] [The table herewith contains such data as has been received concerning severe local storms that occurred during the month. A revised list of tornadoes will appear in the Meteorological Yearbook]

Width Value of Character of Plaee Date of path, property Remarks 1 yards destroyed Napoleonville, La. - __ - - __ - -.. 12 ...... Property damaged; 1 person injured. 14-15 Snow, , and The heaviest snow fell in the southwestern portion of the State, with 16 deet. inches at Red Oak and 15 inches at Bedford, while the fall generally er- cceded 10 inches over a broad belt extending from the southwestern to the northeastern corner of the State. Many were blocked especially in the rural areas and transportation was hampered. East of a line extending from Allamakee County southwestward to Ringgold County, the snow changed to aud rain. In Keoke County the coatmg of on wires and trees was reported to be an inch thick and coatings of more than half an inch were reported from Cedar, Johnson Washington, and Hmry Counties. Service was interrupted hecad many communication and power lines were broken. Donaldsonville, La., 2 miles 15 Tornado- - - ______.Property damaged; 3 persons injured. south. Iowa ___._____._.-..-....-.-_. 15 Snow, rain and ice Snow rangin up to 0.6 inches fell in the northern two-thirds of Iowa while in the soutieastern and extreme eastern parts, heavy damage was baused by an all-day rain that from 88 It fell. Damage to telephone and power lines. Kansas, southeastern and 15 Sleet and freezing Damage to telephone and power wires: travel on highways difPicult and south-csntral portions of the rain. dangerous for several days. state. areen Bay, Appleton, New IS10 Snow and .. . 10 to 14 inches,of snow recorded with much lighter falls in the far north- London, and Shawano, western portion of the State. Highways were blocked by drifts greatly Wis.. and vicinities. impeding traklic. Nebmakn ______._.. - -...... 16 ...... ___....__.____ snow._....._...... Drifting snow blocked many roads and highways. Washington, western portion 21-22 ....._____.....____.._ ...... -...... Trees, poles, and wires blown down, tern orary buildings destroyed. Boats of the State. were blown from their moorings, 1 teing completely mecked. Two persons killed by power line falling across their car. At North Head Wash., wind attained a velocity of 84 miles an horn at 930 p. m., locai time. All telegragli, telephone and power lines down due either directly to the wind or to trees falling over the wires. Fort Myers, Fla ...-______.. 26 Tornado. ------. How. demolished, others damaged; 2 persous injured. Palatka, Fla. - - - - - ___ - ______27 -...do .______Storm moved from south to west. Considerable damage to houses and trees; path a mfle long. Bunnell, Fla.__.______.___ n .----do. .__..___- -. Storm moved from south-southwest to north-northeast. Four cabins in a tourist camp demolished. Several persons injured; path 10 miles long. Boca Raton, Fla.______.27 .___.do...______. Storm moved from west-southwest to east-northeast. Damage mostly to trees with loss to some beach property. De Land, Fla ______27 ..... do ____....__..Damage to roofs and chimneys. Path narrow and 154 miles long. Fort Lauderdale, FLa.-- ______27 Wind.. .--- - - __-. . Property damaged; loss to crops; 1 person electrocuted. Dothan, Ala.l_.______27 Tornado______Blowing in from the southeast, the twister ripped off part of the from a stable, jumped over Central of Georgia Railway tracks, skimmed past the city power struck a cotton compress building and then plowed into a lumber yard. ’ A negro was injured when his home was wreck& I From press reports. SOLAR AND SUNSPOT DATA FOR DECEMBER 1940 SOLAR RADIATION OBSERVATIONS vapor pressures at 7:30 a. m. aiicl at 1:30 p. m. (75th ineridian time). By HELENCULLINANE Table 2 contains the average amount,s o€ radistion Measurements of solar radiant received at the received daily on a horizontal surface from both sun and surface of the are niade at 9 stations maintained sky during each week, their departures form normal and by the Weather Bureau and at 10 cooperating stations the accumulated departures since the beginning of the maintained by other institutions. The intensity of the year. The values at most of the stations are obtained total radiation from sun and sky on a horizontal surface froin the records of the Eppley pyrheliometer recording is continuously recorded (from sunrise to sunset) at all on either a microanimeter or a potentiometer. these stations by self-registering instruments; pyrhelio- Normal incidence radiation during December was metric measurements of the intensity of direct solar radia- above normal at Blue Hill, Mass., while the sky was tion at normal incidence are made at frequent int>ervalson unusually overcast at Madison, Wis. clear days at two Weather Bureau stations (Madison, No polarization nieasurements were made at Madison, Wis.; Lincoln, Nebr.) and at the Blue Hill Observatory of Wis., due to overcast skies, or at Blue Hill, due to snow Harvard University. Occasional observations of sky cover. polarization are taken at the Weather Bureau station at Total solar and sky radiation was below normal during Madison and at Blue Hill Observatory. December at all stations except New York and Twin The geographic coordinates of the stut,ions, and descrip- Falls. Madison, Wis., experienced during the last week tions of the instrumental equipment, station exposures, the lowest radiation it has had since the station opened in and methods of observation, together with summaries of 1911. All stations except Blue Hill, Newport, and Fresno the data obtained, up to the end of 1936, will be found in showed an excess in total solar and sky radiation during the MONTHLYWEATHER REVIEW, December 1937, pp. the entire year, while the greatest deficiency experienced 415 to 441; further descriptions of instruments and was at Blue Hill. methods are given in Weather Bureau Circular Q. LATE DATA Table 1 contains the nieasurements of the intensity of direct solar radiation at normal incidence, with means and Total solar and skv radiation for Ithrtca clurinz Aumst: their departures from normal (means based on less than 3 July 30, 469, -1; A;ig. 6, 486, +65; Aug. 13, 390, 054; values are in parentheses). At Lincoln the observations Aug. 20, 484, +43. are made with the Marvin pyrheliometer; at Madison Total solar and sky radiation for during and Blue Hill they are obtained with a recording thermo- November: Oct. 29, 190, +33; Nov. 5, 117, L18; No< pile, checked by observations with a Smithsonian silver- 12, 190, +74; NOV. 19, 116, -2; NOV. 26, 106, +13. disk pryheliometer at Blue Hill. The table also gives Total departure through Dec. 2, $6, 107. Unauthenticated | Downloaded 09/25/21 03:09 PM UTC