BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY CLIMATE SUMMARY THURSDAY, MAY 19, 2005 ALL TIMES EASTERN DAYLIGHT TIME.. UNLESS OTHERWISE NOTED TODAY'S DISCUSSION.... AT 2 P.M. LIGHT SEABREEZE THIS AFTERNOON AND AGAIN VERY COOL WEATHER FOR MID-MAY... Moderate cumulus spreading out and melting away to altocumulus cumulogenitus early this afternoon but unlike yesterday no rain showers showing up as were observed yesterday afternoon. Temperature are again struggling with the 60-degree or about 8 degrees cooler than normal. TODAY'S OBSERVATIONS 5/19/2005 THU 8 a.m. clear with few clouds northeast through southeast; visibility 35 miles but 45 miles west-northwest; temp. 48; dewpoint 43; wind nw at 07 mph; six hourly min. temp. 42; six hourly precip. 0.05; 24 -hour precip. 0.06 BHO SA 1155 CLR 35 199/48/43/3106/012/ AC/FEW ACC NE-ESE AND DSNT SE-SSE VSBY WNW 45/ 8/080 51014 ASOS 60005 MANUAL 6005/ ASOS 70005 MANUAL 70006 10048 20042 11 a.m. scattered cumulus and moderate cumulus; with visibility 50 miles; temp. 56; dewpoint 38; wind N at 08 mph and variable WNW-ENE; BHO SA 1455 38 SCT 50 198/56/38/3507/012/ MDT CU ALQDS WND 30V07/ 8/200 58001 2 p.m. mostly cloudy with 60 to 70 miles visibility; temp. 58; dewpoint 36; wind nne 05 mph; six hourly max. temp. 61; six hourly min. temp. 48 BHO SA 1755 55 SCT E75 BKN 60 191/58/36/0204/009/ CU/MDT CU XCPT NE-E VSBY NW 70/ 8/260 56007 10061 20048 WEATHER SUMMARY FOR WEDNESDAY MAY 18: TEMPERATURE (DEGREES F) MAX.....59 NORMAL.....68 HAZEN 59.0 @ 2:21 p.m. MIN.....45 NORMAL.....48 HAZEN 45.0 @ 5:00 a.m. MEAN....52 NORMAL.....58 DEPARTURE FROM 30-YEAR NORMAL...... - 6 TOTAL DEPARTURE FOR MAY............ - 78 [for the month, -4.5 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING TOTAL PRECIPITATION 24 HRS ENDING 8 A.M.....0.06 DEPARTURE....-0.06 TOTAL PRECIPITATION FOR MAY.................2.03 DEPARTURE....-0.12 PRECIPITATION FOR ASOS 24 HRS ENDING 8 A.M..0.05 ASOS TOTAL FOR THE MONTH OF MAY. ...........1.97 TOTAL PRECIPITATION FOR THE YEAR........ .23.12 DEPARTURE....+3.11 TOTAL FOR ASOS FOR THE YEAR.............. .22.00 YESTERDAY'S PEAK GUSTS AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........28 N AT 4:16 P.M. AEROVANE.........25 N AT 4:37 P.M. ASOS.............23 N AT 4:37 P.M. DAVIS............25 NNW AT 4:37 P.M. FASTEST MILE FOR YESTERDAY......... 17 N AT 4:33 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......17 N AT 4:38 P.M. MAXIMUM 1-MINUTE DAVIS AVERAGE......17 N AT 4:39 P.M. YESTERDAY'S AVERAGE WIND SPEEDS..... OUR AVERAGE SPEED AND DIRECTION..... 4.7 N ASOS AVERAGE AND DIRECTION.......... 5.8 N [ 010 deg] DAVIS AVERAGE AND DIRECTION......... 4.6 NNE [ 020 deg] THE PRELIMINARY CLIMATE SUMMARY FOR MAY 2005...... CALENDAR DAY DATA DATA REPORTED HERE ENDING MIDNIGHT STANDARD TIME DATE MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 5/1 57/44/51/-1/0.14/118/14 33 MPH WNW 5/2 63/39/51/-1/0.05/593/70 43 MPH S 5/3 58/38/48/-5/0/604/71 30 MPH WSW 5/4 59/40/50/-3/T/400/47 21 MPH E 5/5 60/38/49/-4/0/777/91 23 MPH E 5/6 54/42/48/-6/0.08/103/12 26 MPH NNE 5/7 44/39/42/-12/1.19/000/00 58 MPH N 5/8 47/39/43/-11/0.22/000/00 43 MPH NNW 5/9 52/43/48/-7/0.04/026/03 36 MPH N 5/10 64/46/55/0/0/502/58 20 MPH E 5/11 75/46/61/+6/0/807/93 27 MPH S 5/12 60/41/51/-5/0/835/96 40 MPH NW 5/13 64/35/50/-6/0/846/97 28 MPH WNW 5/14 64/47/56/-1/T/288/33 21 MPH E 5/15 58/41/50/-7/0.14/132/15 ** 24 MPH N 5/16 57/41/49/-8/0.11/193/22 ** 21 MPH ENE 5/17 65/47/56/-1/0/343/39 21 MPH ESE 5/18 59/45/52/-6/0.01/203/23 28 MPH N 5/19 morning low temp. 42 @ 5:38 a.m. early morning rainfall 0.05 inch ** daily precip. amounts corrected DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): NEW OR EQUALED DAILY RECORDS FOR MAY TO DATE: May 7 - NEW RECORD CALENDAR DAY RAINFALL TOTAL OF 1.19 INS.; the previous record was 1.15 inches in 1998 May 13 - MINIMUM TEMPERATURE OF 35 DEGREES EQUALED THE RECORD LOW TEMP. FOR THIS DATE OF 35 DEGREES SET IN 1914. RECORDS FOR MAY 19 HIGH 91F IN 1962 LOW 34F IN 2002 PRECIP 1.54 INCHES IN 1900 PEAK GUST 58 MPH NW IN 1964 RECORDS FOR MAY 20 HIGH 91F IN 1975,1996 LOW 37F IN 1948, 2002 PRECIP 1.65 INCHES IN 1969 PEAK GUST 57 MPH S IN 1963, WNW IN 1982 Today's report by: Robert Skilling