BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, APRIL 19, 2005 ALL TIMES EASTERN DAYLIGHT TIME UNLESS OTHERWISE NOTED TODAY'S DISCUSSION.....AT 2 P.M. VERY DRY CONDITIONS CONTINUE TODAY... RELATIVE HUMIDITY DIPS BELOW 15% FOR 3RD DAY IN A ROW! Very dry conditions continue today with the relative humidity down to 13% at 2 p.m. Today marks the fifth consecutive day with relative humidity values under 20%. The temperature has reached the middle 70's early this afternoon. TODAY'S OBSERVATIONS 4/19/2005 TUE 8 a.m. clear with 80 miles visibility; temp. 59; dewpoint 17; wind se at 07 mph; six hourly min. temp. 46 deg. BHO SA 1155 CLR 80 185/59/17/1306/008/ FEW CI DSNT NE-ESE THN K BLO SHLW INVSN N-NE/ 8/001 50003 10059 20046 11 a.m. clear with 75 miles visibility; temp. 67; dewpoint 19; wind sse 06 mph BHO SA 1455 CLR 75 183/67/19/1505/007/ FEW CI NW-E/ 8/001 58002 2 p.m. high thin scattered clouds; visibility 75 miles;l temp. 75; dewpoint 22; rh 13%; wind sw at 09 mph; six hourly max. temp. 75 deg. BHO SA 1755 300 -SCT 75 154/75/22/2309/998/ WND 18V28/ 8/001 58029 10075 20059 WEATHER SUMMARY FOR MONDAY APRIL 18: TEMPERATURE (DEGREES F) MAX.....70 NORMAL.....56 HAZEN 70.4 @ 5:07 p.m. MIN.....48 NORMAL.....38 HAZEN 48.4 @ 11:58 p.m. * MEAN....59 NORMAL.....47 DEPARTURE FROM 30-YEAR NORMAL......+ 12 TOTAL DEPARTURE FOR THE MONTH......+ 66 (+3.5 DEGREES/DAY) * Eastern Standard Time PRECIPITATION (INCHES) THROUGH THIS MORNING TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00 DEPARTURE....-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.04 DEPARTURE....-0.64 ASOS..............2.04 TOTAL PRECIPITATION FOR THE YEAR..........18.50 DEPARTURE.....+2.34 TOTAL FOR ASOS FOR THE YEAR...............17.52 SNOWFALL (INCHES) THROUGH THIS MORNING TOTAL SNOWFALL 24 HRS ENDING 8 A.M........ 0.0 DEPARTURE....- 0.1 TOTAL SNOWFALL FOR THE MONTH.............. 0.2 DEPARTURE....- 1.7 TOTAL SNOWFALL FOR THE SEASON.............119.4 DEPARTURE.....+60.3 YESTERDAY'S PEAK GUSTS AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........28 WNW AT 4:56 P.M. ** AEROVANE.........30 WNW AT 3:51 P.M. ASOS.............25 WNW AT 3:51 P.M. DAVIS............27 NW AT 3:17 P.M. FASTEST MILE FOR YESTERDAY......... 18 WNW AT 4:17 P.M. ** MAXIMUM 2-MINUTE ASOS AVERAGE.......20 WNW AT 3:52 P.M. MAXIMUM 1-MINUTE DAVIS AVERAGE......20 NW AT 3:17 P.M. OUR AVERAGE SPEED AND DIRECTION.....11.0 WNW ASOS AVERAGE AND DIRECTION..........12.0 DAVIS AVERAGE AND DIRECTION.........11.4 NW [310 deg] ** last of several occurrences... THE PRELIMINARY CLIMATE SUMMARY FOR APRIL 2005...... CALENDAR DAY DATA DATA REPORTED HERE ENDING MIDNIGHT STANDARD TIME DATE MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 4/1 56/36/46/+5/0.01/0/283/37 23 MPH SE 4/2 56/35/46/+4/1.04/0/000/00 53 MPH SE 4/3 53/39/46/+4/0.63.0/254/33 54 MPH SE Aero 55 MPH SE 4/4 52/37/45/+3/0.01/0/131/17 32 MPH W 4/5 63/35/49/+6/0/0/721/93 32 MPH WNW Aero 35 MPH WNW 4/6 66/43/55/+12/0/0/591/76 25 MPH S 4/7 70/44/57/+14/0.07/0/164/21 46 MPH SSW 4/8 56/43/50/+6/0.25/0/212/27 32 MPH NW 4/9 58/39/49/+5/0/0/786/100 22 MPH NW 4/10 70/39/55/+11/0/0/742/94 38 MPH NNE 4/11 48/36/42/-3/0/0/744/94 32 MPH NNE 4/12 48/28/38/-7/0.03/0.2/413/52 32 MPH NE 4/13 50/28/39/-6/0/0/427/78 22 MPH WNW 4/14 50/36/43/-3/0/0/.../.. 23 MPH WNW 4/15 48/34/41/-5/0/0/.../.. 35 MPH NE 4/16 55/35/45/-1/0/0/.../.. 22 MPH ESE 4/17 74/37/56/+9/0/0/784/97 23 MPH WNW 4/18 70/48/59/+12/0/0/795/98 27 MPH NW Aero 30 MPH WNW 4/19 morning low temp. 46 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 19 HIGH 94 IN 1976 [RECORD FOR MONTH] LOW 21 IN 1890 PRECIP 1.71 IN 1969 SNOWFALL 6.0 IN. IN 1887 PEAK GUST 66 MPH E IN 1984 RECORDS FOR APRIL 20 HIGH 88 IN 1927 LOW 18 IN 1897 PRECIP 1.14 IN 1972 SNOWFALL 2.5 IN. IN 1904, 1972 PEAK GUST 76 MPH WNW IN 1963 TODAY'S REPORT BY: Robert Skilling