BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, APRIL 3, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME WARMER THAN NORMAL AND SUNNY FOLLOWING OVERNIGHT RAINFALL.... Today we observed light rain and fog this morning that quickly dissipated following the 7 A.M. observation. Overnight rainfall left a total of 0.44 inches of liquid precipitation in the gauge. Visibility improved significantly by 10 A.M., with 75 miles being seen. Wind shifted from east to west since this morning, and became strong following the 1 P.M. A peak gust of 48 mph was measured around 3:55 P.M. Despite the westerly flow, temperatures rose to a high of 60F. This is 9 degrees above the daily normal maximum of 51F. The overnight low only reached 35F, 2 degrees above the normal minimum of 33F. PRELIMINARY STATS FOR MARCH 2019 TEMPERATURE, Deg. F Avg. Max. 44.0 [-0.3] Avg. Min. 26.1 [-0.5] Mean 35.1 [-0.4] 24-hour corrected mean: 35.4 Max. for month: 67F on the 30th Min. for month: 6F on the 7th HEATING DEGREE DAYS Total heating units: 919 [+3] Total for the season: 5405 [-79] Total for last season: 5058 PRECIPITATION, Inches Total: 4.08 [-1.50] Greatest in 24 hrs: N/A SNOWFALL, Inches Total: 23.1 [+10.4] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 13.2 Avg. corrected wind speed: 13.5 Prevailing wind direction: W at 20% Peak gust and direction: 53 S on 31st SUNSHINE: Campbell-Stokes card minutes: 12612 minutes of possible 21516 or 59% Astronomical total minutes: 13031 minutes of possible 22220 or 59% Today's Observations: 7 A.M. Weather: Light rain, overcast nimbostratus, few stratus fractus Temperature: 35F; Dew Point: 35F; Wind: NW at 13G24 kts Sea-level pressure: 29.89 ins. Hg, falling steadily Visibility: 3 miles, fog 6-hr Max temp: 36F 6-hr Min temp: 35F 24-hr Precip: 0.44 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins. BHO SA 1155 E65 OVC 3R-F 121/35/35/3413G24/989/ FEW STFA ALQDS/ 8/72/ 70044 56023 10036 20035 10 A.M. Weather: Broken cumulus, broken cirrus Temperature: 41F; Dew Point: 38F; Wind: NW at 8G14 kts Sea-level pressure: 29.87 ins. Hg, falling steadily Visibility: 75 miles 3-hr Precip: Trace BHO SA 1455 E40 BKN 250 BKN 75 114/41/38/3308G14/987/ 8/802 600// 58007 1 P.M. Weather: Scattered cumulus, few cirrostratus E-S Temperature: 56F; Dew Point: 31F; Wind: W at 10G17 kts Sea-level pressure: 29.82 ins. Hg, falling steadily Visibility: 70 miles 6-hr Max temp: 56F 6-hr Min temp: 35F 6-hr Precip: Trace 6-hr snowfall: 0.0 ins. BHO SA 1755 40 SCT 70 098/56/31/2710G17/982/ FEW CS E-S/ 8/105 600// 58016 10056 20035 SUMMARY FOR TUESDAY, APRIL 2, 2019 TEMPERATURE (DEGREES F) MAX.....50 NORMAL.....50 MIN.....27 NORMAL.....33 MEAN....39 NORMAL.....41 DEPARTURE FROM 30-YEAR NORMAL.........................-2 TOTAL DEPARTURE FOR THE MONTH.........................-6 [-3.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............26 DEPARTURE.........+2 TOTAL HEATING UNITS FOR THE MONTH..............54 DEPARTURE.........+6 TOTAL HEATING UNITS FOR THE SEASON...........5459 DEPARTURE........-73 TOTAL HEATING UNITS LAST SEASON TO DATE......5108 DIFFERENCE......+351 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................29 S AT 3:21 P.M. AERO.........................25 S AT 2:09 P.M. ASOS.........................30 S AT 3:21 P.M. DAVIS........................34 S AT 3:41 P.M. RMY 31 FASTEST MILE FOR YESTERDAY......................24 S AT 4:12 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................23 S AT 4:12 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................25 S AT 4:12 P.M. AVERAGE WIND SPEED AND DIRECTION.............10.0 S ASOS......................10.0 DAVIS.....................10.3 SSE [167 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.44 DEPARTURE.......+0.27 ASOS..............0.43 TOTAL PRECIPITATION FOR THE MONTH..........0.44 DEPARTURE.......+0.10 ASOS..............0.43 TOTAL PRECIPITATION FOR THE YEAR..........13.48 DEPARTURE.......-0.86 ASOS.............13.58 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE........-0.2 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE........-0.4 TOTAL SNOWFALL FOR THE SEASON..............47.6 DEPARTURE.......-12.5 PRELIMINARY CLIMATE SUMMARY FOR MARCH CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY: R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized M: Missing data 03/01 38/17/28/-3/..../.../479/71 16 NNW AERO 13 NNW RMY 22 03/02 31/27/29/-2/..../.../000/00 29 NNE AERO 22 NNE RMY 30 03/03 40/25/33/+1/..../.../367/54 21 ESE AERO 14 ESE RMY N/A 03/04 35/18/27/-5/..../.../130/19 33 W AERO 18 W RMY 32 03/05 29/10/20/-12/0.00/0.0/664/97 28 WNW AERO 12 SW RMY N/A 03/06 24/10/17/-15/0.00/0.0/667/97 40 WNW AERO 25 WNW RMY 41 03/07 26/6/16/-17/0.00/0.0/359/52 35 W AERO 18 W RMY 34 03/08 35/11/23/-10/0.00/0.0/555/80 23 WSW AERO M M RMY M 03/09 43/22/33/0/0.00/0.0/660/98 20 WSW AERO M M RMY N/A 03/10 40/26/33/0/..../.../000/00 32 ESE AERO 23 S RMY 32 03/11 48/33/41/+7/..../.../534/79 40 NW AERO 37 NNW RMY 41 03/12 41/27/34/0/..../.../494/70 32 N AERO 33 N RMY 34 03/13 43/24/34/0/..../.../404/57 18 W AERO 21 W RMY 23 03/14 48/32/40/0/..../.../121/17 25 S AERO 28 S RMY M 03/15 58/40/49/+14/0.12/0.0/000/00 37 SSW AERO 38 SSW RMY 39 03/16 50/31/41/+6/0.00/0.0/695/97 45 W AERO 46 W RMY 48 03/17 40/26/33/-3/0.00/0.0/590/82 40 WNW AERO M M RMY N/A 03/18 41/22/32/-4/0.00/0.0/695/96 29 W AERO M M RMY 30 03/19 44/25/35/-1/0.00/0.0/587/81 25 W AERO M M RMY N/A 03/20 50/27/39/+2/0.00/0.0/684/94 26 S AERO M M RMY 29 03/21 50/33/42/+5/..../.../227/31 25 SSE AERO M M RMY 46 03/22 39/34/37/0/..../.../000/00 40 W AERO M M RMY 44 03/23 45/28/37/-1/0.00/0.0/523/71 45 WNW AERO M M RMY 50 03/24 56/29/43/+5/0.00/0.0/437/59 28 W AERO M M RMY 30 03/25 49/32/41/+3/0.00/0.0/468/63 25 NNW AERO M M RMY N/A 03/26 43/27/35/-4/0.00/0.0/716/96 28 NW AERO M M RMY 28 03/27 42/24/33/-6/0.00/0.0/703/94 21 S AERO M M RMY 23 03/28 51/28/40/+1/0.00/0.0/623/83 35 S AERO M M RMY 37 03/29 53/40/47/+7/0.02/0.0/000/00 26 SSW AERO M M RMY 27 03/30 67/40/54/+14/0.00/0.0/477/63 44 S AERO M M RMY 46 03/31 65/34/50/+9/0.10/0.0/129/17 53 S AERO 52 S RMY 55 PRELIMINARY CLIMATE SUMMARY FOR MARCH CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY: R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized M: Missing data 04/01 45/29/37/-4/0.00/0.0/.../.. 40 WNW AERO 37 W RMY 42 04/02 50/27/39/-2/..../.../.../.. 29 S AERO 25 S RMY 31 04/03 Low temp since midnight is 35F; normal low is 33F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 3 HIGH 76 IN 1892 LOW 16 IN 1894 PRECIP 2.18 IN. IN 1990 SNOWFALL 8.0 IN. IN 1915 PEAK GUST 83e MPH NW IN 1977 [RECORD FOR MONTH] RECORDS FOR APRIL 4 HIGH 76 IN 2010 LOW 12 IN 1954 PRECIP 1.45 IN. IN 1987 SNOWFALL 7.3 IN. IN 2016 PEAK GUST 80 MPH WNW IN 1963 TODAY'S REPORT PREPARED BY: Benjamin Turner