BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, APRIL 7, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME WARM DAY WITH A PARTLY CLOUDY MORNING MAKING WAY FOR OVERCAST SKIES IN THE AFTERNOON.... This morning, the sky was only partially obstructed with some scattered altocumulus clouds early on. At the 10 o'clock observation, about two-thirds of the sky was obstructed, and by 1 o'clock, nearly overcast conditions were experienced at the observatory. Temperatures today have been warm, reaching up to 63F so far, which is 11 degrees above our normal maximum temperature for today. Wind speeds have increased slightly through the day from calm wind early this morning to regular gusts up to 16 knots by the late morning into the early afternoon. 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: 34.7 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: Scattered altocumulus Temperature: 45F; Dew Point: 37F; Wind: SE at 5 kts Wind: light Sea-level pressure: 30.28 ins. Hg, falling then rising Visibility: 70 miles 6-hr Max temp: 45F 6-hr Min temp: 41F 24-hr Precip: 0.00 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins. BHO SA 1155 130 SCT 70 253/45/37/1305/028/ DSNT HZ ALQDS WND LGT/ 8/050 50002 10045 20041 10 A.M. Weather: Broken altocumulus Temperature: 58F; Dew Point: 35F; Wind: SW at 6 kts Sea-level pressure: 30.31 ins. Hg, increasing, then more slowly Visibility: 70 miles, distant haze in all directions 3-hr Precip: 0.00 ins. BHO SA 1455 E140 BKN 70 264/58/35/2306/031/ DSNT HZ ALQDS/ 8/050 51011 1 P.M. Weather: Broken altostratus Temperature: 62F; Dew Point: 40F; Wind: SW at 9 kts Sea-level pressure: 30.24 ins. Hg, falling, then more quickly Visibility: 70 miles, distant haze in all directions 6-hr Max temp: 63F 6-hr Min temp: 45F 6-hr Precip: 0.00 ins. 6-hr snowfall: 0.0 ins. BHO SA 1755 E140 BKN 70 242/62/40/2209/024/ DSNT HZ ALQDS/ 8/010 58022 10063 20045 SUMMARY FOR SATURDAY, APRIL 6, 2019 TEMPERATURE (DEGREES F) MAX.....64 NORMAL.....52 MIN.....32 NORMAL.....35 MEAN....48 NORMAL.....43 DEPARTURE FROM 30-YEAR NORMAL.........................+5 TOTAL DEPARTURE FOR THE MONTH..........................0 [-0.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............17 DEPARTURE.........-5 TOTAL HEATING UNITS FOR THE MONTH.............138 DEPARTURE..........0 TOTAL HEATING UNITS FOR THE SEASON...........5543 DEPARTURE........-79 TOTAL HEATING UNITS LAST SEASON TO DATE......5217 DIFFERENCE......+326 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................24 NW AT 7:07 P.M. AERO.........................18 W AT 2:01 P.M. ASOS.........................26 NNW AT 7:09 P.M. DAVIS........................25 WSW AT 1:36 P.M. RMY 26 FASTEST MILE FOR YESTERDAY......................19 W AT 2:01 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 W AT 3:14 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................19 WSW AT 2:01 P.M. AVERAGE WIND SPEED AND DIRECTION...............8.8 NW ASOS........................9.0 DAVIS.......................9.1 WSW [254 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.......-0.17 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.66 DEPARTURE.......-0.36 ASOS..............0.64 TOTAL PRECIPITATION FOR THE YEAR..........13.70 DEPARTURE.......-1.32 ASOS.............13.79 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE........-0.1 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE........-1.1 TOTAL SNOWFALL FOR THE SEASON..............47.6 DEPARTURE.......-13.2 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/-3/0.00/0.5/479/71 16 NNW AERO 13 NNW RMY 22 03/02 31/27/29/-2/0.48/3.7/000/00 29 NNE AERO 22 NNE RMY 30 03/03 40/25/33/+1/0.12/1.5/367/54 21 ESE AERO 14 ESE RMY N/A 03/04 35/18/27/-5/1.70/14.3/130/19 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 43/22/33/0/0.00/0.0/683/98 20 WSW AERO M M RMY N/A 03/10 40/26/33/0/0.53/1.0/000/00 32 ESE AERO 23 S RMY 32 03/11 48/33/41/+7/0.00/0.0/555/79 40 NW AERO 37 NNW RMY 41 03/12 41/27/34/0/0.00/0.0/494/70 32 N AERO 33 N RMY 34 03/13 43/24/34/0/0.00/0.0/404/57 18 W AERO 21 W RMY 23 03/14 48/32/40/0/0.00/0.0/121/17 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/-4/0.00/0.0/694/96 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/+5/0.02/0.0/227/31 25 SSE AERO M M RMY 46 03/22 39/34/37/0/0.86/T/000/00 40 W AERO M M RMY 44 03/23 45/28/37/-1/0.12/2.1/523/71 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 62/35/49/+7/..../.../.../.. 54 W AERO 58 W RMY 56 04/04 50/34/42/0/..../.../.../.. 46 W AERO 41 W RMY N/A 04/05 47/27/37/-6/..../.../.../.. 23 SSW AERO 17 SSW RMY 23 04/06 64/32/48/+5/..../.../.../.. 24 NW AERO 18 W RMY 26 04/07 Low temp since midnight is 41F; normal low is 35F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 7 HIGH 90 IN 2010 LOW 13 IN 1982 PRECIP 1.72 IN. IN 1924 SNOWFALL 4.5 IN. IN 1967, 1996 PEAK GUST 65 MPH WNW IN 1982 RECORDS FOR APRIL 8 HIGH 87 IN 1991 LOW 17 IN 1888 PRECIP 1.78 IN. IN 1956 SNOWFALL 9.3 IN. IN 1956 PEAK GUST 70 MPH S IN 2000 TODAY'S REPORT PREPARED BY: Samantha Richard