BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, APRIL 8, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME WARM DAY WITH A PARTLY CLOUDY MORNING MAKING WAY  FOR OVERCAST SKIES IN THE AFTERNOON.... FOGGY WITH RAIN BECOMING DRIZZLE IN THE  AFTERNOON.... This morning we measured 0.30 inches from the  rainfall this morning, and another 0.19 inches by 1 P.M. The rain reduced in intensity throughout the day, with a light drizzle being observed after noontime. Visibility was limited by fog to a 1/16th mile. Pressure has fallen by almost 7 millibars since 7 A.M. Wind has become lighter throughout the day, with an average wind speed around 7 mph. A  gradual wind shift from NE to NNW has occurred  since this morning. The high so far today is  43F, 10 degrees below the normal of 53F. The low  since midnight is 38F, 3 degrees above the daily normal minimum of 35F.  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: Rain Temperature: 40F; Dew Point: 40F; Wind: NE at 11G17 kts  Sea-level pressure: 30.28 ins. Hg, falling steadily Visibility: 1/16th mile, fog 6-hr Max temp: 48F 6-hr Min temp: 40F 24-hr Precip:  0.30 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins.  BHO SA 1155 W3 X 1/16RF 164/40/40/0511G17/001/ R CTD/  8//// 70030 58022 10048 20040  10 A.M. Weather: Light rain Temperature: 38F; Dew Point: 38F; Wind: NE at 13G20 kts   Sea-level pressure: 29.94 ins. Hg, falling steadily Visibility: 1/16th mile, fog 3-hr Precip: 0.16 ins. BHO SA 1455 W3 X 1/16R-F 138/38/38/0413G20/994/ R-CTD/  8//// 6022/ 56026   1 P.M. Weather: Light drizzle Temperature: 42F; Dew Point: 42F; Wind: NNW at 7 kts Sea-level pressure: 29.83 ins. Hg, falling rapidly Visibility: 1/16th mile, fog 6-hr Max temp: 43F 6-hr Min temp: 38F 6-hr Precip:  0.19 ins. 6-hr snowfall: 0.0 ins.  BHO SA 1755 W3 X 1/16L-F 100/42/42/3407/983/ L-CTD/ 8////  6019/ 58044 10043 20038 SUMMARY FOR SUNDAY, APRIL 7, 2019  TEMPERATURE (DEGREES F) MAX.....66   NORMAL.....52 MIN.....41   NORMAL.....35 MEAN....54   NORMAL.....43 DEPARTURE FROM 30-YEAR NORMAL........................+11 TOTAL DEPARTURE FOR THE MONTH........................+11 [+1.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............11   DEPARTURE........-11 TOTAL HEATING UNITS FOR THE MONTH.............149   DEPARTURE........-11 TOTAL HEATING UNITS FOR THE SEASON...........5554   DEPARTURE........-90 TOTAL HEATING UNITS LAST SEASON TO DATE......5243   DIFFERENCE......+311 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................24 S   AT 4:58 P.M.                    AERO.........................18 S   AT 3:22 P.M.                    ASOS.........................25 S   AT 5:00 P.M.                     DAVIS........................26 S   AT 6:30 P.M.  RMY 25 FASTEST MILE FOR YESTERDAY......................17 S   AT 6:30 P.M.  MAXIMUM 2-MINUTE ASOS AVERAGE...................18 S   AT 6:30 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 S   AT 6:30 P.M. AVERAGE WIND SPEED AND DIRECTION................9.8 SSW                    ASOS.........................9.9                    DAVIS.......................10.1 SSW [202 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.30  DEPARTURE.......+0.13                          ASOS..............0.27 TOTAL PRECIPITATION FOR THE MONTH..........0.96  DEPARTURE.......-0.23                          ASOS..............0.91 TOTAL PRECIPITATION FOR THE YEAR..........14.00  DEPARTURE.......-1.19                          ASOS.............14.06 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........-1.2 TOTAL SNOWFALL FOR THE SEASON..............47.6  DEPARTURE.......-13.3 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 66/41/54/+11/0.00/0.0/.../..          24 S   AERO 18 S   RMY 25 04/08 Low temp since midnight is 40F; normal low is 35F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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 RECORDS FOR APRIL 9 HIGH 83 IN 1991 LOW 18 IN 1888 PRECIP 2.38 IN. IN 1935 SNOWFALL 11.0 IN. IN 1917 PEAK GUST 72 MPH WNW IN 1962 TODAY'S REPORT PREPARED BY: Benjamin Turner