BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, APRIL 4, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME WINDY WITH VERY DRY CONDITIONS AND ABUNDANT SUNSHINE ATOP GREAT BLUE HILL.... Wind has remained westerly with a peak gust so far today around 45 mph. Average wind speed has  been at or exceeding 20 mph for the majority of  the day. Despite little to speak of in the way of cloud cover, temperatures remain below normal due to strong cold air advection from the west.  The high so far today is 48F, 3 degrees below  the daily normal maximum of 51F. The low since midnight is 34F, a degree above the normal 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: 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: Clear, few cirrostratus NE-SW Temperature: 36F; Dew Point: 13F; Wind: W at 17G26 kts, Peak wind: 35 MPH (30 kts) W at 5:26 A.M.  Sea-level pressure: 30.26 ins. Hg, rising steadily Visibility: 85 miles 6-hr Max temp: 38F 6-hr Min temp: 34F 24-hr Precip:  Trace 24-hr snowfall: 0.0 ins. Snow depth: 0 ins.  BHO SA 1155 CLR 85 247/36/13/2817G26/026/ FEW CS NE-SW  PK WND 2830/1026/ 8/007 51028 10038 20034  10 A.M. Weather: Clear, few distant cirrus E-S Temperature: 45F; Dew Point: 11F; Wind: NW at 16G24 kts, Peak wind: 37 MPH (32 kts) NW at 9:02 A.M.   Sea-level pressure: 30.27 ins. Hg, rising steadily Visibility: 85 miles 3-hr Precip: 0.00 ins. BHO SA 1455 CLR 85 250/45/11/3116G24/027/ FEW DSNT CI  E-S PK WND 3032/02/ 8/001 53003   1 P.M. Weather: Scattered cirrus Temperature: 47F; Dew Point: 4F; Wind: W at 20G32 kts, Peak wind: 43 MPH (37 kts) WNW @ 12:35 P.M.       Sea-level pressure: 30.26 ins. Hg, falling steadily  Visibility: 85 miles 6-hr Max temp: 48F 6-hr Min temp: 36F 6-hr Precip:  0.00 ins. 6-hr snowfall: 0.0 ins.  BHO SA 1755 250 SCT 85 247/47/4/3020G32/026/ PK WND 3037/35/  8/002 58003 10048 20036  SUMMARY FOR WEDNESDAY, APRIL 3, 2019  TEMPERATURE (DEGREES F) MAX.....62   NORMAL.....51 MIN.....35   NORMAL.....33 MEAN....49   NORMAL.....42 DEPARTURE FROM 30-YEAR NORMAL.........................+7 TOTAL DEPARTURE FOR THE MONTH.........................+1 [+0.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............16   DEPARTURE.........-7 TOTAL HEATING UNITS FOR THE MONTH..............70   DEPARTURE.........-1 TOTAL HEATING UNITS FOR THE SEASON...........5475   DEPARTURE........-80 TOTAL HEATING UNITS LAST SEASON TO DATE......5134   DIFFERENCE......+341 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................54 W   AT 10:18 P.M.                    AERO.........................58 W   AT 10:30 P.M.                    ASOS.........................58 W   AT 10:18 P.M.                     DAVIS........................60 WSW AT 11:12 P.M.  RMY 56 FASTEST MILE FOR YESTERDAY......................40 W   AT 10:20 P.M.  MAXIMUM 2-MINUTE ASOS AVERAGE...................36 WNW AT 11:14 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................39 W   AT 11:14 P.M. AVERAGE WIND SPEED AND DIRECTION.............18.4 W                    ASOS......................17.5                    DAVIS.....................18.3 W [281 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....Trace DEPARTURE.......-0.17                          ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........0.44  DEPARTURE.......-0.07                          ASOS..............0.44 TOTAL PRECIPITATION FOR THE YEAR..........13.48  DEPARTURE.......-1.03                          ASOS.............13.59 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........-0.6 TOTAL SNOWFALL FOR THE SEASON..............47.6  DEPARTURE.......-12.7 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 Low temp since midnight is 34F; normal low is 33F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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 RECORDS FOR APRIL 5 HIGH 81 IN 1928 LOW 15 IN 1995 PRECIP 2.15 IN. IN 1987 SNOWFALL 4.0 IN. IN 1898 PEAK GUST 76 MPH WNW IN 1963 TODAY'S REPORT PREPARED BY: Benjamin Turner