BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, APRIL 15, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME DRY WITH BUILDING CUMULUS TO THE WEST FOLLOWING THIS MORNINGS' THUNDERSTORMS.... Thunderstorms this morning and last night leave a total  of 0.96 inches of rainfall in the gauge by 10 A.M. Since then, skies have remained mostly cloudy with some breaks. Wind has  shifted from WNW to SSW since this morning, where a max gust  of 39 mph occurred shortly following 6 A.M. A distant fog  and building cumulus was seen to the west at the 1 A.M.  observation. The high temperature so far today is 65F, 9  degrees above our normal maximum temperature of 56F. The low since midnight was 53F, 15 degrees above our normal  minimum temperature of 38F.   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:  5404 [-80] Total for last season: 5058 PRECIPITATION, Inches Total: 4.08 [-1.50] Greatest in 24 hrs: 1.82 ins. on the 3rd-4th SNOWFALL, Inches Total: 23.1 [+10.4] Greatest in 24 hrs: 15.8 ins. on the 3rd-4th  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: Partial obscuration due to fog, steady rain with thunderstorms ending shortly after 6 A.M.  Temperature: 54F; Dew Point: 54F; Wind: NW at 9G16 kts, Peak wind: 39 MPH (34 kts) WNW at 6:03 A.M. Sea-level pressure: 29.43 ins. Hg, falling then rising Visibility: 1 mile, fog 6-hr Max temp: 62F 6-hr Min temp: 54F 24-hr Precip:  0.92 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins.  BHO SA 1155 –X 1RF 965/54/54/3409G16/943/ PK WND 3434/03/  R+ BCMG R TSEUKN/ 8//// 70092 51010 10062 20054  10 A.M. Weather: Broken altostratus Temperature: 57F; Dew Point: 55F; Wind: SSE at 14G19 kts Sea-level pressure: 29.51 ins. Hg, rising, then more quickly Visibility: 70 miles 3-hr Precip: 0.04 ins. BHO SA 1455 E140 BKN 70 994/57/55/1614G19/951/ FEW STFA  ALQDS/ 8/720 6004/ 55029   1 P.M. Weather: Broken cumulus Temperature: 65F; Dew Point: 53F; Wind: SSW at 10G20 kts Sea-level pressure: 29.41 ins. Hg, falling, then more quickly Visibility: 40 miles, distant fog in all directions 6-hr Max temp: 65F 6-hr Min temp: 53F 6-hr Precip:  0.04 ins. 6-hr snowfall: 0.0 ins.  BHO SA 1755 E40 BKN 40 960/65/53/2010G20/941/ DSNT FG ALQDS/  8/200 6004/ 56034 10065 20053 SUMMARY FOR SUNDAY, APRIL 14, 2019  TEMPERATURE (DEGREES F) MAX.....71   NORMAL.....55 MIN.....51   NORMAL.....37 MEAN....61   NORMAL.....46 DEPARTURE FROM 30-YEAR NORMAL.......................+15 TOTAL DEPARTURE FOR THE MONTH.......................+21 [+1.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............4   DEPARTURE........-15 TOTAL HEATING UNITS FOR THE MONTH.............280   DEPARTURE........-20 TOTAL HEATING UNITS FOR THE SEASON...........5685   DEPARTURE........-99 TOTAL HEATING UNITS LAST SEASON TO DATE......5407   DIFFERENCE......+278 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................25 S   AT 10:50 P.M.                    AERO.........................18 S   AT 11:32 P.M.                    ASOS.........................26 S   AT 11:52 P.M.                     DAVIS........................29 S   AT 11:55 P.M.  RMY N/A FASTEST MILE FOR YESTERDAY......................19 S   AT 11:20 P.M.  MAXIMUM 2-MINUTE ASOS AVERAGE...................20 S   AT 10:59 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 S   AT 11:58 P.M. AVERAGE WIND SPEED AND DIRECTION..............9.0 SSE                    ASOS.......................9.6                     DAVIS......................9.1 SSE [159 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.92  DEPARTURE.......+0.76                          ASOS..............0.87 TOTAL PRECIPITATION FOR THE MONTH..........2.68  DEPARTURE.......+0.32                          ASOS..............2.58 TOTAL PRECIPITATION FOR THE YEAR..........15.72  DEPARTURE.......-0.64                          ASOS.............15.75 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0  DEPARTURE........-0.1 TOTAL SNOWFALL FOR THE MONTH.............TRACE  DEPARTURE........-2.1 TOTAL SNOWFALL FOR THE SEASON.............47.6  DEPARTURE.......-14.2 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/-3/0.00/0.0/479/71           16 NNW AERO 13 NNW RMY 22 03/02 31/27/29/-2/0.48/4.2/000/00           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/..../0.0/.../..           29 S   AERO 25 S   RMY 31 04/03 62/35/49/+7/..../0.0/.../..           54 W   AERO 58 W   RMY 56 04/04 50/34/42/0/..../0.0/.../..            46 W   AERO 41 W   RMY N/A 04/05 47/27/37/-6/..../0.0/.../..           23 SSW AERO 17 SSW RMY 23 04/06 64/32/48/+5/..../0.0/.../..           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 48/34/41/-3/0.49/0.0/.../..           25 NE  AERO 20 NE  RMY 26 04/09 40/32/36/-8/0.08/0.0/.../..           23 NE  AERO 16 N   RMY 25 04/10 43/30/37/-8/T/T/.../..                32 NW  AERO 26 NW  RMY 36 04/11 51/29/40/-5/0.00/0.0/.../..           23 NW  AERO 18 NW  RMY N/A 04/12 53/38/46/+1/.../.../.../..            35 SSW AERO 29 SSW RMY 39 04/13 71/54/63/+17/.../.../.../..           38 SSW AERO 32 SSW RMY N/A 04/14 71/51/61/+15/.../.../.../..           25 S   AERO 18 S   RMY N/A 04/15 Low temp since midnight is 54F; normal low is 38F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 15 HIGH 81 IN 1896 LOW 23 IN 1943 PRECIP 1.75 IN. IN 2007 SNOWFALL 1.0 IN. IN 1916, 1962 PEAK GUST 66 MPH E IN 2007 RECORDS FOR APRIL 16 HIGH 89 IN 2012 LOW 23 IN 1943 PRECIP 2.45 IN. IN 1929 SNOWFALL 2.0 IN. IN 1904, 1962 PEAK GUST 73 MPH E IN 2007 TODAY'S REPORT PREPARED BY: Benjamin Turner