BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, MAY 26, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME OVERNIGHT THUNDERSTORM LEADING TO WARM DAY WITH INCREASING WINDS… A passing overnight thunderstorm brought on 0.47 inches of rain around 12:00 A.M. last night. This lead to this morning being partially humid with dew points in the upper 50s  and a relative humidity of 91% at the 7 A.M. observation. As the day went on relative humidity began to decrease and winds started to increase with a peak gust of 27 kts (31 MPH) west at 1243E. The high so far today is 75F, 7 degree above the daily normal maximum of 68F. The low since midnight is 49F, a degrees below the normal minimum of 50F Today's Observations: 7 A.M. Weather: Scattered cirrus Temperature: 60F; Dew Point: 57F; Wind: W at 11G17 kts Sea-level pressure: 29.88 ins. Hg, rising, then falling Visibility: 45 miles 6-hr Max temp: 62F 6-hr Min temp: 47F 24-hr Precip: 0.47 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins. BHO SA 1155 220 SCT 45 121/60/57/2611G17/988/ FEW CU ALQDS FEW AC ALQDS DSNT HZ ALQDS 8/002 58005 70047 10080 10062 20047 10 A.M. Weather: Scattered cirrus Temperature: 64F; Dew Point: 61F; Wind: WNW at 10 kts, Sea-level pressure: 29.88 ins. Hg, rising, then falling Visibility: 50 miles 3-hr Precip: 0.00 ins. BHO SA 1455 250 SCT 50 121/64/61/2910/988/ FEW CU ALQDS FEW AC ALQDS DSNT HZ ALQDS 8/004 50001 1 P.M. Weather: Scattered cumulus, Scattered cirrus Temperature: 84F; Dew Point: 62F; Wind: W at 18G27 kts, Peak Wind: W 27 kts (31 MPH) @ 1243E Sea-level pressure: 29.83 ins. Hg, falling, then more quickly Visibility: 50 miles 6-hr Max temp: 84F 6-hr Min temp: 61F 6-hr Precip: 0.00 ins. BHO SA 1755 35 SCT 50 SCT 250 102/84/62/2818G27/983/ PK WND 2827/43/ DSNT HZ ALQDS 8/204 58019 10084 20061 SUMMARY FOR SATURDAY, MAY 25, 2019 TEMPERATURE (DEGREES F) MAX.....75   NORMAL.....68 MIN.....47   NORMAL.....50 MEAN....61   NORMAL.....59 DEPARTURE FROM 30-YEAR NORMAL.........................1 TOTAL DEPARTURE FOR THE MONTH.......................-54 [-2.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............4   DEPARTURE.........-3 TOTAL HEATING UNITS FOR THE MONTH.............277   DEPARTURE........+43 TOTAL HEATING UNITS FOR THE SEASON...........6178   DEPARTURE........-91 TOTAL HEATING UNITS LAST SEASON TO DATE......5825   DIFFERENCE......+353 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE.........0 TOTAL COOLING UNITS FOR THE MONTH...............4   DEPARTURE.........-10 TOTAL COOLING UNITS FOR THE SEASON..............4   DEPARTURE.........-12 TOTAL COOLING UNITS LAST SEASON TO DATE........42   DEPARTURE........-38 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................MISSING                    AERO.........................35 SSW  AT 11:43 P.M.                    ASOS.........................39 S    AT 11:43 P.M.                    DAVIS........................43 S    AT 11:42 P.M.  RMY 39 FASTEST MILE FOR YESTERDAY......................29 SSW  AT 11:48 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................26 S    AT 11:50 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................29 S    AT 11:49 P.M. AVERAGE WIND SPEED AND DIRECTION...............11.0 SSW                    ASOS........................11.7                    DAVIS.......................11.2 SSW [209 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.47  DEPARTURE.......-0.16                          ASOS..............0.49 TOTAL PRECIPITATION FOR THE MONTH..........3.74  DEPARTURE.......+0.53                          ASOS..............3.56 TOTAL PRECIPITATION FOR THE YEAR..........24.92  DEPARTURE.......+3.16                          ASOS.............24.71 PRELIMINARY CLIMATE SUMMARY FOR MAY 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 05/01 57/40/49/-4/0.00/0.0/.../..           21 S   AERO 21 SSE  RMY 21 05/02 45/41/43/-10/0.02/0.0/.../..          21 NE  AERO 21 SSW  RMY 20 05/03 60/43/52/-1/..../.../.../..           23 S   AERO 23 S    RMY 22 05/04 54/46/50/-4/..../.../.../..           14 ENE AERO 14 ENE  RMY 17 05/05 52/44/48/-6/0.00/0.0/.../..           18 NE  AERO 20 NE   RMY N/A 05/06 58/44/51/-3/..../0.0/.../..           25 NE  AERO 26 ENE  RMY 24 05/07 72/41/57/+2/0.12/0.0/.../..           30 S   AERO 29 S    RMY 30 05/08 67/48/58/+3/0.00/0.0/.../..           20 NE  AERO 20 NE   RMY 19 05/09 60/43/52/-3/0.00/0.0/.../..           21 SE  AERO 21 E    RMY 22 05/10 61/46/54/-1/0.16/0.0/.../..           35 S   AERO 37 S    RMY 37 05/11 68/50/59/+3/..../.../.../..           26 NW  AERO M  M    RMY N/A 05/12 50/36/43/-13/0.68/.../.../..          30 ENE AERO M  M    RMY N/A 05/13 52/38/45/-11/..../.../.../..          35 E   AERO M  M    RMY 34 05/14 44/38/41/-16/..../.../.../..          26 NNE AERO M  M    RMY 25 05/15 58/40/49/-8/..../.../.../..           28 NW  AERO M  M    RMY 28 05/16 68/46/57/0/..../.../.../..            17 NW  AERO M  M    RMY 19 05/17 64/49/57/0/..../.../.../..     22 WNW AERO 21 WNW  RMY 25 05/18 72/49/61/+3/..../.../.../..           26 SSE AERO 25 SSE  RMY 29 05/19 69/50/60/+2/..../.../.../..           39 S   AERO 43 SSE  RMY 42 05/20 85/52/69/11/..../.../.../..     35 SW  AERO 40 SW   RMY 39 05/21 69/52/61/+2/0.00/.../.../..           40 NW  AERO 46 NW   RMY 45 05/22 68/49/59/0/0.00/.../.../..            32 NNW AERO 29 NW   RMY N/A 05/23 68/48/58/-1/.../.../.../..     36 SSW AERO 37 SSW  RMY 40 05/24 68/47/58/-1/.../.../.../..     47 NW  AERO 47 NW   RMY 51 05/25 75/47/61/1/.../.../.../..     M  M   AERO 35 SSW  RMY 39 Low temp since midnight is 48F; normal low is 50F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 25 HIGH 91F IN 2007 LOW 37F IN 1967 PRECIP 3.73 INS IN 1967 PEAK GUST 83 MPH NE IN 1967 (RECORD FOR MAY) RECORDS FOR MAY 27 HIGH 92F IN 1914 LOW 36F IN 1915 PRECIP 1.40 INS IN 1898 PEAK GUST 55 S IN 1956 TODAY'S REPORT PREPARED BY: Nicholas Rousseau