BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, MAY 27, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME WARM AND SUNNY WITH GOOD VISIBILITY ATOP GREAT BLUE HILL.... Today we observed fair weather and a good visibility of 70 miles throughout the day. Winds were light, but shifted from NW-NE as the day went on. Air has remained relatively dry, with the humidity staying around 50%. A distant fog was observed offshore during the 1 P.M. observation. The high so far today is 74F, 5 degrees above the daily normal maximum of 69F. The low since midnight is 60F, nine degrees below the normal minimum of 51F. Today's Observations: 7 A.M. Weather: Scattered cirrostratus, few altocumulus Temperature: 66F; Dew Point: 51F; Wind: NNW at 10G14 kts Sea-level pressure: 29.91 ins. Hg, rising steadily Visibility: 70 miles 6-hr Max temp: 66F 6-hr Min temp: 60F 24-hr Precip: 0.00 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins. BHO SA 1155 300 SCT 70 128/66/51/3410G14/991/ FEW AC ALQDS/ 8/087 51022 10066 20060 10 A.M. Weather: Scattered cirrostratus, few altocumulus Temperature: 74F; Dew Point: 52F; Wind: E at 6 kts, Wind: Light Sea-level pressure: 29.91 ins. Hg, rising, then falling Visibility: 75 miles 3-hr Precip: 0.00 ins. BHO SA 1455 250 SCT 75 127/74/52/1006/991/ FEW AC ALQDS WND LGT/ 8/085 58001 1 P.M. Weather: Scattered cirrus, few cumulus, distant fog offshore Temperature: 73F; Dew Point: 53F; Wind: NE at 5 kts, Wind: Light Sea-level pressure: 29.89 ins. Hg, falling steadily Visibility: 70 miles 6-hr Max temp: 74F 6-hr Min temp: 66F 6-hr Precip: 0.00 ins. BHO SA 1755 250 SCT 70 122/73/53/0605/989/ FEW CU ALQDS DSNT FG OFFSHR WND LGT/ 8/102 56005 10074 20066 SUMMARY FOR SUNDAY, MAY 26, 2019 TEMPERATURE (DEGREES F) MAX.....85   NORMAL.....69 MIN.....49   NORMAL.....51 MEAN....67   NORMAL.....60 DEPARTURE FROM 30-YEAR NORMAL........................+7 TOTAL DEPARTURE FOR THE MONTH.......................-48 [-2.0 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-6 TOTAL HEATING UNITS FOR THE MONTH.............277   DEPARTURE........+36 TOTAL HEATING UNITS FOR THE SEASON...........6178   DEPARTURE........-97 TOTAL HEATING UNITS LAST SEASON TO DATE......5825   DIFFERENCE......+353 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............2   DEPARTURE.........+1 TOTAL COOLING UNITS FOR THE MONTH...............6   DEPARTURE.........-9 TOTAL COOLING UNITS FOR THE SEASON..............6   DEPARTURE........-11 TOTAL COOLING UNITS LAST SEASON TO DATE........52   DEPARTURE........-46 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................40 W    AT  3:42 P.M.                    AERO.........................38 W    AT  4:42 P.M.                    ASOS.........................41 W    AT  3:42 P.M.                    DAVIS........................42 WSW  AT  3:41 P.M.  RMY 39 FASTEST MILE FOR YESTERDAY......................31 W    AT  3:42 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................29 W    AT  3:43 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................31 WSW  AT  2:26 P.M. AVERAGE WIND SPEED AND DIRECTION...............14.6 W                    ASOS........................14.5                    DAVIS.......................14.7 SW [233 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.......-0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........3.74  DEPARTURE.......+0.38                          ASOS..............3.56 TOTAL PRECIPITATION FOR THE YEAR..........24.92  DEPARTURE.......+3.01                          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/..../0.0/.../..           23 S   AERO 23 S    RMY 22 05/04 54/46/50/-4/..../0.0/.../..           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 05/26 85/49/67/+7/..../0.0/.../..           40 W   AERO 38 W    RMY 39 05/27 Low temp since midnight is 60F; normal low is 51F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 27 HIGH 92F IN 1914 LOW 36F IN 1915 PRECIP 1.40 INS IN 1898 PEAK GUST 55 S IN 1956 RECORDS FOR MAY 28 HIGH 92F IN 2016 LOW 39F IN 1917 PRECIP 2.48 INS 1906 PEAK GUST 51e MPH NE IN 1946 TODAY'S REPORT PREPARED BY: Benjamin Turner