BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, MAY 23, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME A DRY DAY WITH DECREASING PRESSURE AND INCREASING AFTERNOON WINDS.... Today we observed decreasing visibility throughout the day, with 70 miles this morning and 40 miles this afternoon due to haze. Mostly cloudy skies were seen in conjunction with a pressure fall of 5 mb between this morning and afternoon. Wind has remained southwesterly, gradually increasing in intensity. The peak gust so far today is 36 mph, occurring shortly before the 1 P.M. observation. The high so far today is 67F, a degree below the daily normal maximum of 68F. the low since midnight is 48F, 2 degrees below the normal minimum of 50F.   Today's Observations: 7 A.M. Weather: Broken altocumulus Temperature: 55F; Dew Point: 44F; Wind: SSW at 14G22 kts Sea-level pressure: 30.21 ins. Hg, falling steadily Visibility: 70 miles 6-hr Max temp: 55F 6-hr Min temp: 48F 24-hr Precip: 0.00 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins. BHO SA 1155 E70 BKN 70 231/55/44/2014G22/021/ 8/070 58008 10055 20048 10 A.M. Weather: Overcast stratus Temperature: 60F; Dew Point: 49F; Wind: S at 14G22 kts Sea-level pressure: 30.16 ins. Hg, falling, then more rapidly Visibility: 70 miles 3-hr Precip: 0.00 ins. BHO SA 1455 E50 OVC 70 215/60/49/1814G22/016/ 8/7// 58016 1 P.M. Weather: Broken stratocumulus Temperature: 66F; Dew Point: 44F; Wind: SW at 19G31 kts, Peak wind: 36 MPH (31 kts) SW at 12:37 P.M. Sea-level pressure: 30.06 ins. Hg, falling rapidly Visibility: 40 miles, distant haze 6-hr Max temp: 67F 6-hr Min temp: 55F 6-hr Precip: 0.00 ins. BHO SA 1755 E50 BKN 40 178/66/44/2219G31/006/ DSNT HZ ALQDS PK WND 2231/37/ 8/800 58037 10067 20055 SUMMARY FOR WEDNESDAY, MAY 22, 2019 TEMPERATURE (DEGREES F) MAX.....68   NORMAL.....68 MIN.....49   NORMAL.....50 MEAN....59   NORMAL.....59 DEPARTURE FROM 30-YEAR NORMAL.........................0 TOTAL DEPARTURE FOR THE MONTH.......................-54 [-2.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............6   DEPARTURE.........-1 TOTAL HEATING UNITS FOR THE MONTH.............259   DEPARTURE........+49 TOTAL HEATING UNITS FOR THE SEASON...........6160   DEPARTURE........-88 TOTAL HEATING UNITS LAST SEASON TO DATE......5822   DIFFERENCE......+338 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE.........-1 TOTAL COOLING UNITS FOR THE MONTH...............4   DEPARTURE.........-8 TOTAL COOLING UNITS FOR THE SEASON..............4   DEPARTURE.........37 TOTAL COOLING UNITS LAST SEASON TO DATE........37   DEPARTURE........-33 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................32 NNW AT 5:55 A.M.                    AERO.........................29 NW  AT 3:53 A.M.                    ASOS.........................35 NW  AT 5:56 A.M.                    DAVIS........................34 W   AT 6:27 A.M.  RMY N/A FASTEST MILE FOR YESTERDAY......................23 NNW AT 6:34 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................22 NW  AT 6:29 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 WNW AT 6:29 A.M. AVERAGE WIND SPEED AND DIRECTION...............12.0 NW                    ASOS........................12.0                    DAVIS.......................11.9 W [278 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.......-0.14                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........3.00  DEPARTURE.......+0.25                          ASOS..............2.82 TOTAL PRECIPITATION FOR THE YEAR..........24.18  DEPARTURE.......+2.88                          ASOS.............24.03 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 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 23 HIGH 92F IN 1964,1992 LOW 38F IN 1976 PRECIP 0.97 INS IN 1979 PEAK GUST 49e MPH W IN 1945 RECORDS FOR MAY 24 HIGH 92F IN 1964 LOW 35F IN 1956 PRECIP 2.13 INS IN 1951 PEAK GUST 54 MPH NNE IN 2005 TODAY'S REPORT PREPARED BY: Benjamin Turner