BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, MAY 2, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME FOGGY THROUGHOUT THE DAY WITH MINIMAL  VISIBILITY.... Fog limited visibility to only 1/16 miles today. Wind was 10 mph on average from the northeast,  with a max gust so far of 21 mph. A light drizzle was observed shortly following noontime, and has continued past the 1 P.M. observation. The high  so far today is 45F, 17 degrees below the daily normal  maximum of 62F. The low since midnight is 42F, a  degree below the daily normal of 43F.  BHO Greatest April Precipitation, inches (1886-2019): 1) 10.37 in 1987 2)  9.38 in 2004 3)  8.71 in 1929 4)  8.68 in 2007 5)  8.53 in 1904 6)  8.14 in 2019 7)  7.57 in 1935     7.57 in 1983 9)  7.31 in 1901 The calendar day rainfall on Monday, 4/22, was more than two and a half inches, which made it one of the wettest calendar days ever observed in April. The finalized amount for the day will be reported when available.   BHO Greatest April Calendar Day Precipitation, inches (1886-2019): 1) 3.47 on April 1,  2004 2) 3.18 on April 21, 1991 3) 2.63 on April 16, 2018 4) 2.51 on April 24, 1898    2.51 on April 13, 2004 6) 2.45 on April 16, 1929 7) 2.41 on April 28, 1904 8) 2.40 on April 10, 1935 Today's Observations: 7 A.M. Weather: Fog Temperature: 44F; Dew Point: 44F; Wind: NE at 9G12 kts Sea-level pressure: 30.19 ins. Hg, rising steadily Visibility: 1/16th mile, fog 6-hr Max temp: 45F 6-hr Min temp: 44F 24-hr Precip: 0.01 ins.  24-hr snowfall: 0.0 ins. Snow depth: 0 ins.  BHO SA 1155 W3 X 1/16F 222/44/44/0409G12/019/ 8//// 70001  53018 10045 20044 10 A.M. Weather: Fog Temperature: 43F; Dew Point: 43F; Wind: NE at 8G16 kts Sea-level pressure: 30.17 ins. Hg, rising steadily Visibility: 1/16 mile, fog 3-hr Precip: 0.00 ins.  BHO SA 1455 W3 X 1/16F 218/43/43/0508G16/017/ 8//// 50004  1 P.M. Weather: Fog, light drizzle Temperature: 42F; Dew Point: 42F; Wind: E at 9G18 kts Sea-level pressure: 30.13 ins. Hg, rising steadily Visibility: 1/16 mile, fog 6-hr Max temp: 45F 6-hr Min temp: 42F 6-hr Precip:  Trace 6-hr snowfall: 0.0 ins.  BHO SA 1755 W3 X 1/16L-F 206/42/42/0709G18/013/ L-CTD/  8//// 600// 50012 10045 20042  SUMMARY FOR WEDNESDAY, MAY 1, 2019  TEMPERATURE (DEGREES F) MAX.....57   NORMAL.....62 MIN.....40   NORMAL.....43 MEAN....49   NORMAL.....53 DEPARTURE FROM 30-YEAR NORMAL........................-4 TOTAL DEPARTURE FOR THE MONTH........................-4 [-4.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............16   DEPARTURE.........+4 TOTAL HEATING UNITS FOR THE MONTH..............16   DEPARTURE..........3 TOTAL HEATING UNITS FOR THE SEASON...........5917   DEPARTURE.......-130 TOTAL HEATING UNITS LAST SEASON TO DATE......5706   DIFFERENCE......+211 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................21 S   AT 11:26 P.M.                    AERO.........................21 SSE AT  8:52 P.M.                    ASOS.........................21 S   AT  3:30 P.M.                     DAVIS........................21 S   AT  3:30 P.M.  RMY 21 FASTEST MILE FOR YESTERDAY......................16 NW  AT 11:30 P.M.  MAXIMUM 2-MINUTE ASOS AVERAGE...................17 S   AT 11:53 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 SSE AT 11:53 P.M. AVERAGE WIND SPEED AND DIRECTION...............7.4 S                    ASOS........................7.8                    DAVIS.......................7.9 S [191 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01  DEPARTURE.......-0.11                          ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........0.01  DEPARTURE.......-0.11                          ASOS..............0.01 TOTAL PRECIPITATION FOR THE YEAR..........21.19  DEPARTURE.......+2.52                          ASOS.............21.22 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0  DEPARTURE.........0.0 TOTAL SNOWFALL FOR THE MONTH...............0.0  DEPARTURE.........0.0 TOTAL SNOWFALL FOR THE SEASON.............47.6  DEPARTURE.......-15.1 PRELIMINARY CLIMATE SUMMARY FOR APRIL 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/-4/0.00/0.0/748/98           40 WNW AERO 37 W   RMY 42 04/02 50/27/39/-2/..../0.0/605/79           29 S   AERO 25 S   RMY 31 04/03 62/35/49/+7/..../0.0/484/63           54 W   AERO 58 W   RMY 56 04/04 50/34/42/0/..../0.0/717/93            46 W   AERO 41 W   RMY N/A 04/05 47/27/37/-6/..../0.0/341/44           23 SSW AERO 17 SSW RMY 23 04/06 64/32/48/+5/..../0.0/536/69           24 NW  AERO 18 W   RMY 26 04/07 66/41/54/+11/0.00/0.0/320/41          24 S   AERO 18 S   RMY 25 04/08 48/34/41/-3/0.49/0.0/000/00           25 NE  AERO 20 NE  RMY 26 04/09 40/32/36/-8/0.08/0.0/000/00           23 NE  AERO 16 N   RMY 25 04/10 43/30/37/-8/T/T/000/00                32 NW  AERO 26 NW  RMY 36 04/11 51/29/40/-5/0.00/0.0/403/51           23 NW  AERO 18 NW  RMY N/A 04/12 53/38/46/+1/..../0.0/000/00           35 SSW AERO 29 SSW RMY 39 04/13 71/54/63/+17/..../0.0/167/21          38 SSW AERO 32 SSW RMY N/A 04/14 71/51/61/+15/..../0.0/224/28          25 S   AERO 18 S   RMY N/A 04/15 67/40/54/+7/..../0.0/168/21           46 W   AERO 52 W   RMY 50 04/16 58/37/48/+1/0.00/0.0/.../..           46 W   AERO 44 W   RMY 44  04/17 62/36/49/+2/0.00/0.0/.../..           26 ESE AERO 25 S   RMY 28 04/18 63/39/51/+3/0.00/0.0/.../..           44 S   AERO 44 S   RMY 50 04/19 71/58/65/+17/..../0.0/.../..          47 SSW AERO 51 SSW RMY 52 04/20 68/60/64/+15/..../0.0/.../..          50 SSW AERO 54 SSW RMY 52 04/21 68/51/60/+11/..../0.0/.../..          35 S   AERO 35 S   RMY N/A 04/22 53/45/49/0/..../0.0/.../..            35 NNE AERO 32 NNE RMY 35 04/23 52/44/48/-2/..../0.0/.../..           30 NNE AERO 26 NNE RMY N/A 04/24 65/44/55/+5/..../0.0/.../..           29 WNW AERO 29 WNW RMY 30 04/25 61/39/50/0/0.00/0.0/.../..            22 S   AERO 22 S   RMY 21  04/26 53/42/48/-3/..../0.0/.../..           35 ESE AERO 30 W   RMY 33 04/27 54/39/47/-4/..../.../.../..           41 W   AERO 44 W   RMY 47 04/28 51/38/45/-7/0.08/0.0/.../..           28 W   AERO 28 W   RMY N/A 04/29 60/34/47/-5/0.00/0.0/.../..           23 NW  AERO 24 WNW RMY 24 04/30 48/40/44/-8/0.17/0.0/.../..           26 NW  AERO 23 NW  RMY 25 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 Low temp since midnight is 42F; normal low is 44F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 2 HIGH 92F IN 2001 LOW 29F IN 1903 PRECIP 1.36 INCHES IN 2006 SNOWFALL 1.0 INS IN 1888 PEAK GUST 58 MPH S IN 1983 RECORDS FOR MAY 3 HIGH 92F IN 2001 LOW 31F IN 1888 PRECIP 2.25 INS IN 1900 SNOWFALL TRACE IN 1908, 1985 PEAK GUST 71 MPH W IN 2002 TODAY'S REPORT PREPARED BY: Benjamin Turner