BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, MARCH 27, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0536E SUNSET: 1805E FAIR WEATHER WITH EXCELLENT VISIBILITY ATOP GREAT BLUE HILL.... Today we observed great weather with a persistent visibility of 85 miles. Wind is around 10 mph from the west with a max gust of 20 mph. Pressure has risen significantly overnight, and humidity is approaching 30% with a dew point below freezing. The drought monitor was updated yesterday. Our spring precipitation deficit has left us and much of MA in abnormally dry conditions. While this is not much cause for alarm, it does mean elevated fire risk on windy, dry days. Computer models are indicating, however, a chance of a good soaking rain on Sunday. While not ideal to have this over the weekend of course, it will make a beneficial impact on vegetation and reservoirs, and will calm the fire danger. -Drought monitor section by Andrew Swanson Much warmer than normal weather continues to exist throughout much of the region. The high so far today is 61F, which is 13 degrees above the normal high of 48F. The low since midnight is 42F, which is 12 degrees above the daily normal low of 30F. Tours are available from 10 A.M. to 4 P.M. on Friday, Saturday, Sunday and Monday! Today's Observations: 7 A.M. Weather: Clear, few distant cumulus NW-N Temperature: 46F; Dew Point: 36F; Relative Humidity: 68% Wind: WNW @ 8 kts Sea-level pressure: 30.06 in Hg; rising, then more rapidly Visibility: 85 miles 6-hr Max temp: 46F 6-hr Min temp: 42F 24-hr Precip: 0.00 ins. 24-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 CLR 85 181/46/36/2908/006/ FEW DSNT CU NW-N/ 8/100 53038 10046 20042 10 A.M. Weather: Clear, few distant cumulus and altostratus NW-NE Temperature: 52F; Dew Point: 34F; Relative Humidity: 49% Wind: NW @ 7 kts Sea-level pressure: 30.01 in Hg; falling then rising Visibility: 85 miles 3-hr Precip: 0.00 ins 3-hr Snow: 0.0 ins. BHO SA 1455 CLR 85 165/52/34/3107/001/ FEW DSNT CU/AS NW-NE/ 8/170 50016 1 P.M. Weather: Few cumulus Temperature: 59F, Dew point: 30F; Relative Humidity: 32% Wind: N @ 4 kts, light and variable Sea-level pressure: 30.09 in Hg; rising then falling Visibility: 85 miles 6-hr Max temp: 61F 6-hr Min temp: 46F 6-hr Precip: 0.00 ins. 6-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1755 CLR 85 189/59/30/3504/009/ FEW CU/CI ALQDS/ 8/101 55008 10061 20046 SUMMARY FOR FRIDAY, MARCH 26, 2021 TEMPERATURE (DEGREES F) MAX.......63 NORMAL.....48 MIN.......48 NORMAL.....30 MEAN......56 NORMAL.....39 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL....... +17 TOTAL DEPARTURE FOR THE MONTH................... +78 [+3.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY................9 DEPARTURE......-17 TOTAL HEATING UNITS FOR THE MONTH..............694 DEPARTURE......-96 TOTAL HEATING UNITS FOR THE SEASON............4739 DEPARTURE.....-618 TOTAL HEATING UNITS LAST SEASON TO DATE.......4757 DEPARTURE......-18 PEAK WIND GUST (MPH): 420C/Official..............58 W @ 9:49 P.M. AEROVANE (south tower).....67 W @ 9:49 P.M. ASOS.......................56 W @ 9:51 P.M. DAVIS #1...................60 W @ 9:51 P.M. DAVIS #2 (south tower).....56 WNW @ 9:52 P.M. RMY........................63 @ 9:50 P.M. VECTOR.....................65 @ 9:51 P.M. MERLIN.....................55 FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................40 W @ 9:53 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................39 W @ 9:52 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............44 W @ 9:53 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............41 WNW @ 8:59 P.M. MAXIMUM 2-MINUTE RMY AVERAGE....................37 WNW @ 9:50 P.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................40 @ 9:50 P.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL......20.3 S [488 total miles] ASOS.....................19.7 DAVIS #1.................19.2 SW DAVIS #2.................20.8 SW RMY......................19.5 SSW VECTOR...................20.2 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00 DEPARTURE....-0.19 ASOS.............0.00 TOTAL PRECIPITATION FOR THE MONTH.............1.06 DEPARTURE....-3.61 ASOS.............1.09 TOTAL PRECIPITATION FOR THE YEAR..............9.06 DEPARTURE....-4.03 ASOS............9.35 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M.......... 0.0 DEPARTURE.... -0.3 TOTAL SNOWFALL FOR THE MONTH.................. 0.2 DEPARTURE....-11.1 TOTAL SNOWFALL FOR THE SEASON.................72.6 DEPARTURE....+14.8 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 42/24/33/+2/0.13/T/020/03 69 WNW AERO 78 WNW RMY 78 03/02 27/10/19/-12/T/0.1/679/100 63 WNW AERO 71 WNW RMY 69 03/03 45/19/32/0/0.00/0.0/375/55 30 W AERO 30 W RMY 34 03/04 38/22/30/-2/0.00/0.0/520/76 46 NW AERO 51 NW RMY 53 03/05 31/18/25/-7/0.00/0.0/549/80 39 WNW AERO 44 NW RMY 45 03/06 33/15/24/-8/0.00/0.0/675/98 28 WNW AERO 29 WNW RMY 30 03/07 35/15/25/-8/0.00/0.0/686/99 21 NW AERO 22 NW RMY 23 03/08 38/19/29/-4/T/T/389/56 20 NW AERO 20 NW RMY 21 03/09 56/30/43/+10/T/T/.../.. 32 WNW AERO 35 WNW RMY 37 03/10 54/32/43/+10/0.00/0.0/.../.. 29 SSW AERO 29 SSW RMY 31 03/11 71/35/53/+19/0.00/0.0/.../.. 41 SSW AERO 43 SSW RMY 46 03/12 62/42/52/+18/0.00/0.0/.../.. 52 WNW AERO 59 WNW RMY 57 03/13 46/27/37/+3/0.00/0.0/.../.. 53 WNW AERO 59 WNW RMY 57 03/14 45/19/32/-3/0.01/0.1/.../.. 51 WNW AERO 58 NW RMY 58 03/15 27/12/20/-15/0.00/0.0/.../.. 48 NW AERO 47 NW RMY 54 03/16 37/13/25/-10/0.00/0.0/.../.. 22 NNW AERO 22 NNW RMY 23 03/17 52/27/40/+4/0.00/0.0/.../.. 28 S AERO 25 S RMY 29 03/18 46/34/40/+4/0.80/T/.../.. 38 NE AERO 40 NE RMY 42 03/19 39/26/33/-3/T/T/.../.. 37 N AERO 38 N RMY 41 03/20 58/24/41/+4/0.00/0.0/.../.. 23 W AERO 23 W RMY 27 03/21 62/39/51/+14/0.00/0.0/.../.. 22 S AERO 23 S RMY 25 03/22 62/36/49/+12/0.00/0.0/.../.. 21 S AERO 18 S RMY 22 03/23 65/38/52/+14/0.00/0.0/.../.. 22 ESE AERO 18 SE RMY 21 03/24 63/44/54/+16/..../0.0/.../.. 22 SSE AERO 21 SSE RMY 21 03/25 67/49/58/+20/0.11/0.0/.../.. 25 S AERO 26 S RMY 26 03/26 63/48/56/+17/0.01/0.0/.../.. 58 W AERO 67 W RMY 63 03/27 The low since midnight is 42F, the daily normal low is 30F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR MARCH 27 HIGH 78 IN 1998 LOW 12 IN 1975 PRECIP 1.05 INS. IN 1913 SNOWFALL 6.6 INS. IN 1959 PEAK GUST 62 MPH NW IN 1965, SE IN 1992 RECORDS FOR MARCH 28 HIGH 86 IN 1998 LOW 7 IN 1923 PRECIP 2.31 INS. IN 1932 SNOWFALL 5.0 INS. IN 2015 PEAK GUST 60e MPH NW IN 1944, 60 WSW IN 1991 TODAY'S REPORT PREPARED BY: Benjamin Turner