BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, FEBRUARY 1, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0657E SUNSET: 1659E SNOW STORM ARRIVES AS BLUE HILL CELEBRATES IT'S 136TH BIRTHDAY.... February 1st, 1885 the first observation at Blue Hill was taken and we haven't missed a day since! The endurance and continuity of this institution is one to be extremely proud of. All of us here at Blue Hill Observatory take great pride in continuing the legacy started by our founder, Abbott Lawrence Rotch, 136 years ago! The other big story is the storm system that is affecting much of the Mid Atlantic and Northeast. Snow began here at Blue Hill between 4-5 A.M. this morning with 0.3" measured at 7 A.M. Occasional light snow continued before becoming steady between noon and 1 P.M. An additional 0.1" was measured at 1 P.M. The wind has been increasing steadily through the morning into early this afternoon with a peak gust so far of 39 MPH. The high temperature so far today is 32F, this is 2 degrees below the daily normal maximum of 34F. The low since midnight is 22F, which is 5 degrees above the normal minimum of 17F. PRELIMINARY STATS FOR JANUARY 2021 TEMPERATURE, Deg. F Avg. Max. 35.4 [+1.6] Avg. Min. 22.5 [+5.4] Mean 28.9 [+3.4] 24-hour corrected mean: 28.8 Max. for month: 52F on the 16th Min. for month: 2F on the 31st HEATING DEGREE DAYS Total heating units: 1114 [-112] Total for the season: 3044 [-487] Total for last season: 3531 PRECIPITATION, Inches Total: 2.32 [-2.03] Greatest in 24 hrs: N/A SNOWFALL, Inches Total: 7.2 [-9.9] Greatest in 24 hrs: 16.5 ins. on the 16th-17th WIND, mph Avg. uncorrected wind speed: 11.1 mph Avg. corrected wind speed: 11.7 mph Prevailing wind direction: NW [25%] Peak gust and direction: 48 ESE on the 16th SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A Today's Observations: 7 A.M. Weather: Overcast stratocumulus, light snow, thin smoke layer all quadrants Temperature: 24F; Dew Point: 20F; Relative Humidity: 84% Wind: NNE @ 10G18 kts Sea-level pressure: 30.18 in Hg; falling unsteadily Visibility: 15 miles 6-hr Max temp: 26F 6-hr Min temp: 22F 24-hr Precip: 0.01 ins. 24-hr Snow: 0.3 ins. Snow Depth: 3 ins. BHO SA 1155 E20 OVC 15S- 220/24/20/0310G18/018/ PCPN VRY LGT THN K LYR ALQDS TOTAL NEW SNW PST 24 HRS 0.3 INS/ 8/5// 4/003 57014 6001/ 70001 10026 20022 10 A.M. Weather: Overcast stratocumulus, light snow Temperature: 31F; Dew Point: 25F; Relative Humidity: 78% Wind: ENE @ 16G28 kts, peak wind 32 MPH at 9:52 A.M. Sea-level pressure: 30.14 in Hg; falling, then more rapidly Visibility: 15 miles, 20 NW-NE, 8 E and SSW-WSW 3-hr Precip: Trace 3-hr Snow: Trace BHO SA 1455 E20 OVC 15S- 206/31/25/0716G28/014/ PCPN VRY LGT VSBY 20 NW-NE 8 E AND SSW-WSW S-B40 PK WND 0728/52/ 8/5// 58014 6000/ 1 P.M. Weather: Overcast stratocumulus, light snow Temperature: 32F, Dew point:28F; Relative Humidity: 85% Wind: ENE @ 21G32 kts, peak wind 37 MPH at 12:48 P.M. Sea-level pressure: 30.01 inches Hg, falling, then more rapidly Visibility: 3 miles, fog 6-hr Max temp: 32F 6-hr Min temp: 24F 6-hr Precip: 0.01 ins. 6-hr Snow: 0.1 ins. Snow Depth: 2 ins. BHO SA 1755 E27 OVC 3S-F 164/32/28/0721G32/001/ PK WND 0732/48/ TOTAL NEW SNW PST 6 HRS 0.1 INS/ 8/5// 4/003 58042 6001/ 10032 20024 SUMMARY FOR SUNDAY, JANUARY 31, 2021 TEMPERATURE (DEGREES F) MAX.......23 NORMAL.....34 MIN....... 2 NORMAL.....17 MEAN......13 NORMAL.....26 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL........-13 TOTAL DEPARTURE FOR THE MONTH...................+113 [+3.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............52 DEPARTURE......+12 TOTAL HEATING UNITS FOR THE MONTH.............1114 DEPARTURE.....-112 TOTAL HEATING UNITS FOR THE SEASON............3044 DEPARTURE.....-487 TOTAL HEATING UNITS LAST SEASON TO DATE.......3229 DEPARTURE.....-185 PEAK WIND GUST (MPH): 420C/Official..............18 NW @ 12:06 A.M. AEROVANE (south tower).....18 NW @ 12:11 A.M. ASOS.......................19 NW @ 12:13 A.M. DAVIS #1...................19 NW @ 12:13 A.M. DAVIS #2 (south tower).....18 NNW @ 12:12 A.M. RMY........................19 @ 12:12 A.M VECTOR.....................20 @ 12:12 A.M. MERLIN.....................N/A FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................14 NW @ 12:04 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................15 NNW @ 12:13 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............15 NNW @ 12:13 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............15 NNW @ 2:50 A.M. MAXIMUM 2-MINUTE RMY AVERAGE....................14 NNW @ 12:10 A.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................14 @ 12:11 A.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL.... 6.2 NW [148 total miles] ASOS................... 6.9 [166 total miles] DAVIS #1............... 7.4 NNE [178 total miles] DAVIS #2............... 7.2 NNE [173 total miles] RMY.................... 6.8 NE [163 total miles] VECTOR................. 7.4 [178 total miles] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.01 DEPARTURE....-0.12 ASOS.............0.02 TOTAL PRECIPITATION FOR THE MONTH.............0.01 DEPARTURE....-0.12 ASOS.............0.02 TOTAL PRECIPITATION FOR THE YEAR..............2.33 DEPARTURE....-2.02 ASOS............2.37 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........0.3 DEPARTURE.....-0.2 TOTAL SNOWFALL FOR THE MONTH.................. 0.3 DEPARTURE.....-0.2 TOTAL SNOWFALL FOR THE SEASON.................33.7 DEPARTURE.....+0.6 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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 01/01 36/25/31/+4/0.06/0.3/330/60 23 E AERO 23 NNW RMY 23 01/02 43/30/37/+10/0.30/T/116/21 37 WNW AERO 39 WNW RMY 44 01/03 33/27/30/+4/0.07/0.8/000/00 23 NNE AERO 22 NNE RMY 25 01/04 37/28/33/+7/0.01/0.1/110/20 25 NNE AERO 23 NNE RMY 27 01/05 31/28/30/+4/0.05/0.7/000/00 21 NNW AERO 21 NNW RMY 22 01/06 38/28/33/+7/T/T/244/44 30 NW AERO 29 NW RMY 32 01/07 42/26/34/+8/0.00/0.0/516/93 28 NNW AERO 26 NNW RMY 31 01/08 40/21/31/+5/0.00/0.0/517/93 25 NNW AERO 22 NNW RMY 25 01/09 34/30/27/+1/0.00/0.0/395/71 25 N AERO 23 N RMY 24 01/10 39/24/32/+7/0.00/0.0/493/88 25 NNW AERO 23 NNW RMY 24 01/11 34/25/30/+5/0.00/0.0/000/00 17 SW AERO 16 SSW RMY 16 01/12 40/24/32/+7/0.00/0.0/438/78 23 WNW AERO 23 WNW RMY 24 01/13 40/26/33/+8/0.00/0.0/389/69 15 SW AERO 14 SW RMY 19 01/14 38/31/35/+10/0.09/T/000/00 16 SSW AERO 16 SSW RMY 19 01/15 40/32/36/+11/0.00/0.0/266/47 25 ESE AERO 23 ESE RMY 27 TSTM 01/16 52/33/43/+18/1.00/0.0/000/00 48 ESE AERO 53 SE RMY 54 01/17 41/32/37/+12/0.00/0.0/314/55 47 W AERO 46 W RMY 54 01/18 42/27/35/+10/T/0.0/366/64 35 W AERO 37 WNW RMY 36 01/19 39/23/31/+6/T/T/293/51 25 WNW AERO 25 WNW RMY 27 01/20 37/22/30/+5/T/T/144/25 32 WNW AERO 33 WNW RMY 34 01/21 31/17/24/-1/T/0.1/081/14 23 WNW AERO 24 SSW RMY 24 01/22 42/29/36/+11/0.00/0.0/226/39 28 WNW AERO 24 WNW RMY 29 01/23 29/14/22/-3/0.00/0.0/442/76 41 WNW AERO 41 WNW RMY 46 01/24 29/13/21/-4/0.00/0.0/571/98 43 WNW AERO 48 WNW RMY 44 01/25 35/15/25/0/0.00/0.0/.../.. 28 NW AERO 29 NW RMY 30 01/26 36/20/28/+3/..../2.4/.../.. 18 E AERO 18 E RMY 20 01/27 33/27/30/+5/..../1.9/.../.. 16 NNW AERO 17 NNW RMY 17 01/28 29/13/21/-4/.../0.9/.../.. 39 NW AERO 48 NW RMY 42 01/29 15/4/10/-15/..../.../.../.. 44 NW AERO 46 NW RMY 50 01/30 19/3/11/-15/0.00/0.0/.../.. 24 NW AERO 28 NW RMY 27 01/31 23/2/13/-13/0.00/0.0/.../.. 18 NW AERO 18 NW RMY 19 02/01 The low since midnight is 22F, the daily normal low is 17F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR FEBRUARY 1 HIGH 65F IN 1989 LOW -9F IN 1920 PRECIP 1.30 INS. IN 1898 SNOWFALL 11.0 INS. IN 1898 PEAK GUST 66e MPH SSW IN 1951 RECORDS FOR FEBRUARY 2 HIGH 55F IN 1951, 1973 LOW -12F IN 1961 PRECIP 1.91 INS. IN 1999 SNOWFALL 16.5 INS. IN 2015 PEAK GUST 92 MPH SW IN 1970 TODAY'S REPORT PREPARED BY: Matt Douglas and Benjamin Turner