BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, MARCH 6, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME MOSTLY CLEAR SKIES GIVE WAY TO INCREASING CLOUDINESS... We began the day enjoying tranquil conditions- partly cloudy skies, mild temperatures, and benign winds. Temperatures topped out at 48 degrees under the morning sun, but with overcast skies & easterly winds overtaking the region temperatures have fallen to 43 at 1PM. Visibility was limited in the morning to 50 miles, but increased to 80 miles by the early afternoon. Highest gust so far today is 26 MPH. Temperatures remain above normal, and both Ponkapoag and Houghton's Pond remain unfrozen. The high so far today is 48F, this is 7 degrees above the normal high of 41F. The low since midnight is 31F, 8 degrees above the normal low of 23F. PRELIMINARY STATS FOR FEBRUARY 2020 TEMPERATURE, Deg. F Avg. Max. 40.7 [+3.9] Avg. Min. 25.9 [+6.7] Mean 33.3 [+5.4] 24-hour corrected mean: 33.0 Max. for month: 60F on the 24th Min. for month: 4F on the 15th HEATING DEGREE DAYS Total heating units: 911 [-164] Total for the season: 4140 [-345] Total for last season: 4485 PRECIPITATION, Inches Total: 3.20 [-0.87] Greatest in 24 hrs: N/A SNOWFALL, Inches Total: 0.6 [-13.3] Greatest in 24 hrs: 0.5 ins. on the 13th WIND, mph Avg. uncorrected wind speed: 11.5 mph Avg. corrected wind speed: 12.0 mph Prevailing wind direction: W [24%] Peak gust and direction: 71 WSW on the 7th SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A Today's Observations: 7 A.M. Weather: Scattered Altocumulus with few cirrus Temperature: 35F; Dew Point: 30F; Relative Humidity: 81% Wind: S at 10 kts Sea-level pressure: 30.04 ins. Hg: falling unsteadily Visibility: 50 miles, distant fog 6-hr Max temp: 40F 6-hr Min temp: 31F 24-hr Precip: 0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 180 SCT 50 172/35/30/1710/004/ FEW CI ALQDS DSNT FG ALQDS/ 8/091 57005 10040 20031 10 A.M. Weather: Scattered Cirrostratus with few cumulus (N-NE), few altocumulus (S-SW), and few cirrus Temperature: 45F; Dew Point: 21F; Relative Humidity: 38% Wind: ESE at 6 kts Sea-level pressure: 30.02 ins. Hg: steady then falling Visibility: 65 miles 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 250 SCT 65 167/45/21/1106/002/ FEW CU N-NE FEW AC S-SW FEW CI ALQDS/ 8/191 58005 1 P.M. Weather: Overcast Altostratus, Few stratocumulus Temperature: 43F; Dew Point: 32F; Relative Humidity: 64% Wind: ENE at 15G20 kts Sea-level pressure: 29.92 ins. Hg: falling then more rapidly Visibility: 80 miles 6-hr Max temp: 48F 6-hr Min temp: 35F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 150 OVC 80 132/43/32/0715G20/992/ FEW SC ALQDS/ 8/41/ 58035 10048 20035 SUMMARY FOR THURSDAY, MARCH 5, 2020 TEMPERATURE (DEGREES F) MAX.....51 NORMAL.....41 MIN.....32 NORMAL.....23 MEAN....42 NORMAL.....32 DEPARTURE FROM 30-YEAR NORMAL...................+10 TOTAL DEPARTURE FOR THE MONTH...................+45 [+8.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............23 DEPARTURE.......-10 TOTAL HEATING UNITS FOR THE MONTH..............122 DEPARTURE.......-45 TOTAL HEATING UNITS FOR THE SEASON............4262 DEPARTURE......-473 TOTAL HEATING UNITS LAST SEASON TO DATE.......4673 DEPARTURE......-411 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................31 W AT 8:13 A.M. AERO.........................31 NW AT 10:22 A.M. ASOS.........................32 NW AT 10:41 A.M. DAVIS........................31 W AT 8:13 A.M. RMY 32 FASTEST MILE FOR YESTERDAY......................24 NW AT 9:34 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................23 NW AT 9:34 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................25 WNW AT 9:34 A.M. AVERAGE WIND SPEED AND DIRECTION..............11.3 W ASOS.......................10.4 DAVIS......................11.8 WNW [289 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.18 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.09 DEPARTURE......-0.78 ASOS..............0.11 TOTAL PRECIPITATION FOR THE YEAR...........4.75 DEPARTURE......-4.54 ASOS..............5.02 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH..............TRACE DEPARTURE.......-2.6 TOTAL SNOWFALL FOR THE SEASON..............24.8 DEPARTURE......-24.8 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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 02/01 38/30/34/+8/0.01/T/000/00 14 WSW AERO 14 WSW RMY N/A 02/02 40/30/35/+9/0.00/0.0/078/13 18 W AERO 18 WNW RMY 18 02/03 44/27/36/+10/0.00/0.0/260/43 28 W AERO 28 W RMY 28 02/04 44/33/39/+13/0.00/0.0/055/09 19 E AERO 16 E RMY 18 02/05 41/30/36/+10/0.00/0.0/000/00 20 NNW AERO 19 NNW RMY N/A 02/06 31/30/34/+8/0.00/0.0/000/00 29 E AERO 28 E RMY 27 02/07 53/25/39/+12/..../0.1/000/00 71 WSW AERO 71 SSW RMY 73 02/08 33/20/27/0/T/T/616/100 46 W AERO 44 W RMY 44 02/09 33/15/24/-3/T/T/303/49 30 SSE AERO 29 SSE RMY N/A 02/10 42/33/38/+11/..../0.0/000/00 39 SSW AERO 39 SSW RMY 39 02/11 40/36/38/+11/..../0.0/000/00 24 W AERO 23 W RMY N/A 02/12 41/30/36/+9/0.00/0.0/314/50 37 W AERO 36 W RMY N/A 02/13 35/31/34/+6/..../0.5/000/00 29 SSW AERO 29 SSW RMY N/A 02/14 33/8/21/-7/0.00/0.0/506/80 32 WNW AERO 32 NW RMY 34 02/15 27/4/16/-12/0.00/0.0/508/80 31 SSW AERO 31 SSW RMY N/A 02/16 40/23/32/+4/0.00/0.0/006/01 38 SW AERO 38 SW RMY N/A 02/17 44/28/36/+8/0.00/0.0/582/91 25 WNW AERO 24 WNW RMY 24 02/18 37/27/32/+3/0.31/T/000/00 26 SE AERO 26 SE RMY N/A 02/19 42/25/34/+5/0.00/0.0/530/82 45 W AERO 46 W RMY 44 02/20 31/18/25/-4/0.00/0.0/389/60 32 W AERO 32 W RMY N/A 02/21 30/11/21/-8/0.00/0.0/651/100 24 NNW AERO 21 N RMY N/A 02/22 44/23/34/+5/0.00/0.0/647/99 26 W AERO 24 W RMY 27 02/23 53/30/42/+12/0.00/0.0/636/97 21 SW AERO 22 WSW RMY 23 02/24 60/32/46/+16/0.00/0.0/606/92 29 S AERO 29 SSW RMY 31 02/25 53/40/47/+17/..../0.0/033/05 17 NE AERO 18 ENE RMY 17 02/26 45/39/42/+12/..../0.0/007/01 23 ENE AERO 24 E RMY N/A 02/27 49/27/38/+7/0.00/0.0/..../.. 51 W AERO 53 W RMY 52 02/28 36/25/31/0/0.00/0.0/..../... 38 SW AERO 38 SW RMY 36 02/29 35/19/27/-4/0.00/0.0/..../.. 32 W AERO 32 W RMY 34 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 33/15/24/-7/0.00/0.0/..../.. 28 WNW AERO 28 WNW RMY 27 03/02 52/24/38/+7/T/T/..../.. 40 S AERO 39 S RMY 41 03/03 64/45/55/+23/..../.../.../.. 30 S AERO 30 S RMY N/A 03/04 50/38/44/+12/..../.../.../.. 56 W AERO 56 W RMY 58 03/05 51/32/42/+10/.../.../.../.. 31 W AERO 31 NW RMY 32 03/06 The low since midnight is 31F, daily normal minimum is 23F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 6 HIGH 66 IN 1894 LOW 3 IN 1948, 2007 PRECIP 1.85 INS. IN 2001 SNOWFALL 15.5 INS. IN 2001 PEAK GUST 82 MPH S IN 1959 RECORDS FOR MARCH 7 HIGH 66 IN 1946 LOW -1 IN 1890 PRECIP 2.05 INS. IN 1967 SNOWFALL 11.5 INS. IN 2013 PEAK GUST 66 MPH NE IN 1962 TODAY'S REPORT PREPARED BY: Andrew Swanson