BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, MARCH 9, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME A NEAR TOP 10 DAY HERE ON THE SUMMIT OF BLUE HILL.... With the combination of bright sunshine and warm temperatures, today is a near top 10 type of day. The only caveat to this is the gusty SW-WSW wind here on the summit, which recently has been gusting to around 30mph. The temperature has reached 70 degrees as of our 1 P.M. EST observation. The record high for today is 75 degrees set in 2016, we are not likely to match or exceed this value today. Visibility has been decent all day at 60 miles. A lack of moisture in the air is attributing to a relatively clear air mass. The dew point has been in the upper teens all day, resulting in a paltry relative humidity of only 14% this afternoon.   On the season, the observatory is considerably dry to start the year in terms of precipitation. With an annual rain total of 4.82 inches, we are 4.99 inches below the normal amount. We continue to depart further from our normal seasonal snow total of 50.6 inches, being 25.5 inches below that amount to date. The high so far today is 70F, this is 28 degrees above the normal high of 42F. The low since midnight is 40F, this is 16 degrees above the normal low of 24F. Just a reminder, while most of the country observes Daylight Saving Time, here at Blue Hill Observatory we do not. As such, all times referred to within this discussion will be in Eastern Standard Time. 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: 7596 minutes of possible 17796 or 43% Astronomical total minutes: 7853 minutes of possible 18422 or 43% Today's Observations: 7 A.M. Weather: Thin scattered cirrus, few altostratus distant W-N-NE Temperature: 46F; Dew Point: 18F; Relative Humidity: 32% Wind: WSW at 12G17 kts Sea-level pressure: 30.29 ins. Hg: rising, then more slowly Visibility: 60 miles 6-hr Max temp: 46F 6-hr Min temp: 40F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 250 –SCT 60 258/46/18/2412G17/029/ FEW AS DSNT W-N-NE THN K LYR ALNG HRZN ALQDS/ 8/021 51008 10046 20040 10 A.M. Weather: Scattered cirrus, thin broken cirrus, few altocumulus distant NW-NE Temperature: 62F; Dew Point: 16F; Relative Humidity: 16% Wind: SW at 10G17 kts Sea-level pressure: 30.27 ins. Hg: rising, then falling Visibility: 60 miles 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 200 SCT 250 –BKN 60 251/62/16/2210G17/027/ FEW AC DSNT NW-NE/ 8/071 58007 1 P.M. Weather: Thin scattered cirrus Temperature: 70F; Dew Point: 19F; Relative Humidity: 14% Wind: SW at 13G23 kts Sea-level pressure: 30.19 ins. Hg: falling, then more rapidly Visibility: 60 miles 6-hr Max temp: 70F 6-hr Min temp: 46F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 250 –SCT 60 223/70/19/2313G23/019/ 8/001 58028 10070 20046 SUMMARY FOR SUNDAY, MARCH 8, 2020 TEMPERATURE (DEGREES F) MAX.....53   NORMAL.....42 MIN.....26   NORMAL.....24 MEAN....40   NORMAL.....33 DEPARTURE FROM 30-YEAR NORMAL....................+7 TOTAL DEPARTURE FOR THE MONTH...................+61 [+7.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............25  DEPARTURE........-7 TOTAL HEATING UNITS FOR THE MONTH..............203  DEPARTURE.......-61 TOTAL HEATING UNITS FOR THE SEASON............4343  DEPARTURE......-489 TOTAL HEATING UNITS LAST SEASON TO DATE.......4812  DEPARTURE......-469 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................31 W   AT   2:23 P.M.                      AERO.........................30 W   AT   2:23 P.M.                      ASOS.........................30 W   AT   2:36 P.M.                    DAVIS........................31 W   AT   2:22 P.M. RMY 28 FASTEST MILE FOR YESTERDAY......................24 W   AT   2:18 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................23 W   AT   2:24 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................25 W   AT   2:24 P.M. AVERAGE WIND SPEED AND DIRECTION..............11.7 W                                   ASOS.......................11.8                    DAVIS......................12.1 W [269 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..........0.16  DEPARTURE......-1.23                          ASOS..............0.19 TOTAL PRECIPITATION FOR THE YEAR...........4.82  DEPARTURE......-4.99                          ASOS..............5.10 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH................0.8  DEPARTURE.......-3.3 TOTAL SNOWFALL FOR THE SEASON..............25.6  DEPARTURE......-25.5 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/+7/0.00/0.0/274/41        51 W   AERO 53 W   RMY 52 02/28  36/25/31/0/0.00/0.0/596/89        38 SW  AERO 38 SW  RMY 36 02/29  35/19/27/-4/0.00/0.0/256/38        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/..../0.0/..../..       30 S   AERO 30 S   RMY N/A 03/04  50/38/44/+12/..../0.0/..../..       56 W   AERO 56 W   RMY 58 03/05  51/32/42/+10/0.00/0.0/..../..       31 W   AERO 31 NW  RMY 32 03/06  47/30/39/+7/..../.../..../..        46 NE  AERO 45 NE  RMY 46 03/07  43/26/35/+2/..../.../..../..        42 N   AERO 43 N   RMY 44 03/08  53/26/40/+7/0.00/0.0/..../..        31 W   AERO 30 W   RMY 28 03/09 The low since midnight is 40F, daily normal minimum is 24F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR MARCH 9 HIGH 75 IN 2016 LOW 1 IN 2007 PRECIP 2.67 INS. IN 1998 SNOWFALL 6.3 INS. IN 2013 PEAK GUST 102e MPH S IN 1942 [RECORD FOR MONTH] RECORDS FOR MARCH 10 HIGH 69 IN 1977 LOW 2 IN 1984 PRECIP 2.00 INS. IN 1994 SNOWFALL 4.0 INS. IN 1997 PEAK GUST 80 MPH NW IN 1974 TODAY'S REPORT PREPARED BY: Matt Douglas