BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, MARCH 12, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME CLEAR SKIES INTO EARLY AFTERNOON WITH GUSTY WESTERLY WINDS Yesterday's high temperature of 20F tied the previous record of low maximum temperature set in 1885.  Despite very cold conditions, no minimum temperature records have been broken during this cold spell.  Yesterday's average temperature of 14F was 20F below normal. The cold conditions continued today with an overnight minimum of 4F.  Temperatures had risen to 23F by the 1:00PM EST ob. Skies started completely clear of clouds but began to fill with few cirrus throughout the day.  Visibility held at 40 miles due to hazy conditions. Moderate wind gusts made the day feel even colder.  Westerly winds were consistently gusting up to 30 MPH through the early afternoon. Today's Observations: 7 A.M. Weather: Clear Temperature: 6F; Dew Point: -4F; Wind: WNW at 8 kts Sea-level pressure: 30.19 ins. Hg, rising, then more quickly Visibility: 40 miles, distant haze 6-hr Max temp: 9F 6-hr Min temp: 4F 24-hr precip: 0.00 in. 24-hr snowfall: 0.0 in. BHO SA 1155 CLR 40 223/06/M4/3008/019/ SKC DSNT HZ/ 4/002 53006 10009 20004 10 A.M. Weather: Few cirrus SW Temperature: 15F; Dew Point: -5F; Wind: W at 14G21 kts Sea-level pressure: 30.16 ins. Hg, steady, then falling Visibility: 40 miles, distant haze BHO SA 1455 CLR 40 214/15/M5/2814G21/016/ FEW CI SW DSNT HZ/ 8/001 58009 1 P.M. Weather: Few cirrus SW-NW Temperature: 22F; Dew Point: 2F; Wind: W at 14G22 kts, Peak Wind: 26 kts (30 MPH) W at 12:34 A.M. EST Sea-level pressure: 30.13 ins. Hg, falling, then more quickly Visibility: 40 miles, distant haze 6-hr Max temp: 23F 6-hr Min temp:  6F BHO SA 1755 CLR 40 204/22/02/2714G22/013/ FEW CI SW-NW DSNT HZ PK WND 2726/34/ 8/001 4/002 58010 10023 20006 SUMMARY FOR SATURDAY, MARCH 11, 2017   TEMPERATURE (DEGREES F) MAX.....20   NORMAL.....43 MIN......7   NORMAL.....25 MEAN....14   NORMAL.....34 DEPARTURE FROM 30-YEAR NORMAL........................-20 TOTAL DEPARTURE FOR THE MONTH.........................-5 [-0.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............51   DEPARTURE.........+20 TOTAL HEATING UNITS FOR THE MONTH.............364   DEPARTURE..........+5 TOTAL HEATING UNITS FOR THE SEASON...........4241   DEPARTURE........-686 TOTAL HEATING UNITS LAST SEASON TO DATE......3965   DIFFERENCE.......+276 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................43 W   AT 1:46 P.M.   AERO........................47 W   AT 4:00 P.M.                     ASOS........................47 W   AT 4:01 P.M.                    DAVIS.......................47 WNW AT 4:01 P.M. RMY 50 FASTEST MILE FOR YESTERDAY.....................35 W   AT 4:01 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................33 W   AT 4:02 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................34 WNW AT 4:02 P.M. AVERAGE WIND SPEED AND DIRECTION.............20.7 WNW                    ASOS......................20.7                    DAVIS.....................18.6 NW [310 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.17                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.36  DEPARTURE......-1.56                          ASOS..............0.40 TOTAL PRECIPITATION FOR THE YEAR...........9.64  DEPARTURE......-0.70                          ASOS...............N/A *** *** ASOS annual total not available due to erroneous readings SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH................3.1  DEPARTURE.......-2.5 TOTAL SNOWFALL FOR THE SEASON..............55.4  DEPARTURE.......+2.8 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 3/1  61/46/54/+23/0.01/0.0/.../..          41 S   AERO 45 S   RMY 45 3/2  55/26/41/+10/T/T/.../..               58 W   AERO 61 W   RMY 59  3/3  36/19/28/-4/T/T/.../..                38 W   AERO 44 W   RMY N/A 3/4  20/7/14/-18/T/T/.../..                45 NW  AERO 48 NW  RMY 51 3/5  29/5/17/-15/0.00/0.0/.../..           35 WNW AERO 43 WNW*RMY N/A 3/6  40/11/26/-6/0.00/0.0/.../..           18 WNW AERO 17 NW* RMY N/A 3/7  47/29/38/+5/0.01/0.0/.../..           32 S   AERO 35 S   RMY 36  3/8  55/43/49/+16/0.05/0.0/.../..          35 W   AERO 36 W   RMY 37 3/9  49/35/42/+9/0.0/0.0/.../..            53 W   AERO 59 W   RMY 58  3/10 35/20/28/-5/..../.../.../..           35 WNW AERO 44 WNW RMY 40 3/11 20/7/14/-20/..../.../.../..           43 W   AERO 47 W   RMY 50 3/12  Low temp since midnight is 4F; normal low is now 25F DAILY RECORDS FOR MARCH 2017 3/11/17: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 20F,          TIES PREVIOUS RECORD SET IN 1885 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 12 HIGH 72 IN 2012 LOW 2 IN 1885 PRECIP 2.87 INS. IN 1888 SNOWFALL 9.7 INS. IN 1959 PEAK GUST 66 MPH SE IN 1962 RECORDS FOR MARCH 13 HIGH 72 IN 1990 LOW -1 IN 1885 PRECIP 2.47 INS. IN 1993 SNOWFALL 10.0 INS. IN 1993 PEAK GUST 76 MPH ENE IN 1993 [THE "STORM OF THE CENTURY"] TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle