BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, MARCH 13, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME CIRRUS CLOUDS MOVE IN AHEAD OF STORM Skies were mostly clear again this morning but were partly cloudy by early afternoon with scattered cirrus. Wind direction began to shift south-southwest in the late morning as wind speeds dropped yielding light winds by the 1:00PM EST observation. Temperatures have been slightly warmer today but still remain colder than normal. Yesterday's average temp. of 15F was 19F below average. The max. so far today is 29F. Today's Observations: 7 A.M. Weather: Few cirrus NE-SW Temperature: 12F; Dew Point: -1F; Wind: WNW at 10G17 kts Sea-level pressure: 30.42 ins. Hg, rising, then more slowly Visibility: 60 miles 6-hr Max temp: 13F 6-hr Min temp:  8F 24-hr precip: 0.00 in. 24-hr snowfall: 0.0 in. BHO SA 1155 CLR 60 303/12/M1/2910G17/042/ FEW CI NE-SW 8/001 4/002 51023 10013 20008 10 A.M. Weather: Few cirrus in all directions Temperature: 20F; Dew Point: -1F; Wind: W at 8 kts Sea-level pressure: 30.46 ins. Hg, falling then rising Visibility: 70 miles BHO SA 1455 CLR 70 315/20/M1/2808/046/ FEW CI ALQDS/ 8/001 53012 1 P.M. Weather: Scattered cirrus Temperature: 29F; Dew Point: 3F; Wind: SSW at 5 kts, Wind Speed: Light Sea-level pressure: 30.41 ins. Hg, falling, then more quickly Visibility: 70 miles 6-hr Max temp: 29F 6-hr Min temp: 11F BHO SA 1755 250 SCT 70 297/29/03/2105/041/ WND LGT/ 8/001 4/001 58018 10029 20011 SUMMARY FOR SUNDAY, MARCH 12, 2017   TEMPERATURE (DEGREES F) MAX.....25   NORMAL.....43 MIN......4   NORMAL.....25 MEAN....15   NORMAL.....34 DEPARTURE FROM 30-YEAR NORMAL........................-19 TOTAL DEPARTURE FOR THE MONTH........................-24 [-2.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............50   DEPARTURE.........+19 TOTAL HEATING UNITS FOR THE MONTH.............414   DEPARTURE.........+24 TOTAL HEATING UNITS FOR THE SEASON...........4291   DEPARTURE........-667 TOTAL HEATING UNITS LAST SEASON TO DATE......3985   DIFFERENCE.......+306 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................32 W   AT  2:41 P.M.   AERO........................40 WNW AT 12:29 A.M.                     ASOS........................38 NW  AT 12:30 A.M.                    DAVIS.......................36 NW  AT 12:30 A.M. RMY N/A FASTEST MILE FOR YESTERDAY.....................24 W   AT  5:49 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................24 W   AT  5:50 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................23 NW  AT  2:43 P.M. AVERAGE WIND SPEED AND DIRECTION.............16.0 W                    ASOS......................16.0                    DAVIS.....................14.3 NW [310 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.16                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.36  DEPARTURE......-1.72                          ASOS..............0.40 TOTAL PRECIPITATION FOR THE YEAR...........9.64  DEPARTURE......-0.86                          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.......-0.4 TOTAL SNOWFALL FOR THE MONTH................3.1  DEPARTURE.......-2.9 TOTAL SNOWFALL FOR THE SEASON..............55.4  DEPARTURE.......+2.4 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 25/4/15/-19/0.00/0.0/.../..           32 W   AERO 40 WNW RMY N/A 3/13  Low temp since midnight is 8F; normal low is now 26F 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 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"] RECORDS FOR MARCH 14 HIGH 74 IN 1946 LOW 8 IN 1926 PRECIP 4.95 INS. IN 2010  SNOWFALL 6.7 INS. IN 1958 PEAK GUST 67 MPH ENE IN 2010 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle