BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, APRIL 12, 2018   ALL TIMES ARE IN EASTERN STANDARD TIME ABOVE SEASONABLE TEMPERATURES RETURN WITH DRY  AND HAZY CONDITIONS... Above seasonable temperatures finally returned after a generally below seasonable start to April. So far temperatures have been close to 6 degrees below normal this month. Today we reached a max so far of 59F, which is already 5 degrees above the daily normal of 54F. The day began below seasonable with an overnight low of 33F. This is 3 degrees below the daily normal of 36F.  Wind from the south has remained light this morning but  picked up in the afternoon with a peak gust of 22 kts  (25 MPH) by 1:00 P.M. Clouds increased today as  pressure began dropping. Visibility was limited all day  to 40 miles due to a lingering distant haze.   Today's Observations: 7 A.M. Weather: Sky clear   Temperature: 38F; Dew Point: 32F; Wind: WSW at 7 kts Sea-level pressure: 30.12 ins. Hg, rising, then more rapidly      Visibility: 40 miles, distant haze in all directions   6-hr Max temp: 38F 6-hr Min temp: 33F 24-hr precip: Trace 24-hr snowfall: 0.0 ins.   Snow depth: 0 ins. BHO SA 1155 CLR 40 201/38/32/2407/012/ SKC DSNT HZ ALQDS/  53016 10038 20033 10 A.M. Weather: Scattered cirrus, few cumulus N-SSE, Small fire 5 miles SSW, smoke plume drifting SSE Temperature: 50F; Dew Point: 28F; Wind: SW at 5 kts, Wind: Light   Sea-level pressure: 30.12 ins. Hg, falling steadily  Visibility: 40 miles, distant haze in all directions 3-hr precip: 0.00 ins.   3-hr snowfall: 0.0 ins.  BHO SA 1455 250 SCT 40 201/50/28/2305/012/ FEW CU N-SSE  FIRE SSW 5 MI SML K PLUME DRFTNG SSE WND LGT/ 8/101 58000  1 P.M. Weather: Scattered cumulus, broken cirrostratus, sun dimly visible  Temperature: 59F; Dew Point: 26F; Wind: WSW at 7 kts Sea-level pressure: 30.03 ins. Hg, falling, then more slowly Visibility: 40 miles, distant haze in all directions 6-hr Max temp: 59F 6-hr Min temp: 38F 6-hr precip: 0.00 ins. 6-hr snowfall: 0.0 ins.  Snow depth: 0 ins. BHO SA 1755 50 SCT E250 BKN 171/59/26/2407G16/003/  DSNT HZ ALQDS SUN DMLY VSBL/ 8/106 58030 10059 20038 SUMMARY FOR WEDNESDAY, APRIL 11, 2018 TEMPERATURE (DEGREES F) MAX.....48   NORMAL.....54 MIN.....29   NORMAL.....36 MEAN....39   NORMAL.....45 DEPARTURE FROM 30-YEAR NORMAL...........................-6 TOTAL DEPARTURE FOR THE MONTH..........................-59 [-5.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY.............26   DEPARTURE..........+6 TOTAL HEATING UNITS FOR THE MONTH............301   DEPARTURE.........+59 TOTAL HEATING UNITS FOR THE SEASON..........5359   DEPARTURE........-367 TOTAL HEATING UNITS LAST SEASON TO DATE.....5108   DIFFERENCE.......+251 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................24 SSE AT 6:07 P.M.                      AERO........................23 SSE AT 6:34 P.M.                    ASOS........................24 S   AT 6:07 P.M.                    DAVIS.......................24 M   AT 6:05 P.M ** RMY 25 FASTEST MILE FOR YESTERDAY.....................19 SSE AT 6:33 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................18 S   AT 6:35 P.M.   MAXIMUM 2-MINUTE DAVIS AVERAGE.................19 M   AT 6:34 P.M.** AVERAGE WIND SPEED AND DIRECTION..............7.7 SSE                    ASOS.......................7.8                    DAVIS......................7.7 M** ** Davis direction malfunctioning  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..........1.13  DEPARTURE......-0.74                          ASOS..............0.97   TOTAL PRECIPITATION FOR THE YEAR..........19.93  DEPARTURE......+4.24                          ASOS.............21.06 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.2 TOTAL SNOWFALL FOR THE MONTH................2.6  DEPARTURE........+0.8 TOTAL SNOWFALL FOR THE SEASON..............92.8  DEPARTURE.......+31.2 PRELIMINARY CLIMATE SUMMARY FOR APRIL 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 4/01 58/33/46/+5/..../0.0/336/44   45 SSW AERO 43 SSW RMY N/A   4/02 38/30/34/-7/..../1.6/077/10   20 SSW AERO 15 SSW RMY 17 4/03 48/30/39/-3/..../0.0/.../..   28 SSE AERO 25 SSE RMY 25 4/04 54/36/45/+3/..../0.0/.../..   56 WNW AERO 56 WNW RMY 54 4/05 40/27/34/-9/0.00/0.0/.../..   53 WNW AERO 53 WNW RMY 52  4/06 41/25/33/-10/0.25/1.0/.../..  37 S   AERO 36 S   RMY 38 4/07 46/32/35/-4/0.00/0.0/.../..   32 WNW AERO 35 WNW RMY 34 4/08 41/29/35/-9/0.00/0.0/.../..   35 WNW*AERO 31 WNW RMY 34 4/09 45/24/35/-9/0.00/0.0/.../..   28 WNW*AERO 25 WNW RMY 29 4/10 39/31/35/-10/T/T/.../..       14 SSW AERO 13 SSW RMY N/A 4/11 48/29/39/-6/T/0.0/.../..      24 SSE AERO 23 SSE RMY 25  4/11 Low temp since midnight is 29F; normal low is now 36F *Estimated DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):     RECORDS FOR APRIL 12 HIGH 82 IN 1945 LOW 17 IN 1926 PRECIP 1.51 IN. IN 1993 SNOWFALL 12.0 IN. IN 1894 PEAK GUST 65e MPH W IN 1978 RECORDS FOR APRIL 13 HIGH 85 IN 1945 LOW 22 IN 1939 PRECIP 2.51 IN. IN 2004 SNOWFALL 6.8 IN. IN 1933 PEAK GUST 59 MPH SSW IN 1995 TODAY'S REPORT PREPARED BY: K.A. Geagan