BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, APRIL 29, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME WARM AND CLOUDY DAY AT GREAT BLUE HILL Temperatures today have continued to be well above normal. Today's maximum temperature before the 1:00 P.M. EST observation was 81F, which is currently the same as yesterday's maximum temperature. Relative humidity remained in the 40%s. Pressure fell as wind speeds began to pick up out of the southwest. It was cloudy all day with mostly altocumulus and altostratus clouds. The sun was able to shine a little bit through some small breaks. Visibility stayed only around 40 miles because of haze in the area all day. Today's Observations: 7 A.M. Weather: Broken altocumulus, overcast altostratus Temperature: 67F; Dew Point: 49F; Wind: SW at 9G14 kts Sea-level pressure: 29.99 ins. Hg, falling, then rising Visibility: 30 miles, hazy 6-hr Max temp: 67F 6-hr Min temp: 61F 24-hr precip: 0.00 in. 24-hr snowfall: 0.0 in. BHO SA 1155 E90 BKN 120 OVC 30 155/67/49/2209G14/999/ HAZY/ 8/07/  55009 10067 20061 10 A.M. Weather: Scattered altocumulus, broken altostratus Temperature: 77F; Dew Point: 54F; Wind: SW at 11G18 kts Sea-level pressure: 29.95 ins. Hg, falling, then more quickly  Visibility: 40 miles, distant haze 3-hr precip: 0.00 in. 3-hr snowfall: 0.0 in. BHO SA 1455 90 SCT E120 BKN 40 141/77/54/2311G18/995/ DSNT HZ ALQDS/ 8/070 58014 1 P.M. Weather: Few cumulus in all directions, scattered altocumulus, broken  altostratus, broken cirrus Temperature: 80F; Dew Point: 57F; Wind: WSW 16G23 kts Sea-level pressure: 29.85 ins. Hg, falling, then more quickly Visibility: 40 miles, distant haze 6-hr Max temp: 81F 6-hr Min temp: 66F 6-hr precip: 0.00 in. 6-hr snowfall: 0.0 in. BHO SA 1755 90 SCT E220 BKN 300 BKN 40 109/80/57/2416G23/985/ FEW CU ALQDS DSNT HZ ALQDS/ 8/171 56032 10081 20066 SUMMARY FOR FRIDAY, APRIL 28, 2017   TEMPERATURE (DEGREES F) MAX.....81   NORMAL.....61 MIN.....56   NORMAL.....42 MEAN....69   NORMAL.....52 DEPARTURE FROM 30-YEAR NORMAL........................+17 TOTAL DEPARTURE FOR THE MONTH.......................+117 [+4.0 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-14 TOTAL HEATING UNITS FOR THE MONTH.............418   DEPARTURE........-107 TOTAL HEATING UNITS FOR THE SEASON...........5320   DEPARTURE........-689 TOTAL HEATING UNITS LAST SEASON TO DATE......4960   DIFFERENCE.......+360 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................25 W  AT 5:08 P.M.                    AERO........................23 W  AT 5:20 P.M.                    ASOS........................26 W  AT 5:10 P.M.                    DAVIS.......................23 W  AT 5:10 P.M. RMY 26 FASTEST MILE FOR YESTERDAY.....................19 W  AT 5:09 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................20 W  AT 5:11 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................19 W  AT 5:11 P.M. AVERAGE WIND SPEED AND DIRECTION.............10.3 SW                    ASOS......................10.7                    DAVIS......................8.9 WSW [240 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........6.65  DEPARTURE......+2.36                          ASOS..............6.76 TOTAL PRECIPITATION FOR THE YEAR..........20.77  DEPARTURE......+2.48                          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........0.0 TOTAL SNOWFALL FOR THE MONTH................2.7  DEPARTURE.......-0.3 TOTAL SNOWFALL FOR THE SEASON..............66.4  DEPARTURE.......+3.7 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 4/1  35/31/33/-8/2.21/2.7/000/00           40 ENE AERO 41 ENE RMY 41 4/2  53/30/42/+1/0.00/0.0/552/72           32 NW  AERO 33 NW  RMY 34 4/3  60/35/48/+6/0.00/0.0/685/89           21 W*  AERO 20 NW  RMY N/A 4/4  42/35/39/-3/0.78/0.0/000/00           41 ESE AERO 43 ESE RMY 42 4/5  41/35/38/-5/0.00/0.0/000/00           21 NNW AERO 20 NNW RMY N/A 4/6  55/35/45/+2/1.27/0.0/000/00           35 SSE AERO 37 S   RMY 37  TSTM 4/7  53/38/46/+3/0.00/0.0/226/29           43 SSW AERO 47 SSW RMY 48 4/8  50/34/42/-2/0.00/0.0/666/85           37 WNW AERO 40 WNW RMY 39 4/9  65/34/50/+6/0.00/0.0/716/91           23 W   AERO 23 W   RMY N/A 4/10 77/45/61/+16/0.00/0.0/560/71          37 S   AERO 37 S   RMY 39 4/11 85/50/68/+23/0.00/0.0/642/81          28 S   AERO 28 S   RMY 30 4/12 68/47/58/+13/0.01/0.0/382/48          26 WNW AERO 28 WNW RMY N/A 4/13 58/39/49/+3/0.00/0.0/567/71           28 WNW AERO 31 NW  RMY 30  4/14 62/40/51/+5/0.00/0.0/801/100          22 NNW AERO 22 NNW RMY 24 4/15 68/40/54/+7/0.01/0.0/675/84           40 SSW AERO 45 SSW RMY 45 4/16 86/55/71/+24/T/0.0/758/94             38 W*  AERO 39 SW  RMY 42 4/17 75/48/62/+15/0.00/0.0/405/50          37 W   AERO 37 W   RMY 43 4/18 52/35/44/-4/0.00/0.0/779/96           25 ENE AERO 23 ENE RMY 25 4/19 54/34/44/-4/0.06/0.0/431/53           31 S   AERO 33 S   RMY 34 4/20 58/42/50/+1/0.05/0.0/270/33           25 SSW AERO 24 SSW RMY 23 4/21 45/42/44/-5/0.50/0.0/000/00           26 ESE AERO 29 ESE RMY 28 4/22 44/40/42/-7/0.14/0.0/.../..           22 NE  AERO 22 NNE RMY 20 4/23 65/37/51/+1/0.00/0.0/.../..           28 S   AERO 26 S   RMY 28 4/24 69/42/56/+6/0.00/0.0/.../..           23 SSW*AERO 22 SSW*RMY N/A 4/25 49/42/46/-4/..../0.0/.../..           35 NE  AERO 36 NE  RMY 35 4/26 60/47/54/+3/..../0.0/.../..           29 ENE AERO 28 ENE RMY N/A 4/27 66/50/58/+7/0.00/0.0/.../..           20 S   AERO 20 S   RMY N/A 4/28 81/56/69/+17/.../.../.../..           25 W   AERO 23 W   RMY 26 4/29 Low temp since midnight is 61F; normal low is now 52F DAILY RECORDS FOR APRIL 2017 4/11/17: DAILY RECORD MAXIMUM TEMPERATURE OF 85F,          BREAKS PREVIOUS RECORD OF 78F SET IN 1945 4/11/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 50F,          TIES WITH PREVIOUS RECORD SET IN 1955 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):       RECORDS FOR APRIL 29 HIGH 85 IN 1974 LOW 26 IN 1909 PRECIP 1.65 IN 1923 SNOWFALL 1.0 IN. IN 1987 PEAK GUST 55 MPH WNW IN 2010 RECORDS FOR APRIL 30 HIGH 86 IN 1942 LOW 30 IN 1931 PRECIP 1.41 IN 1991 SNOWFALL 0.3 IN. IN 1909 PEAK GUST 64e MPH NW IN 1978 TODAY'S REPORT PREPARED BY: Lizzy Suzedell