BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JUNE 2, 2016  ALL TIMES ARE IN EASTERN STANDARD TIME LOW CLOUDS AND NORTHEASTERLY WINDS KEEP TEMPS COOL... MAY 2016 FINISHES WARMER AND WETTER THAN NORMAL... Fog enveloped Great Blue Hill early this morning offering a visibility of 1 mile at the 7:00AM EST observation.  It was slow to burn off as the sun rose.  Visibility increased to 20 miles by 10:00AM, but skies were still overcast with low stratus. Blue sky could be seen by the 1:00PM observation as the stratus layer turned into scattered cumulus and scattered cirrus clouds. Temperatures remained cooler than average during the afternoon. By the 1:00PM observation, the maximum temp. was only 68F, 3F  below normal. After running cooler than normal for most of the month, the warm temperatures of the last week of May raised the mean temperature enough for it to finish warmer than normal. Despite a wet and cloudy first week of May, the rest of the month was relatively dry except for the nearly inch of rain that fell on the 30th. The total precipitation of 3.13 inches was about an inch drier than the 30-year normal for May. The month also brought the first 90-degree day of the year on the 28th and the second thunderstorm day of the year on the 24th. PRELIMINARY STATS FOR MAY 2016  TEMPERATURE, Deg. F Avg. Max. 66.9 [+0.6] Avg. Min. 48.8 [+1.0] Mean      57.9 [+0.8] 24-hour corrected mean: 57.2 Max. for month: 92 on 28th Min. for month: 38 on 16th HEATING DEGREE DAYS Total heating units: 256 [-12]   Total for the season: 5248 [-1055] Total for last season: 6404 PRECIPITATION, Inches Total: 3.13 [-0.98] Greatest in 24 hrs: 0.94 in. on 30th   SNOWFALL, Inches Total: T [0.0] Greatest in 24 hrs: Trace on the 1st WIND, mph Avg. uncorrected wind speed: 10.7 Avg. corrected wind speed: 11.3 Prevailing wind direction: W at 15% Peak gust and direction: 50 W on 15th SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A Today's Observations: 7 A.M.  Weather: Thick fog Temperature: 55F; Dew Point: 54F; Wind: estimated ENE at 6 kts, Wind: Light and variable Sea-level pressure: 30.23 ins. Hg, rising, then more slowly Visibility: 1 mile 6-hr Max temp: 55F  6-hr Min temp: 54F 24-hr precip: 0.00 in. BHO SA 1155 W3 X 1F 236/55/54/E0606/023/ WND L/V/  8//// 51011 10055 20054 10 A.M. Weather: Overcast stratus  Temperature: 61F; Dew Point: 54F; Wind: estimated E at 6 kts, Wind: Light and variable Sea-level pressure: 30.23 ins. Hg, rising, then more slowly Visibility: 20 miles, distant haze BHO SA 1455 E4 OVC 20 237/61/54/E0806/023/ DSNT HZ WND L/V/  8/6// 51001 1 P.M. Weather: Scattered cumulus, scattered cirrus Temperature: 67F; Dew Point: 56F; Wind: NE at 8 kts Sea-level pressure: 30.19 ins. Hg, rising, then falling  Visibility: 20 miles, distant haze 6-hr Max temp: 68F 6-hr Min temp: 55F BHO SA 1755 20 SCT 220 SCT 20 223/67/56/0408/019/ DSNT HZ/  8/101 58014 10068 20055 SUMMARY FOR WEDNESDAY, JUNE 1, 2016     TEMPERATURE (DEGREES F) MAX.....71   NORMAL.....71 MIN.....54   NORMAL.....53  MEAN....63   NORMAL.....62 DEPARTURE FROM 30-YEAR NORMAL.........................+1 TOTAL DEPARTURE FOR THE MONTH.........................+1 [+0.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............2   DEPARTURE..........-3 TOTAL HEATING UNITS FOR THE MONTH...............2   DEPARTURE..........-3 TOTAL HEATING UNITS FOR THE SEASON...........5250   DEPARTURE.......-1058 TOTAL HEATING UNITS LAST SEASON TO DATE......6422   DIFFERENCE......-1172    PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................26 NE   AT  7:24 A.M.                             ASOS........................31 NE   AT  7:25 A.M.                          DAVIS.......................28 NE   AT  7:25 A.M. RMY N/A FASTEST MILE FOR YESTERDAY.....................19 ENE  AT 10:45 A.M. *                        MAXIMUM 2-MINUTE ASOS AVERAGE..................20 ENE  AT 10:45 A.M.       MAXIMUM 2-MINUTE DAVIS AVERAGE.................18 NE   AT  7:26 A.M.        AVERAGE WIND SPEED AND DIRECTION.............11.5 NE                    ASOS......................11.7                    DAVIS.....................10.2 NE [050 Deg.] * Last of several occurrences 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..........0.00  DEPARTURE......-0.17                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........20.07  DEPARTURE......-2.76                          ASOS.............20.44   PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/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 5/1 52/39/46/-7/0.08/T/000/00               21 S   AERO 22 SE  RMY 20 5/2 50/41/46/-7/0.31/0.0/000/00             20 NE  AERO 21 NE  RMY 18 5/3 48/43/46/-7/0.16/0.0/000/00             16 E   AERO 16 E   RMY 17  5/4 48/41/45/-9/0.53/0.0/000/00             33 NE  AERO 35 NE  RMY 34 5/5 44/41/43/-11/0.30/0.0/000/00            39 NNE AERO 41 NNE RMY 39 5/6 54/43/49/-5/0.13/0.0/360/42             28 ENE AERO 29 N   RMY 26 5/7 51/43/47/-8/0.06/0.0/000/00             25 NE  AERO 25 NE  RMY 23 5/8 60/46/53/-2/0.10/0.0/284/33             47 W   AERO 53 W   RMY 49          5/9 65/43/54/-1/0.00/0.0/743/86             40 W   AERO 44 W   RMY 40 5/10 69/40/55/0/0.00/0.0/806/93             22 W   AERO 25 WNW RMY 22 5/11 76/50/63/+7/0.00/0.0/808/93            22 WNW AERO 23 WNW*RMY 22 5/12 75/54/65/+9/0.00/0.0/819/94            23 NNE AERO 25 S   RMY 23 5/13 74/52/63/+7/0.21/0.0/079/09            27 S   AERO 27 S   RMY 26   5/14 78/54/66/+9/0.00/0.0/656/75            35 SSW*AERO 40 SSW RMY 37 5/15 60/41/51/-6/0.00/0.0/588/67            50 W   AERO 54 W   RMY 49 5/16 58/38/48/-9/0.00/0.0/800/91            45 W*  AERO 51 WNW RMY 49 5/17 69/47/58/+1/0.00/0.0/344/39            32 W   AERO 38 W   RMY 38 5/18 64/48/56/-2/0.00/0.0/804/91            24 NE  AERO 26 NNW RMY N/A 5/19 66/49/58/0/0.26/0.0/.../..             23 WNW AERO 26 WNW RMY 25  5/20 73/46/60/+2/0.00/0.0/.../..            20 SSE AERO 22 SSE RMY 21 5/21 74/53/64/+5/0.00/0.0/.../..            21 S   AERO 23 S   RMY 21     5/22 64/53/59/0/T/0.0/.../..                26 ENE AERO 29 ENE RMY 26 5/23 74/51/63/+4/T/0.0/.../..               22 ENE AERO 31 ENE RMY N/A             5/24 56/50/53/-6/0.12/0.0/.../..            30 ENE AERO 31 ENE RMY 29 TSTM 5/25 86/51/69/+9/0.00/0.0/.../..            25 W   AERO 28 W   RMY 25 5/26 86/64/75/+15/0.00/0.0/.../..           21 SE  AERO 23 SE  RMY 21 5/27 81/60/71/+11/0.00/0.0/.../..           26 S   AERO 30 S   RMY 29 5/28 92/63/78/+17/0.00/0.0/.../..           22 SSW AERO 22 SSW RMY N/A  5/29 72/51/62/+1/0.00/0.0/.../..            18 NE  AERO 20 NE  RMY 18 5/30 71/52/62/+1/0.94/0.0/.../..            25 SSW AERO 28 SSW RMY 27 5/31 84/67/76/+15/0.00/0.0/.../..           25 W   AERO 29 WSW RMY 28    6/1 71/54/63/+1/0.00/.../..                 26 NE  AERO 30 NE  RMY N/A 6/2 low temp since midnight is 54F; normal low now 53F * Last of several occurrences       DAILY RECORDS FOR MAY 2016 5/1/16: DAILY RECORD SNOWFALL OF A TRACE,         TIES PREVIOUS RECORDS SET IN 1905, 1917, 1921, and 1995 5/28/16: DAILY RECORD MAXIMUM TEMP. OF 92F,           PREVIOUS RECORD OF 90F SET IN 1914    DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):  RECORDS FOR JUNE 2 HIGH 91F IN 1895 LOW 41F IN 1907, 1929 PRECIP 2.36 INS IN 1982 SNOWFALL TRACE IN 1907 (IP) PEAK GUST 63 MPH NW IN 2000 RECORDS FOR JUNE 3 HIGH 98F IN 1919 LOW 38F IN 1929 PRECIP 2.40 INS 2006 PEAK GUST 47 MPH NW IN 1998 TODAY'S REPORT PREPARED BY: Cece Borries-Strigle / Mike Iacono