BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JUNE 11, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME FOGGY WITH SOME DECENT RAIN SHOWERS IN THE AFTERNOON.... Visibility was 15 miles at maximum today, with a distant fog. Rain moved in around noontime, leaving 0.22 inches in the gauge by the 1 P.M. observation. This was accompanied by a couple rumbles of thunder coming from the north. Wind has been strong from the south, with a max gust of 40 mph seen today. The high so far today is 71 degrees, this is 3 degrees below the daily normal high of 74F. The low since midnight is 65F, which is 9 degrees above the daily normal low of 56F. PRELIMINARY STATS FOR MAY 2020 TEMPERATURE, Deg. F Avg. Max. 67.2 [+0.9] Avg. Min. 45.8 [-2.0] Mean 56.5 [-0.6] 24-hour corrected mean: 56.1 Max. for month: 84F on the 27th Min. for month: 31F on the 10th HEATING DEGREE DAYS Total heating units: 291 [+21] Total for the season: 5812 [-491] Total for last season: 5432 COOLING DEGREE DAYS Total cooling units: 32 [+10] Total for the season: 32 [+8] Total for last season: 8 PRECIPITATION, Inches Total: 2.75 [-1.36] Greatest in 24 hrs: N/A SNOWFALL, Inches Total: Trace Greatest in 24 hrs: Trace on the 9th WIND, mph Avg. uncorrected wind speed: 12.3 mph Avg. corrected wind speed: 12.7 mph Prevailing wind direction: W [16%] Peak gust and direction: 52 W on the 9th SUNSHINE: Campbell-Stokes card minutes: 16248 minutes of possible 26226 or 62% Astronomical total minutes: 16872 minutes of possible 27210 or 62% Today's Observations: 7 A.M. Weather: Scattered stratus fractus, broken altostratus and cirrostratus Temperature: 69F; Dew Point: 64F; Relative Humidity: 85% Wind: S at 18G29 kts, peak wind of 37 MPH at 6:26 A.M. Sea-level pressure: 30.01 ins. Hg: rising, then falling Visibility: 15 miles, fog 6-hr Max temp: 69F 6-hr Min temp: 56F 24-hr Precip: Trace 24-hr Snowfall: 0.0 ins. BHO SA 1155 25 SCT E180 BKN 250 BKN 15 164/69/64/1918G29/001/ DSNT FG ALQDS PK WND 1932/26/ 8/628 56004 10069 20056 10 A.M. Weather: Overcast stratus Temperature: 69F; Dew Point: 64F; Relative Humidity: 83% Wind: S at 13G34 kts, peak wind of 39 MPH at 9:56 A.M. Sea-level pressure: 30.03 ins. Hg: falling, then rising Visibility: 15 miles, distant fog 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 20 OVC 15 170/69/64/1913G34/003/ DSNT FG ALQDS PK WND 1934/56/ 8/6// 53006 1 P.M. Weather: Overcast stratus, rain with thunder Temperature: 67F; Dew Point: 67F; Relative Humidity: 100% Wind: S at 13G22 kts, peak wind of 35 MPH at 12:58 P.M. Sea-level pressure: 30.04 ins. Hg: rising steadily Visibility: 5 miles, fog 6-hr Max temp: 71F 6-hr Min temp: 69F 6-hr Precip: 0.22 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 20 OVC 5RF 173/67/67/1913G31/004/ RCTD TE30 PK WND 1931/58/ 8/6// 6022/ 53004 10071 20069 SUMMARY FOR WEDNESDAY, JUNE 10, 2020 TEMPERATURE (DEGREES F) MAX.....70 NORMAL.....73 MIN.....58 NORMAL.....56 MEAN....64 NORMAL.....65 DEPARTURE FROM 30-YEAR NORMAL.................-1 TOTAL DEPARTURE FOR THE MONTH................+25 [+2.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY............... 1 DEPARTURE........-2 TOTAL HEATING UNITS FOR THE MONTH...............24 DEPARTURE.......-16 TOTAL HEATING UNITS FOR THE SEASON............5836 DEPARTURE......-507 TOTAL HEATING UNITS LAST SEASON TO DATE.......6234 DEPARTURE......-398 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY............... 0 DEPARTURE........-3 TOTAL COOLING UNITS FOR THE MONTH...............31 DEPARTURE.......+10 TOTAL COOLING UNITS FOR THE SEASON..............63 DEPARTURE.......+18 TOTAL COOLING UNITS LAST SEASON TO DATE.........28 DEPARTURE.......+35 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................25 E AT 2:30 A.M. AERO.........................24 E AT 2:35 A.M. ASOS.........................25 E AT 2:30 A.M. DAVIS........................25 E AT 2:21 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................18 E AT 5:02 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................18 ENE AT 5:00 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................19 E AT 12:37 A.M. AVERAGE WIND SPEED AND DIRECTION..............11.2 E ASOS.......................11.5 DAVIS......................11.7 E [82 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...TRACE DEPARTURE......-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.29 DEPARTURE......-0.36 ASOS..............1.27 TOTAL PRECIPITATION FOR THE YEAR..........21.08 DEPARTURE......-3.23 ASOS.............21.58 PRELIMINARY CLIMATE SUMMARY FOR MAY 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 05/01 64/52/58/+5/..../0.0/000/00 46 SSE AERO 44 SSE RMY N/A 05/02 70/42/56/+3/..../0.0/729/86 41 NW AERO 40 NW RMY N/A 05/03 78/55/67/+14/0.00/0.0/613/72 35 SSW AERO 35 SSW RMY 36 05/04 72/45/59/+5/T/0.0/247/29 37 NW AERO 40 WNW RMY 39 05/05 60/40/50/-4/0.00/0.0/821/96 31 NW AERO 32 NW RMY N/A 05/06 57/38/48/-6/T/0.0/498/58 24 ESE AERO 22 ENE RMY 22 05/07 63/37/50/-5/0.00/0.0/576/67 30 WSW AERO 29 WSW RMY N/A 05/08 57/40/49/-6/..../0.0/328/38 31 W AERO 32 W RMY N/A 05/09 44/32/38/-17/..../T/484/56 52 W AERO 53 W RMY 54 05/10 59/31/45/-10/0.00/0.0/763/88 46 W AERO 46 W RMY 49 05/11 65/43/54/-2/0.22/0.0/322/37 39 S AERO 43 S RMY 41 05/12 55/37/46/-10/0.00/0.0/801/92 37 W AERO 37 W RMY 37 05/13 59/32/46/-10/0.00/0.0/864/99 37 WNW AERO 37 WNW RMY 38 05/14 70/40/55/-2/0.00/0.0/831/95 29 W AERO 26 W RMY 27 05/15 78/50/64/+7/..../0.0/535/61 40 WSW AERO 40 WSW RMY 43 05/16 69/47/58/+1/..../0.0/730/83 31 NW AERO 31 NW RMY 32 05/17 67/47/57/0/0.00/0.0/132/15 22 SSW AERO N/A RMY 21 05/18 60/47/54/-4/T/0.0/053/06 24 W AERO 22 ENE RMY N/A 05/19 56/45/51/-7/0.00/0.0/797/90 35 ENE AERO 34 ENE RMY 32 05/20 63/43/53/-5/0.00/0.0/869/98 22 ESE AERO 20 SE RMY 19 05/21 76/42/59/0/0.00/0.0/862/97 26 S AERO 25 S RMY 25 05/22 82/50/66/+7/0.00/0.0/864/97 29 W AERO 29 W RMY 28 05/23 67/44/56/-3/0.02/0.0/187/21 42 ENE AERO 43 ENE RMY 40 05/24 58/43/51/-8/T/0.0/822/92 27 ENE AERO 24 ENE RMY N/A 05/25 66/46/56/-4/0.00/0.0/072/08 18 ENE AERO 18 ENE RMY N/A 05/26 82/56/69/+9/0.00/0.0/727/81 21 S AERO 21 S RMY 21 05/27 84/59/72/+12/0.00/0.0/728/81 31 SSW AERO 31 SSW RMY 31 05/28 77/63/70/+9/..../0.0/027/03 33 SSW AERO 33 S RMY 33 05/29 78/66/72/+11/..../0.0/072/08 41 SSW AERO 41 SSW RMY 43 05/30 79/63/71/+10/..../0.0/713/79 30 S AERO 30 S RMY N/A 05/31 67/45/56/-5/0.00/0.0/805/89 33 WNW AERO 33 WNW RMY 32 DAILY RECORDS FOR MAY 2020 5/13/2020: NEW RECORD LOW OF 32F, REPLACING 35F SET IN 1914 AND 2005 PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 06/01 64/42/53/-9/T/0.0/.../.. 28 WNW AERO 29 WNW RMY 28 06/02 72/45/59/-3/..../0.0/.../.. 28 W AERO 27 W RMY 28 06/03 79/55/67/+5/T/0.0/.../.. 29 W AERO 28 W RMY 26 06/04 87/62/75/+12/..../0.0/.../.. 26 W AERO 25 S RMY N/A 06/05 80/65/73/+10/..../0.0/.../.. 28 SSW AERO 28 SSW RMY N/A TSTM 06/06 86/57/72/+9/..../0.0/.../.. 55 SW AERO 59 SW RMY 59 TSTM 06/07 68/54/61/-3/0.00/0.0/.../.. 24 NW AERO 24 NW RMY N/A 06/08 77/51/64/0/0.00/0.0/.../.. 25 W AERO 24 W RMY 25 06/09 77/60/69/+5/T/.../.. 23 E AERO 21 E RMY N/A 06/11 The low since midnight is 65F, the daily normal low is 56F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 11 HIGH 92F IN 1973, 1984 LOW 40F IN 1972 PRECIP 2.66 INCHES IN 1922 PEAK GUST 43e MPH S IN 1945 RECORDS FOR JUNE 12 HIGH 94F IN 2017 LOW 40F IN 1906 PRECIP 1.79 INS 1955 PEAK GUST 58 MPH NW IN 1991 TODAY'S REPORT PREPARED BY: Benjamin Turner