BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, JULY 1, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME MORE THUNDERSTORMS THIS AFTERNOON, MISSING US SO FAR.... Clouds continue to be the theme today with periods of very light rain at times. Building cumulus clouds were seen this morning, becoming cumulonimbus around 1 P.M. Wind has been light all day, barely exceeding 10 mph on average. Thunder was heard following the 1 P.M. observation, with some lightning strikes being seen to the northwest. Significant rainfall has not reached the observatory, while there are many areas of rainfall being seen in the distance. The high so far today is 76 degrees, this is 3 degrees below the daily normal high of 79F. The low since midnight is 63F, which is 2 degrees above the daily normal low of 61F. Rainfall for the month is now up to 7.56", which has now set a surplus for the month of 3.25". The yearly deficit is now erased, going from near -4 inches 3 days ago to to +0.38" as of 7 A.M. this morning. Impressive in such a short time! - Matthew Douglas Today's Observations: 7 A.M. Weather: Broken cumulus congestus Temperature: 66F; Dew Point: 65F; Relative Humidity: 97% Wind: WNW at 5 kts, wind light Sea-level pressure: 29.89 ins. Hg: rising, then more slowly Visibility: 60 miles 6-hr Max temp: 66F 6-hr Min temp: 63F 24-hr Precip: Trace 24-hr Frozen: 0.0 ins. BHO SA 1155 E20 BKN 60 122/66/65/2905/989/ WND LGT/ 8/800 50004 10066 20063 10 A.M. Weather: Broken cumulus congestus Temperature: 72F; Dew Point: 65F; Relative Humidity: 80% Wind: WNW at 5 kts, wind light Sea-level pressure: 29.89 ins. Hg: falling then rising Visibility: 75 miles 3-hr Precip: 0.00 ins. 3-hr Frozen: 0.0 ins. BHO SA 1455 E30 BKN 75 123/72/65/3005/989/ WND LGT/ 8/200 50001 1 P.M. Weather: Broken cumulus congestus and cumulonimbus Temperature: 74F; Dew Point: 65F; Relative Humidity: 74% Wind: NE at 7 kts Sea-level pressure: 29.86 ins. Hg: rising then falling Visibility: 40 miles, 10 miles SE-NW due to virga 6-hr Max temp: 76F 6-hr Min temp: 66F 6-hr Precip: Trace 6-hr Frozen: 0.0 ins. BHO SA 1755 E30 BKN 40 117/74/65/0507/986/ VIRGA VSBY 10 MI SE-NW/ 8/300 600// 56009 10076 20066 SUMMARY FOR TUESDAY, JUNE 30, 2020 TEMPERATURE (DEGREES F) MAX.....68 NORMAL.....79 MIN.....62 NORMAL.....61 MEAN....65 NORMAL.....70 DEPARTURE FROM 30-YEAR NORMAL................. -5 TOTAL DEPARTURE FOR THE MONTH.................+78 [+2.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY................0 DEPARTURE....... -1 TOTAL HEATING UNITS FOR THE MONTH...............40 DEPARTURE.......-33 TOTAL HEATING UNITS FOR THE SEASON............5852 DEPARTURE......-524 TOTAL HEATING UNITS LAST SEASON TO DATE.......6254 DEPARTURE......-402 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY.................0 DEPARTURE....... -6 TOTAL COOLING UNITS FOR THE MONTH...............152 DEPARTURE.......+47 TOTAL COOLING UNITS FOR THE SEASON..............184 DEPARTURE.......+55 TOTAL COOLING UNITS LAST SEASON TO DATE..........89 DEPARTURE.......+95 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................14 ENE AT 11:43 A.M. AERO.........................14 ENE AT 11:26 A.M. ASOS.........................14 NE AT 11:44 A.M. DAVIS........................13 ENE AT 11:31 A.M RMY 13 FASTEST MILE FOR YESTERDAY...................... 8 ENE AT 7:02 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE................... 9 ENE AT 7:07 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................10 ENE AT 7:02 P.M. AVERAGE WIND SPEED AND DIRECTION.............. 4.5 ENE ASOS....................... 5.0 DAVIS...................... 5.0 ENE [055 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......T DEPARTURE......-0.11 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........7.56 DEPARTURE......+3.25 ASOS..............7.70 TOTAL PRECIPITATION FOR THE YEAR..........27.35 DEPARTURE......+0.38 ASOS.............28.01 PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 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/0.0/.../.. 23 E AERO 21 E RMY N/A 06/10 70/58/64/-1/T/0.0/.../.. 25 E AERO 24 E RMY N/A 06/11 71/64/68/+3/0.62/0.0/.../.. 40 S AERO 40 S RMY 42 06/12 82/63/73/+8/0.00/0.0/.../.. 26 W AERO 25 W RMY 27 06/13 71/53/62/-3/0.00/0.0/.../.. 21 WNW AERO 20 WNW RMY N/A 06/14 67/49/58/-8/0.00/0.0/.../.. 21 E AERO 21 ENE RMY 21 06/15 67/53/60/-6/5/0/0.0/.../.. 21 NE AERO 16 ENE RMY 20 06/16 73/54/64/-2/0.00/0.0/.../.. 18 E AERO 18 E RMY 18 06/17 78/57/68/+1/0.00/0.0/.../.. 20 S AERO 20 S RMY 20 06/18 86/59/73/+6/0.00/0.0/.../.. 22 S AERO 22 SSW RMY 22 06/19 86/66/76/+9/0.00/0.0/.../.. 22 S AERO 22 S RMY 21 06/20 90/65/78/+10/0.00/0.0/.../.. 22 S AERO 21 S RMY 21 06/21 90/66/78/+10/0.83/0.0/.../.. 33 ESE AERO 35 ESE RMY 33 TSTM 06/22 77/65/71/+3/0.00/0.0/.../.. 15 E AERO 17 S RMY 14 06/23 85/65/75/+7/0.00/0.0/.../.. 27 S AERO 24 S RMY 26 06/24 84/66/75/+6/0.00/0.0/.../.. 25 S AERO 24 S RMY 25 06/25 84/63/74/+5/0.00/0.0/.../.. 29 W AERO 29 W RMY 29 06/26 83/65/74/+5/0.02/0.0/.../.. 25 S AERO 25 S RMY 27 06/27 82/65/74/+5/0.05/0.0/.../.. 21 S AERO 20 S RMY 20 06/28 84/62/73/+3/3.27/0.0/.../.. 35 W AERO 33 N RMY 37 TSTM 06/29 71/61/66/-4/..../0.0/.../.. 18 NE AERO 18 NE RMY 18 TSTM 06/30 68/62/65/-5/..../.../.../.. 14 ENE AERO 14 ENE RMY 13 Record rainfall on the 28th of 3.27". Old record 2.09" in 1938 07/01 The low since midnight is 63F, the daily normal low is 61F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 1 HIGH 98F IN 1964 LOW 44F IN 1988 [RECORD FOR MONTH] PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH] PEAK GUST 52 MPH WNW IN 1974 RECORDS FOR JULY 2 HIGH 95F IN 1963 LOW 47F IN 1988 PRECIP 1.42 INS IN 1986 PEAK GUST 45 MPH SW IN 1999 TODAY'S REPORT PREPARED BY: Benjamin Turner