Friday, June 9, 2017

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, JUNE 9, 2017 ALL TIMES ARE IN EASTERN STANDARD TIME WARM AND DRY WITH PARTLY CLOUDY SKIES, AFTERNOON THUNDERSTORM Yesterday was the second day in June so far to not have an average temperature below normal. Yesterday’s average temperature was 64F, with a maximum temperature of 76F and minimum of 52F. So far today, the maximum temperature was 78F. A minimum of 53F occurred this morning. The air was dry with relative humidity in the mid 30s. Winds have been increasing out of the W, and a peak of 23 kts (26 MPH) out of the WNW was measured at 1:28 P.M. EST. Pressure had been falling yesterday, but it began to rise around 7:00 A.M. It began to fall again by the late morning. Visibility stayed at 70 miles for most of the area, except it was just 30 miles in the east in the morning due to distant fog. Distant haze remained in the area all day. A thunderstorm approached Great Blue Hill in the afternoon. Thunder was first heard around 1:45 P.M. EST, and it became more frequent around 2:00 P.M. Shortly after that, rain began to fall heavily, and Blue Hill measured about 0.14 inches (ASOS) of precipitation in 15 minutes. Winds increased to a maximum of 48 MPH out of the north. Temperatures dropped to 59F as the front moved in. Visibility at times was at only 1/8 mile. Today’s Observations: 7 A.M. Weather: Few cumulus NE-SE, scattered stratus, broken altocumulus Temperature: 56F; Dew Point: 52F; Wind: NW at 10G14 kts Sea-level pressure: 29.67 ins. Hg, falling, then less quickly Visibility: 70 miles except 30 miles N-SE, distant fog N-SE, distant haze in all directions 6-hr Max temp: 56F 6-hr Min temp: 53F 24-hr precip: 0.00 in. BHO SA 1155 30 SCT E130 BKN 70 048/56/52/3210G14/967/ FEW CU NE-SE VSBY N-SE 30 DSNT FG N-SE DSNT HZ ALQDS/ 8/670 56014 10056 20053 10 A.M. Weather: Few cumulus E-SSE and W, scattered stratus, scattered altocumulus Temperature: 70F; Dew Point: 42F; Wind: W at 10G17 kts Sea-level pressure: 29.67 ins. Hg, rising, then falling Visibility: 70 miles except 30 miles SE, distant fog SE, distant haze in all directions BHO SA 1455 40 SCT 160 SCT 70 048/70/42/2610G17/967/ FEW CU E-SSE AND W VSBY SE 30 DSNT FG SE DSNT HZ ALQDS/ 8/670 55000 1 P.M. Weather: Scattered cumulus, scattered stratus, scattered altocumulus Temperature: 77F; Dew Point: 49F; Wind: W at 11G20 kts Sea-level pressure: 29.65 ins. Hg, steady, then falling Visibility: 70 miles, distant haze in all directions 6-hr Max temp: 78F 6-hr Min temp: 56F BHO SA 1755 30 SCT 50 SCT 140 SCT 70 041/77/49/2811G20/965/ DSNT HZ ALQDS/ 8/670 58007 10078 20056 SUMMARY FOR THURSDAY, JUNE 8, 2017 TEMPERATURE (DEGREES F) MAX…..76   NORMAL…..73 MIN…..52   NORMAL…..55 MEAN….64   NORMAL…..64 DEPARTURE FROM 30-YEAR NORMAL……………………..0 TOTAL DEPARTURE FOR THE MONTH……………………-40 [-5.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY……………1   DEPARTURE……….-3 TOTAL HEATING UNITS FOR THE MONTH…………..59   DEPARTURE………+26 TOTAL HEATING UNITS FOR THE SEASON………..5721   DEPARTURE……..-615 TOTAL HEATING UNITS LAST SEASON TO DATE……5259   DIFFERENCE…….+462 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……….-2 TOTAL COOLING UNITS FOR THE MONTH……………2   DEPARTURE………-14 TOTAL COOLING UNITS FOR THE SEASON………….58   DEPARTURE………+18 TOTAL COOLING UNITS LAST SEASON TO DATE……..67   DEPARTURE……….-9 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY……………….21 SSE AT 3:55 P.M. AERO……………………21 SSE AT 3:49 P.M. ASOS……………………18 S   AT 3:45 P.M. DAVIS…………………..17 SSE AT 3:53 P.M. RMY 18 FASTEST MILE FOR YESTERDAY…………………13 SSE AT 3:52 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE………………13 SSE AT 4:44 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12 SSE AT 3:55 P.M. AVERAGE WIND SPEED AND DIRECTION…………..7.0 SSE ASOS…………………..7.1 DAVIS………………….5.5 S [175 deg.] 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……….2.96  DEPARTURE……+1.63 ASOS…………..3.06 TOTAL PRECIPITATION FOR THE YEAR……….28.30  DEPARTURE……+4.31 ASOS……………N/A *** *** ASOS annual total not available due to erroneous readings 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 M:    Missing data 6/1  78/55/67/+5/0.06/…/..               39 NW  AERO 39 NW  RMY 41 6/2  70/50/60/-2/T/…/..                  32 WNW AERO 35 WNW RMY 34 6/3  66/47/57/-5/0.01/…/..               23 NW  AERO 25 NW  RMY 24 6/4  71/49/60/-3/0.28/…/..               21 SSE*AERO 21 SW  RMY N/A 6/5  55/49/52/-11/1.20/000/00              32 NE  AERO 35 NE  RMY N/A 6/6  49/45/47/-16/…./000/00              40 ENE AERO 43 ENE RMY 43 6/7  65/47/56/-8/…./…/..               21 NNE AERO 18 NE* RMY 20 6/8  76/52/64/0/0.00/…/..                21 SSE AERO 21 SSE RMY 18 6/9 Low temp since midnight is 53F; normal low is now 55F DAILY RECORDS FOR JUNE None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 9 HIGH 94F IN 2008 LOW 40F IN 1980 PRECIP 2.08 INCHES IN 1931 PEAK GUST 67 MPH NW IN 1973 RECORDS FOR JUNE 10 HIGH 98F IN 2008 LOW 42F IN 1913,1920 PRECIP 2.51 INCHES IN 1931 PEAK GUST 60e MPH NW IN 1941 TODAY’S REPORT PREPARED BY: Lizzy Suzedell