Thursday, June 27, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JUNE 27, 2024 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0410E SUNSET:  1925E OVERNIGHT STORMS GIVE WAY TO BEAUTIFUL CONDITIONS…. Following several rounds of showers and thunderstorms last night and into early this morning, during which we received 1.83″ of rainfall, conditions have been quite pleasant today. Skies cleared briefly this morning, before cumulus began to develop and dot the sky. Still, cooler temperatures combined with a falling dew point and plenty of sunshine makes it a great day to be outside. Temperature-wise, we began the morning in the mid 60s, and have since risen into the upper 70s by the afternoon. The dew point also began in the mid 60s as the air was saturated this morning, but has been slowly falling throughout the day, reaching the low 60s as of the last observation. The wind has slowed a bit since yesterday, with an average so far of only 8mph. The prevailing direction has been somewhat variable due to light speeds, but generally the flow is out of the west. The peak gust is only about 21mph, occurring a bit before 11am. Visibility has markedly improved as dryer air pushes in. Views this morning were limited to 30 miles due to thin fog, but they quickly jumped to 60 miles by late morning. The maximum temperature so far today is 78F, which is 1 degree below the normal high of 79F. The minimum temperature since midnight is 64F, which is 3 degrees above the normal low of 61F. ————————————————————– Today’s Observations: 7 A.M. Weather: Scattered altocumulus, broken altostratus, few cumulus distant NNE-NE, few towering cumulus distant E-S Temperature: 65F; Dew Point: 64F; Relative Humidity: 98% Wind: W @ 5 kts, wind light Sea-level pressure: 1006.3 mb; 29.72 in. Hg: falling, then rising Visibility: 30 miles, thin fog all quadrants 6-hr Max temp: 65F 6-hr Min temp: 64F 24-hr Precip:  1.83 inches BHO SA 1155 100 SCT 180 BKN 30 063/65/64/2705/972/ FEW CU DSNT NNE-NE FEW TCU DSNT E-S CLRNG DSNT SW-W-N THN F ALQDS PTCHY GF ALQDS WND LGT/ 8/270 53007 70183 10065 20064 10 A.M. Weather: Scattered cumulus, scattered cirrostratus Temperature: 72F; Dew Point: 64F; Relative Humidity: 76% Wind: W @ 9 kts Sea-level pressure: 1006.7 mb; 29.73 in. Hg: rising, then steady Visibility: 60 miles 3-hr Precip:  0.00 inches BHO SA 1455 20 SCT 200 SCT 60 067/72/64/2809/973/ 8/208 51004 1 P.M. Weather: Scattered cumulus, scattered cirrostratus Temperature: 77F; Dew Point: 62F; Relative Humidity: 59% Wind: W @ 8 kts Sea-level pressure: 1007.2 mb; 29.74 in. Hg: rising, then more slowly Visibility: 60 miles 6-hr Max temp: 78F 6-hr Min temp: 65F 6-hr Precip:  0.00 inches BHO SA 1755 45 SCT 220 SCT 60 072/77/62/2808/974/ 8/208 51005 10078 20065 ————————————————————– SUMMARY FOR WEDNESDAY, JUNE 26, 2024 TEMPERATURE (DEGREES F) MAX…….87  NORMAL…..79 MIN…….65  NORMAL…..61 MEAN……76  NORMAL…..70 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+6 TOTAL DEPARTURE FOR THE MONTH…………………….+90 [+3.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024) TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1 TOTAL HEATING UNITS FOR THE MONTH……………12  DEPARTURE…….-52 TOTAL HEATING UNITS FOR THE SEASON…………5391  DEPARTURE……-817 TOTAL HEATING UNITS LAST SEASON TO DATE…….5295  DEPARTURE…….+96 COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024) TOTAL COOLING UNITS FOR YESTERDAY……………11  DEPARTURE……..+5 TOTAL COOLING UNITS FOR THE MONTH…………..124  DEPARTURE…….+37 TOTAL COOLING UNITS FOR THE SEASON………….161  DEPARTURE…….+46 TOTAL COOLING UNITS LAST SEASON TO DATE………99  DEPARTURE…….+62 PEAK WIND GUST (MPH): Note: Instruments designated #1 = Main Tower, #2 = South Tower, F420C, Contacting, Merlin, and Richards are all on Main Tower. E=Estimated F420C (Official)……….E37 WSW  @   10:44 P.M. VECTOR #1 (1-Sec)……….37 WSW  @   10:44 P.M. VECTOR #2 (1-Sec)……….45 WSW  @   10:45 P.M. DAVIS #1……………….35 W    @   10:45 P.M. DAVIS #2 ………………41 SW   @   10:45 P.M. RMY #1 (Instantaneous)…..41 WSW  @   10:44 P.M. RMY #2 (Instantaneous)…..46 WSW  @   10:45 P.M. MERLIN…………………35 W RICHARDS (C5C) (Inst)…..OTS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………25 WSW  @   10:45 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25      @   04:51 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27      @   10:45 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 WSW  @   10:45 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………27 WSW  @   10:45 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 SSW  @   04:51 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..26 WSW  @   10:45 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……12.3 SW [294 total miles] VECTOR #1…………….12.3 VECTOR #2…………….12.8 DAVIS #1……………..12.0 SW DAVIS #2……………..12.7 WSW RMY #1……………….12.1 SW RMY #2……………….12.8 SW RICHARDS (C5C)…………OTS PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..1.83 DEPARTURE…..+1.68 TOTAL PRECIPITATION FOR THE MONTH…………..4.72 DEPARTURE…..+0.61 TOTAL PRECIPITATION FOR THE YEAR (2024)…….35.54 DEPARTURE…..+8.83 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST PEAK GUST: F420C (Official) VEC1: Vector #1 1-second gust RMY:  R.M. Young #1 wind gust recording system (Instantaneous) TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized M:    Missing data 6/1   79/53/66/+4/0.00/878/97             18 WNW VEC1 20 NW  RMY 20 6/2   83/52/68/+6/0.00/780/86             21 W   VEC1 21 W   RMY 21 6/3   78/57/68/+6/0.00/626/69             22 NE  VEC1 22 NE  RMY 21 6/4   75/55/65/+2/0.00/817/90             20 SSW VEC1 19 SSW RMY 19 6/5   84/56/70/+7/T/564/62                29 SW  VEC1 28 SW  RMY 29 6/6   74/60/67/+4/0.01/064/07             20 SSE VEC1 20 SSE RMY 20 6/7   80/60/70/+6/0.14/410/45             26 WNW VEC1 27 WNW RMY 27 6/8   73/54/64/0/T/767/84                 48 W   VEC1 49 W   RMY 47 6/9   67/55/61/-3/0.25/292/32             29 WNW VEC1 28 WNW RMY 26 6/10  75/54/65/0/T/868/95                 28 W   VEC1 27 W   RMY 27 6/11  71/53/62/-3/0.00/320/35             16 WNW VEC1 15 WNW RMY 15 6/12  76/59/68/+3/0.00/531/58             16 S   VEC1 16 SSE RMY 17 6/13  82/57/70/+4/0.00/869/95             28 SW  VEC1 27 SW  RMY 28 6/14  84/63/74/+9/0.75/476/52             50 NW  VEC1 50 NW  RMY 53 TSTM 6/15  75/54/66/0/0.23/824/90              23 NNW VEC1 27 NW  RMY 26 6/16  72/51/62/-5/0.00/815/89             22 SSE VEC1 23 S   RMY 23 6/17  80/56/68/+1/0.00/596/65             30 SSW VEC1 31 SSW RMY 31 6/18  92/64/78/+11/0.00/853/93            24 SW  VEC1 23 SSW RMY 23 6/19  93/66/80/+12/0.00/642/70            24 SW  VEC1 24 SW  RMY 25 6/20  94/68/81/+13/0.10/706/77            36 NNW VEC1 37 NNW RMY 36 TSTM 6/21  83/61/72/+4/0.90/…/..             28 ENE VEC1 28 ENE RMY 28 TSTM 6/22  69/59/64/-5/0.27/…/..             19 NE  VEC1 21 NE  RMY 21 6/23  84/59/72/+3/0.15/…/..             38 SSW VEC1 38 SSW RMY 38 6/24  80/61/71/+2/0.09/…/..             36 N   VEC1 36 N   RMY 40 6/25  86/61/74/+4/T/…/..                26 NNW VEC1 26 NNW RMY 27 6/26  87/65/76/+6/1.63/…/..             37 WSW VEC1 37 WSW RMY 41 TSTM 6/27  The low since midnight is 64F, the daily normal low is 61F. ————————————————————– JUNE DAILY RECORDS TO DATE 6/19 RECORD MAXIMUM TEMPERATURE OF 93F, BEATING THE PREVIOUS RECORD OF 92F SET IN 1923 6/20 RECORD MAXIMUM TEMPERATURE OF 94F, TIED WITH PREVIOUS RECORD SET IN 1953 6/20 RECORD HIGH MINIMUM TEMPERATURE OF 68F, TIED WITH PREVIOUS RECORD SET IN 1923 AND 1931 6/26 RECORD PRECIPITATION OF 1.63″, BEATING THE PREVIOUS RECORD OF 1.22″ SET IN 1938 ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JUNE 27 HIGH 93F IN 1999, 2007 LOW 46F IN 1897 PRECIP 1.72 INS IN 1938 PEAK GUST 55e N IN 1945 RECORDS FOR JUNE 28 HIGH 95F IN 1991 LOW 47F IN 1970 PRECIP 3.27 INS IN 2020 PEAK GUST 52 MPH WSW IN 1993 TODAY’S REPORT PREPARED BY: Joshua Polen