BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, NOVEMBER 19, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0640E SUNSET: 1619E FOLLOWING YESTERDAY'S NEAR RECORD WARTH, IT'S STRAIGHT BACK TO THE CHILL... Main story here is the dramatic change in temperature over the past 24-hours. At the 7 AM observation yesterday, we saw the mercury begin at 54F coinciding with a dew point of 52F! The early afternoon featured a near-recording setting high of 69F. This will go down as the 3rd warmest day for this date falling just shy of the all-time max of 72F set in 1963. Just after midnight today, a cold front swiped through the area flipping winds from the SW to WNW. The mercury took a tumble to 37F by sunrise. For those in central and eastern MA who hoped to catch the lunar eclipse, the frontal passage obscured most of the action. If eager for another opportunity, the next occurance is just 6 months away, so mark your calendars for May 15, 2022! As for the daytime hours, we are seeing mostly sunny skies with improving visibility. The wind has escalated peaking at 42 MPH with an average now at 15 MPH. The high so far today is 51F (set at midnight), 2 degrees above the normal max of 49F. The low since midnight is 37F, 4 degrees above the normal low of 33F. -------------------------------------------------------------- Today's Observations: 7 A.M. Weather: Broken Stratocumulus (Line of stratocumulus offshore distant NE-SE moving east) Temperature: 37F; Dew Point: 36F; Relative Humidity: 97% Wind: WNW @ 10G16kts Sea-level pressure: 1016.3 mb; 30.01 in. Hg: rising, then rising more rapidly Visibility: 35 miles, thin fog 6-hr Max temp: 47F 6-hr Min temp: 37F 24-hr Precip: 0.29 ins. BHO SA 1155 10 BKN 35 163/37/36/2910G16/001/ LINE SC OFFSHR DSNT NE-SE MVG E THN F ALQDS/ 8/500 53017 70029 10047 20037 10 A.M. Weather: Scattered Cumulus and Stratocumulus Temperature: 42F; Dew Point: 30F; Relative Humidity: 62% Wind: WNW @ 15G24kts Sea-level pressure: 1018.3 mb; 30.07 in Hg; rising unsteadily Visibility: 50 miles, hazy 3-hr Precip: 0.00 ins. BHO SA 1455 40 SCT 50 183/42/30/3015G24/007/ HAZY/ 8/500 52020 1 P.M. Weather: Scattered Cumulus Temperature: 44F, Dew point: 26F; Relative Humidity: 48% Wind: WNW @ 20G33 kts Peak Wind: 38 MPH (33 knots) WNW @ 12:48 PM Sea-level pressure: 1018.9 mb; 30.08 in Hg; rising, then rising more rapidly Visibility: 75 miles 6-hr Max temp: 45F 6-hr Min temp: 37F 6-hr Precip: 0.00 ins. BHO SA 1755 50 SCT 75 189/44/26/2920G33/008/ PK WND 2933/48 8/100 53006 10045 20037 SUMMARY FOR THURSDAY, NOVEMBER 18, 2021 TEMPERATURE (DEGREES F) MAX.......69 NORMAL.....49 MIN.......49 NORMAL.....33 MEAN......59 NORMAL.....41 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL............... +18 TOTAL DEPARTURE FOR THE MONTH........................... +46 [+2.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY................6 DEPARTURE.......+18 TOTAL HEATING UNITS FOR THE MONTH..............332 DEPARTURE.......-47 TOTAL HEATING UNITS FOR THE SEASON.............659 DEPARTURE......-232 TOTAL HEATING UNITS LAST SEASON TO DATE........726 DEPARTURE...... -67 PEAK WIND GUST (MPH): Official (1-Sec AVG).......39 NW @ 11:37 P.M. AEROVANE...................36 WNW @ 10:57 P.M. VECTOR #2 (Instantaneous)..42 @ 11:37 P.M. DAVIS #2 ..................38 S @ 12:16 A.M. RMY #2 (Instantaneous).....42 NW @ 11:37 P.M. ASOS...........OUT OF SERVICE D/T RENOVATIONS VECTOR #1......OUT OF SERVICE D/T RENOVATIONS DAVIS #1.......OUT OF SERVICE D/T RENOVATIONS RMY #1.........OUT OF SERVICE D/T RENOVATIONS MERLIN.........OUT OF SERVICE D/T RENOVATIONS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................28 NW @ 11:37 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............28 @ 11:38 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............29 S @ 12:32 A.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE.................27 NW @ 11:38 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE RMY #1 AVERAGE.....OUT OF SERVICE D/T RENOVATIONS AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL....... 16.6 S [399 total miles] VECTOR #2................. 17.6 DAVIS #2.................. 17.4 SSW RMY #2.................... 17.9 SSW RMY #1..............OUT OF SERVICE D/T RENOVATIONS ASOS................OUT OF SERVICE D/T RENOVATIONS VECTOR #1...........OUT OF SERVICE D/T RENOVATIONS DAVIS #1............OUT OF SERVICE D/T RENOVATIONS PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.29 DEPARTURE.....+0.16 TOTAL PRECIPITATION FOR THE MONTH.............1.71 DEPARTURE.....-0.85 TOTAL PRECIPITATION FOR THE YEAR.............56.56 DEPARTURE....+10.10 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M.............0.0 DEPARTURE.......0.0 TOTAL SNOWFALL FOR THE MONTH...................0.0 DEPARTURE......-0.7 TOTAL SNOWFALL FOR THE SEASON (2021-2022)......0.0 DEPARTURE......-1.4 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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 11/01 59/41/50/+3/0.00/0.0/594/96 38 WNW AERO 39 WNW RMY 39 11/02 56/40/48/+1/0.00/0.0/247/40 25 SW AERO 25 SW RMY 26 11/03 51/35/43/-3/0.00/0.0/572/93 28 W AERO 25 W RMY 27 11/04 49/31/40/-6/0.00/0.0/446/73 17 NNE AERO 17 NNW RMY 16 11/05 49/32/41/-5/0.00/0.0/591/97 25 NW AERO 24 NW RMY 24 11/06 51/34/43/-2/0.00/0.0/595/98 18 SSW AERO 17 SW RMY 19 11/07 55/37/46/+1/0.00/0.0/514/85 17 W AERO 17 W RMY 16 11/08 60/38/49/+4/0.00/0.0/578/96 20 N AERO 18 N RMY 19 11/09 69/45/57/+13/0.00/0.0/582/97 21 W AERO 21 W RMY 22 11/10 60/44/52/+8/0.00/0.0/389/65 36 NW AERO 35 NW RMY 35 11/11 56/40/48/+5/0.00/0.0/501/84 26 SE AERO 28 SE RMY 27 11/12 61/45/53/+10/1.00/0.0/000/00 72 SSE AERO 78 SSE RMY 76 11/13 60/36/48/+5/0.32/0.0/556/94 53 SW AERO 53 SW RMY 54 11/14 47/33/40/-2/0.03/0.0/336/57 29 W AERO 28 W RMY 28 11/15 48/36/42/0/0.07/0.0/405/69 35 W AERO 36 W RMY 38 11/16 46/31/39/-3/0.00/0.0/.../.. 40 WNW AERO 41 WNW RMY 42 11/17 49/30/40/-1/0.00/0.0/.../.. 34 S AERO 36 S RMY 34 11/18 69/49/59/+18/0.00/0.0/.../.. 39 NW AERO 36 WNW RMY 42 11/19 The low since midnight is 37F, the daily normal low is 33F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR NOVEMBER 19 HIGH 72 IN 1941 LOW 10 IN 1936 PRECIP 1.92 INCHES IN 1926 SNOWFALL 11.0 INS IN 1986 PEAK GUST 59e E IN 1945 RECORDS FOR NOVEMBER 20 HIGH 72 IN 1953 LOW 9 IN 1894 PRECIP 2.78 INS IN 1988 SNOWFALL 3.0 INS IN 1897 PEAK GUST 73e S IN 1950 TODAY'S REPORT PREPARED BY: Andrew Swanson