BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, FEBRUARY 23, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME SPRINGLIKE WITH LIMITED VISIBILITY AND A WARM WESTERLY WIND.... Today we continue to experience milder weather, with almost clear skies. However, visibility is limited to only 35 miles due to a distant haze. Humidity is low like yesterday's, reaching 30% by the 1 P.M. observation. Wind has increased from the west, reaching 24 mph after noontime. Many hikers are out on the hill today due to the exceptional weather, and the observatory is open until 4 P.M. if anyone wants to pay us a visit. The high so far today is 51F degrees, this is 12 degrees above the normal of 39F. The low since midnight is 30F, 9 degrees above the normal daily minimum of 21F. Today's Observations: 7 A.M. Weather: Few cirrostratus Temperature: 31F; Dew Point: 15F; Relative Humidity: 49% Wind: WSW at 10 kts Sea-level pressure: 30.17 ins. Hg: falling then rising Visibility: 35 miles, distant haze 6-hr Max temp: 32F 6-hr Min temp: 30F 24-hr Precip: 0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 CLR 35 217/31/15/2410/017/ FEW CS DSNT HZ ALQDS/ 8/008 51006 10032 20030 10 A.M. Weather: Few cirrostratus Temperature: 43F; Dew Point: 22F; Relative Humidity: 43% Wind: W at 7 kts Sea-level pressure: 30.17 ins. Hg: steady Visibility: 35 miles, distant haze 3-hr Precip: 0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 CLR 35 217/43/22/2607/017/ FEW CS DSNT HZ ALQDS/ 8/008 54000 1 P.M. Weather: Few cirrostratus Temperature: 51F; Dew Point: 20F; Relative Humidity: 30% Wind: W at 12G20 kts Sea-level pressure: 30.10 ins. Hg: falling, then more quickly Visibility: 35 miles, distant haze 6-hr Max temp: 51F 6-hr Min temp: 31F 6-hr Precip: 0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 CLR 35 195/51/20/2712G20/010/ FEW CS DSNT HZ ALQDS/ 8/008 58022 10051 20031 SUMMARY FOR SATURDAY, FEBRUARY 22, 2020 TEMPERATURE (DEGREES F) MAX.....44 NORMAL.....38 MIN.....23 NORMAL.....20 MEAN....34 NORMAL.....29 DEPARTURE FROM 30-YEAR NORMAL....................+5 TOTAL DEPARTURE FOR THE MONTH...................+98 [+4.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............31 DEPARTURE........-5 TOTAL HEATING UNITS FOR THE MONTH..............729 DEPARTURE.......-99 TOTAL HEATING UNITS FOR THE SEASON............3958 DEPARTURE......-401 TOTAL HEATING UNITS LAST SEASON TO DATE.......4255 DEPARTURE......-297 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................26 W AT 12:00 P.M. AERO.........................24 W AT 12:01 P.M. ASOS.........................27 W AT 12:01 P.M. DAVIS........................28 W AT 12:00 P.M. RMY 27 FASTEST MILE FOR YESTERDAY......................21 W AT 2:38 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................20 W AT 2:39 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 W AT 12:01 P.M. AVERAGE WIND SPEED AND DIRECTION..............13.5 W ASOS.......................13.7 DAVIS......................13.8 WSW [257 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.20 DEPARTURE......-0.90 ASOS..............2.30 TOTAL PRECIPITATION FOR THE YEAR...........3.66 DEPARTURE......-3.79 ASOS..............3.84 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.......-0.6 TOTAL SNOWFALL FOR THE MONTH................0.6 DEPARTURE......-10.4 TOTAL SNOWFALL FOR THE SEASON..............24.8 DEPARTURE......-19.3 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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 02/01 38/30/34/+8/0.01/T/..../.. 14 WSW AERO 14 WSW RMY N/A 02/02 40/30/35/+9/0.00/0.0/..../.. 18 W AERO 18 WNW RMY 18 02/03 44/27/36/+10/0.00/0.0/..../.. 28 W AERO 28 W RMY 28 02/04 44/33/39/+13/0.00/0.0/..../.. 19 E AERO 16 E RMY 18 02/05 41/30/36/+10/0.00/0.0/..../.. 20 NNW AERO 19 NNW RMY N/A 02/06 31/30/34/+8/0.00/0.0/..../.. 29 E AERO 28 E RMY 27 02/07 53/25/39/+12/..../0.1/..../.. 71 WSW AERO 71 SSW RMY 73 02/08 33/20/27/0/T/T/..../.. 46 W AERO 44 W RMY 44 02/09 33/15/24/-3/T/T/..../.. 30 SSE AERO 29 SSE RMY N/A 02/10 42/33/38/+11/..../0.0/..../.. 39 SSW AERO 39 SSW RMY 39 02/11 40/36/38/+11/..../0.0/..../.. 24 W AERO 23 W RMY N/A 02/12 41/30/36/+9/0.00/0.0/..../.. 37 W AERO 36 W RMY N/A 02/13 35/31/34/+6/.00/0.0/..../.. 29 SSW AERO 29 SSW RMY N/A 02/14 33/8/21/-7/0.00/0.0/..../.. 32 WNW AERO 32 NW RMY 34 02/15 27/4/16/-12/0.00/0.0/..../.. 31 SSW AERO 31 SSW RMY N/A 02/16 40/23/32/+4/0.00/0.0/..../.. 38 SW AERO 38 SW RMY N/A 02/17 44/28/36/+8/0.00/0.0/..../.. 25 WNW AERO 24 WNW RMY 24 02/18 37/27/32/+3/0.31/T/..../.. 26 SE AERO 26 SE RMY N/A 02/19 42/25/34/+5/0.00/0.0/.../.. 45 W AERO 46 W RMY 44 02/20 31/18/25/-4/0.00/0.0/.../.. 32 W AERO 32 W RMY N/A 02/21 30/11/21/-8/0.00/0.0/.../.. 24 NNW AERO 21 N RMY N/A 02/22 44/23/34/+5/0.00/0.0/.../.. 26 W AERO 24 W RMY 27 02/23 The low since midnight is 23F, daily normal minimum is 21F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 23 HIGH 67F IN 2017 LOW -8F IN 1907 PRECIP 1.48 INCHES IN 1967 SNOWFALL 10.6 INCHES IN 1967 PEAK GUST 73 MPH WNW IN 1974 RECORDS FOR FEBRUARY 24 HIGH 71F IN 2017 LOW -11F IN 1894 PRECIP 3.10 INCHES IN 1969 SNOWFALL 27.4 INCHES IN 1969 [HIGHEST CALENDAR DAY AMOUNT ON RECORD] PEAK GUST 63 MPH NE IN 1998 TODAY'S REPORT PREPARED BY: Benjamin Turner