Sunday, April 28, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, APRIL 28, 2024 ALL TIMES ARE IN EASTERN STANDARD TIME (EST) SUNRISE: 0443E SUNSET:  1841E FEW LIGHT SHOWERS PRE-DAWN, INCREASING SUNSHINE THIS AFTERNOON…. The day started on the cloudy side with a few light showers passing through during the wee hours of the morning. 0.02″ of rain was measured in the rain gauge this morning. Clouds have thinned early this afternoon with an increasing amount of sunshine. This is allowing temperatures to warm nicely as we progress through the afternoon. Temperatures have reached 60F by the 1pm observation, destined for the low to mid 60s by later in the day. These readings are generally about normal for this time of year. The dew point has been higher today than in recent days with readings in the 40s. Winds have been fairly steady today, gradually backing from the west-southwest to the south. The average speed for the day so far is around 12mph. The peak gust to this point is 28mph, which occurred way back around 12:30am. Visibility has been limited today due to haziness, in part due to the increased moisture in the air. The view has been generally around or just under 35 miles all day. The maximum temperature so far today is 61F degrees, which is 1 degree below the normal high of 62F. The minimum temperature since midnight is 41F degrees, which is 2 degrees below the normal low of 43F. ————————————————————– Today’s Observations: 7 A.M. Weather: Broken stratocumulus, broken altocumulus, broken cirrus Temperature: 46F; Dew Point: 41F; Relative Humidity: 80% Wind: SW @ 10G17 kts Sea-level pressure: 1024.3 mb; 30.25 in. Hg: falling unsteadily Visibility: 30 miles, hazy 6-hr Max temp: 46F 6-hr Min temp: 41F 24-hr Precip:  0.02 inches 24-hr Snowfall: 0.0 inches Snow Depth: 0 inches BHO SA 1155 E30 BKN 75 BKN 250 BKN 30 243/46/41/2210G17/025/ HAZY/ 8/551 57007 6002/ 70002 10046 20041 10 A.M. Weather: Overcast stratocumulus Temperature: 52F; Dew Point: 44F; Relative Humidity: 75% Wind: SSW @ 10 kts Sea-level pressure: 1022.4 mb; 30.19 in. Hg: falling, then more slowly Visibility: 25 miles, hazy 3-hr Precip:  0.00 inches 3-hr Snowfall: 0.0 inches BHO SA 1455 E16 OVC 25 224/52/44/2110/019/ HAZY/ 8/5// 56019 1 P.M. Weather: Thin broken cirrus, few altocumulus distant NNE-SE-SSW Temperature: 60F; Dew Point: 48F; Relative Humidity: 64% Wind: SW @ 9 kts Sea-level pressure: 1019.9 mb; 30.12 in. Hg: falling, then more rapidly Visibility: 35 miles, hazy 6-hr Max temp: 61F 6-hr Min temp: 46F 6-hr Precip:  0.00 inches 6-hr Snowfall: 0.0 inches Snow Depth: 0 inches BHO SA 1755 E250 -BKN 35 199/60/48/2209/012/ FEW AC DSNT NNE-SE-SSW HAZY/ 8/051 58025 10061 20046 ————————————————————– SUMMARY FOR SATURDAY, APRIL 27, 2024 TEMPERATURE (DEGREES F) MAX…….66   NORMAL…..61 MIN…….37   NORMAL…..42 MEAN……52   NORMAL…..52 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..0 TOTAL DEPARTURE FOR THE MONTH…………………….+9 [+0.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024) TOTAL HEATING UNITS FOR YESTERDAY……………13  DEPARTURE………0 TOTAL HEATING UNITS FOR THE MONTH…………..500  DEPARTURE……..-2 TOTAL HEATING UNITS FOR THE SEASON…………5141  DEPARTURE……-708 TOTAL HEATING UNITS LAST SEASON TO DATE…….4930  DEPARTURE……+211 PEAK WIND GUST (MPH): Note: Instruments designated #1 = Main Tower, #2 = South Tower, F420C, Contacting, Merlin, and Richards are all Main Tower. E=Estimated F420C (Official)……….E26 SW   @  07:34 P.M. VECTOR #1 (1-Sec)……….27 SW   @  07:34 P.M. VECTOR #2 (1-Sec)……….27 SSW  @  07:34 P.M. DAVIS #1……………….28 S    @  05:37 P.M. DAVIS #2 ………………32 S    @  03:44 P.M. RMY #1 (Instantaneous)…..27 SSW  @  05:36 P.M. RMY #2 (Instantaneous)…..28 SSW  @  07:34 P.M. MERLIN………………….M RICHARDS (C5C) (Inst)……26      @  05:36 P.M. FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL………………20 SSW  @  07:23 P.M. MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20      @  07:36 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21      @  07:35 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 S    @  03:50 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 S    @  03:45 P.M. MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 SW   @  07:36 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 SSW  @  07:35 P.M. MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19      @  03:50 P.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL……10.4 SW [250 total miles] VECTOR #1…………….10.6 VECTOR #2…………….10.9 DAVIS #1……………..10.4 SW DAVIS #2……………..11.0 SW RMY #1……………….10.5 SW RMY #2……………….10.9 SW RICHARDS (C5C)………..10.5 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.13 TOTAL PRECIPITATION FOR THE MONTH…………..4.32 DEPARTURE…..-0.01 TOTAL PRECIPITATION FOR THE YEAR (2024)…….24.37 DEPARTURE…..+6.02 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.1 TOTAL SNOWFALL FOR THE MONTH………………..0.7 DEPARTURE……-2.1 TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.8 DEPARTURE…..-42.9 ————————————————————– PRELIMINARY CLIMATE SUMMARY FOR APRIL CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) 4/1   56/40/48/+7/0.00/0.0/153/20         20 SSE VEC1 20 SSE RMY 19 4/2   47/35/41/0/0.07/0.0/115/15          25 E   VEC1 25 E   RMY 25 4/3   41/34/38/-4/1.10/T/000/00           53 E   VEC1 53 E   RMY 53 4/4   36/32/34/-8/1.25/0.7/000/00         63 ENE VEC1 64 ENE RMY 68 4/5   45/31/38/-5/0.01/T/147/19           33 WNW VEC1 31 WNW RMY 33 4/6   43/33/38/-5/0.08/093/12             35 N   VEC1 35 N   RMY 35 4/7   48/34/41/-3/T/0.0/094/12            32 N   VEC1 31 N   RMY 31 4/8   66/36/51/+7/0.00/0.0/636/81         23 WNW VEC1 23 WNW RMY 22 4/9   63/40/52/+8/0.00/0.0/741/94         22 ENE VEC1 21 ENE RMY 21 4/10  65/38/52/+7/T/0.0/348/44            26 S   VEC1 26 S   RMY 30 4/11  55/42/49/+4/0.04/0.0/000/00         32 SSE VEC1 32 SSE RMY 31 4/12  60/46/53/+7/1.03/0.0/032/04         62 SSE VEC1 62 S   RMY 63 4/13  54/43/49/+3/T/0.0/271/34            43 W   VEC1 42 WNW RMY 46 4/14  58/42/50/+3/0.09/0.0/384/48         33 WSW VEC1 33 WSW RMY 35 4/15  73/43/58/+11/T/0.0/764/95           33 NW  VEC1 33 NW  RMY 34 4/16  68/44/56/+9/0.00/0.0/759/94         29 NW  VEC1 28 NW  RMY 29 4/17  60/40/50/+2/0.00/0.0/656/81         25 ESE VEC1 24 ESE RMY 24 4/18  47/40/44/-4/0.21/0.0/000/00         25 E   VEC1 25 E   RMY 23 4/19  60/41/51/+2/T/0.0/399/49            29 S   VEC1 29 S   RMY 29 4/20  57/40/49/0/0.38/0.0/082/10          34 WNW VEC1 37 WNW RMY 39 4/21  50/34/42/-8/0.00/0.0/295/36         30 NW  VEC1 30 WNW RMY 31 4/22  57/34/46/-4/0.00/0.0/822/100        29 NW  VEC1 29 NW  RMY 29 4/23  63/37/50/0/0.00/0.0/710/86          30 S   VEC1 29 S   RMY 29 4/24  63/33/48/-3/0.04/0.0/265/32         52 WNW VEC1 51 WNW RMY 58 4/25  55/29/42/-9/0.00/0.0/831/100        28 SE  VEC1 28 SE  RMY 26 4/26  56/32/44/-8/0.00/0.0/…/..         25 S   VEC1 24 S   RMY 24 4/27  66/37/52/0/0.00/0.0/…/..          26 SW  VEC1 27 SW  RMY 27 4/28 The low since midnight is 41F, the daily normal low is 43F. ————————————————————– APRIL DAILY RECORDS TO DATE NONE… ————————————————————– DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR APRIL 28 HIGH 92 IN 1990, 2009 LOW 26 IN 1947 PRECIP 2.41 IN 1904 SNOWFALL 10.0 IN. IN 1987 PEAK GUST 69 MPH NE 1967 RECORDS FOR APRIL 29 HIGH 85 IN 1974 LOW 26 IN 1909 PRECIP 1.65 IN 1923 SNOWFALL 1.0 IN. IN 1987 PEAK GUST 55 MPH WNW IN 2010 TODAY’S REPORT PREPARED BY: Matt Douglas