Monday, April 24, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 24, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNNY SKIES BECOME MOSTLY CLOUDY BY LATE MORNING
Morning skies were sunny with few altocumulus and scattered cirrus.
Conditions were favorable along the horizon for a mirage to form
making the mountains look larger than they are. More altocumulus
had moved in by 10:00AM EST and were a broken layer by the 1:00PM
observation.
Winds were light all day and started out of the southwest and west-
southwest this morning but had shifted out of the east by early
afternoon. Temperatures had risen to 67F at 1:00PM and were
continuing to rise past the last observation of the day.
Today’s Observations:
7 A.M.
Weather: Few distant altocumulus SSE-S, scattered cirrus, mountains
looming WNW-NW
Temperature: 48F; Dew Point: 36F; Wind: WSW at 6 kts,
Wind Speed: Light
Sea-level pressure: 30.17 ins. Hg, rising unsteadily
Visibility: 80 miles
6-hr Max temp: 48F
6-hr Min temp: 42F
24-hr precip: 0.00 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 250 SCT 80 217/48/36/2406/017/ FEW DSNT AC SSE-S WND LGT
LOOMING OF MTNS WNW-NW/ 8/031 52019 10048 20042
10 A.M.
Weather: Scattered altocumulus, broken cirrostratus
Temperature: 62F; Dew Point: 34F; Wind: estimated SW at 3 kts,
Wind Speed: Light
Sea-level pressure: 30.20 ins. Hg, rising, then more quickly
Visibility: 70 miles
BHO SA 1455 160 SCT E270 BKN 70 227/62/34/E2303/020/ WND LGT/ 8/036 53010
1 P.M.
Weather: Few altocumulus N-NNE, higher broken altocumulus, broken cirrus,
small fire 3 miles SSE with smoke plume drifting W
Temperature: 67F; Dew Point: 33F; Wind: E at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.18 ins. Hg, falling, then steady
Visibility: 70 miles
6-hr Max temp: 67F
6-hr Min temp: 48F
BHO SA 1755 E220 BKN 250 BKN 70 220/67/33/0805/018/ FEW AC N-NNE
SML FIRE 3 MI SSE THN K PLUME DRFTNG W WND LGT/ 8/052 55007 10067 20048
SUMMARY FOR SUNDAY, APRIL 23, 2017
TEMPERATURE (DEGREES F)
MAX…..65 NORMAL…..59
MIN…..37 NORMAL…..41
MEAN….51 NORMAL…..50
DEPARTURE FROM 30-YEAR NORMAL…………………….+1
TOTAL DEPARTURE FOR THE MONTH……………………+88 [+3.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..14 DEPARTURE……….-1
TOTAL HEATING UNITS FOR THE MONTH………….372 DEPARTURE………-81
TOTAL HEATING UNITS FOR THE SEASON………..5274 DEPARTURE……..-662
TOTAL HEATING UNITS LAST SEASON TO DATE……4876 DIFFERENCE…….+398
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….28 S AT 5:48 P.M.
AERO……………………26 S AT 5:48 P.M.
ASOS……………………28 S AT 5:47 P.M.
DAVIS…………………..25 SW AT 9:06 P.M. RMY 28
FASTEST MILE FOR YESTERDAY…………………22 S AT 5:47 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………22 S AT 5:48 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..19 SW AT 11:40 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.9 NW
ASOS………………….10.8
DAVIS………………….8.3 W [260 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……….5.03 DEPARTURE……+1.41
ASOS…………..5.08
TOTAL PRECIPITATION FOR THE YEAR……….19.15 DEPARTURE……+1.53
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE MONTH…………….2.7 DEPARTURE…….-0.1
TOTAL SNOWFALL FOR THE SEASON…………..66.4 DEPARTURE…….+3.9
PRELIMINARY CLIMATE SUMMARY FOR APRIL 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
4/1 35/31/33/-8/2.21/2.7/000/00 40 ENE AERO 41 ENE RMY 41
4/2 53/30/42/+1/0.00/0.0/552/72 32 NW AERO 33 NW RMY 34
4/3 60/35/48/+6/0.00/0.0/685/89 21 W* AERO 20 NW RMY N/A
4/4 42/35/39/-3/0.78/0.0/000/00 41 ESE AERO 43 ESE RMY 42
4/5 41/35/38/-5/0.00/0.0/000/00 21 NNW AERO 20 NNW RMY N/A
4/6 55/35/45/+2/1.27/0.0/000/00 35 SSE AERO 37 S RMY 37 TSTM
4/7 53/38/46/+3/0.00/0.0/226/29 43 SSW AERO 47 SSW RMY 48
4/8 50/34/42/-2/0.00/0.0/666/85 37 WNW AERO 40 WNW RMY 39
4/9 65/34/50/+6/0.00/0.0/716/91 23 W AERO 23 W RMY N/A
4/10 77/45/61/+16/0.00/0.0/560/71 37 S AERO 37 S RMY 39
4/11 85/50/68/+23/0.00/0.0/642/81 28 S AERO 28 S RMY 30
4/12 68/47/58/+13/0.01/0.0/382/48 26 WNW AERO 28 WNW RMY N/A
4/13 58/39/49/+3/0.00/0.0/567/71 28 WNW AERO 31 NW RMY 30
4/14 62/40/51/+5/0.00/0.0/801/100 22 NNW AERO 22 NNW RMY 24
4/15 68/40/54/+7/0.01/0.0/675/84 40 SSW AERO 45 SSW RMY 45
4/16 86/55/71/+24/T/0.0/758/94 38 W* AERO 39 SW RMY 42
4/17 75/48/62/+15/0.00/0.0/405/50 37 W AERO 37 W RMY 43
4/18 52/35/44/-4/0.00/0.0/779/96 25 ENE AERO 23 ENE RMY 25
4/19 54/34/44/-4/…./0.0/431/53 31 S AERO 33 S RMY 34
4/20 58/42/50/+1/…./0.0/270/33 25 SSW AERO 24 SSW RMY 23
4/21 45/42/44/-5/…./0.0/000/00 26 ESE AERO 29 ESE RMY 28
4/22 44/40/42/-7/…./0.0/…/.. 22 NE AERO 22 NNE RMY 20
4/23 65/37/51/+1/0.00/0.0/…/.. 28 S AERO 26 S RMY 28
4/23 Low temp since midnight is 42F; normal low is now 41F
DAILY RECORDS FOR APRIL 2017
4/11/17: DAILY RECORD MAXIMUM TEMPERATURE OF 85F,
BREAKS PREVIOUS RECORD OF 78F SET IN 1945
4/11/17: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 50F,
TIES WITH PREVIOUS RECORD SET IN 1955
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR APRIL 24
HIGH 82 IN 2001
LOW 22 IN 1930
PRECIP 2.51 INS IN 1898
SNOWFALL 1.2 INS IN 1967
PEAK GUST 59 MPH NW IN 1962
RECORDS FOR APRIL 25
HIGH 83 IN 2009
LOW 24 IN 1892
PRECIP 1.38 IN. IN 1901
SNOWFALL 0.7 IN. IN 2002
PEAK GUST 66 MPH SE IN 1968
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
