Thursday, July 13, 2017
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 13, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME
COLD FRONT KEEPS DAY CHILLY AND CLOUDY
Additional storms moved through the area yesterday afternoon
when we had our peak gust of 23 MPH out of the northeast.
Nearly all of yesterday’s 0.43 inches of precip. fell within
a 15 minute time span during the storm. Winds have since
remained out of the northeast.
A cold front is now moving through the region to the south.
Temperatures have been falling since midnight from a max.
for the day of 68F to the minimum so far of 59F. Visibility
ranged from 1/16 mile to 15 miles as fog began to lift.
Only a trace of precip. was measured since 7AM EST.
Today’s Observations:
7 A.M.
Weather: Light drizzle, sky obscurement due to fog
Temperature: 64F; Dew Point: 64F; Wind: ENE at 8 kts
Sea-level pressure: 30.01 ins. Hg, rising then falling
Visibility: 1/16 mile
6-hr Max temp: 68F
6-hr Min temp: 64F
24-hr precip: 0.43 inches
BHO SA 1155 W2 X 1/16L-F 162/64/64/0608/001/ 8//// 50003
MANUAL 70043 AS0S 70042 10068 20064
10 A.M.
Weather: Light drizzle, sky obscurement due to fog
Temperature: 60F; Dew Point: 60F; Wind: NNE at 11G20 kts
Sea-level pressure: 30.02 ins. Hg, rising then falling
Visibility: 1/8 mile
BHO SA 1455 W3 X 1/8L-F 166/60/60/0311G20/002/ 8//// 51004
MANUAL 600//
1 P.M.
Weather: Overcast stratus
Temperature: 59F; Dew Point: 57F; Wind: NNE at 12G21 kts
Sea-level pressure: 30.04 ins. Hg, falling then rising
Visibility: 10 miles, except 15 miles ESE-SSW, distant fog in
all directions
6-hr Max temp: 64F
6-hr Min temp: 59F
BHO SA 1755 E11 OVC 10 174/59/57/0212G21/004/ VSBY ESE-SSW 15
DSNT FG ALQDS/ 8/6// 53008 MANUAL 600// 10064 20059
SUMMARY FOR WEDNESDAY, JULY 12, 2017
TEMPERATURE (DEGREES F)
MAX…..85 NORMAL…..81
MIN…..68 NORMAL…..63
MEAN….77 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL…………………….+5
TOTAL DEPARTURE FOR THE MONTH……………………+26 [+2.0 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..12 DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE MONTH………….101 DEPARTURE………+23
TOTAL COOLING UNITS FOR THE SEASON…………302 DEPARTURE………+95
TOTAL COOLING UNITS LAST SEASON TO DATE…….223 DEPARTURE………+79
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….23 NE AT 3:10 P.M.
AERO……………………22 NE AT 3:08 P.M.
ASOS……………………21 ENE AT 3:12 P.M.
DAVIS…………………..21 NE AT 3:08 P.M. RMY 23
FASTEST MILE FOR YESTERDAY…………………16 NE AT 3:09 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 NW AT 6:57 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 NE AT 3:11 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..6.8 WSW
ASOS…………………..7.5
DAVIS………………….5.5 WSW [252 DEG.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.43 DEPARTURE……+0.30
ASOS…………..0.42
TOTAL PRECIPITATION FOR THE MONTH……….1.46 DEPARTURE……+0.08
ASOS…………..1.44
TOTAL PRECIPITATION FOR THE YEAR……….32.83 DEPARTURE……+4.48
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings
PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
7/1 85/67/76/+6/T/439/48 35 S AERO 37 S RMY 38
7/2 87/69/78/+8/T/785/86 25 W* AERO 28 W* RMY 27
7/3 85/67/76/+5/0.00/894/98 28 W* AERO 29 W RMY 30
7/4 84/62/73/+2/0.00/783/86 17 W AERO 17 W RMY 18
7/5 82/62/72/+1/0.00/855/94 20 S AERO 20 ENE RMY 20
7/6 82/60/71/+0/0.00/664/73 21 SSW AERO 22 SSW RMY 21
7/7 71/60/66/-5/0.63/000/00 28 ENE AERO 28 ENE RMY 27
7/8 84/61/73/+1/0.15/…/.. 30 SW* AERO 32 SSW RMY 33
7/9 81/60/71/-1/0.00/…/.. 26 W AERO 26 W RMY 26
7/10 85/63/74/+2/T/…/.. 25 SW AERO 25 S RMY 26
7/11 82/66/74/+2/0.25/…/.. 24 S AERO 24 S RMY N/A
7/12 85/68/77/+5/0.43/…/.. 23 NE AERO 22 NE RMY 23
7/13 Low temp since midnight is 62F; normal low is now 63F
DAILY RECORDS FOR JULY
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 13
HIGH 95F IN 1894
LOW 52F IN 1888, 1895, 1939, 1973
PRECIP 3.54 INS IN 1996
WIND 55 MPH SE IN 1996
RECORDS FOR JULY 14
HIGH 98F IN 1952
LOW 51F IN 1895, 1937
PRECIP 1.97 INS IN 1960
WIND 110e MPH NW IN 1942 [RECORD FOR MONTH]
TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle
