BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 14, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
EARLY MORNING CLOUDS BURN OFF, PARTLY SUNNY SKIES PREVAIL
HUMIDITY DROPS BUT DEW POINTS STILL IN THE 70'S
 
This morning started off very similarly to yesterday, with the summit here
shrouded in fog and stratus fractus drifting by. By 8:00 EST the lowest of
the stratocumulus had burned off and we enjoyed partly sunny skies with
cumulus humilis and a few moderate/towering cumulus. Winds were very light
again today, mainly out of the W at around 5 MPH. I made a mistake in
yesterdays precipitation summary, which I have corrected for today.
 
Today's Observations:
 
7 A.M.
Weather: Sun visible through overcast stratocumulus, foggy with stratus
fractus drifting over the summit
Temperature: 73F; Dew Point: 73F; Wind: WNW at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.33 ins. Hg, decreasing then increasing
Visibility: 2 miles, foggy
Visibility: Variable, 1/2 mile N-NNE and ESE-S
24-hr precip: Trace
6-hr min. temp: 71F
BHO SA 1155 010 OVC 2-F 271/73/73/2902/033/ SUN VSBL THRU BINOVC
LOW STFRA DFTNG NNW-NNE AND ESE-SE AND OVR SMT WIND LGHT AND VBL/
8/2// 53008 7000T 10073 20071
 
10 A.M.
Weather: Scattered cumulus humilis, few moderate/towering cumulus SSE-SW,
cirrostratus distant E-SSE
Temperature: 83F; Dew Point: 73F; Wind: W at 6 kts,
Wind: Light and variable
Sea-level pressure: 30.30 ins. Hg, decreasing then decreasing more slowly
Visibility: 50 miles, light haze
BHO SA 1455 035 SCT 50 262/83/73/2706/030/ FEW MDT/T CU SSE-SW CS DSNT E-SSE
WIND LT AND VBL LT HZ/ 8/206 56009
 
1 P.M.
Weather: Scattered cumulus congestus, few moderate/towering cumulus SSW,
scattered stratocumulus distant ESE-WNW
Temperature: 84F; Dew Point: 71F; Wind: WNW at 6 kts,
Sea-level pressure: 30.28 ins. Hg, decreasing then decreasing more rapidly
Visibility: 70 miles, light distant haze
6-hr max. temp: 85F
BHO SA 1755 070 SCT 70 253/84/71/3006/028/ FEW MDT/TCU SSW
SCT SC DSNT ESE-WNW LT DSNT HZ/ 8/400 58009 10085 20073
 
 
WEATHER SUMMARY FOR SATURDAY, JULY 13, 2013
 
TEMPERATURE (DEGREES F)
MAX.....75     NORMAL.....81
MIN.....62     NORMAL.....63
MEAN....69     NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL.....................-3
TOTAL DEPARTURE FOR THE MONTH....................+49 [+3.8 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY................21   ENE  AT  5:36 A.M.
                   AERO.....................20   ENE  AT  5:46 A.M.*
                   ASOS.....................22   NE   AT  5:45 A.M.
                   DAVIS....................21   ENE  AT  5:44 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY..................14.5 ENE  AT  5:44 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...............15   ENE  AT  5:37 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..............14    NE  AT  5:37 A.M.
AVERAGE WIND SPEED AND DIRECTION...........6.5 ENE
                   ASOS....................6.4
                   DAVIS...................5.9 ENE [70 deg]
*Denotes the latest of multiple occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....Trace  DEPARTURE............-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.01   DEPARTURE............-0.51
                         ASOS..............1.00
TOTAL PRECIPITATION FOR THE YEAR..........33.21   DEPARTURE............+4.72
                         ASOS..............N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals 
     
PRELIMINARY CLIMATE SUMMARY FOR JULY 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
                             
7/1  82/69/76/+6/0.05/247/27         29 S   AERO 31 MPH SSW RMY 32
7/2  82/61/72/+2/T/100/11            23 SSW AERO 23 MPH SSW RMY 25
7/3  87/62/75/+4/T/556/61            28 SW  AERO 30 MPH SW  RMY 30
7/4  90/71/81/+10/0.00/811/89        25 WSW AERO 26 MPH SW  RMY 28
7/5  92/73/83/+12/0.00/874/96        24 W   AERO 25 MPH WSW RMY 25
7/6  90/73/82/+11/0.00/836/92        25 WNW AERO 25 MPH WNW RMY 26
7/7  91/72/82/+11/0.21/508/56        38 SSW AERO 43 MPH SSW RMY 44  TSTM
7/8  82/64/73/+1/0.04/.../..         18 NE  AERO 20 MPH NE  RMY 20  TSTM
7/9  72/63/68/-4/0.01/.../..         14 ENE AERO 14 MPH ENE RMY 14 
7/10 84/65/75/+3/T/.../..            32 S   AERO 36 MPH S   RMY 35
7/11 79/69/74/+2/0.62/.../..         23 W   AERO 23 MPH W   RMY N/A
7/12 70/62/66/-6/0.07/.../..         29 NE  AERO 29 MPH NE  RMY 30
7/13 75/62/69/-3/T/.../..            21 ENE AERO 20 MPH ENE RMY N/A
 
7/14 morning low temp: 69F; the normal low is now 63F
 
DAILY RECORDS FOR JULY 2013
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
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]
 
RECORDS FOR JULY 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002
 
TODAY'S REPORT PREPARED BY: Forrest Iwanik