BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 17, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
HEAT WAVE GETS UNDERWAY TODAY AT 3 DAYS
TEMPERATURE CLIMBS TO 92F BY 2 P.M. EDT 
MORNING LOW TEMPERATURE OF 74F LIKELY EQUALS RECORD AND
ALSO APPEARS TO BE WARMEST IN SOUTHERN NEW ENGLAND
 
The second heat wave of the month was established today with
3 days of 90 degrees or more.  Today maximum temperature
had reached 92F early this afternoon but was well short
of the record of 96F set in 1999.
 
The minimum temperature of 74F this morning would equal the
record high minimum established way back in 1900. Our low of
74F this morning appears to be the warmest overnight low in
all of southern New England with Boston's 73 degrees and
Worcester's 72 a close second and third respectively. 
The record highs of 96F over the next two days may be
challenged. (see listing below)
 
Today's Observations:
 
7 A.M.
Weather:  Clear, few altocumulus northwest and north-northeast
through east
Temperature: 79F; Dew Point: 70F; Wind: W at 2 kts, estimated
Sea-level pressure: 30.20 ins. Hg, rising then more
Visibility: 9 miles, hazy
6-hr min. temp: 74F
BHO SA 1155 CLR 9 226/79/70/E2602/020/ FEW AC NW AND NNE-E
HAZY WND LGT/ 8/030 51007 10079 20074
 
10 A.M.
Weather: Clear, cumulus forming except overhead-E-S,
moderate cumulus forming vicinity NNW-N, few cirrus SW-N 
Temperature: 87F; Dew Point: 70F; Wind: Estimated S at 6 kts,
Wind: Light 
Sea-level pressure: 30.18 ins. Hg, falling slightly
Visibility: 20 miles, except 15 miles NE-SE, 25 miles WNW, hazy
BHO SA 1455 CLR 20 221/87/70/1806/018/ CU FRMG XCPT OVHD-E-S
MDT CU VC NNW-N FEW CI SW-N VSBY NE-SE 15 WNW 25 HAZY ALQDS
WND LGT/ 8/201 58005
 
1 P.M.
Weather: Scattered cumulus, few moderate cumulus, scattered cirrus,
cirrus distant SW
Temperature: 89F; Dew Point: 68F; Wind: WNW at 8 kts,
Wind: Direction variable SSW-W
Sea-level pressure: 30.14 ins. Hg, falling
Visibility: 25 miles, except 20 NE-SE, 30 W-NW, hazy
6-hr max. temp: 92F
BHO SA 1755 40 SCT 250 SCT 25 208/89/68/2408/014/ FEW MDT CU ALQDS
CI DSNT SW VSBY NE-SE 20 W-NW 30 HAZY 20V28/ 8/201 57013 
10092 20079
 
WEATHER SUMMARY FOR TUESDAY, JULY 16, 2013
 
TEMPERATURE (DEGREES F)
MAX.....91     NORMAL.....81
MIN.....71     NORMAL.....63
MEAN....81     NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL.....................+9
TOTAL DEPARTURE FOR THE MONTH....................+76 [+4.6 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY................18 NNW AT 11:45 A.M.
                   AERO.....................16 NNW AT 11:45 A.M.
                   ASOS.....................18 NNW AT 11:45 A.M.
                   DAVIS....................15 NNW AT  1:03 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY..................12 NNW AT 11:45 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...............14 NW  AT 11:45 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..............12 NW  AT 11:44 A.M.
AVERAGE WIND SPEED AND DIRECTION...........7.9 NNW
                   ASOS....................7.8 
                   DAVIS...................7.0 NNW [340 deg.]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE............-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.01   DEPARTURE............-0.92
                         ASOS..............1.00
TOTAL PRECIPITATION FOR THE YEAR..........33.21   DEPARTURE............+4.31
                         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/+1/0.04/617/68         18 NE  AERO 20 MPH NE  RMY 20  TSTM
7/9  72/63/68/-4/0.01/054/06         14 ENE AERO 14 MPH ENE RMY 14
7/10 84/65/75/+3/T/335/37            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 TSTM
7/12 70/62/66/-6/0.00/.../..         29 NE  AERO 29 MPH NE  RMY 30
7/13 75/62/69/-3/0.08/.../..         21 ENE AERO 20 MPH ENE RMY N/A
7/14 89/71/80/+8/0.00/.../..         16 W   AERO 16 MPH W   RMY 16
7/15 91/72/82/+10/0.00/.../..        17 NW  AERO 16 MPH NW  RMY 18
7/16 91/71/81/+9/0.00/.../..         18 NNW AERO 16 MPH NNW RMY 16
 
7/17 morning low temp: 74F; 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 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971
 
RECORDS FOR JULY 18
HIGH 96F IN 1991, 1999
LOW 54F IN 1892, 1956, 1971
PRECIP 1.65 INS IN 2000
WIND 43e MPH SW IN 1949
 
RECORDS FOR JULY 19
HIGH 96F IN 1977, 1991
LOW 50F IN 1890
PRECIP 1.10 INS IN 1951
WIND 63 MPH SSW IN 1982
 
TODAY'S REPORT PREPARED BY: Robert Skilling/Marc Douglas