BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 13, 2015    
ALL TIMES ARE IN EASTERN STANDARD TIME

BRIGHT SUN YESTERDAY BROUGHT TEMPERATURES ABOVE 60F 
[68F] FOR THE FIRST TIME SINCE DECEMBER 25 AND MORE 
60-DEGREE WEATHER CONTINUES 
 
Yesterday our maximum temp. of 68F was the first time the 
temperature had reached 60 degrees since 61F on December 25, 
2014. Today's high temperature was approaching 70F and if it
does, it will be our first 70-degree reading since 73F on 
October 29, 2014!  
 
Latest Houghton's Pond Thaw Date, (1886-2015)
 
1) April 14, 1926
2) April 10, 1887
   April 10, 1888
   April 10, 2015
4) April 9, 1923
5) April 8, 1993
6) April 7, 1899
   April 7, 1956
8) April 6, 1916
   April 6, 1917
   April 6, 1924
   April 6, 1940
 
Latest Ponkapoag Pond Thaw Date, (1886-2015)
 
1) April 11, 2015
2) April 10, 1926
3) April 9, 1923
4) April 6, 1940
5) April 5, 1916
   April 5, 1924
7) April 4, 1967
   April 4, 1994
9) April 3, 1904
   April 3, 1920
 
 
-----------------------------------------------------
 
Today's Observations:
 
7 A.M.
Weather: Scattered cirrus/cirrostratus S-W invading
Temperature: 51F; Dew Point: 29F; Wind: SSW at 8 kts,
Sea-level pressure: 30.37 ins. Hg, increasing then more quickly
Visibility: 30 miles, hazy, smoke layer near and above the
horizon S-W-NNW
6-hr Max temp: 51F
6-hr Min temp: 47F
BHO SA 1155 250 -SCT 30 283/51/29/2108/037/ CI LYRS S-W INVDNG
K LYR NR/ABV HRZN S-W-NNW HAZY/ 8/005 53016 10051 20047 
 
10 A.M.
Weather: Scattered dense cirrus (SE-SW), thin scattered cirrus
Temperature: 65F; Dew Point: 28F; Wind: SSW at 10 kts,
Sea-level pressure: 30.35 ins. Hg, falling slightly
Visibility: 35 miles, except 45 WNW, distant haze
BHO SA 1455 220 SCT 250 -SCT 35 279/65/28/2010/035/ DNS CI LYR 
SE-SW CLR SKY NW-NE VSBY WNW 45 HZY ALQDS/ 8/006 58004 
 
1 P.M.
Weather: Scattered dense cirrus, scattered cirrus
Temperature: 66F; Dew Point: 28F; Wind: S at 12G25 kts
Sea-level pressure: 30.28 ins. Hg, falling then more slowly
Visibility: 40 miles, except 50 WNW, distant haze 
6-hr Max temp: 69F
6-hr Min temp: 51F
BHO SA 1755 200 SCT 220 SCT 250 SCT 40 254/66/28/1912G25/028/
DNS CI/CI ESE-W CLR SKY NE-SE VSBY WNW 50 DSNT HZ/ 8/002 56025 
10069 20051
 
 
SUMMARY FOR SUNDAY, APRIL 12, 2015
 
TEMPERATURE (DEGREES F)
MAX.....68   NORMAL.....54
MIN.....35   NORMAL.....36
MEAN....52   NORMAL.....45
 
DEPARTURE FROM 30-YEAR NORMAL.......................+7
TOTAL DEPARTURE FOR THE MONTH......................-15 [-1.5 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............13  DEPARTURE...........-7
TOTAL HEATING UNITS FOR THE MONTH.............277  DEPARTURE..........+15    
TOTAL HEATING UNITS FOR THE SEASON...........6020  DEPARTURE.........+274
TOTAL HEATING UNITS LAST SEASON TO DATE......5838  DIFFERENCE........+182
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................23 WNW AT   2:53 P.M.   
                   ASOS.......................24 WNW AT  12:20 A.M.    
                   DAVIS......................23 WNW AT   2:53 P.M. RMY 23
FASTEST MILE FOR YESTERDAY....................18 WNW AT  12:29 A.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE.................18 WNW AT  12:30 A.M.     
MAXIMUM 2-MINUTE DAVIS AVERAGE................17 WNW AT  12:30 A.M.    
AVERAGE WIND SPEED AND DIRECTION............10.3 W       
                   ASOS.....................11.0   
                   DAVIS.....................9.2 W [260 degrees]
* Last of several occurrences...

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.....-0.17
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........1.43  DEPARTURE.....-0.61 
                         ASOS...............1.38
TOTAL PRECIPITATION FOR THE YEAR...........16.02  DEPARTURE.....+0.11
                         ASOS................N/A ***
*** ASOS annual totals not available due to erroneous readings
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M...........0.0  DEPARTURE.....-0.1
TOTAL SNOWFALL FOR THE MONTH...............Trace  DEPARTURE.....-1.9
TOTAL SNOWFALL FOR THE SEASON..............150.8  DEPARTURE....+89.2
 
PRELIMINARY CLIMATE SUMMARY FOR APRIL CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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
 
4/1  44/26/35/-6/0.00/0.0/748/98              30 WNW RMY 31
4/2  59/29/44/+3/T/0.0/375/49                 39 SSW RMY 43
4/3  56/47/52/+10/0.02/0.0/000/00             36 SW  RMY N/A
4/4  49/32/41/-1/..../0.0/501/65              54 NW  RMY 64
4/5  47/30/39/-4/..../0.0/464/60              40 W   RMY 45
4/6  48/33/41/-2/0/00/0.0/544/70              18 NE  RMY N/A 
4/7  39/34/37/-6/..../0.0/000/00              21 NE  RMY N/A
4/8  41/32/37/-7/..../T/000/00                30 ENE RMY 32
4/9  35/32/34/-10/..../0.0/000/00             31 ENE RMY 32
4/10 53/35/44/-1/..../0.0/000/00              31 SW  RMY N/A
4/11 56/38/46/+1/0.00/0.0/.../..              39 WNW RMY 48
4/12 68/35/52/+7/0.00/0.0/.../..              23 WNW RMY 23 
 
4/13 low since midnight is 47F normal low is 37F
 
DAILY RECORDS FOR APRIL 2015
 
4/3 - NEW RECORD DAILY HIGH MINIMUM TEMPERATURE: 47F
      surpasses the previous record of 46F in 1892
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated): 
 
RECORDS FOR APRIL 13
HIGH 85 IN 1945
LOW 22 IN 1939
PRECIP 2.51 IN. IN 2004
SNOWFALL 6.8 IN. IN 1933
PEAK GUST 59 MPH SSW IN 1995
 
RECORDS FOR APRIL 14
HIGH 80 IN 1945
LOW 21 IN 1923
PRECIP 2.22 IN. IN 1895
SNOWFALL 8.4 IN. IN 1953
PEAK GUST 71e MPH W IN 1943
 
TODAY'S REPORT PREPARED BY:  Robert Skilling