BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 21, 2014 PATRIOTS DAY AND MARATHON MONDAY
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SUNNY EASTER WEEKEND...TEMPERATURES WARM TODAY
 
The long three-day weekend began with mild sunny
weather on Saturday, sunny but much cooler weather
for Easter Sunday when the high was only 58F. The
normal high is now in the upper 50's.
Today has become much warmer with temperatures
rising into the 60's along with very dry air.
 
Today's Observations:
 
7 A.M.
Weather: Scattered cirrus, thin scattered cirrus, stratus
layer along horizon ESE-SSW, thin fog below inversion with
the estimated top 6 hundred east, thin fog below inversion
in all quadrants
Temperature: 40F; Dew Point: 36F; Wind: SSW at 8 kts.
Sea-level pressure: 30.22 ins. Hg, falling slightly
Visibility: 15 miles, except 50 miles above inversion WNW,
6-hr max temp: 40F
6-hr min temp:  36F
BHO SA 1155 250 SCT 300 –SCT 15 233/40/36/1908/022/ STRA LYR ALG HRZN
ESE-SSW THN F BLO INVSN NE-S ESTMTD TOP 6 HND E SLWLY DSSPTNG
THN K LYR ALG HRZN W BLO INVCNG VSBY 50 WNW ABV INVSN
8/601 58005 10040 20036
 
10 A.M.
Weather: Scattered cirrus, thin broken cirrus 
Temperature: 54F; Dew Point: 25F; Wind: SW at 9  kts,
Wind: Direction variability S to WSW
Sea-level pressure: 30.16 ins. Hg, falling then more rapidly
Visibility: 60 miles, light distant haze 
BHO SA 1455 220 SCT 250 –BKN 60 215/54/25/2209/016/ VSBY NW 70
LGT DSNT HZ WND 18V24/ 8/001 58018
 
1 P.M. 
Weather: Scattered cirrus, thin broken cirrus (2 levels),
few altocumulus distant WNW-NW 
Temperature: 64F; Dew Point: 24F; Relative humidity: 21%; Wind: S at 7 kts 
Wind: Direction variable ESE-SW
Sea-level pressure: 30.05 ins. Hg, steady, then falling steadily
Visibility: 70 miles, light distant haze 
6-hr. max. temp: 65F
6-hr. min. temp: 40F 
BHO SA 1755 220 SCT 250 –BKN 300 –BKN 70 177/64/24/1707/005/
FEW AC DSNT WNW-NW LGT DSNT HZ WND 11V22/ 8/041 57038 10065 20040

 
WEATHER SUMMARY FOR SUNDAY, APRIL 20, 2014 EASTER SUNDAY
 
TEMPERATURE (DEGREES F)
MAX.....52    NORMAL.....58
MIN.....36    NORMAL.....40
MEAN....44    NORMAL.....49
 
DEPARTURE FROM 30-YEAR NORMAL.........................-5
TOTAL DEPARTURE FOR THE MONTH........................+42 [+1.9 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............21  DEPARTURE..........+4
TOTAL HEATING UNITS FOR THE MONTH.............362  DEPARTURE.........-43     
TOTAL HEATING UNITS FOR THE SEASON...........5989  DEPARTURE........+100
TOTAL HEATING UNITS LAST SEASON TO DATE......5379  DIFFERENCE.......+610
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................24 E   AT  8:50 A.M.     
                   AERO.......................N/A 
                   ASOS.......................23 ENE AT  7:58 A.M.    
                   DAVIS......................21 ENE AT  7:59 A.M. RMY 22
FASTEST MILE FOR YESTERDAY....................17 E   AT  8:51 A.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE.................17 E   AT  8:52 A.M     
MAXIMUM 2-MINUTE DAVIS AVERAGE................15 E   AT  8:52 A.M.     
AVERAGE WIND SPEED AND DIRECTION..............9.6 ENE      
                   ASOS......................10.0       
                   DAVIS......................8.6 ENE [060 deg]
* last of several occurrences...
 
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..........2.86  DEPARTURE.............-0.35      
                         ASOS..............2.84
TOTAL PRECIPITATION FOR THE YEAR..........17.98  DEPARTURE.............+0.77
                         ASOS.............18.38
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE..............-0.1
TOTAL SNOWFALL FOR THE MONTH................0.8  DEPARTURE..............-1.9
TOTAL SNOWFALL FOR THE SEASON..............85.6  DEPARTURE.............+23.2
 
PRELIMINARY CLIMATE SUMMARY FOR APRIL 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO 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
 
4/1  48/31/40/-1/0.00/0.0/694/91          29 NNE AERO N/A        RMY N/A
4/2  56/34/45/+4/0.00/0.0/452/69          22 WSW AERO 20 MPH WSW RMY N/A
4/3  55/36/46/+4/0.00/0.0/707/92          23 NNW AERO 22 MPH NW  RMY 25
4/4  47/35/41/-1/0.31/0.0/255/33          26 ESE AERO N/A        RMY 25
4/5  51/33/42/-1/0.19/0.0/186/24          39 WNW AERO N/A        RMY 40
4/6  58/29/44/+1/0.00/0.0/755/97          25 W   AERO N/A        RMY N/A
4/7  59/44/52/+9/0.05/0.0/187/24          28 SSE AERO N/A        RMY N/A
4/8  62/41/52/+8/0.61/0.0/016/02          45 W   AERO N/A        RMY 44
4/9  60/36/48/+4/0.00/0.0/707/90          35 NW  AERO N/A        RMY 36
4/10 57/33/45/0/0.00/0.0/742/94           38 S   AERO N/A        RMY 39
4/11 70/45/58/+13/T/0.0/111/14            32 S   AERO N/A        RMY N/A
4/12 68/44/56/+11/0.00/0.0/699/88         28 W   AERO N/A        RMY 28
4/13 65/45/55/+10/0.04/0.0/215/27         35 S   AERO N/A        RMY N/A
4/14 73/55/64/+18/0.00/0.0/296/37         55 SW  AERO N/A        RMY 62
4/15 66/38/52/+5/1.22/0.0/000/00          62 S   AERO N/A        RMY 68
4/16 43/28/36/-11/0.43/0.8/.../..         39 NNW AERO N/A        RMY 39
4/17 39/29/34/-13/T/T/.../..              35 NE  AERO N/A        RMY 34
4/18 42/28/35/-13/0.00/0.0/.../..         25 E   AERO N/A        RMY 25
4/19 62/35/49/1/0.00/0.0/.../..           31 NW  AERO N/A        RMY 32
4/20 52/36/44/-5/0.00/0.0/.../..          21 E   AERO N/A        RMY 22
 
4/21 morning low temp: 36F; the normal low is now 40F
 
DAILY RECORDS FOR APRIL 2014
4/14 - Minimum temperature of 55F EQUALS RECORD HIGH
MINIMUM FOR THIS DATE SET IN 1909.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):    
 
RECORDS FOR APRIL 21
HIGH 85 IN 1923
LOW 22 IN 1908
PRECIP 3.18 IN. IN 1991
SNOWFALL 0.8 IN. IN 1947
PEAK GUST 76e MPH NE IN 1940
 
RECORDS FOR APRIL 22
HIGH 85 IN 1977, 2001
LOW 26 IN 1981
PRECIP 1.85 IN. IN 2000
SNOWFALL 3.0 IN. IN 1940
PEAK GUST 68e MPH NW IN 1945
 
TODAY'S REPORT PREPARED BY: Robert Skilling