BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 5, 2010 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
NEW RECORD HIGH MAXIMUM TEMPERATURE OF 76F FOR
APRIL 4, SURPASSES THE PREVIOUS RECORD OF 71F IN 1950
 
RECORD BREAKING HIGH TEMPERATURE OF 76F FOR EASTER SUNDAY
APRIL TEMPERATURES CONTINUE TO RUN FAR ABOVE NORMAL
DOUBLE DIGIT DAILY DEPATURES FOR FIRST 4 DAYS OF THE MONTH
 
After a morning minimum temperature of 45
degrees and a record setting high temperature
of 76F (the previous record was 71F in 1950)
the day's mean of 61 yesterday averaged 19
degrees warmer than normal.  This leaves
the first 4 days of April running some
15 degrees above the 30-year average. 
 
Temperatures were in the 60s as the Red Sox
opened up the 2010 baseball season against
New York Yankees last evening at Fenway
Park. The weather seemed  more like an evening
during May or June! 
 
Today's observations:
 
7 A.M.
Weather: Clear,  few cirrus
Temperature: 57F, Dew point: 33F, Wind: ESE at 5 kts
Sea-level pressure: 30.18 inches Hg, rising
Visibility: 70 miles
6-hour minimum temp: 53F
BHO SA 1155 CLR 70 220/57/33/1205/018/ FEW CI/
8/001 52011 10057 20053   
 
10 A.M.
Weather: Broken dense cirrus, thin overcast cirrus, breaks
in the overcast  
Temperature: 65F, Dew point: 35F, Wind: SSE at 13 kts,
Sea-level pressure: 30.13 inches Hg, falling
Visibility: 70 miles
BHO SA 1455 E220 BKN 250 –OVC 70 203/65/35/1613/013/
PTCHS DENS CI ALQDS BINOVC WND 14V19/ 8/002 56017
 
1 P.M.
Weather: Scattered dense cirrus, cirrus, altocumulus lenticularis
all quadrants and altocumulus chaotic is a general state of
the sky with usual patches of dense cirrus  
Temperature: 70F, Dew point: 31F, Wind: S at 17G24 kts,
Wind: Direction variable SSE-SSW
Sea-level pressure: 30.05 inches Hg, falling
Visibility: 65 miles, NW 70 miles
6-hour maximum temp: 70F  
BHO SA 1755 200 SCT 220 SCT 250 SCT 65 175/70/31/1817G24/005/
ACSL ALQDS AC CHAOTIC PTCHS DENS CI WND 15V21/ 8/092 58028
10070 20057  
 
WEATHER SUMMARY FOR APRIL 4, EASTER SUNDAY
 
TEMPERATURE (DEGREES F)
MAX.....76     NORMAL.....51
MIN.....45     NORMAL.....33
MEAN....61     NORMAL.....42
 
DEPARTURE FROM 30-YEAR AVERAGE.............+19
TOTAL DEPARTURE FOR THE MONTH..............+62 (+15.3 DEGREES/DAY)
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY.............4    DEPARTURE.......-19
TOTAL HEATING UNITS FOR THE MONTH............31    DEPARTURE.......-62
TOTAL HEATING UNITS FOR THE SEASON.........5127    DEPARTURE......-430
TOTAL HEATING UNITS LAST SEASON TO DATE....5497    DIFFERENCE.....-370
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............27 W   AT   8:57 P.M. *
                   AEROVANE..............29 W   AT   8:57 P.M.  
                   ASOS..................26 W   AT   4:59 P.M.    
                   DAVIS.................29 W   AT   4:58 P.M.   
THE FASTEST MILE FOR YESTERDAY...........19 W   AT   8:08 P.M. *  
MAXIMUM 2-MINUTE ASOS AVERAGE............20 WSW AT   1:47 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE...........21 WNW AT   3:59 P.M.     
AVERAGE WIND SPEED AND DIRECTION.........13.3 W 
                   ASOS..................13.2
                   DAVIS.................13.4 SSW [194 DEG]
* last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH.........trace  DEPARTURE......-0.60
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR..........27.91  DEPARTURE.....+13.68
                         ASOS.............28.10
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.1
TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE......-0.5
TOTAL SNOWFALL FOR THE SEASON..............64.4  DEPARTURE......+7.0
 
PRELIMINARY CLIMATE SUMMARY FOR APRIL 2010 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 when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
4/1  59/43/51/+10/T/0/359/47        24 NNW   AERO 30 MPH NNW
4/2  67/46/57/+15/0.00/0/.../..     21 SSE
4/3  75/45/60/+18/0.00/0/.../..     26 SSE
4/4  76/45/61/+19/0.00/0/.../..     27 W     AERO 29 MPH W 
 
4/5  our morning low temp: 53F; the normal low is now 34F
 
NEW DAILY RECORDS FOR APRIL 2010
4/4 - new record high maximum temperature of 76F;
surpasses 71F in 1950.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR APRIL 5
HIGH 81 IN 1928
LOW 15 IN 1995
PRECIP 2.15 IN. IN 1987
SNOWFALL 4.0 IN. IN 1898
PEAK GUST 76 MPH WNW IN 1963
 
RECORDS FOR APRIL 6
HIGH 82 IN 1921
LOW 16 IN 1982
PRE 1.72 INS IN 1886
SNOW 12.3 INS IN 1982
WIND 71e MPH WNW IN 1940
 
TODAY'S REPORT PREPARED BY: Robert Skilling